CN101589434A - Optical disc medium, optical disc device, optical disc reproduction method and integrated circuit - Google Patents

Abstract

It is an object to provide an address format that properly controls a recording line density and the number of information-recording layers for an information-recording medium to increase a recording capacity of the information-recording medium such as an optical disc in the range for making it possible to secure a necessary SN ratio. The optical disc is provided with an information-recording layer including concentric circles or spiral-shaped tracks, and has a format for describing track addresses recorded on a track in advance or added to data to be recorded on the information-recording layer. The format includes layer information on the information recording layers and address information on the track addresses. In a first optical disc having a first recording density, the layer information of the first optical disc is described by the first number of bits and the address information of the first optical disc is described by the second number of bits. In a second optical disc having a second recording density that is larger than the first recording density, the layer information of the second optical disc is specified by the number of bits that is less than the first number of bits and the address information of the second optical disc is specified by the number of bits that is more than the second number of bits. The total number of bits of the layer and address information of the second optical disc is equal to the sum of the first and second numbers of bits.

Description

CD media, optical disc apparatus, optical disc record reproducing method and integrated circuit

Technical field

[0001]

The present invention relates to for information correctly being recorded the assigned position of information recording carriers such as CD, correctly reproduce this information and the form of the address information used and follow the recording of information reproducing technology of this address information form.

Background technology

[0002]

In recent years, people were falling over each other and were researching and developing highdensity CD.At present, for example Blu-ray Disc (BD) is put on market, uses in the record picture of digital broadcasting etc., and CD is being established its status as important information medium.In addition, as the trend of a nearly step densification, people just research and develop at the bigger recording capacity of the BD of contrast standardization.These situations are for example seen non-patent literature 1.

[0003]

In order to increase the recording capacity of every CD, people have found out the method for stacked many pieces of recording films (perhaps being also referred to as " information recording layer ").Figure 13 illustrates the configuration example of the phase change thin film disk of multilayer.Illustrated CD is with information recording layer 502 formations of (n+1) layer.If specifically tell about its structure, so in CD, inject the surface of side from laser 505, stacking gradually information recording layer (Nn～LO layer) 502, the polycarbonate substrate 500 of protective seam 501, (n+1) piece.In addition, also, insert the middle layer 503 that plays a role as optical padded coaming at the interlayer of the information recording layer 502 of (n+1) piece.Like this, and can keep every layer recording capacity, and meanwhile sandwich construction adopted, thus increase the recording capacity of every CD.

[0004]

In order to increase the recording capacity of every CD, in addition, people have also found out the method that improves call wire density, and/or the method that track space (width of track) is narrowed down.

[0005]

In the method that improves call wire density, can increase recording capacity by reducing record mark length.When for example recording capacity was the BD of 25 GB (GB), the shortest mark length was 0.149um, if use the length T that becomes benchmark, can be " 2T " with this value representation just.Reduce to become the T of benchmark, just can improve recording capacity.In addition, T represents the benchmark raceway groove time, and T length is 0.0745um.If for example make the 0.0745um of the long 25GB of T become 0.062um, just can make every layer recording capacity become 30GB.

[0006]

In addition,, for example be provided with, just can increase recording capacity than behind the narrow track space of the track space 0.32um of BD as the method that track space is narrowed down.

[0007]

In general, in CD, in the assigned position of information recording carrier record-playback information correctly, and record and narrate address information with the formal definition of regulation.This address information is being inserted into the track dextrorotation that utilizes recorded information when hummock wriggling the swinging signal that swing that the back forms represents, often is inserted into information (data) inside of record.About these situations, for example see patent documentation 1.

[0008]

Figure 14 is illustrated in the CD of prior art, the example of the form of the track address of being write down in advance by track.

[0009]

Record unit's 64 kilobyte (kB) according to each data are divided into piece with track, successively the allocation block address value.Piece is partitioned into the sub-piece of the length of regulation, constitutes 1 piece with 3 sub-pieces.Sub-piece is by from the front, distributes 0～2 sub-piece number successively.

[0010]

With the numerical information of total 23 bits of the numerical information addition of 2 bits of the numerical information of 18 bits of the numerical information of 3 bits of the level number of expression in the multiplayer optical disk, expression block address, the sub-piece of expression number, by track according to each sub-piece record in advance.The optical disc apparatus of the reproduction video disc recording of the prior art reproduces the numerical information of described 23 bits according to each sub-piece, thereby on one side can follow the tracks of level number, block address and sub-piece number, Yi Bian the searched targets piece carries out the record or the reproduction of data to object block.

[0011]

When increasing recording capacity, can be according to the method that improves its capacity, for example, determine each corresponding position of recording capacity with increase by increasing the method for level number, block address and sub-piece number.

Non-patent literature 1: the blue laser disk reader of diagram ohm society

Patent documentation 1:JP spy opens the 2004-134009 communique

[0012]

After in stacked many information recording layers, improving call wire density, can further increase the recording capacity of every CD., in this structure, often be difficult to set up the record of realization stable data and/or the system of reproduction.

[0013]

At first, multilayer laminated information recording layer, increase recording capacity after, during reproduction, result from multiple stratification, in each information recording layer, the reproducing signal amplitude descends, promptly SN is than (Sigual to NoiseRatio:SNR) deterioration.Therefore, need to install and be intended to compensate the large-scale variable amplitude amplifier that this amplitude descends, than deterioration, realize being intended to keep the signal Processing of enough reproduction performances for SN.In addition, in CD, under the restriction of the thickness direction of configuration information recording layer, in order to realize multiple stratification, the multilayer parasitic light promptly becomes big from the influence of the signal of the information recording layer of adjacency, and then the SN that often produces reproducing signal compares deterioration.

[0014]

On the other hand, after employing raising call wire density increased the method for recording capacity, this simple reason because record mark diminishes produced SN and compares deterioration.

[0015]

In addition, adopt track space is narrowed down increase the method for recording capacity after, compare with the structure of existing CD, the structure of CD changes a lot, use need be re-recognized the optical structure of optical disc apparatus significantly.On the viewpoint of exchanging with present standardization, the cost of optical head increases, and lacks feasibility.

Summary of the invention

[0016]

Like this, multilayer laminated information recording layer, after improving call wire density simultaneously and increasing recording capacity, the SN during from optical disc replay information is quite more remarkable than deterioration.Increase the number of plies of information recording layer more, and improve call wire density more, just being easy to generate this SN more compares deterioration.

[0017]

The present invention develops at above-mentioned situation, and its purpose is to provide for the recording capacity that increases information recording carrier such as CD in the scope that can guarantee necessary SN ratio, the address format of the recording medium of the number of plies of controlling recording line density and information recording layer suitably.Another object of the present invention is to constitute with this address format the track address of recorded information medium, construct can be corresponding with this address format the optical disc record reproducing system.

[0018]

Adopt CD of the present invention, be to have to possess the information recording layer that comprises concentric circles or spiral helicine track, data that write down in advance by described track or that write down by information recording layer are additional, be intended to record and narrate the CD of the form of track address, described form, comprise the layer information of relevant described information recording layer and the address information of relevant described track address, in having the 1st CD of the 1st recording density, record and narrate the layer information of described the 1st CD with the 1st bit number, record and narrate the address information of described the 1st CD with the 2nd bit number, in the 2nd CD with the 2nd recording density bigger than described the 1st recording density, determine the layer information of described the 2nd CD with the bit number that lacks than described the 1st bit number, determine the address information of described the 2nd CD with the bit number of Duoing than described the 2nd bit number, the total bit number of the layer information of described the 2nd CD and the address information of described the 2nd CD equals described the 1st bit number and described the 2nd bit number sum.

[0019]

Described CD is that read-only type reproduces special-purpose cd; Described data can form with concavo-convex hole.

[0020]

Adopting method of the present invention, is the method for reproducing above-mentioned CD, comprises the step of reproducing described layer information and the step of reproducing described address information.

[0021]

Adopting CD of the present invention, is the CD that possesses information recording layer, in described information recording layer, predesignates the form that is intended to record and narrate the track address that is write down in advance by track or added by data; Described information recording layer comprises the zone of depositing about the recording density of described information recording layer; Described form comprises the layer information of relevant described information recording layer and the address information of relevant described track address; Described layer information is recorded and narrated with the 1st bit number; Described address information is recorded and narrated with the 2nd bit number; When the information of relevant described recording density surpasses the track value, record and narrate described layer information with the bit number that lacks than described the 1st bit number, record and narrate described address information with the bit number of Duoing than described the 2nd bit number, and the total bit number of described layer information and described address information, equal described the 1st bit number and described the 2nd bit number sum.

