JPH01290169A - Data recoding method - Google Patents

Abstract

PURPOSE:To attain sequential data control by preventing data from being recorded after a time when the continuing number of unrecordable blocks goes over the number of continuous non-data blocks for the detection of a final recording block. CONSTITUTION:At the time of data recording, when the number of the blocks, which can not be continuously recorded by any external causes, goes over a certain constant to be over or under the prescribed number of the blocks, to which the data for the detection of the final recording block are not recorded, the recording of the data is not executed hereafter. Namely, when the data are recorded, it can not be allowed that the continuous non-data tracks over five tracks exist between a final recording track ME and the next recording track. Then, for example, when the data can not be continuously recorded over three tracks, by preventing the data from being recorded after the track, non-data over continuous five tracks can be avoided. Thus, the detection of the final recording track can be executed without fail and the sequential data control can be executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data recording method for a record carrier that allows data to be additionally recorded on a unit-by-unit basis.

[Conventional technology]

Conventionally, paper tape, magnetic data, etc. have been used as record carriers on which data is sequentially recorded. When recording data on these record carriers, the end of the recorded data is indicated by providing a D mark, feed, etc., which means the end of the data, at the end of the recorded data.

When reproducing data, the end of the data can be detected by detecting this END mark or the like.

If you want to add additional data to such a record carrier.

It is necessary to know the end position of the data that has already been recorded. For example, in the case of magnetic data, you can find out how far the data has been recorded by searching the LWD w-ri, and then overwrite the END mark from the position of the body mark to record additional data. and then again at the end of this additional recording data! - records the results.

However, for example, in a record carrier such as an optical card where recorded data cannot be rewritten, it is impossible to overwrite the quake mark, and it is not possible to overwrite the quake mark. After confirming that a predetermined number of unrecorded blocks continue, the last block in which data is normally recorded is determined to be the last recorded block. Then, data recording is performed at the beginning of a predetermined number of continuous data-free blocks following the final recording block after the final recording block is detected, thereby realizing sequential data recording. When recording this data, there may be some errors due to dust, dirt, etc. on the record carrier, or due to external factors such as vibration of the data recording device, and the data cannot be recorded, and data recording may continue thereafter.
), several areas with no data are created within the area where data has been recorded. See.

[Problem that the invention seeks to solve]

If there is no continuous data in the area where the data has been recorded, and the number of blocks is greater than the number of blocks that have not been recorded in the final recording process, the block or dirt that caused an error during recording. .

If external factors such as vibrations are removed, it becomes impossible to distinguish between a block in which no data is recorded, a rounding in which no data is recorded, and a continuous block without data in the rounding at the time of detection of the last recorded block.

As a result, a big problem arises in that the judgment of the final recording process is incorrect, and when the main data is added, the data is recorded on top of the block that has already been recorded. Unfortunately, the principle of sequentially adding data breaks down and data management becomes impossible.

The present invention has been made in view of these problems, and its purpose is to provide a data recording method that allows reliable detection of the last recorded block and enables sequential data management.

[Means for solving problems]

In order to achieve the above object, the data recording method according to the present FIAK detects the last recording block of a record carrier on which data is recorded every predetermined unit process. When a predetermined number of consecutive blocks in which no data is recorded continues, the block in which the data is recorded is determined to be the final recorded block, and the predetermined number of consecutive blocks after the last recorded block are determined. In a data recording method for recording data from a block in which no data is recorded, a predetermined number of blocks in which data is not recorded for determining the final recording block is also provided.
This is done to reduce the number of blocks that cannot be recorded continuously due to some reason.

In other words, when recording data, the number of blocks that cannot be continuously recorded due to some external factor is greater than or equal to a certain number of blocks in which no data is recorded for detecting the final recorded block. If so, no further data will be recorded.

〔Example〕

FIG. 4 is a block diagram showing an embodiment of an optical card data recording/reproducing apparatus to which the data recording method according to the present invention is applied, and is configured such that data recording and reproduction on the optical card is controlled by a microcomputer. ing.

In FIG. 4, bus 1 includes a central processing unit (CPU).
) 2. Stored memory (RO
M) 3. Working area (RAM) containing registers used for various processing by CPU 1
4. Data file 5 in which recording data to be recorded on the optical card C is recorded. A recording/reproducing circuit 6 and a pulse motor 7 are connected.

The optical head 8 includes a recording/reproducing circuit 6 and a nozzle motor 7.
The optical card C is controlled by the optical card C, and the original beam is irradiated onto the optical card C to record and reproduce data.

FIG. 5 is a schematic plan view of the optical card C.

