CN1207196A - Method and device for recording data in an optical memory card - Google Patents

Abstract

A method and a device for recording data in an optical memory card which facilitate discrimination between an unrecorded area and a recorded area in the optical memory card and which prevent double over writing. Recording pits are formed so that data to be recorded on the optical memory card is recorded in the same way as when recorded in the MFM-RZ modulation system. Data that was recorded in the NRZI-RZ modulation system is reproduced and then recorded in the MFM-RZ modulation system. This method forms the recording pits at least every 2 recording intervals or less in the recorded area in the optical memory card, making it possible to discriminate the recorded area of the optical memory card from the unrecorded area according to the presence or absence of the recording pits and thereby prevent double writing.

Description

The data record method and device of optical memory card

The present invention relates to a kind of data record method and device thereof of optical memory card, when particularly being all data recording, between 2 data records of the recording areas of storage card, produce a register hole at least, can improve the not recording areas and the ability of recording areas of identification optical memory card like this, prevent the rewriting of data reliably.

Usually, optical memory card is meant by the plastic clip of specifying size to be formed, the card that can read and write its recording areas by laser.

Fig. 7 represents the recording areas 102 of optical memory card 101, in this recording areas 102, shown in its enlarged drawing, be used for the data recording road 103 of recorded information and form at regular intervals lead 104 configurations alternately, this leads is the irradiation position of laser when being used for stablizing read data.

Here, data recording road 103 is different with the reflection coefficient of leading 104, and as comparing both reflection coefficients, then the reflection coefficient in 103 districts, data recording road is bigger, and it is less to lead the reflection coefficient in 104 districts.

Also have, data recording hole 105 is meant the low reflectivity region that produces by laser in data recording road 103, uses than having or not of this register hole 105 and represents the information that write down.

Fig. 8 has represented recording areas 102 data composition in logic, except the data recorded area 110 of recorded information, not shown optical memory card read write line is above bit synchronous guiding 111 of acquisition and the SYNC sign 112 that obtains frame synchronization also are recorded in during read record in the recording areas 102.

In the guiding 111, except recording SYNC sign 112, also has the register hole 105 that produces at regular intervals.

Here not shown optical memory card read write line has not shown synchronous generator, the synchronizing signal of this synchronous generator output is consistent with scanning guiding 111 detected each start signal, with such sweep velocity scan light storage card 101, obtain bit synchronization by keeping this sweep velocity.

Also have, SYNC sign 112 is lined up the pattern that can not produce to register hole 105 by modulating, and is used for not shown optical memory card read write line and obtains frame synchronization.

So-called frame is exactly the subregion of the signal processing circuit position when processing signals in the not shown optical memory card read write line, not shown optical memory card read write line has not shown counter for obtaining frame synchronization, this counter is counted above-mentioned synchronizing signal, output frame synchronizing signal when counting the required figure place of 1 frame is then to the value zero clearing of counter.

Here, what SYNC sign 112 was recorded in frame begins place's (or end of a period place), the read write line of not shown optical memory card scans optical memory card 101, in case detect the value zero clearing of SYNC sign 112 for the not shown counter of acquisition frame synchronization, can obtain frame synchronization reliably like this.

In addition, data recorded area 110 is a unit with the frame, and every frame is lined up by SYNC sign and n sector 113 shown in data recording areas 110-1, and sector 113 is made up of a position or a plurality of.

Fig. 9 is the key diagram that recorded data in the now used optical memory card is transformed into the NRZI-RZ that has or not (change on 1 do not return zero-the return zero) modulation system of register hole.

The NRZI-RZ modulation system is to produce the modulation system of pulse in NRZI (change on 1 and do not return zero) signal polarity counter-rotating place of modulation system.

Data shown in Fig. 9 (a) are modulated,, then shown in Fig. 9 (b), make the reversal of poles of signal in the position midpoint of data " 1 " as with the NRZI modulation system.

Therefore, as with the NRZI-RZ modulation system, shown in Fig. 9 (c), in the reversal of poles place generation pulse of signal shown in Fig. 9 (b).

With the data of this NRZI-RZ modulation system modulation, shown in Fig. 9 (d), be by writing down in the recording areas of optical memory card method with corresponding position, the position formation register hole of pulse.

In addition, Fig. 9 (a) and Fig. 9 (d) clearly illustrate, do not form register hole as the continuous part with NRZI-RZ modulation system data " 0 ".

But, before the read write line of optical memory card carries out data recording to optical memory card, earlier optical memory card is carried out read operation, have or not register hole to differentiate the not recording areas of optical memory card and recording areas by detection, to prevent data rewriting to optical memory card, when the continuum that " 0 " is arranged in the data of optical memory card record exists, because of no record hole, the continuum formation of data in optical memory card " 0 ".Therefore, being difficult to differentiate this district, to come recording areas still be recording areas, and the anti-rewriting ability of optical memory card read write line is lower.

