CN1334563A - Access method for high-capacity optical disk record format - Google Patents

Abstract

The invention discloses a method to access record format used in high capacity optical disc. The time information that expresses data or its position in time length is divided into two parts: MSF part and E part. The format and access mode in MSF part is the same as the one in existence. In addition, E part expresses minutes in the fourth digit and it is separately stored from MSF part. When system needs the said time information, the MSF part and E part are read out individually and put into storage. Combining the two parts will output the integrated EMSF time information. The invention can express minutes in the fourth digit by using the E part, moreover it is compatible with all of CD formats backward.

Description

The access method of high-capacity optical disk record format

The present invention is the access method of relevant a kind of optical disk record format, particularly, about a kind of and CD CD compatibility, and can be applicable to the record format and the access method of high-capacity CD-ROM.

A kind of form of service time unit has been applied in the optical disk system of general music CD (CD-DA), video disc (Video CD or VCD), super video compact disc (Super VCD or SVCD), read-only optical disc (CD-ROM), compact disc rocordable (CD-R) and rewritable optical disc forms such as (CD-RW) at large.The content of this kind time format comprises three parts: divide (minute), second (seciond) and sector (frame or block or sector), and the pattern that can be write as mm:ss:ff is usually expressed, wherein had 60 seconds in 1 minute, and divided into 75 sectors in 1 second.Pattern by mm:ss:ff be it seems, use 6 (digit: promptly in the form, numeral, or figure place) binary-coded decimal (binary-coded decimal) is represented above-mentioned minute, second and sector respectively, just binary digit is respectively expressed with 2 by every kind of unit, each figure place is respectively distributed the length of 4 (bit: promptly, numerical digit) again, therefore occupies 24 altogether.

Above-mentioned unit form can be used to indicate the address of the time span or the data of data of optical disk, and the reproduction time of for example a certain music or track of video (track) is 5 minutes 16 seconds 30 sectors, can be write as 05:16:30; The reference position of another music or track of video is 23:45:67 again, represents that then this track of video is that we are generally called this expression way was the MSF representation since 23 minutes 45 seconds 67 sectors.

In Q passage (channel Q), sector format Head Section and some file layouts in present disk format, can use the MSF representation of this 6 kinds of first binary-coded decimals (24), but this MSF representation has a restriction, is exactly that the passable maximal value of MSF can be limited in 99 minutes 59 seconds 74 sectors (99:59:74).Though the capacity of at present general CD format disc can not surpass the upper limit of this representation, the CD of for example general 680 megabits (Mega Bytes) holds 74 minutes the music data (CD-DA) or the video data (SVCD) of 37 fens kinds usually at most, that is to say that the interior MSF value of disc is at most by 74 minutes.But the development trend with current information recording medium heading high storage density it seems that the utilization of huge capacity compact discs should be within sight.If will produce in the future the high-capacity CD-ROM that surpasses 100 fens kinds, and disc formats again with existing C D format compatibility, the MSF representation of then known this 6 binary-coded decimals (24) is just because of representing " hundred figure places of branch " not enough use.

In view of this, purpose of the present invention just provides a kind of temporal information representation of high-capacity CD-ROM data, represents the problem of hundred figure places of branch at least in the record format to solve, and with known CD optical disk system compatibility.

Purpose according to the invention described above, a kind of access method of high-capacity optical disk record format is provided, be outside the MSF representation of original expression branch (Minute), second (Second), sector (Frame), the E part that more other increase is at least one, more than hundred figure places of dividing in order to expression, and it is stored among the end or specific file of Q passage (Channel Q), Head Section, original.When the system for the treatment of needs time span to be Data Position equal time information, read above-mentioned MSF part and E part more separately, and in storer, merge and be output as an EMSF temporal information, so, by means of the disclosed technology of the present invention, not only can break through original MSF representation and can't represent the restriction of hundred figure places of branch, can also reverse and all CD format compatibles.

In addition, in other embodiments of the invention, can also utilize 2 idle in original 24 MSF representations, the position as storing the E part makes and must not look in addition under the situation of storage location, also can reach the purpose of hundred figure places of expression branch.