On this original card C, unit pro for data recording,
As a data controller, Ml e M2 m...

A main data recording section M consisting of nine files, and an auxiliary data recording section M consisting of directories D1, D2, . . . for managing seven files of data are provided.

In addition, each data track Mj 1m2+, 4@・＊+
On each extension line of M6, verify (V@r
) mark (hereinafter referred to as ■ mark) Vl,
Verification mark recording section V consisting of V4,...eVn
is provided.

Recording of data to the data tracks M1 to Mn of the main data recording section M is performed one track at a time sequentially from the top to the bottom in the figure of the optical card C. The directory Dl of the auxiliary data recording section # D2... is data file 5
It is recorded every time data recording from
In the case of this embodiment, it is possible to record 5 directories on one track as shown in the figure, and within one track, one directory is recorded from the left to the right in the figure, and after recording the 5 directories, it is possible to record in the upper track in the figure. Record the movement and add notes sequentially from top to bottom.

6 (N and (B)) are data formats of data tracks MJ (j-1 to n) and directory DJ in FIG. 5.

In FIG. 6 (4), the data tracker number area 10m is an area for recording the number of the data tracker,
"1" for RI Ml, "2" for data tiger, RI Ml
The data area 10b is an area for recording the main data of that tiger, and the serial numbers are recorded in sequence. The ECC area 10e is an area for recording error correction codes.

In Figure 6 (B), Builev) IJ number area 1
1m is an area for recording the directory number, "1" for directory D1 and "2" for directory D2.
, and memorize the consecutive numbers from now on.

The directory area 11b is an area for recording main data contents 1 of the directory, such as file name 1 date, file size, etc. The EOT address area lie records the directory and enters the main data recording section MO final recording track (EOT: End of Traak) at 9:00.
This is the area to record the address of the actual KO? It doesn't necessarily match the number. The ECC area lid is an area in which an error correction code is recorded.

FIG. 7 is an enlarged view of the main data recording section M and the verify recording section V in FIG. Datatra, RiMn-
5* Mn-2e...K, the recorded information is thus modulated, and optically detectable recording pits 12 are recorded by scanning the original beam focused on a minute groove on the optical card C. ing. In order to accurately record or reproduce the recording pits 12, it is necessary to control the irradiation position of the light beam in a direction perpendicular to the scanning direction.

King Tiger, RI'rn-31'rn-2#... are provided.

Next, a method for recording data in the main data recording section M will be briefly explained with reference to FIG.

First, in the direction of arrow a shown in the figure, )tsu, king track Tj
While performing automatic tracing and kinging (hereinafter referred to as AT) along the recording information, a light beam modulated according to recording information is moved to record data recording and MJK recording. 1) Record the remaining data.

The light beam is reversed and this time it scans in the direction of the arrow, and the so-called verify operation is performed to check whether the data has been recorded correctly by reproducing the data that was just recorded and comparing it with the recorded data. If the verification result is normal, a V° mark Vj is recorded on the extension line of this data track Mj, indicating that the data has been successfully recorded. If normal recording cannot be performed due to a defect in the optical card, and an error occurs during verification, move to the next tray, Rimachi+1, without recording the V mark VJ, and record the same data again. Then perform the same process.

Next, a data recording method according to this embodiment will be explained.

First, regarding the procedure for determining EOT, see 7 in Figure 2.
0 - Explained using a chart 0 In this embodiment, there is a data track (hereinafter referred to as Ml) on which information is normally recorded and a V mark is recorded.
5 consecutive times with no data in the next year (Yo)
Confirm that the first track (denoted as M) exists (however, after the data track M, there are data tracks where information is recorded normally and a V mark exists. ), data tracker M8 is determined to be EOT.

Figure 3 shows the EOT of the enlarged view of the original card C shown in Figure 7.
An example in which there is a defect in the subsequent data track and an example in which only data is recorded without a V mark are shown. In the figure, on the data track Ml there is a V mark V, a gap data track M, and after that there are at least five consecutive dataless tracks, on the data track in Figure 3 (a) a (h). EFir Effect X1 e X2 exists, Day 7 Effect
When the light beam scans this track, the AT shifts at the defective part and recording cannot be performed normally. Further, in the data tracks MD1 to MD4 of FIG. 7(e), the ninth V mark where there was a verify error during data recording is not recorded.

In order to determine the EOT, all directories on the optical card C are read (201 in FIG. 2). EOT address information is written in the directory as described above, and this information is used in step 202. to seek the head to the EOT address.