Like this, the present invention is with a kind of modulation system record data, even make and also form register hole when having in the record data continuum of " 0 " to exist, simultaneously, by changing modulation system with the card of NRZI-RZ modulation system record, make to the not recording areas of optical memory card and the identification of recording areas become easily, can keep the anti-rewriting function of optical memory card read write line, purpose of the present invention just provides the recording method and the device of the optical memory card with above-mentioned functions.

For achieving the above object in the data record method of optical memory card of the present invention, it is characterized in that producing a register hole at least, the data record method of such optical memory card between 2 data record of described optical memory card recording areas.

At this, when the recording areas of described optical memory card is that the sector that is made of a position in the frame is when forming, described data are modulated with the NRZI-RZ modulation system, when in wanting the sector of record data, writing down, adjacent sectors to the sector of writing down these data carries out read operation, and this adjacent sectors is to write down, and, when the sector of described record data and described adjacent sectors all do not produce described register hole, can on the border of this record data sector, form register hole.

In addition, when the recording areas of described optical memory card is that the sectors that are made of a plurality of positions in the frame are when forming, modulate with the MFM-RZ modulation system, when in wanting the sector of record data, writing down, adjacent sectors to the sector of writing down these data carries out read operation, this adjacent sectors is to write down, and, when the record position that is connected two sectors on the border of the sector of described record data and described adjacent sectors does not produce described register hole, can on the border of this record data sector and this adjacent sectors, form register hole.

And, in the recording areas of optical memory card, exist if any data with NRZI-RZ modulation system record, described data are carried out read operation, under the continuous situation of the record position in described no record hole, form register hole and become at the boundary of this record position and carry out record by the MFM-RZ modulation system.

In addition, in the data recording equipment of optical memory card of the present invention, it is characterized in that possessing the equipment that produces a register hole between 2 data records of recording areas of described optical memory card at least.

Here, the recording areas of described optical memory card has when the sector that is made of 1 position in 1 frame is formed, described data are modulated with the NRZI-RZ modulation system, at the equipment that will carry out writing down in the sector of data recording, with the equipment that the sector adjacent with this data recording sector read, with this adjacent sectors be to write down, and, described data recording sector and described adjacent sectors are to write down, and, described data recording sector and described adjacent sectors all do not produce under the situation of register hole, produce the equipment of register hole on the border of this data recorded area and this adjacent sectors.

Also have, the recording areas of described optical memory card has when the sector that is made of 1 position in 1 frame is formed, described data are modulated with the MFM-RZ modulation system, at the equipment that will carry out writing down in the sector of data recording, with the equipment that the sector adjacent with this data recording sector read, with this adjacent sectors be to write down, and, when two record positions that link to each other all do not produce described register hole, on the border of this data recording sector and adjacent sectors, produce the equipment of register hole on the border of described data recording sector and described adjacent sectors.

And, when in the recording areas of described optical memory card, having the data that write down with the NRZI-RZ modulation system to exist, have equipment that described data are read and under the continuous situation of the record position that does not have described register hole, produce register hole and become the equipment that the MFM-RZ modulation system writes down at the boundary of this record position.

Below accompanying drawing is carried out briefly bright.

Fig. 1 is in the sector that is made of a position in expression one frame, and one during record data are implemented illustration.

Fig. 2 presses embodiment recorded data structural drawing on the read write line internal memory of storage card shown in Figure 1 for expression.

Fig. 3 presses an illustration of MFM-RZ modulation system modulating data for expression.

Fig. 4 is for implementing illustration by one during record data in a plurality of the sectors of forming in expression one frame.

Fig. 5 presses embodiment recorded data structural drawing on the read write line internal memory of storage card shown in Figure 4 for expression.

The storage card that Fig. 6 writes down by the NRZI-RZ modulation system for expression becomes an illustration by MFM-RZ modulation system record.

Fig. 7 is the recording areas figure of expression optical memory card.

Fig. 8 is the logic data structure figure of expression recording areas.

Fig. 9 carries out an illustration of data-modulated by the NRZI-RZ modulation system for expression.

Below, just the data record method and the device thereof of the optical memory card relevant with the present invention are described in detail with reference to accompanying drawing.

Fig. 1 is in the sector that is made of a position in the frame, the embodiment during record data, and Fig. 2 is for pressing embodiment recorded data structure on the read write line internal memory of storage card shown in Figure 1.

Here with Fig. 3 MFM-RZ (improving frequency modulation (PFM) one time zero) modulation system is described.The MFM-RZ modulation system is exactly the modulator approach that produces pulse in signal polarity counter-rotating place of MFM (improvement frequency modulation (PFM)) modulation system.