For above-mentioned and other purposes of the present invention, characteristic and advantage can be become apparent, several preferred embodiments cited below particularly, and in conjunction with the accompanying drawings, be described in detail below.

Fig. 1 represents the data structure synoptic diagram (" every minute and second sector " with one 7 of 26 bit representations is example) of first embodiment of the invention;

Fig. 2 represents the E among Fig. 1 is partly deposited in the data structure synoptic diagram of Q passage;

Fig. 3 represents the E among Fig. 1 partly is stored in the data structure synoptic diagram of the Head Section in the disk format;

Fig. 4 represents that the present invention reads file to obtain the process flow diagram of whole EMSF information;

Fig. 5 represents the data structure synoptic diagram of second embodiment of the invention;

Fig. 6 A represents the data structure synoptic diagram of third embodiment of the invention;

Fig. 6 B represents the data structure synoptic diagram of fourth embodiment of the invention;

Fig. 7 A represents the data structure synoptic diagram of fifth embodiment of the invention; And

Fig. 7 B represents the data structure synoptic diagram of sixth embodiment of the invention.

Please refer to Fig. 1, it is for the data structure synoptic diagram of first kind of embodiment of the present invention.For can with existing disk format compatibility such as CD-DA, VCD, SVCD, CD-ROM, CD-R and CD-RW, therefore the present invention is outside existing MSF part 20, increase by an E part 10 in addition, be referred to as the EMSF temporal information, and the EMSF temporal information is represented one at least 7 (Digit) " every minute and second sector " time with at least 25.

Above-mentioned MSF part 20 is the existing recorded form, it comes express time information with 6 binary-coded decimal (24), wherein also include 8 S part 22 of 21,8 of M parts and 8 F part 23, in order to branch (Minute), second (Second) and sector (Frame) that represents two (i.e. two figure places) respectively; In addition, 10 of E parts are in order to the part more than hundred figure places of expression branch, with Fig. 1 is example, suppose that E part 10 has 2, if also use 2 binary numbers, then E part 10 multipotencys are represented metric digital 3 (binary number 11), add aforementioned 24 MSF part 20, therefore, the maximal value that can represent of EMSF temporal information is 399 minutes 59 seconds 74 sectors (399:59:74).

Though above-mentioned exemplary is that E part 10 is set at 2, scale-of-two, when the present invention was applied to optical disk system, E part 10 employed positions, system even its coded system all were not limited thereto example.For instance, if when representing with 3, scale-of-two and metric corresponding relation are:

Binary to decimal

001------------------->1

010------------------->2

100------------------->4

If change scale-of-eight into above 3, then its expressed metric meaning is:

The scale-of-eight decimal system

001------------------->1

010------------------->8

100------------------->64

In like manner, the user also can be optionally and adopt sexadecimal, and the corresponding relation between it and the decimal system is:

The sexadecimal decimal system

001------------------->1

010------------------->16

100------------------->256

In addition, even the user can not adopt known coded system, if be example with 2, scale-of-two, the user can change its Methods for Coding as required, lifts following several example that is now:

(1) binary to decimal (2) binary to decimal

00--------------->0????00--------------->0

01--------------->1????01--------------->2

10--------------->2????10--------------->1

11--------------->3????11--------------->3

(3) binary to decimal (4) binary to decimal

00--------------->0????00--------------->3

01--------------->1????01--------------->2

10--------------->3????10--------------->1

11--------------->2????11--------------->0

Because the restriction of existing form, so E part 10 can't deposit in the adjacent part of MSF part 20, must look for its place to store in addition; But the present invention can read E part 10 and MSF part 20 respectively by the program in hardware or the software, remerges later on and obtains a complete EMSF temporal information, therefore there is no obstruction.

As for the position of depositing E part 10, can under existing specification, do suitable selection, to keep its compatibility.The place that generally can use temporal information includes: (1) Q passage (ChannelQ); (2) Head Section in the sector format; And (3) some specific file, for example on the disc of SVCD, the INFO in the SVCD catalogue, ENTRIES, TRACK and SEARCH.DAT etc., and the SCANDATA.DAT in the EXT catalogue.