[0022]

Described CD is to use the CD of the different multiple label record data of length; Frequency---the spatial frequency of the reproducing signal when reproducing some at least mark in the described multiple mark can be higher than OTF (Optical Transfer Function: cutoff frequency optical transfer function).

[0023]

Described CD, make Wavelength of Laser to track irradiation be λ nm, with the numerical aperture of the object lens of laser focusing to track be NA, the shortest mark of record is long long during for TSnm for TMnm, the shortest interval in orbit, can become (TM+TS)＜λ ÷ (2NA).

[0024]

Described CD can make the length T M+TS with the shortest described mark TM and the long TS addition in the shortest described interval, less than 238.2nm.

[0025]

Described CD can write down the multiple mark of modulating rule modulation according to the rules; When making the reference period of described modulation be T, the shortest described mark can be 2T, and the shortest described interval length can be 2T.

[0026]

Described CD can write down the multiple mark of modulating rule modulation according to the rules; The modulating rule of described regulation can be the 1-7 modulating rule.

[0027]

The information of relevant described recording density can be the information of the recording capacity in the described information recording layer of expression.

[0028]

The value of described regulation can be 25 GB.

[0029]

The information of relevant described recording density can be the information of the call wire density in the described information recording layer of expression.

[0030]

The width of the track that described information recording layer is provided with is identical, can allow multiple recording density.

[0031]

Described address information and described layer information utilize the swing of described track to represent, perhaps record and narrate in the inside of the data of described record; Represent described layer information bit string, compare, can be configured in a high position with the described address information Bit String of expression.

[0032]

Described CD possesses BCA zone and ingress area; In described ingress area, comprise the PIC zone; In described BCA zone or described PIC zone, can write down the information of relevant described recording density.

[0033]

Adopting method of the present invention, is the method for reproducing above-mentioned CD, comprises from described BCA zone or described PIC zone, reproduces the step of the information of relevant described recording density.

[0034]

Described CD possesses the information recording layer that is configured in from photoirradiated surface position farthest---key horizon, be configured in than described key horizon near the information recording layer of described photoirradiated surface side---the 1st information recording layer, be configured in the middle layer between described key horizon and described the 1st information recording layer---the 1st middle layer; Described key horizon can comprise the zone of depositing about the information of described recording density.

[0035]

Described CD possesses and is configured in than described the 1st information recording layer near the information recording layer of described photoirradiated surface side---the 2nd information recording layer, be configured in the middle layer between described the 1st information recording layer and described the 2nd information recording layer---the 2nd middle layer; The width in described the 1st middle layer can be greater than the width in described the 2nd middle layer.

[0036]

Adopt optical disc apparatus of the present invention, be can to above-mentioned CD carry out the record of data and reproduce at least one optical disc apparatus, possess: output unit, this output unit are exported the reproducing signal corresponding with catoptrical light quantity to described CD reflection light beam; The 1st reproduction units, the 1st reproduction units reproduce the information of relevant described recording density from described BCA zone or described PIC zone; The 2nd reproduction units, the 2nd reproduction units reproduce described layer information and described address information according to described reproducing signal; Recognition unit, this recognition unit is corresponding with the information of the relevant described recording density of being reproduced by described the 1st reproduction units, uses the bit number of Duoing than described the 2nd bit number to discern described address information; According to described layer information and the described address information that bit number is discerned after changing, carry out the record of data and at least one in the reproduction.

[0037]

Adopt device of the present invention, be pack into can to above-mentioned CD carry out the record of data and reproduce at least one the control device of optical disc apparatus, described control device, possess: the 1st reproduction instruction unit, the instruction of the 1st reproduction instruction unit is reproduced the information of relevant described recording density from described BCA zone or described PIC zone; The 2nd reproduction instruction unit, the 2nd reproduction instruction unit are according to the reproducing signal from described CD, and described layer information and described address information are reproduced in instruction; Recognition unit, this recognition unit is corresponding with the information of the relevant described recording density of being reproduced by described the 1st reproduction instruction unit, with the described layer of the bit number identification information of lacking than described the 1st bit number, use the bit number of Duoing to discern described address information than described the 2nd bit number.

[0038]

In order to solve above-mentioned problem, CD media of the present invention is characterized in that: be the CD media that possesses the recording layer more than 2 at least; Described CD media, possess constituted in advance by track or data recording after the form of the track address that constitutes; Described form comprises layer information and address information at least, and is corresponding with the recording density of the data of described CD media record, do not change the bit number of the total of described layer information and described address information, and change bit configuration ground constitutes.

[0039]

In addition, described recording density when can be in the shortest mark frequency of the data of described CD media record higher than OTF band territory, be compared when lower than OTF band territory with the shortest mark frequency, reduces described layer information number ground formation.

[0040]

In addition, described CD media can be in all recording layers, make the width of track of record identical, allow a plurality of call wire density.

[0041]

In addition, the information of described layer information number can be the information of bit configuration that is used as the high position of the track address format information that the data wriggling information inside inner or swing of record comprises.

[0042]

In addition, represent the information of described recording density, can be recorded in the information in BCA zone that described CD media writes down in advance or PIC zone.

[0043]

Optical disc apparatus of the present invention, it is characterized in that: be record or the optical disc apparatus that reproduces the CD media that possesses the recording layer more than 2 at least, possess physical message reproduction units (this physical message reproduction units reproduces on the described CD media call wire density information that comprises in the information in the BCA zone of record in advance or PIC zone) and address reproduction units (this address reproduction units reproduces layer information and the address information at least that the track form that constitute in advance or the track address that the record back constitutes on the described CD media comprises), the described call wire density information that reproduces with described physical message reproduction units is corresponding, after changing the bit configuration of described layer information that described address reproduction units reproduces and described address information, reproduce address information.

[0044]

In addition, described call wire density information, be that the shortest mark frequency with the data of described CD media record is identified as A when higher than OTF band territory, is identified as the information of B when will the shortest mark frequency lower than OTF band territory, can be when described identifying information be represented A, compare during with expression B, after reducing the bit configuration of the described address information of described layer information number ground change, reproduce address information.

[0045]

Optical disc record reproducing method of the present invention, it is characterized in that: be record or the optical disc record reproducing method that reproduces the CD media that possesses the recording layer more than 2 at least, possess that physical message is reproduced step (this physical message is reproduced step and reproduced on the described CD media call wire density information that comprises in the information in the BCA zone of record in advance or PIC zone) and step (this address is reproduced step and reproduced layer information and the address information at least that the track form that constitute in advance or the track address that the record back constitutes on the described CD media comprises) is reproduced in the address, the described call wire density information that reproduces with described physical message reproduction units is corresponding, after changing the bit configuration of described layer information that described address reproduction units reproduces and described address information, reproduce address information.

[0046]

In addition, described call wire density information, be that the shortest mark frequency with the data of described CD media record is identified as A when higher than OTF band territory, is identified as the information of B when will the shortest mark frequency lower than OTF band territory, can be when described identifying information be represented A, compare during with expression B, after reducing the bit configuration of the described address information of described layer information number ground change, reproduce address information.

[0047]

Integrated circuit of the present invention, it is characterized in that: be for the CD media controlling recording that possesses the recording layer more than 2 at least or the integrated circuit of reproduction, possess physical message reproducing circuit (this physical message reproducing circuit reproduces on the described CD media call wire density information that comprises in the information in the BCA zone of record in advance or PIC zone) and address reproduction circuit (this address reproduction circuit reproduces layer information and the address information at least that the track form that constitute in advance or the track address that the record back constitutes on the described CD media comprises), the described call wire density information that reproduces with described physical message reproduction units is corresponding, after changing the bit configuration of described layer information that described address reproduction units reproduces and described address information, reproduce address information.

[0048]

In addition, described call wire density information, be that the shortest mark frequency with the data of described CD media record is identified as A when higher than OTF band territory, is identified as the information of B when will the shortest mark frequency lower than OTF band territory, can be when described identifying information be represented A, compare during with expression B, reproduce address information behind the described address information bit of configuration change, so that reduce described layer information number.