After step 203, V mark detection for EOT determination and detection of 5 consecutive dataless tracks are performed.
In step 203, playback operation for one track is performed, and in step f204, check whether the ATd deviation is large on that track. In step 206, add 1 to the AT error number indicating the number of consecutive AT error errors, and in step 206, repeat the same error in the opposite direction to confirm the existence of the V mark and data. Reproduce. Ste, pu 203 and 1 tora.

This is because when the regeneration operation is performed, the AT may become dislocated due to the day 7 ect at the tip of the rear or rear end.

In step 207, determine whether the played track <V mark is present, and if there is a ■ mark, proceed to step f211, advance to R
AMJ shows the temporary EOT of currently playing 9 tracks, save number and error track number.

AT Erato 2. If there is no V mark at f207, step f208 determines whether there is an AT deviation in step 204, and if so, go to step 213. Determine whether data is recorded in step 209,
If recorded, AT in RAM4 in Stella 7'212
Clear the error number and RAM with Stella f213
There is a last KV mark that is saved in 4, and the difference between the 9th track position and the current track position is set to the error track number indicating the number of error tracks after EOT in RAM4. The number of error errors in step 213 includes both the case where there is an AT error and the case where there is no AT error, such as when there is data in the judgment at step 209. If it is determined that there is no data in step 209 (this means that there is no AT error and no data is recorded in step 2), step f.
210, check if there is no data by checking 5 tracks.
If it is N□, NOJ, go to f214, move to the next track, and stay until there is no data for 5 consecutive tracks.

Step 203 is repeated, and if there is no continuous data after 5 data in step 210, the data stored in RAM J is determined to be the number EOT and the process ends.

The A'r error tracker and the error tracker and number in RAMJ are used when recording data as described below.

Next, the procedure for recording data will be explained using the flowchart shown in FIG.

As mentioned above, in this embodiment, the EOT is determined based on five consecutive tracks with no data, but in order to detect this EOT, when recording data, the EOT and the next track to be recorded must be checked.
5 tigers between ri, ri or more without consecutive data, ri must not be present. Therefore, if you cannot record data for more than 3 consecutive times, do not record any more data.

Avoid missing data for more than 5 consecutive days. This value of 3 tracks is set as a margin of 1 track (
The decision was made based on the amount of time available.

The sequence for recording data for one track will be described below.

First, in step 7'l01, check whether the AT error count in 4 determined in FIG. 2 is 0. If it is 0, it is determined in step 113 whether the number of error tracks is smaller than m. This is to prevent consecutive tracks that do not have V marks, that is, tracks that are not recorded normally.The value of 1m is determined by the reliability of the media, the throughput during playback, etc. . Step 113
If the number of error tracks is greater than m, no further recording is performed and the process ends with an error. If less than m, step 10
In step 102, if the number of AT process 2 tracks is greater than 3, that is, if it is 4 or more, further recording is performed and the process 2 ends. If the AT error number is 3 or less in Stella f102, it is determined in step 103 whether the AT error number is 3 or not, and if it is not 3, that is, it is smaller than 3, Stella 7
Proceed to '106. If the number of AT errors is 3, step 1
The address to be recorded next in 04 is the same as the EOT address saved in tbRAM 4 (RAM J
The light beam is moved to a track ahead by the number of error tracks stored in the memory plus 1, and that track is AT.
Try scanning the original beam to see if there is any deviation. Then, in step 105, if there is a deviation in the AT at that time, no further recording is performed and the process ends with an error. A
If T is not off, the process advances to step 106 and subsequent steps to record data.

In step 106, the light beam is transferred to the next recording device.
(This is the address of the EOT saved in RAM 4). The data recording and verification operations are performed. Note that if the number of AT error registers is 3 in step 103, and therefore the AT error check has been performed in step 7'104, the light has already been detected. Since the beam is moving to the next track to be recorded, the operation in step 106 is not necessary. During the operation of step f107, it is determined by step 7" 108 whether there is a shift in the AT, and if there is no shift in the AT, step Step 109 clears the AT error count in RAM 4 (if there is no deviation in the AT, the data has been recorded), Step 10 determines whether the verification result is normal, and if there is an error, step Step 10. Go to Pu 115,
If it's normal, stay.

Go to track 111 and record Vr-ri on that track.

2. Move the light beam to the next step in preparation for the next light operation. Move to Then, in step 112, the error numbers and AT error numbers in the RAM 4 are cleared, the EOT numbers of the EOTs that have been successfully recorded at present are saved, and the process is terminated.

If it is determined in step 108 that there is an error in the AT during the recording operation, the process advances to step 114 and the number of AT error errors in RAMJ is incremented by one. This is because if there is a day 7 ect at the tip of the write track in step 107, the AT will be out of alignment and no data will be recorded on that track. In addition.