Seeing also Fig. 2, is that the configuration scenario with E part 10 among Fig. 1 is an example, and the mode of depositing E part 10 in Q passage 30 is described.Usually the MSF temporal information 20,20 ' that has a group or two groups in the Q passage 30, if with two groups is the example explanation, the present invention utilizes two groups of MSF temporal informations 20,20 ', if with two groups is the example explanation, the present invention is the ZERO district 31 (having 8) that utilizes two groups of MSF temporal informations 20,20 ' centre, as depositing E part 10 parts.Because the E part 10 among Fig. 1 has 2, therefore then need 4 altogether if will represent secondary MSF temporal information 20,20 ' E part 10,10 ', for example shown in Fig. 2, can choose b6b7 (the 7th and the 8th position) and deposit first group E part 10, and deposit second group E part 10 ' with b4b5 (the 5th and the 6th position).May use above-mentioned method, E part 10 is stored in the CD specification in the ZERO district 31 of Q passage 30, include CD-DA, VCD, SVCD, CD-ROM, CD-R and CD-RW etc.; But it should be noted: represented just exemplary among Fig. 2, can determine by situation during practical application to use in 8 ZERO districts 31 which and how to use.

Please refer to Fig. 3, is example with the configuration scenario of E part 10 among Fig. 1, and the mode of depositing E part 10 in the Head Section 35 in sector format is described.Show among the figure and have 4 hytes altogether by Head Section 35 (Byte: byte), remove to have now and deposit 3 hytes of MSF part 20, other has a pattern hyte 36 (Mode Byte).Therefore we can be stored in E part 10 among the guard position of pattern hyte 36, for example b2b3 (the 3rd and the 4th position).May use said method, E part 10 is stored in the CD specification of the pattern hyte 36 of Head Section 35, include VCD, SVCD, CD-ROM, CD-R and CD-RW etc.It should be noted equally: represented also typical case just among Fig. 3, can be according to circumstances during practical application and decision is used which position in the guard position and how to be used.

As for utilizing file to store the mode of E part 10, be because of different file layouts, the number of the MSF part 20 that it write down may be different, and different CD contents, and the number of the MSF part 20 that is write down in its file also may be different.In addition, the original file format space some will be not enough to add newly-increased E part 10.Based on above-mentioned these reasons, so the present invention selects the 20 pairing E parts 10 of the MSF part in each file are deposited in the new file, and this new file is placed relevant catalogue, or according to circumstances that it is corresponding E part 10 to deposit in the end of original good.E part 10 may be stored in the CD specification of file, include VCD and SVCD etc.

If with the specification of SVCD is example, can use the file relevant with MSF part 20 has INFO, ENTRIES, TRACK and SEARCH.DAT etc. in the SVCD catalogue and the SCANDATA.DAT in the EXT catalogue.Therefore, the present invention can be chosen in and set up two files in the SVCD catalogue, and one of them file name is EMSF1, is used for depositing each MSF part 20 pairing E part 10 of file such as INFO, ENTRIES and TRACK.Another file name is EMSF2, is used for depositing each MSF part 20 pairing E part 10 of SEARCH.DAT.In addition, in the EXT catalogue, set up the file that a name is called EMSF3 in addition, be used for depositing each MSF part 20 pairing E part 10 of SCANDATA.DAT.But similarly, above-mentioned expression mode is a typical case also, can according to circumstances determine the number of file and the title of file during practical application.

The file structure of the EMSF1 file among above-mentioned can be with reference to as shown in table 1.In the specification of SVCD, INFO file only " segmentation playitems playitem start address " place need use MSF part 20.And the ENTRIES file is up to inlet 1 to inlet 500, therefore needs 500 entry addresses to use the MSF representation at most.At last, the TRACK file then has N track reproduction time can use the MSF representation, and wherein N represents the actual track number.Though the length of above-mentioned each E part still can be assumed to be 2, for convenience's sake, then all deposits it with 8 (1 hyte) in the table 1.