[0049]

After adopting the present invention, because the recording capacity of information recording carriers such as increase CD, so the optical disc record reproducing system corresponding with this address format constructed in the track address of the address format configuration information recording medium of the number of plies of enough suitably controlling recording line densities of energy and information recording layer.Like this, on one side can keep interchangeability with the optical disc record reproducing system of prior art, Yi Bian realize stable recording/reproducing system.In addition, because the disposal route of the value of the numerical information of only change reproducing just can be corresponding, so do not need to change significantly hardware, the complicated and hardware size that can prevent locking system increases and the cost increase that causes.

Description of drawings

[0050]

Fig. 1 is the figure of structure of the physical property of the expression CD 1 that adopts the 1st embodiment.

Fig. 2 is illustrated in the track 2 of the CD 1 that adopts the 1st embodiment the figure of the example of the form of the track address of record in advance.

Fig. 3 is the figure of variation of the dish B of the relevant Fig. 2 of expression.

Fig. 4 (A) is the figure of the example of expression BD, (B) is the figure of expression recording density greater than the example of the CD of BD.

Fig. 5 is the figure of expression to the sample attitude of the flag column illumination beam that writes down in orbit.

The figure of the OTF when Fig. 6 is expression BD25GB recording capacity and the relation of shortest recording mark.

Fig. 7 is a spatial frequency of representing the shortest mark (2T) becomes the figure of 0 example greater than the amplitude of the reproducing signal of OTF cutoff frequency and 2T.

Fig. 8 is the figure of the relation of expression recorded data amount and address value.

Fig. 9 is the data structure of expression BD and the figure of data address form.

Figure 10 is the block scheme of the structure of the expression optical disc apparatus 450 that adopts the 2nd embodiment.

Figure 11 A is the figure of the regional structure of expression CD 400.

Figure 11 B (1) be the expression prior art recording density dish A and have the figure of structure of information recording layer of the dish B of bigger recording density, (2) and (3) are the figures of concrete structure that the ingress area 420 of dish A and dish B is shown respectively.

Figure 12 is the figure of an example of the step of the action in the startup of expression optical disc apparatus 450.

Figure 13 is the figure of configuration example of the phase change thin film disk of expression multilayer.

Figure 14 is illustrated in the CD of prior art, the figure of the example of the form of the track address of being write down in advance by track.

[0051]

Symbol description

400 CDs

401 shaven heads

402 motor

403 servo circuits

404 track address reproduction circuits

405CPU

406 data recording/reproducing circuit

407 data address reproducing circuits

The 410BCA zone

420 ingress areas

430 user areas

440 export areas

The 421PIC zone

The 422OPC zone

The 423INFO zone

445 optical disc controllers

450 optical disc apparatus

Embodiment

[0052]

(the 1st embodiment)

Fig. 1 illustrates the structure of the physical property of the CD 1 that adopts present embodiment.In discoid CD 1, for example concentric circles or helically form many tracks 2, in each track 2, form segmented many fan-shaped.In addition, as described later, in each track 2, with the piece 3 of the size predesignated as unit, record data.

[0053]

Adopt the CD 1 of present embodiment, compare with the CD (for example BD) of prior art, the recording capacity that information recording layer is every layer is expanded.The expansion of recording capacity can realize by the mode that improves call wire density, for example can be realized by the long mode of the record mark of video disc recording by further shortening.Here, so-called " improving call wire density " is meant and shortens the raceway groove bit long.So-called " raceway groove bit " then is meant the length of the reference period T that is equivalent to the modulation when modulating rule record mark according to the rules.

[0054]

In addition, can be with CD 1 multiple stratification.Its number of plies is in the scope that the layer information of the form that utilizes the employing present embodiment of hereinafter telling about can be recorded and narrated.But, for the ease of telling about, below only refer to 1 information recording layer.

[0055]

In addition, when a plurality of information recording layer is set,, mark length is equally changed in each layer, make call wire density difference in each layer even when the width of the track that each information recording layer is provided with is identical.

[0056]

Corresponding with the expansion of recording capacity, in the present embodiment, the description method of address also is expanded.Below, this is specifically told about.

[0057]

The 64kB of record unit (kilobyte) according to each data is divided into piece with track 2, successively the allocation block address value.Piece is partitioned into the sub-piece of the length of regulation again, constitutes 1 piece with 3 sub-pieces.Sub-piece is by from the front, distributes 0～2 sub-piece number successively.

[0058]

Fig. 2 is illustrated in the example of the form of the track address that the track 2 of the CD 1 that adopts present embodiment writes down in advance." dish A:xGB/ layer " is the form corresponding with the CD that prior art is shown as a reference." dish B:yGB/ layer " then is and the corresponding form of CD that adopts present embodiment.

[0059]

In the CD A of the recording density of xGB/ layer, address information 4 by with the floor information of 3 bits that will represent level number, represent block address 19 bits block address information 6 and represent the total 24 bits record of sub-piece information addition of 2 bits of sub-piece number.This address information 4 is in each sub-piece, by track 2 record in advance.

[0060]

The CD of the prior art is carried out the optical disc apparatus of record-playback, make each sub-piece reproduce the address information 4 of 24 bits, thereby on one side can follow the tracks of level number, block address and sub-piece number, Yi Bian the searched targets piece carries out the record or the reproduction of data to object block.

[0061]

In this example, layer information is recorded and narrated by 3 bits with the most significant digit that is positioned at address information 4, can use 0x0～0x7 (16 system souvenir) performance to add up to 8 layers.Description method for example will be from the position (bit position 5) of the 21st bit of significant bits 0 number time-outs as the significant bits of layer information, with the most significant bit of the 23rd bit as layer information, with 2 system souvenir level numbers.

[0062]

The block address information 6 of 19 bits can show the address in the scope of 0x0000～0x7FFF.For example in BD, the maximal value of the block address that can obtain is 0x7FFF, and each piece can write down the user data of 65536 bytes (B).Like this, but the maximum recording capacity just approximately becomes 32.2GB.

[0063]

Distribute to the sub-piece information of 2 bits of lowest order, can enough 0x0～0x3 performance add up to 4 subaddressings.

[0064]

On the other hand, in the dish B (every layer of recording density that surpasses above-mentioned xGB/ layer) of the recording density of the yGB/ layer that adopts present embodiment, address information 4 is by on this point that adds up to 24 bits to record and narrate, and is identical with the address information of above-mentioned dish A.In addition, about sub-piece information, dish B is also identical with dish A.

[0065]

, with the layer information of 3 Bit Allocation in Discrete, but restriction becomes 2 bits in dish B in dish A.In dish B, layer information is for example used the 22nd bit and the record of the 23rd bit of counting time-out from significant bits.

[0066]

And 1 bit of the existence the 21st bit of counting time-out from significant bits (bit position 5) that distributes as the part of layer information in dish A is assigned to the part of block address information 7.In other words, block address information 7 becomes the numerical information of recording and narrating with 20 bits.

[0067]

After adopting the form of the dish B that present embodiment relates to, replace the recording density of each information recording layer is brought up to the above method of regulation, adopt on address format record is allowed that number of plies restriction becomes the method for half.In other words, compare with the dish A of prior art, the record of dish B allows that the number of plies is subjected to the restriction of physical property.Like this, can limit multiple stratification, in order to avoid SN compares deterioration.

[0068]

In addition, in dish B,, utilize in the dish A of prior art as 1 bit in 3 bits of layer information distribution as the part of block address information 7.Like this, can be by improving the necessity that recording density satisfies the block address that must record and narrate more.In other words, can become the measure that solves the block address deficiency.

[0069]

Like this, after the address format that the employing present embodiment relates to, for limiting layer information, and employing can be guaranteed required SN ratio after the structure of the address structure of certain density change CD more than the regulation.

[0070]

In addition, in an embodiment of the present invention,, use the bit configuration figure of Fig. 2 to tell about as concrete example.But be not limited thereto.The configuration of layer information bit, block address bit, sub-piece bit also can be different.In addition, bit number also can be different.

[0071]

In addition, as the restriction of the layer information of high-order 3 bits in address information 24 bits, told about and to be transformed into the example of address information from the 22nd bit that significant bits is counted time-out.But layer information bit distributed to the method for block address bit, be not limited to said method.The 23rd bit and the 24th bit, promptly which bit of presentation layer information can be transformed into address information.Bit number and the bit position distributed are not limited to above-mentioned situation.