As with the MFM modulation system data shown in Fig. 3 (a) being modulated, its result is shown in Fig. 3 (b), in the mid point of data " 1 " position and the boundary signal polarity counter-rotating of data " 0 " consecutive hours position.

Therefore, as modulating in the MFM-RZ mode, its result is the reversal of poles place generation pulse at Fig. 3 (b) shown in Fig. 3 (c).

In addition, now the NRZI-RZ of usefulness (change on 1 do not return zero-return zero) modulation system is to produce the modulation system (with reference to Fig. 3 (e)) of pulse in NRZI (change on 1 and do not return zero) signal polarity counter-rotating place of modulation system (with reference to Fig. 3 (d)), and this NRZI modulation system is meant that the midpoint in data " 1 " position makes the modulation system of signal polarity counter-rotating.

MFM-RZ modulation system and NRZI-RZ modulation system relatively, at data " 0 " consecutive hours, modulating in the NRZI-RZ mode does not just have pulse to produce, and modulates in the MFM-RZ mode then to have at least a pulse to produce in two logging intervals.

Therefore, when reading " 0 " continuous data, though with can not recognition data " 0 " continuous district of NRZI-RZ modulation system and recording areas not, just can recognition data " 0 " continuum and recording areas not with the MFM-RZ modulation system.

So in 1 frame shown in Fig. 1 (a) by in the sector that constitutes during record data, there are data as shown in Figure 2 on the not shown read write line internal memory, the data of sector 0 are arranged at directions X, from the sector 0 data to the sector 39 data Y direction arrange in order.

Here, in Unrecorded card, to write down the data of sector 0, as S00000 is that " 1 ", S00001 are under the situation of " 0 ", shown in Fig. 1 (b), use NRZI-RZ modulation system record data, why be because constitute by a position in 1 frame with the NRZI-RZ modulation system, can be on the sector continuously record data, so data " 0 " do not have the continuum.

Secondly, to in the sector, write down the data of sector 1 in 0 card that had write down again, as S01000 is that " 1 ", S01001 are under the situation of " 0 ", equally with NRZI-RZ modulation system record data, simultaneously, before or after the data recording, sector 0 recorded data is carried out read operation, shown in Fig. 1 (c), (sector 0 is all under the situation of " 0 " with the data of sector 1) 0 produces register hole with the boundary of sector 1 in the sector if necessary.

Carry out data recording by this way and carry out data recording with the MFM-RZ modulation system the same, have or not register hole just can discern the not recording areas of optical memory card and recording areas, can prevent the rewriting of optical memory card by detection.

Fig. 4 is illustrated in the sector that is made of a plurality of positions in the frame, an embodiment of record data, the storage organization of recorded data on the internal memory of not shown card reader among Fig. 5 presentation graphs 4 embodiment.

Here, in the sector that in the frame shown in Fig. 4 (a), constitutes during record data by 4 positions, data are stored on the not shown read write line internal memory as shown in Figure 5, in card, data S00000, S00272, S00544, the S00816 of X=0 among Fig. 5 write down in the sector 0 of first frame of Fig. 4 (a), the data of X=1 among Fig. 5, S00001, S00273, S00545, S00817 are being write down in the sector 0 of the 2nd frame of Fig. 4 (a).

During record data, carry out in the sector that in a this frame, constitutes with the MFM-RZ modulation system by 4 positions.This is because on the formation of sector, the cause that has the continuous data recording of 4 positions in one frame at least when writing down the data of sector 0 in Unrecorded card, is " 0 " as S00000, S00001 is " 1 ", S00272 is " 0 ", and S00273 is " 0 ", and S00544 is " 1 ", S00545 is " 0 ", S00816 is " 0 ", and when S00817 was " 0 ", the result was shown in Fig. 4 (b).

Secondly, when in the card that write down sector 0, writing down the data of sector 1, be " 0 " as S10000, S10001 is " 1 ", S10272 is " 0 ", and S10273 is " 0 ", and S10544 is " 1 ", and S10545 is " 0 ", S10816 is " 0 ", and when S10817 was " 0 ", the result was shown in Fig. 4 (c).

In this case, sector 1 is carried out also will carrying out read operation to the data of sector 0 before or after the data recording, if necessary, the boundary of sector 0 and sector 1 will be by MFM-RZ modulation system record, and produces register hole on the border of sector 0 and sector 1.

Fig. 6 represents to become an example that writes down with the MFM-RZ modulation system with the card of NRZI-RZ modulation system record.

When the card with NRZI-RZ modulation system record being become when writing down with the MFM-RZ modulation system, originally with the card of NRZI-RZ modulation system record no matter be the discontinuous mode of sectors of data that constitutes by 1 position in 1 frame that belongs to above-mentioned, still belong to the sectors of data continuation mode that is made of a plurality of positions in 1 frame, can use the same method becomes MFM-RZ modulation system (the same with the MFM-RZ modulation system).