Relative hyte position	Length (hyte)	Zone name	Explanation
				?1	????1	E part physical length (L)	Figure place
?2	????1	Track number (N)	Numerical value of N
				?3-4	????2	The actual entry number
?5	????1	Segmentation playitems playitem start address	The E part of start address in the INFO file
				?6-8	????3	Standby	????;$00
?9-508	????500	The entry address	The E of entry address part in the ENTRIES file (8 of each inlets)
				?509-512	????4
?513-512＋N	????N	The reproduction time of track	The E of reproduction time part (8 on each track) in the TRACK file
				?513＋N-2048		Standby	????$00

Table 1

The file structure of the EMSF2 file among above-mentioned can be with reference to as shown in table 2.In the SEARCH.DAT file, have N analyzing spot, 1≤N≤32767 wherein, the sevtor address of each analyzing spot all needs to store an E part 10, in order to cooperate with original MSF part 20.If each E part 10 is set at the L position, then need the N*L position altogether, with for the purpose of the saving space, also be that unit is deposited for convenient with the hyte.Therefore, if N*L is not 8 multiple, the integral part of then getting N*L/8 adds 1 hyte again, and the redundant bit of last hyte is then supplied it with 0.In addition, the sum of hyte number also is recorded among the table 2.

Relative hyte position	Length (hyte)	Zone name	Explanation
					1	1	E part physical length (L)	Figure place
2-3	2	Number of scan points (N)	Numerical value of N
				4-5	2	Data length	Hyte sum BN (notes)
6-5+BN (notes)		The sevtor address of analyzing spot	(L*N altogether of E partial data among the SEARCH.DAT file, with the hyte is unit, not enough in 0 benefit.)

Annotate: if L*N is 8 multiple, then BN=L*N/8; Otherwise BN=L*N/8 round numbers part+1

Table 2

The file structure of the EMSF3 file among above-mentioned can be with reference to as shown in table 3.Comprising the data of E part 10 of sevtor address etc. of SCANDATA.DAT file middle orbit cumulative time and analyzing spot, its recording mode and table 2 are similar.In addition, for the ease of reading of data, data reference position and length have also been added.

Relative hyte position	Length (hyte)	Zone name	Explanation
					1	1	E part physical length (L)	The position
2-3	2	Number of scan points (N)	Numerical value of N
				4-5	2	Number of scan points is according to reference position
6-7	2	The analyzing spot data length	Hyte is counted BN (annotating 1)
				8	1	Track number (T)	Numerical value T
9-10	2	The orbital data reference position
				11-12	2	Orbital data length	Hyte is counted BN (annotating 2)
13-12+BT (annotating 2)		The accumulative total of track shows the time	(L*T altogether of E partial data, with the hyte is unit, not enough in 0 benefit.)
				13+BT-12+ BT+BN (annotating 1 and 2)		The sevtor address of analyzing spot	(L*N altogether of E partial data, with the hyte is unit, not enough in 0 benefit.)

Annotate 1: if L ^*N is 8 multiple, then BN=L ^*N/8; Otherwise BN=L ^*The integral part of N/8+1.

Annotate 2: if L ^*T is 8 multiple, then BT=L ^*T/8; Otherwise BT=L ^*The integral part of T/8+1.

Table 3

Understand how to store E part 10 with and form after, please refer to Fig. 4, it reads file to obtain the process flow diagram of whole EMSF information for the present invention.At first,, just can know that general CD still is high-capacity CD-ROM (step 401),, then continue this flow process, get final product with the known method processing otherwise jump out this flow process if judged result is a high-capacity CD-ROM by the system identification and the standard version number of CD.Above-mentioned be judged as certainly after, set earlier and deposit the memory area (step 402) of merging into the EMSF temporal information.Read the MSF part 20 among the optical file then, and be stored in the correspondence position (step 403) among the above-mentioned storer.If its time information has E part 10 (step 404), then read the E part 10 in the CD respective file, simultaneously it is stored in the correspondence position (step 405) among the above-mentioned storer, remerge the complete EMSF temporal information (step 407) of output, otherwise just the E part 10 among the storer is set at 0 (step 406), again the EMSF temporal information (step 407) of output merging.