[0072]

For example: Fig. 3 illustrates the variation of the dish B of relevant Fig. 2.In this embodiment, as the part of the block address information in dish B, utilize most significant bit (bit position 6) in 3 bits that in dish A, constitute layer information.Its result, in this example, block address information also shows with 20 bits.Other structure, since identical with Fig. 2, so repeat no more.

[0073]

After adopting this structure, no matter in which of dish A and dish B, count the 21st bit and the 22nd bit of time-out, must record and narrate low level 2 bits of layer information from significant bits.With two devices that dish is corresponding, for low level 2 bits of layer information, can read the bit value of same bit position all the time, can obtain a layer information.

[0074]

For example: the 1st layer in the layer information/multilayer disc in the single-layered disk layer information is recorded and narrated for " 000 ", with the 2nd layer in the multilayer disc layer information record and narrate for " 001 ", with the 3rd layer in the multilayer disc layer information record and narrate to " 010 ", the 4th layer in the multilayer disc layer information is recorded and narrated is " 011 ", when being " 100 " etc. with the 5th layer in the multilayer disc layer information record, as address information, use the most significant bit of the dish use of (5 layers～8 layers) more than 5 layers.In other words,, obtain low level 2 bits, so when obtaining the layer information of the dish below 4 layers, do not need to add change because can read the bit of same position.

[0075]

Below, for the call wire density that the restriction that makes layer information changes, as object lesson, use Fig. 4, Fig. 5 and Fig. 6 to tell about BD.

[0076]

Fig. 4 (A) illustrates the example of BD.In BD, the wavelength of laser 123 is 405nm, and the numerical aperture of object lens 20 (Numerical Aperture:NA) is 0.85.This BD is corresponding with dish A in above-mentioned Fig. 2.

[0077]

Same with DVD, in BD, record data also are used as flag column 120,121 records that physical property ground changes on the track 2 of CD.In this flag column, the mark that length is the shortest is called " the shortest mark ".In the drawings, flag column 121 is the shortest marks.

[0078]

During the BD25GB recording capacity, the length of the physical property of the shortest mark 121 becomes 0.149um.This is equivalent to the about 1/2.7 of DVD, even change wavelength parameter (405nm) and the NA parameter (0.85) of optical system, the resolution of raising laser, also near light beam can the identification record mark the limit---the limit of optical resolution.

[0079]

Fig. 5 illustrates the sample attitude of the flag column illumination beam that writes down on track.In BD, under the effect of above-mentioned optical system parameter, luminous point 30 becomes the degree of about 0.39um.When not changing the structure ground raising call wire density of optical system, because for the spot diameter of luminous point 30, record mark diminishes relatively, so the resolution of reproducing descends.

[0080]

For example Fig. 4 (B) illustrates the example of recording density greater than the CD of BD.This CD is corresponding with dish B in above-mentioned Fig. 2.The wavelength of the laser 123 of this dish also is 405nm, and the numerical aperture of object lens 220 (Numerical Aperture:NA) also is 0.85.In the flag column 125,124 of this dish, the length of the physical property of the shortest mark 125 becomes 0.1115um.Compare with the BD of Fig. 4 (A), spot diameter is identical, is approximately 0.39um.But because record mark diminishes relatively, and the mark gap also narrows down, so the resolution of reproducing descends.

[0081]

Reproduce the amplitude of the reproducing signal when the record mark with light beam,, become zero at the limit place of optical resolution along with record mark shortens and descends.Inverse with cycle of this record mark is called " spatial frequency "; Relation with spatial frequency and signal amplitude is called " OTF (OpticalTransfer Function) ".Basically straight line descends signal amplitude along with the increase of spatial frequency, will become the limit of zero reproduction, is called " OTF is by (cutoff) ".

[0082]

OTF when Fig. 6 illustrates the BD25GB recording capacity and the relation of shortest recording mark.The spatial frequency of the short record of BD, for OTF by for, be about 80%, end near OTF.In addition, know that also the amplitude of the reproducing signal of short mark is also very little, be about 10% of the peak swing that can detect.Why OTF becomes almost absent variable recording capacity by promptly reproducing amplitude, is because become the cause that is equivalent to about 31GB in BD.The frequency of the reproducing signal of short mark after becoming near the of OTF cutoff frequency or becoming frequency above it, often reaches or surpasses the limit of the resolution of laser, and the reproduction amplitude of reproducing signal diminishes, and becomes the zone of SN than rapid deterioration.

[0083]

For example Fig. 7 spatial frequency that the shortest mark (2T) is shown becomes 0 example greater than the amplitude of the reproducing signal of OTF cutoff frequency and 2T.The spatial frequency of the shortest bit long 2T is 1.12 times of OTF cutoff frequency.This example illustrates the relation of recording density greater than the OTF and the shortest recording mark of the CD of BD shown in Figure 3.

[0084]

In addition, the relation of the wavelength among the dish B of high record density, numerical aperture, mark, interval length is as follows.

[0085]

Use laser wavelength lambda (405nm ± 5nm, promptly 400～410nm), after 3 parameters such as numerical aperture NA (0.85 ± 0.01, promptly 0.84～0.86), the shortest mark+long P in the shortest interval when modulating (17, P=2T ÷ 2T=4T), up to becoming

P＜λ/2NA

Till, after benchmark T diminishes, just surpass the OTF cutoff frequency.

[0086]

Be equivalent to make the benchmark T of the OTF cutoff frequency of NA=0.85, λ=405 o'clock, become

T＝405/(2×0.85)/4＝59.558nm

[0087]

Like this, even only improve call wire density, SN is than also deterioration under the effect of the limit of optical resolution.Therefore, on the viewpoint of system redundancy amount, often can not allow that the SN that the multiple stratification of information recording layer causes compares deterioration.Particularly as mentioned above, SN than deterioration from the frequency of shortest recording mark cross the OTF cutoff frequency around begin significantly, to prevent that the SN that multiple stratification causes from comparing deterioration so, need the number of plies of the multiple stratification of restricted information recording layer in order to keep the SN ratio of regulation.

[0088]

As mentioned above, in the present embodiment, with the above recording density of regulation in each information recording layer during recorded information, for limiting layer information, and the address format of change CD.Like this, just can the physical property ground restriction record number of plies.Its result can guarantee to make the system redundancy amount to become the above SN ratio of specialized range, can realize stable recording/reproducing system.For example above-mentioned what is called " recording density that specialized range is above " in the BD standard, becomes the capacity of about 32.2GB.Like this, a concrete example as xGB/ layer among Fig. 2 and yGB/ layer just becomes x=25, y=33.The former is the BD of prior art, and the latter is corresponding with above-mentioned dish B, recording density is greater than the dish (following record is " compact disc ") of BD.

[0089]

That Fig. 8 illustrates is corresponding with above-mentioned example, the relation of recorded data amount and address value.With about 32.2GB as having a common boundary, having among the compact disc B (Fig. 1) of the posting field bigger than it, in the present embodiment, record and narrate block address with 20 bits of having expanded 1 bit.The address value of this expansion can be recorded and narrated the value greater than ox7FFFF.

[0090]

Above tells about, and is the example of the description method of relevant additional address to BD and compact disc.On the other hand, the data of BD and compact disc record are also by extra address.

[0091]

Below, tell about the address format of adding to the data of BD record.

[0092]

Fig. 9 illustrates the common data structure and each the data address form that adds to the data of BD and compact disc of BD and compact disc.

[0093]

Data are by being divided into piece according to 64kB, piece and then be divided into record behind 32 sectors according to 2kB.2 sectors are reduced a data set, in the front of each data set, insert the data address information of 4 bytes (32 bit), by track record.

[0094]

Additional data address to record data is inserted into each data set.A data set is 2 sectors.

[0095]

In BD (dish A), with 32 table of bits registrations according to the address.It thes contents are as follows: from a high position, bit number 31～28 is the assignment flag bit successively.So-called " flag bit " is in the defect management catalogue that the file management zone of BD (not shown) is provided with, as additional when the defective data address registration.Bit number 27 is untapped Spare bits.

[0096]

The level number of bit number 26～24 expression information recording layers.Bit number 23～5 expression block address information.Data group number in bit number 4～1 these pieces of expression.Give bit number 4～1 and then add 5 bits of bit number 0, represent the sector number in this piece.