If the person T falls off during the trip, information is recorded until then, but in this example, A
T is because when a discrepancy occurs, it is impossible to determine whether information was actually recorded.

In this case, ST, f114, AT error tiger,
Increase the number by +1. In an embodiment in which information is recorded even if the AT is misaligned and it is possible to determine whether the track is round, the number of AT error tracks may be incremented by 1 only when information is recorded. After the number of AT error tracks in the RAM 4 is incremented by 1 in step 114, it is determined in step fl 15 whether one retry has been made in this one data recording routine. If the AT is off or an error occurs during verification, recording is performed again at the next time, but the maximum number of retries is set to n times. In step 115, if the number of retries has been n, no further recording is performed and the process ends with an error. If the process is repeated n times, proceed to Step 116, add 1 to the number of error tracks in RAMA, and repeat Step 101 until the data can be recorded normally.
In addition, before the Ritotsui became the ath time, Ste... In 102, if the number of whiplash errors is 4 or more, or if the number is 4 or more, or! If there is a deviation in the AT in step 105, the process ends with an error at that point.

When the data recording for one time is finished and the next data is to be recorded, the routine starts at the beginning of the ninth routine.

When file management is performed using a directory, when data recording for one file is completed, a directory including the EOT address is recorded.

According to this example, 2)? If the day 7 data spans less than y, you can record without any problem after that day 7 data.
In the case of a defect that spans 3 tracks as shown in Figure 3 (,), the 4th track and 2nd mark confirm that the AT does not shift, so the 4th track and 3rd track can be reliably recorded, and the 3rd track In the case of a day 7 ect extending over four or more tracks as shown in FIG. 7(b), no recording is performed beyond that day 7 ect.

In this embodiment, the continuous [AT is out of track], the number of tracks is set to 3 degrees, the number of tracks with no continuous data for EOT detection is set to 5, and defects over 3 tracks are tolerable, but the number of faults that are permissible is 7. These values vary depending on the size of the ect. Further, in this embodiment, a margin of 1 track is provided, but the margin can be set as small as possible, and it is also possible to provide a margin of 2° or more.

Further, in this embodiment, if there is no error as a result of correction, a V mark is recorded.

It goes without saying that the present invention can be applied even when no V mark is recorded.

In addition, in this embodiment, the last track with the V mark is set as the final recording track, but since there is an error in the recorded track after the last track with the mark, the track without the V mark is set as the final track. It is also possible to use it as a recording track.

〔Effect of the invention〕

The present invention is a professional camera that cannot record a little if the AT is out of alignment.

If the number of continuous data blocks is counted in the final recording process and there are no continuous data blocks for detection, it is decided that data will not be recorded after that, so the AT will not be able to record dust, dirt, etc. that caused the shift. Even if external factors such as defects or equipment vibration are removed, the AT will still
The continuous number of ri that could not be recorded is not confused with the final recording pro, a pro without continuous data for ri detection, and the predetermined number of ri, and the final recording pro and ri can be detected reliably. Ru. This makes it possible to realize sequential data management.

[Brief explanation of the drawing]

Figures 1 to 7 are explanatory diagrams showing one embodiment of the present invention, in which Figure 1 is a flowchart showing the procedure of data recording, Figure 2 is a 70-chart for EOT detection,
Figure 3 is a diagram showing a case where there is a T7 ect on Tora and Ri, or a case where data is recorded but a V mark is not recorded because there is a Peri7 Aie2-, and Figure 4 is a diagram showing data according to the present invention. 5 is a schematic plan view of the original cart 9, and FIG. FIG. 7 is an enlarged view of the main data recording section of the optical card. M...Main data recording section (data recording section), M...
・・Last recorded track, ri, M, ・・・°first track of 5 consecutive tracks with no data, ri1 MDI + Mn2
+MD3? Mn4...V mark is not recorded because there was a Veri 7 eye error during data recording, V... Veri 7 eye mark recording section, V, V mark corresponding to the last recording track, Xl*X2 ...defect. Agent Patent Attorney Jo Taira Yamashita Figure 3 (CJ) (b) (CJ Figure 6

Claims (1)

[Claims] The last recording block of a record carrier in which data is recorded in each predetermined unit block is detected when a predetermined number of consecutive blocks in which no data is recorded continues after the block in which the data is recorded. In a data recording method in which a block in which a predetermined number of data are recorded is determined to be the final recording block, and data is recorded from a block in which a predetermined number of data are not continuously recorded after the final recording block, the final recording block is determined. A data recording method characterized in that the number of blocks that cannot be continuously recorded due to some reason is smaller than the predetermined number of blocks in which the data is not recorded.