Except that above-mentioned mode, can also utilize the idle position in the original MSF representation, as storing E part 10 parts with E part 10 and MSF part 20 separate storage.Please refer to Fig. 5, it is the data structure synoptic diagram of second embodiment of the invention.Because S part 22 and F part 23 in the known MSF representation, its maximal value respectively is 59 (seconds) and 74 (sectors), it seems with the situation of using 2 (8) binary-coded decimals to represent separately, S part 22 all is " 0 " with last position of F part 23 forever, just all in idle state, as follows:

S part F part

The decimal system 59 74

Binary Zero 101 1,001 0,111 0100

Thus, the present invention can divide into 1 E with 2 E part 10 among Fig. 1 ₁ Part 11 and 1 's E ₂Part 12, and deposit in respectively among the above-mentioned idle position, merging taken out when need waiting again respectively.Perhaps, and then shown in Fig. 6 A and Fig. 6 B, S part 22 and F part 23 all are reduced to 7 positions (still being 2), and transfer its position, make that M part 21.S part 22 is still together adjacent with F part 23, and allow script be used to store 24 2 of vacating front or back of MSF part 20, deposit E part 10 parts to be used as.Because in the 2. 3rd and the 4th embodiment, all be to utilize the idle position of existing MSF part 20 to deposit E part 10, the storage location of therefore certain E part 10 is all identical with aforesaid MSF part 20.

Please refer to Fig. 7 A and Fig. 7 B, the present invention also can only adopt E wherein under the framework of Fig. 5 ₁ Part 11 or E ₂Part 12 that is to say and also can only use 1 position to store hundred figure places of dividing.Wherein, the user can be shown in Fig. 7 A, only selects the idle position (E just with S part 22 ₁Partly 11), or shown in Fig. 7 B, only select idle position (E just with F part 23 ₂Part 12), no matter be above-mentioned which kind of selection mode, but the maximal value of its express time information all is 199 minutes 59 seconds 74 sectors.

The present invention utilizes additional storage-E part, the mode that partly merges with original MSF again, not only can with disk format compatibilities such as known CD-DA, VCD, SVCD, CD-ROM, CD-R and CD-RW, and can break through the restriction of existing C D disc formats, be applied to surpass 100 minutes high-capacity CD-ROM, to cooperate the trend of high density compact disc development.

Though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention.Any those skilled in the art without departing from the spirit and scope of the present invention, should make some changes and modification, so the protection domain of patent of the present invention should be as the criterion with claims institute restricted portion.

Claims (30)

1, a kind of access method of high-capacity optical disk record format, it includes:

To have the MSF part of minute, second and sector in this record format of 24 bit representations;

With the E part more than hundred figure places of dividing at least in this record format of at least 1 bit representation, and this E part partly separated with this MSF deposit; And

Merge this MSF part and this E part, and be output as the record format of an EMSF temporal information.

2, the access method of high-capacity optical disk record format according to claim 1, it is characterized in that this MSF part also divides into 8 M part, 8 S parts and 8 s' F part, be respectively applied for the branch of expression two figure places, the second of two figure places and the sector of two figure places.

3, the access method of high-capacity optical disk record format according to claim 1 is characterized in that this E is stored in the ZERO district of Q passage.

4, the access method of high-capacity optical disk record format according to claim 3 is characterized in that the CD specification that this E partly is stored in the ZERO district of Q passage is comprised a kind of in CD-DA, VCD, SVCD, CD-ROM and the CD-RW group.

5, the access method of high-capacity optical disk record format according to claim 1 is characterized in that this E is stored in the pattern hyte of Head Section in the sector format.

6, the access method of high-capacity optical disk record format according to claim 5 is characterized in that this E partly is in the guard position of storage mode hyte.

7, the access method of high-capacity optical disk record format according to claim 5 is characterized in that the CD specification that this E partly is stored in the pattern hyte of Head Section is comprised a kind of in VCD, SVCD, CD-ROM, CD-R and the CD-RW group.

8, the access method of high-capacity optical disk record format according to claim 1 is characterized in that this E is stored in the end of this document or is stored in addition at least one specific file.

9, the access method of high-capacity optical disk record format according to claim 8 is characterized in that the CD specification that this E partly is stored in file is comprised a kind of among VCD and the SVCD.

10, the access method of high-capacity optical disk record format according to claim 1 is characterized in that the address that this EMSF temporal information is a data storing.

11, the access method of high-capacity optical disk record format according to claim 1 is characterized in that the time span that this EMSF temporal information is a data storing.