[0097]

The bit value of bit number 0 is fixed to " 0 ".This is because data address is attached to the front of each data set, so the sector number that distributes becomes the cause of even number all the time.

[0098]

On the other hand, same about the example of compact disc (dish B) and in front Fig. 2, Fig. 3, in compact disc, will be as 1 bit in 3 bits of layer information distribution, as the part utilization of block address information in BD.As shown in Figure 9, the bit of the position of 24 bits with significant bits during as 0 bit is used as the most significant bit utilization of block address information.Its result, layer information is represented with 2 bits.

[0099]

In above telling about, tell about the situation of only distributing 1 bit.But be not limited thereto, consider in the record number of plies of the recording density of regulation and regulation, can guarantee the equilibrium point of the SN ratio stipulated, in the bit number of the form of distributing to the track address, can Distribution Layer information bit and number of address bits.

[0100]

(the 2nd embodiment)

Then, tell about according to call wire density the embodiment of the optical disc apparatus of switchable layer information calculations and address computation.

[0101]

Figure 10 is the block scheme of the structure of the expression optical disc apparatus 450 that adopts present embodiment.Optical disc apparatus 450 can reproduce data from CD 400, with data recording in CD 400.In addition, the function of record data is not essential, and optical disc apparatus 450 also can be to reproduce special-purpose Disc player.At this moment, do not need to possess in the function of data recording/reproducing circuit of the optical disc apparatus of hereinafter telling about 450 the reception of carrying out record data and to the function that writes processing of CD 400.

[0102]

CD 400 is some among dish A shown in Figure 1 or the dish B.Optical disc apparatus 450 is according to packing which kind of CD and change action into.

[0103]

Optical disc apparatus 450 possesses CD 400, shaven head 401, motor 402, servo circuit 403, track address reproduction circuit 404, CPU405, data recording/reproducing circuit 406, data address reproducing circuit 407.

[0104]

Servo circuit 403, track address reproduction circuit 404, CPU405, data recording/reproducing circuit 406, data address reproducing circuit 407 are used as a chip circuit (optical disc controller) 445 and install.Optical disc controller 445 is used as control device, the optical disc apparatus 450 of packing into.

[0105]

In addition, they also can all not become a chip.For example can not comprise servo circuit 403.Perhaps track address reproduction circuit 404 can be packed in the CD 400.And then.Can also not make them become a chip, and be provided with separately as circuit independently.

[0106]

CD 400 has the track of record data, in orbit according to the address format recording address value shown in above-mentioned the 1st embodiment.Form behind the creeprail, utilize the frequency of wriggling or the modulation of phase place, the recording address value.In addition, owing to CD 400 can be installed and removed from optical disc apparatus 450, so be not optical disc apparatus 450 requisite inscapes.Please be noted this.

[0107]

Bare headed 401 to CD 400 illumination beams, on one side scan track, detect reflection light quantity on one side from CD 400, export the electric signal (reproducing signal) corresponding with reflection light quantity.Though all there is not diagram, but in shaven head 401, light source (this light emitted light beam), lens (these lens focus on light beam) and light accepting part (this light accepting part is accepted beam reflected with the information recording layer of CD 400, exports the reproducing signal corresponding with reflection light quantity) are set.

[0108]

Motor 402 makes the revolution rotation of CD 400 usefulness appointments.

[0109]

Servo circuit 403 is according to the reproducing signal from shaven head 401, generate and the corresponding servo error signal of light beam spot condition in orbit, use servo error signal to control, so that make the spot condition in the track, the scanning mode of track become optimum condition from the light beam of shaven head 401.In addition, also control the radial location on the CD 400 of illumination beam and the revolution of motor 402 best.

[0110]

Track address reproduction circuit 404, from from the corresponding swinging signal of extracting out shaven head 401 the reproducing signal with the track of CD 400 of wriggling, the address value of 24 bits that write down in advance by track according to Wobble signal demodulating.In addition, also detect the block unit on the track and the sync bit of sub-block unit.

[0111]

CPU405 obtains the address value with 404 demodulation of track address reproduction circuit, and the record of data and the piece of reproduction are carried out in 403 retrievals of instruction servo circuit, and in the position of the piece of retrieving, director data record-playback circuit 406 carries out operation of recording, reproducing movement.Like this, data recording/reproducing circuit 406 is control shaven head 401 just, makes it use the irradiation power irradiating laser that is suitable for operation of recording or reproducing movement.

[0112]

In addition, in the present embodiment, carry out the computing of the address value of track address reproduction circuit 404 acquisitions by CPU405., this determination processing also can be undertaken by track address reproduction circuit 404.

[0113]

During the instruction of data recording/reproducing circuit 406 receiving record data from CPU405, to the additional error correction symbol of record data, the additional data address of abideing by the form of regulation, the implementation data modulation treatment generates tracer signal.And data recording/reproducing circuit 406 is also controlled the intensity of shaven head 401 light beam, so that the moment of the sync bit that detects according to track address reproduction circuit 404, to appointed, label record that will be corresponding with tracer signal is to track.Like this, data just are recorded in the information recording layer of CD 400.

[0114]

In addition, when data recording/reproducing circuit 406 receives the instruction of reproducing data from CPU405, the moment of the sync bit that detects according to track address reproduction circuit 404, in appointed, from the reproducing signal of shaven head 401 outputs, extract the corresponding data-signal of mark that writes down with the track of CD 400 out.And data recording/reproducing circuit 406 carries out demodulation to the data of having carried out modulation in accordance with described operation of recording, and then carries out correction process also according to data-signal, the output reproducing signal.

[0115]

When data address reproducing circuit 407 carries out reproducing movement at data recording/reproducing circuit 406, the data address of adding when from the data demodulates result, extracting record data out.And data address reproducing circuit 407 also detects because the scar etc. on the track makes data-signal produce the moment skew of the data demodulates when unusual, and carries out correction constantly.

[0116]

Then, with reference to Figure 11 A, tell about the structure of the CD 400 in the present embodiment in detail.

[0117]

Figure 11 A illustrates the regional structure of CD 400.

[0118]

CD 400 comprises information recording layer.On information recording layer, form record mark, thereby make CD 400 record data.In CD 400, concentric circles ground forms track.

[0119]

CD 400 comprises BCA (Burst Cutting Area) zone 410, ingress area 420, user area 430, export area 440.

[0120]

The signal of bar code shape is write down in BCA zone 410 in advance, comprises intrinsic numbering, literary property information, dish characteristic information that every mutually different media identification of dish is used.In this dish characteristic information, comprise the number of plies of information recording layer and the identifying information of address management method.As above-mentioned dish characteristic information, for example comprise the information of the number of plies of representing information recording layer, the bit information of the regulation corresponding, the information of relevant recording density with allowing the number of plies.As the information of relevant recording density, for example can enumerate the information of the recording capacity of expression CD, the information of expression raceway groove bit long (call wire density).

[0121]

In addition, the deposit position of the information of this relevant recording density when reproducing the tailored version dish, can be considered the inside (as additional data address record to data) in BCA zone and/or record data (concavo-convex hole) etc.When appending the record type disk of type or rewriting type, then can consider BCA zone and/or PIC zone and/or swing (as the secondary information record overlapping) etc. with swing.

[0122]

User area 430 adopts the user can write down the structure of data arbitrarily.In user area 430, user data for example.In user data, comprise voice data and video data.

[0123]

Ingress area 420 is different with user area 430, adopts the user can not write down the structure of data arbitrarily.Ingress area 420 comprises PIC (Permanent Information and Control data) zone 421 and OPC (Optimum Power Calibration) zone 422 and INFO zone 423.

[0124]

In PIC zone 421, comprise the dish characteristic information.In this dish characteristic information, the number of plies, the identifying information of address management method, the access parameter of the information recording layer of telling about more than for example writing down.Access parameter for example is the related parameter that has for the laser power of a plurality of record marks of formation/cancellation in CD 400, and for the related parameter that has of the recording impulse width that writes down a plurality of record marks.

[0125]

In addition, in the present embodiment, make all tray characteristic informations of BCA zone 410 and PIC zone 421.But this is an example, and the present invention is not limited to this example.For example can make some in the inside, swing of BCA zone, PIC zone, record data, or their tray characteristic informations such as zone more than 2 arbitrarily.In addition, make the identical dish characteristic information of many places record, just can from some, read if divide.Therefore, can guarantee to coil the reliability of characteristic information.In addition, even kind the unknown of dish, optical disc apparatus is also at these pre-aligned regional tray characteristic informations, thereby can know the number of plies of the information recording layer of this dish effectively.