So, the data " 00000110100 " shown in Fig. 6 (a) are as with NRZI-RZ modulation system record, and then the result is shown in Fig. 6 (b), and the mid point in the position of data " 1 " produces pulse signal, produces the corresponding generation register hole in pulse position place in card.

Also have, the data shown in Fig. 6 (a) are as with MFM-RZ modulation system record, and then the result produces pulse signal at the mid point of the position of data " 1 " and at the position of data " 0 " continuum boundary shown in Fig. 6 (c).

From Fig. 6 (b) and Fig. 6 (c) relatively, as becoming with MFM-RZ modulation system record, as long as add register hole at the boundary of the continuum meta of data " 0 " with NRZI-RZ modulation system record.

Therefore, not shown card reader is earlier reading with the card of NRZI-RZ modulation system record, form register hole with the MFM-RZ modulation system according to the data of reading on card again, record data change to the MFM-RZ modulation system from the NRZI-RZ modulation system and become feasible thereby make.

Also have, not shown card reader detects by read output signal and has or not register hole to discern the not recording areas of optical memory card and recording areas, though the synchronizing signal of extracting out from read output signal is as data-signal, but change to the register hole that the MFM-RZ modulation system produces from the NRZI-RZ modulation system and not comprise synchronizing signal, therefore, can not influence data-signal, after card changed over the MFM-RZ modulation system, the card reader of NRZI-RZ modulation system can also be read this card.

The present invention can be used in the recording method and device thereof of optical memory card.According to the present invention, produce a register hole at least between 2 data record in the recording areas of optical memory card, record data have improved the not recording areas of optical memory card and the recognition capability of recording areas by this way, are easy to prevent the rewriting of data.

Claims (8)

1. the data record method of an optical memory card is characterized in that it being to produce a register hole at least, the data record method of such optical memory card between 2 data records of the recording areas of described optical memory card.

2. the data record method of optical memory card according to claim 1, it is characterized in that described optical memory card recording areas is that the sector that is made of 1 position in 1 frame is when constituting, described data are modulated with the NRZI-RZ modulation system, when the sector that will carry out data recording is write down, read operation is carried out in the sector adjacent with this data recording sector, this adjacent sectors is to write down, and, when described data recording sector and described adjacent sectors all do not produce described register hole, on the border of this data recording sector and this adjacent sectors, produce register hole.

3. the data record method of optical memory card according to claim 1, the recording areas that it is characterized in that described optical memory card is that the sectors that are made of a plurality of positions in 1 frame are when forming, described data are modulated with the MFM-RZ modulation system, when the sector that will carry out data recording is write down, read operation is carried out in the sector adjacent with this data recording sector, this adjacent sectors is to write down, and, when two record positions that link to each other all do not produce described register hole, on the border of this data recording sector and this adjacent sectors, produce register hole on the border of described data recording sector and described adjacent sectors.

4. the data record method of optical memory card according to claim 1, when it is characterized in that the data of NRZI-RZ modulation system record are arranged in the recording areas of described optical memory card, described data are carried out read operation, under the continuous situation of the record position that does not have described register hole, produce register hole at the boundary of this record position, and become with the MFM-RZ modulation system and carry out record.

5. the data recording equipment of an optical memory card is characterized in that possessing between 2 data records of the recording areas of described optical memory card and produces a register hole at least, such data recording equipment.

6. the pen recorder of optical memory card according to claim 5, the recording areas that it is characterized in that described optical memory card possesses: when the sector that is made of 1 position in 1 frame is formed, described data are modulated with the NRZI-RZ modulation system, the equipment that the sector that will carry out data recording is write down, with the equipment that the sector adjacent with this data recording sector is carried out read operation, also have, this adjacent sectors is to write down, and, when described data recording sector and described adjacent sectors all do not produce described register hole, on the border of this data recording sector and this adjacent sectors, produce the equipment of register hole.

7. the pen recorder of optical memory card according to claim 5, the recording areas that it is characterized in that described optical memory card possesses: when the sector that is made of a plurality of positions in 1 frame is formed, described data are modulated with the MFM-RZ modulation system, the equipment that the sector that will carry out data recording is write down, with the equipment that the sector adjacent with this data recording sector is carried out read operation, also have, this adjacent sectors is to write down, and, when two record positions that link to each other all do not produce described register hole, on the border of this data recording sector and this adjacent sectors, produce the equipment of register hole on the border of described data recording sector and described adjacent sectors.

8. the pen recorder of optical memory card according to claim 5, when it is characterized in that possessing the data that in the recording areas of described optical memory card, write down with the NRZI-RZ modulation system, described data are carried out the equipment of read operation and do not had the record position consecutive hours of described register hole, boundary at this record position produces register hole, and becomes the equipment that writes down with the MFM-RZ modulation system.

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