12, the access method of high-capacity optical disk record format according to claim 1 is characterized in that also comprising the step of file type in the identification CD, if the temporal information of the CD that is read this E part not then partly is set at 0 with this E in the storer.

13, the access method of high-capacity optical disk record format according to claim 1 is characterized in that also comprising:

Read the MSF part of a file in the CD, and be stored in the correspondence position in the storer; And

Read the E part of corresponding this document in the CD, and be stored in the correspondence position in the storer.

14, a kind of access method of high-capacity optical disk record format, it uses 24 positions to represent the temporal information of high-capacity CD-ROM altogether, and it includes:

Get the E part that has hundred figure places of branch at least in this record format of 1 bit representation in these 24;

Get the MSF part that has minute, second and sector in this record format of all the other bit representations in these 24, and this E part is partly stored together with this MSF; And

Merge this MSF part with this E part and be output as-the EMSF temporal information.

15, the access method of high-capacity optical disk record format according to claim 1, it is characterized in that this MSF partly is set at 22, and divide into 8 M part, 7 S part and 7 F part, with the branch that is respectively applied for expression two figure places, the second of two figure places and the sector of two figure places.

16, the access method of high-capacity optical disk record format according to claim 15, it is characterized in that this E of 2 partly also divides into 1 E1 part and 1 E2 part, and this E1 is stored between this M part and this S part, and this E2 is stored between this S part and this F part.

17, the access method of high-capacity optical disk record format according to claim 15 is characterized in that this E partial-length is 2, and adjacency is stored in before this MSF part.

18, the access method of high-capacity optical disk record format according to claim 15 is characterized in that this E partial-length is 2, and adjacency is stored in after this MSF part.

19, the access method of high-capacity optical disk record format according to claim 14, it is characterized in that getting this E and partly be 1, also this MSF is partly divided into 8 M part, 7 S part and 8 F part simultaneously, with the second of the branch, two figure places that are respectively applied for expression two figure places and the sector of two figure places, and this E partly is stored between this S part of this M part.

20, the access method of high-capacity optical disk record format according to claim 14, it is characterized in that getting this E and partly be 1, also this MSF is partly divided into 8 M part, 8 S part and 7 F part simultaneously, with second of the branch, two figure places that are respectively applied for expression two figure places so that the sector of two figure places to be arranged, and this E is partly stored between this S part and this F part.

21, the access method of high-capacity optical disk record format according to claim 14 is characterized in that this E part partly is stored in the Q passage with this MSF.

22, the access method of high-capacity optical disk record format according to claim 21 is characterized in that the CD specification that this E part and this MSF partly are stored in the Q passage is comprised a kind of in organizing with CD-RW of CD-DA, VCD, SVCD, CD-ROM, CD-R.

23, the access method of high-capacity optical disk record format according to claim 14 is characterized in that this E part and this MSF partly are stored in the Head Section in the sector format.

24, the access method of high-capacity optical disk record format according to claim 23 is characterized in that the CD specification that this E part and this MSF partly are stored in Head Section is comprised a kind of in organizing with CD-RW of VCD, SVCD, CD-ROM, CD-R.

25, the access method of high-capacity optical disk record format according to claim 14 is characterized in that this E part and this MSF partly are stored among this document.

26, the access method of high-capacity optical disk record format according to claim 25 is characterized in that this E part and this MSF partly are stored in CD specification in the file comprises a kind of among VCD and the SVCD.

27, the access method of high-capacity optical disk record format according to claim 14 is characterized in that the address that this EMSF temporal information is a data storing.

28, the access method of high-capacity optical disk record format according to claim 14 is characterized in that the time span that this EMSF temporal information is a data storing.

29, the access method of high-capacity optical disk record format according to claim 14, it is characterized in that also comprising the step of file type in the identification CD, if the temporal information of the CD that is read is this E part not, then this E in the storer partly is set at 0.

30, the access method of high-capacity optical disk record format according to claim 14 is characterized in that also comprising:

Read the MSF part of a file in the CD, and be stored in the correspondence position in the storer; And

Read the E part of corresponding this document in the CD, and be stored in correspondence position in the storer.

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