[0126]

In addition, when having a plurality of information recording layer, the information recording layer (key horizon) of configuration dish characteristic information for example can be the layer that is positioned at from shaven head position farthest, in other words can be to be positioned at the layer of injecting the darkest position, the surface of side from laser.

[0127]

In addition, for the only interchangeability of the machine corresponding with BD that has and pass by, the layer information of said reference layer preferably changes the form of track address, so that the same with prior art according to call wire density.

[0128]

Below, with reference to Figure 11 B, tell about this point in more detail.

[0129]

(1) of Figure 11 B illustrates the dish A of the same recording density of technology and has the structure of information recording layer of the dish B of bigger recording density, and (2) of Figure 11 B and (3) illustrate the concrete structure of the ingress area 420 of dish A and dish B respectively.

[0130]

(1) of Figure 11 B illustrates the information recording layer of certain dish.From interior all sides (left side the figure), dispose clamping zone, BCA zone 410, ingress area 420, user area 430 successively.

[0131]

(2) of Figure 11 B illustrate the concrete configuration example of the ingress area 420 of dish A.PIC zone 421 has the radius distance A of regulation from radial location 22.2mm.(3) of Figure 11 B illustrate the concrete configuration example of the ingress area 420 of dish B.PIC zone 421 has the radius distance B of regulation from radial location 22.2mm.Here, the place that is rich in feature is: the radius distance B in the PIC zone 421 of dish B, and with the identical this point of radius distance A in the PIC zone 421 of coiling A.

[0132]

In dish B, merely improve recording density, the PIC zone is 421 o'clock in recording information to, owing to the raceway groove bit long shortens, so the radius distance B in PIC zone 421 also should shorten with it with being directly proportional., in the PIC zone 421 of dish B, depositing very important information for the access of dish, PIC zone 421 can fully be reproduced.For example mechanically make shaven head move to the position of predesignating, the CD drive of reading the information in PIC zone 421 accurately, just can not reproduce after often the radius distance in PIC zone 421 shortens.To exchange in order keeping, also preferably to make radius distance B identical with radius distance A with the low level of this driver.

[0133]

As making the radius distance B method identical, for example can consider following 2 kinds of methods here, with radius distance A.The 1st kind of method is the PIC zone for dish B, the recording density that need not coil B, but with coil the method that the identical recording density of A writes down.At this moment, in ingress area, recording density also often becomes along with the zone.The 2nd kind of method is the recording density that increases with dish B, records the method for the number of times of record repeatedly of the information in PIC zone.Because record the information in PIC zone is important information, so record repeatedly in order to ensure reliability, but after at this moment not changing recording density ground and increasing repeatedly number of times (for example being increased to 7 times), also can make the radius distance A of itself and prior art equal from 5 times.

[0134]

OPC zone 422 is in order to write down or reproduce the zone of test data.Record or reproduction test data, the optical disc apparatus of access CD 400 is adjusted access parameter (for example adjusting recording power and pulse width etc.).

[0135]

INFO zone 423 the records management information of requisite user area 430 and the data that are intended to user area 430 is carried out defect management for the device of access CD 400.

[0136]

Figure 12 is that expression makes the CD of identical standard but the figure of an example of action in the startup when carrying out record-playback of every layer the different CD of recording capacity.

[0136]

At first, the CPU405 of the optical disc apparatus of Figure 10 makes the revolution rotation of motor 402 usefulness regulation.Then, the power of CPU405 usefulness regulation to CD 400 irradiating lasers, uses servo circuit 403 to follow the tracks of and focus control from shaven head 401.

[0138]

In step S1, move in CPU405 constructs to physical property shaven head 401 near the interior week at CD 400 BCA zone 410 or PIC zone 421.CPU405 obtains the address value with 404 demodulation of track address reproduction circuit, the position of instruction servo circuit 403 retrieval reproduction dish characteristic informations, and instruction is read the dish characteristic information from this position.

[0139]

According to this instruction, data recording/reproducing circuit 406 is read the dish characteristic information, according to the dish characteristic information of reading, and the identifying information of the information reproduction record number of plies and address management method.

[0140]

In step S2, CPU405 is according to above-mentioned dish characteristic information, and identification is the dish which kind of recording density is used.

[0141]

For example: when the CD that the CPU405 differentiation is packed into is xGB, enter step S3; When the CD that differentiation is packed into is yGB, enter step S4.

[0142]

In step S3, the address administration rule that CPU405 uses according to the CD of xGB is set CPU405, so that can identification layer information and block address information.

[0143]

On the other hand, in step S4, the address administration rule that CPU405 uses according to the CD of yGB is set CPU405, so that can identification layer information and block address information.

[0144]

The layer information of recording capacity separately and the recognition methods of block address information, with tell about with above-mentioned Fig. 2 the same.

[0145]

In other words, during xGB, with a high position 3 bits in block address message address 24 bits as layer information bit identification, with thereafter 19 bits as the identification of block address information bit, with low level 2 bits as number identification of sub-piece.On the other hand, during yGB, with a high position 2 bits in block address message address 24 bits as layer information bit identification, with thereafter 20 bits as the identification of block address information bit, with low level 2 bits as number identification of sub-piece.X=25 for example, y=33.

[0146]

In step S3, observe address administration rule according to the call wire density distribution, current address is correctly discerned bare headed 401 present positions again, makes shaven head 401 move to the position of regulation, finishes a series of processing of startup.

[0147]

Before identification dish characteristic information, 450 pairs of the optical disc apparatus layer different with described key horizon focus on and follow the tracks of, when reading address information, because the configuration difference of layer information and block address information, so might be to the address information differentiation that makes mistake.For fear of this situation, can guarantee middle layer between the layer of described key horizon and other greater than other middle layer, prevent that the erroneous judgement that layer differentiates is other.For example adopt the angle from laser, the L0 layer of the key horizon in the standard of 2 layers of correspondence of BD is positioned at the degree of depth of about 100um, and the L1 layer is positioned at the structure of the degree of depth of about 75um.In the present invention, for the recording layer that prevents to introduce, can adopt to make later close the laser side of L1 layer formation than the close more laser side of 75um to the mistake of L1 layer.For example make the L1 layer be positioned at the position of 70um.If strengthen the width (thickness) in the middle layer between key horizon and the L1 layer too terrifically, the width in the middle layer that just is difficult to guarantee that fully the L2 layer is later.Therefore, need can be not guarantee the balance of width in the middle layer of other layer to the mistake of L1 layer with introducing.

[0148]

In addition, in the telling about of above-mentioned embodiment, enumerated the object lesson of address format of the data address of the address of record in advance and record, but the present invention is not limited thereto.

[0149]

In addition, in the telling about of above-mentioned embodiment, told about the situation of the address value of wriggling (swing) record for track that utilizes track, but the present invention is not limited thereto, can utilize the bit between the track, the bit on the track to realize.

[0150]

In addition, in the telling about of above-mentioned embodiment, enumerated the example of the optical disc apparatus for can the CD of record data, but also can be the optical disc apparatus for the CD that can only reproduce the data of record in advance.

[0151]

In addition, the inscape of optical disc apparatus of the present invention can be used as integrated circuit---and LSI realizes.The inscape that optical disc apparatus possesses, both chipization individually also can comprise the chipization in some or all of ground.

[0152]

Here, integrated circuit is called " LSI ", still, also often is called IC, LSI, super LSI etc. according to the difference of integrated level.

[0153]

In addition, integrated circuit of the present invention is not limited to LSI, can also realize by special circuit or general processor.Also can utilize and make the FPGA (Field ProgrammableGate Array) that programs behind the LSI and the connection of the circuit unit that can reconstitute LSI inside and the reconfigurable processor of setting.

[0154]

And then, if be accompanied by the progress of semiconductor technology, or under the influence of other technology that derives from, after the technology of the integrated circuit of displacement LSI is come out, can certainly use this technology to carry out the integrated of functional block.All right Applied Biotechnology etc.

[0155]

Last in addition, for a example as CD of the present invention---BD (blue laser disk), replenish simply and tell about.About the main optical constant and the physical format of blue laser disk, can referring to the homepage of " blue laser disk reader " (ohm society publish) and blue laser association ( Http:// www.bluOn-the blank sheet of paper (white paper) that raydisc.com) publishes.

[0156]

In BD, using wavelength 405nm (if the allowable value that makes error range is ± 5nm, then is 400～410nm) laser and the lens of NA=0.85 (if making the allowable value of error range is ± 0.01, then being 0.84～0.86).Track space is 0.32 μ m, the raceway groove clock frequency is 66MHz (66.000Mbit/s) in BD standard transmission speed (1X), be 264MHz (264.000Mbit/s) in the transmission speed at BD4X, be 396MHz (396.000Mbit/s) in the transmission speed at BD6X, be 528MHz (528.000Mbit/s) in the transmission speed at BD8X.Standard lines speed (datum line speed, 1X) is 4.917m/sec).

[0157]

Thickness about protective seam; be accompanied by the raising of numerical aperture; the shortening of focal length; influence for the distortion of the luminous point that suppresses to tilt to cause; can adopt the protective seam thinner than the 0.6mm of DVD; when for example the gross thickness of medium is the 1.2mm left and right sides; the thickness that makes protective seam be 10～200 μ m (more particularly; in the substrate about 1.1mm; if single-layered disk just adopts the protective clear layer about 0.1mm, if two layers of dish; just on the protective seam about 0.075mm; add the middle layer (Spacer Layer) about 0.025mm, if the dish more than three layers then makes the further attenuation of thickness in protective seam and/or middle layer).

[0158]

In addition, in order to prevent that so thin protective seam is damaged, can lug boss be set in the outside or the inboard of retaining zone (ClampArea).When particularly being provided with in the inboard of retaining zone; except preventing from protective seam damaged; also owing to have lug boss at position near the center pit that coils; so can alleviate load that the weight balancing of lug boss causes, for turning axle (motor); be positioned at for access retaining zone the outside information recording area and after the inboard of retaining zone is provided with lug boss, can avoid lug boss and the shaven head conflict.

[0159]

And, when being provided with, be that position concrete in the dish of 120mm can be as follows for example at external diameter in the inboard of retaining zone.The diameter of supposing center pit is the diameter of 15mm, retaining zone in the scope of 23mm～33mm the time, just promptly in the scope of diameter 15mm～23mm lug boss is being set between center pit and the retaining zone.At this moment, both can be to the distance (for example the acies from center pit leaves (and/or 0.125mm below) more than the 0.1mm) that is provided with between the center pit to a certain degree, also can be to setting distance (for example leaving (and/or below 0.2mm) more than the 0.1mm) to a certain degree between the retaining zone from the inner of retaining zone.In addition, can also (as position particularly, for example can in the scope of diameter 17.5mm～21.0mm lug boss be set) be set on to a certain degree the distance ground of separating between the two to the inner of the acies of center pit and retaining zone.In addition, as the height of lug boss, can take all factors into consideration and be not easy protective seam is damaged and take up easily back decision.If but too highly perhaps can produce other problem, be the height below the 0.12mm so can adopt to count from retaining zone.

[0160]

In addition, about the stacked structure of multilayer, for example as after injecting the single-sided discs of laser reconstruction and/or recorded information from protective seam one side, making recording layer is more than 2 layers the time, and a plurality of recording layers are set between substrate and protective seam.Can make sandwich construction at this moment become following sample attitude.In other words, injecting the most inboard position that face works the distance that separates regulation with light, key horizon (L0) is set, stacked (L1, L2, with from the key horizon to light, injecting face increase layer ..., Ln), also make from light and inject the distance of face, inject face with the light from single-layered disk and equate (for example about 0.1mm) etc. to the distance of recording layer to key horizon.In addition, so-called here " key horizon ", said with preamble " key horizon " is different, and nonessential existence dish characteristic information.Undoubtedly, also can so-called here " key horizon " middle configuration dish characteristic information.

[0161]

Like this, after irrespectively making distance till the innermost layer certain with the quantity of layer, can keep the relevant interchangeability of access for key horizon, in addition, though the influence that the innermost layer is also tilted, but can not be accompanied by the increase of the number of plies and increase to the distance of innermost layer, so the influence that can suppress to tilt increases along with the increase of the number of plies.After the zone of the information deposit previously described dish characteristic information and the relevant recording density that is comprised by it is set at least, can guarantee interchangeability for reading also of these information in key horizon.

[0162]

In addition, direct of travel/reproduction direction about luminous point, for example both can be identical in all layers, promptly in all layers, carry out carrying out from the peripheral direction parallel transmission of Zhou Fangxiang inwardly from interior Zhou Fangxiang towards the periphery direction or all layers, also can transmit on the contrary and (make key horizon (L0) carry out direction when transmitting from interior all sides towards outer circumferential side, in L1, carry out from the outer circumferential side direction transmission of all sides inwardly, promptly in Lm (m be 0 and even number), carry out direction when transmitting from interior all sides towards outer circumferential side, in Lm+1, carry out from the outer circumferential side direction transmission of all sides inwardly (when carrying out among Lm (m be 0 and even number) perhaps from outer circumferential side that the direction of all sides is transmitted inwardly, in Lm+1, carry out direction transmission) from interior all sides towards outer circumferential side, during each in this wise switchable layer, it is opposite to reproduce direction).

[0163]

Then, tell about the modulation system of tracer signal simply.With data (original source data/modulation before binary data) when recording on the recording medium, be partitioned into the size of regulation, be partitioned into regulation size data so that be divided into the frame of the length of regulation, every frame is inserted into the synchronizing code/synchronizing symbol series (frame synchronization zone) of regulation.The data that are divided into frame, the modulating rule that is used as the regulation of abideing by the record-playback characteristics of signals that meets recording medium has been carried out serial write down (the frame data zone) of data symbol of modulation.

[0164]

Here, as modulating rule, can be long confined RLL (Run LengthLimited) coded system of mark, souvenir is that (d in the time of k), means the 0 minimum d of being that occurs to RLL between 1 and 1, mostly be k (d and k are the natural numbers that satisfies d＜k) most.For example when d=1, k=7, after the reference period of T, just become the shortest 2T, the record mark and at interval of the longest 8T as modulation.In addition, can also as so that interpolation has a feature of following [1] [2] on RLL (1,7) modulation 1-7PP modulate.The what is called of 1-7PP " PP ", it is the abbreviation of Parity preserve/ProhibitRepeated Minimum Transition Length, [1] initial P---Paritypreserve, the odd even (being Parity) of number of " 1 " that means the source data bit before the modulation is with consistent with the odd even of number of " 1 " of bit pattern after its corresponding modulation; [2] P of back---Prohibit Repeated Minimum Transition Length, mean the shortest mark on the wave recording after the restriction modulation and the structure of the number of occurrence at interval (specifically, the number of occurrence restriction with 2T becomes till maximum 5 times).

[0165]

On the other hand, because in synchronizing code/synchronizing symbol series of inserting interframe, do not adopt the modulating rule of afore mentioned rules, so can comprise the long pattern in addition of the symbol that is limited by this modulating rule.Because the reproduction processes data constantly the during data that this synchronizing code/synchronizing symbol series is the decision reproduction to be write down are not so can comprise following pattern.

[0166]

Say on the viewpoint of calm data symbol series easy to identify, in data symbol series, can comprise absent variable pattern.For example be long mark or interval and this mark or the number of occurrence at interval in longest mark/interval that comprises than data symbol series.Modulation system is 1-7 when modulation, is 2T～8T because mark and length at interval are constrained to, so be than the mark more than the long 9T of 8T or at interval and the number of occurrence at 9T mark/interval etc.

[0167]

On the viewpoint of processing such as introducing synchronously easily, can also comprise the pattern of the migration that produces many marks/interval.Relatively shorter mark or at interval and this mark or the number of occurrence at interval in the mark/interval that is comprised by data symbol series for example.When modulation system is the 1-7 modulation system, be the mark of the shortest 2T or at interval and the number of occurrence at 2T mark/interval, and the number of occurrence at the mark of next the shortest 3T or interval and 3T mark/interval etc.

[0168]

Temporarily be called " frame zone " if will comprise the zone of above-mentioned synchronizing symbol series and data symbol series, the unit that will comprise a plurality of (for example 31) this frame zone temporarily is called " group of addresses (AddressUnit) ", so just can be in certain group of addresses, make the synchronizing symbol series that comprised by the zone of frame arbitrarily of this group of addresses and this arbitrarily the intersymbol distance of the synchronizing symbol series that comprises of the frame zone beyond the frame zone be more than 2.Here, so-called " intersymbol distance ", when being meant 2 series of symbols of comparison, the number of the different bit in the series of symbols.Make in this wise intersymbol distance be more than 2 after, even because the The noise when reproducing etc., the bit displacement errors appears in a series of reading, and also can not be identified as another by mistake.In addition, the intersymbol distance that can also make the synchronizing symbol series that the frame zone of the front that is positioned at this group of addresses comprises and be positioned at the synchronizing symbol series that the frame zone beyond the front comprises is more than 2.Like this, just can discern at an easy rate is the position, front, is the separately position of group of addresses.

[0169]

In addition, intersymbol distance comprising the situation of when NRZ writes down, carrying out NRZ souvenir series of symbols, the meaning of the intersymbol distance in the situation of when NRZI writes down, carrying out NRZI souvenir series of symbols.Therefore, if when adopting the record of RLL modulation, because this what is called " RLL " is the data of the number that means that high level on the wave recording that is limited in NRZI or low level signal continue, so mean that the intersymbol distance in the NRZI souvenir is more than 2.

[0170]

The present invention is of great use as the method for the recording capacity of information recording carriers such as increase CD.The track address of the address format configuration information recording medium of the number of plies of enough suitably controlling recording line densities of energy and information recording layer, construct the optical disc record reproducing system corresponding with this address format, thereby the interchangeability that can keep the optical disc record reproducing system of back prior art on one side is Yi Bian realize stable recording/reproducing system.In addition, because the disposal route of the value of the numerical information of only change reproducing just can be corresponding, so do not need to change significantly hardware, the complicated and hardware size that can prevent locking system increases and the cost increase that causes.Can in jumbo CD media, optical disc apparatus, optical disc record reproducing method and integrated circuit, utilize.

Claims (20)

1, a kind of CD possesses the information recording layer that comprises concentric circles or spiral helicine track,

Described CD has to be used for recording and narrating and is recorded in form on the described track or that be attached to the track address in the data that described information recording layer writes down in advance,

Described form comprises the layer information of relevant described information recording layer and the address information of relevant described track address;

In having the 1st CD of the 1st recording density,

Record and narrate the layer information of described the 1st CD with the 1st bit number,

Record and narrate the address information of described the 1st CD with the 2nd bit number;

In the 2nd CD with the 2nd recording density bigger than described the 1st recording density,

Determine the layer information of described the 2nd CD with the bit number that lacks than described the 1st bit number,

Determine the address information of described the 2nd CD with the bit number of Duoing than described the 2nd bit number;

The total bit number of the layer information of described the 2nd CD and the address information of described the 2nd CD equals described the 1st bit number and described the 2nd bit number sum.

2, CD as claimed in claim 1 is characterized in that: described CD is read-only type; Described data form with concavo-convex hole.

3, a kind of method of reproducing the described CD of claim 1 comprises:

Reproduce described layer information step and

Reproduce the step of described address information.

4, a kind of CD possesses information recording layer,

In described information recording layer, predesignate and be useful on record and write down form in orbit or that be attached to the track address in the data in advance;

Described information recording layer comprises the zone of depositing about the recording density of described information recording layer;

Described form comprises the layer information of relevant described information recording layer and the address information of relevant described track address; Described layer information is recorded and narrated with the 1st bit number; Described address information is recorded and narrated with the 2nd bit number;

When the information of relevant described recording density surpasses setting, record and narrate described layer information with the bit number that lacks than described the 1st bit number, record and narrate described address information with the bit number of Duoing than described the 2nd bit number, and the total bit number of described layer information and described address information, equal described the 1st bit number and described the 2nd bit number sum.

5, CD as claimed in claim 4 is characterized in that: the CD that is to use the different multiple label record data of length;

The frequency spatial frequency of the reproducing signal when reproducing some at least mark in the described multiple mark is higher than the OTF cutoff frequency.

6, CD as claimed in claim 4, it is characterized in that: the Wavelength of Laser to track irradiation be λ nm, with the numerical aperture of the object lens of laser focusing to track be NA, in orbit the shortest mark of record long for TMnm, the shortest interval long during for TSnm, (TM+TS)＜λ ÷ (2NA) then.

7, CD as claimed in claim 6 is characterized in that: the length T M+TS of long TM of the shortest described mark and the long TS addition in the shortest described interval, and less than 238.2nm.

8, CD as claimed in claim 6 is characterized in that: the multiple mark that can write down modulating rule modulation according to the rules;

When making the reference period of described modulation be T,

The shortest described mark length is 2T, and the shortest described interval length is 2T.

9, CD as claimed in claim 6 is characterized in that: the multiple mark that can write down modulating rule modulation according to the rules;

The modulating rule of described regulation is the 1-7 modulating rule.

10, CD as claimed in claim 4 is characterized in that: the information of relevant described recording density is the information of the recording capacity in the described information recording layer of expression.

11, CD as claimed in claim 10 is characterized in that: the value of described regulation is 25 GB.

12, CD as claimed in claim 4 is characterized in that: the information of relevant described recording density is the information of the call wire density in the described information recording layer of expression.

13, CD as claimed in claim 4 is characterized in that: the width of the track that described information recording layer is provided with is identical, allows multiple recording density.

14, CD as claimed in claim 4 is characterized in that: described address information and described layer information, and utilize the swing of described track to represent, perhaps record and narrate inside in the data of described record;

Represent described layer information bit string, compare, be configured in a high position with the described address information Bit String of expression.

15, CD as claimed in claim 4 is characterized in that: possess BCA zone and ingress area; In described ingress area, comprise the PIC zone;

In described BCA zone or described PIC zone, the information of the relevant described recording density of record.

16, a kind of method of reproducing the described CD of claim 15,

Comprise from described BCA zone or described PIC zone, reproduce the step of the information of relevant described recording density.

17, CD as claimed in claim 4 is characterized in that: possess:

Be configured in information recording layer and be from photoirradiated surface position farthest key horizon,

Be configured in than described key horizon near the information recording layer of described photoirradiated surface side promptly the 1st information recording layer and

The middle layer that is configured between described key horizon and described the 1st information recording layer is the 1st middle layer;

Described key horizon comprises the zone of depositing about the information of described recording density.

18, CD as claimed in claim 17 is characterized in that: possess:

Be configured in than described the 1st information recording layer near the information recording layer of described photoirradiated surface side promptly the 2nd information recording layer and

The middle layer that is configured between described the 1st information recording layer and described the 2nd information recording layer is the 2nd middle layer;

The width in described the 1st middle layer is greater than the width in described the 2nd middle layer.

19, a kind of optical disc apparatus, can to the described CD of claim 15 carry out the record of data and reproduce at least a, possess:

Output unit, this output unit are to described CD illumination beam, and the output reproducing signal corresponding with catoptrical light quantity;

The 1st reproduction units, the 1st reproduction units reproduce the information of relevant described recording density from described BCA zone or described PIC zone;

The 2nd reproduction units, the 2nd reproduction units reproduce described layer information and described address information according to described reproducing signal; With

Recognition unit, this recognition unit are used the described layer of the bit number identification information of lacking than described the 1st bit number according to the information of the relevant described recording density of being reproduced by described the 1st reproduction units, use the bit number of Duoing than described the 2nd bit number to discern described address information;

According to described layer information and the described address information that bit number is discerned after changing, carry out the record of data and reproduce at least a.

20, a kind of control device is packed into and can be carried out the record of data and at least a optical disc apparatus in the reproduction to the described CD of claim 15,

Described control device possesses:

The 1st reproduction instruction unit, the instruction of the 1st reproduction instruction unit reproduce the information of relevant described recording density from described BCA zone or described PIC zone;

The 2nd reproduction instruction unit, the 2nd reproduction instruction unit are according to the reproducing signal from described CD, and described layer information and described address information are reproduced in instruction; With

Recognition unit, this recognition unit is according to the information of the relevant described recording density of being reproduced by described the 1st reproduction instruction unit, with the described layer of the bit number identification information of lacking than described the 1st bit number, use the bit number of Duoing to discern described address information than described the 2nd bit number.

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