JP2578846B2 - Recording control method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording control method for an information recording / reproducing device such as a write-once optical disc recording / reproducing device that performs so-called multiple writing.

2. Description of the Related Art In an information recording / reproducing apparatus using a write-once optical disc or the like as a recording medium, the apparatus avoids a recording error due to some cause of the medium or the medium, or prevents the recorded information from being unable to be reproduced due to damage or contamination of the recording medium, and has a high reliability. In order to improve the same, the same information is recorded in a plurality of recording areas on the recording medium. So-called writing is performed a plurality of times. Further, in order to facilitate reproduction of recorded information, the recording format is such that the same information is recorded at the same position in each recording area.

The case of writing three times will be described with reference to FIG. W1, W
2, W3 is a recording area on a write-once optical disc, for example. When recording information, first, the recording area W1 is searched to detect the last sector recorded normally, and the information is recorded in the next sector W1-1. Next, the recording area W2 is searched to detect the last sector normally recorded, and the next sector (W2-
The address in the area 1) is compared with the address in the area of the sector W1-1, and if they match, the same information is recorded in the sector W2-1. If the comparisons do not match, the recording ends. Sector W2
When the information is recorded at -1, the recording area W3 is searched next,
The normally recorded last sector is detected, the address in the area of the next sector (W3-1) is compared with the address in the area of the sector W2-1, and if they match, information is recorded in the sector W3-1. . If the comparisons do not match, do not record.

Problems to be Solved by the Invention However, according to such a configuration, there is a problem that a recording format disorder due to a recording error occurring in a part of the recording area is diffused, and the effect of multiple writing may be significantly impaired. there were.

For example, in FIG. 3, when a recording error occurs in the sector W3-2 of the recording area W3, information is not recorded in the recording area W3 from sector W3-3 onward. Ie sector
The effect of the abnormality of W3-2 extends to the subsequent sector. And
Since information is continuously recorded in the recording areas W1 and W2, the format of the three-time writing is lost, and the writing is substantially performed twice. Conventionally, since the recording is continued as it is, the recording format abnormality caused by the recording abnormality of the sector W3-2 spreads to a wide range.

When a recording error occurs in the sector W2-2 of the recording area W2, information is no longer recorded in the sectors subsequent to the sector W2-3 in the recording area W2 and the sectors subsequent to the sector W3-3 in the recording area W3. That is, the influence of the recording abnormality in the sector W2-2 of the recording area W2 not only affects the succeeding sector of the recording area W2 but also the sectors subsequent to the corresponding sector W3-3 of the recording area W3. In the recording area 1, information is recorded unless a recording abnormality occurs in the recording area 1. Therefore, the information is substantially written once, and the abnormality in the recording format is diffused. As described above, until the recording abnormality occurs in the recording area having the earliest recording order, the information recording on the recording medium is continued while the recording format is remarkably disturbed, and the recording format abnormality is spread over a wide range. However, the effect of writing multiple times was greatly impaired.

The present invention has been made in view of the above-mentioned problems, and in an information recording / reproducing apparatus such as a write-once optical disc recording / reproducing apparatus that writes a plurality of times, the recording format is disturbed due to the diffusion of a recording abnormality that has occurred in a partial recording area. It is an object of the present invention to provide a recording control method capable of preventing the recording.

Means for Solving the Problems According to the present invention, in order to solve the above-mentioned problems, a plurality of recording areas are formed, and each recording area is provided on a recording medium having relatively the same position information. In the recording and reproducing apparatus having means for sequentially recording the same information at a position corresponding to the same position information, managing the position information recorded in each of the recording areas, and comparing the position information,
At the time of information recording, the position information based on the last position where information was normally recorded in the recording area with the earliest recording order and the position based on the last position where information was normally recorded in the recording area with the latest recording order The information is compared with the information. If the information does not match, the information recording is prohibited.If the information matches, the information is recorded. In this case, the recording of information is prohibited when there is a mismatch, and the recording of information is performed when there is a match.

As described in connection with the problem of the prior art, in an information recording / reproducing apparatus that performs writing multiple times, when a recording abnormality occurs in a certain recording area on a recording medium, the recording area and a subsequent recording area No information is recorded after the recording abnormality occurrence position. As a result, the normally recorded final positions of the recording area with the earliest recording order and the recording area with the latest recording order do not match.

Therefore, the position information based on the last position where the information is normally recorded in the recording area with the earliest recording order and the position information based on the last position where the information is normally recorded in the recording area with the latest recording order In the case of a mismatch, the information recording is prohibited, and in the case of a match, the information is recorded and compared with the position information based on the last position where the information is normally recorded in the adjacent recording area, According to the above-described configuration of the present invention in which recording of information is prohibited in the case of a mismatch and information is recorded in the case of a match, recording of information on a recording medium is performed after a recording abnormality occurs in a certain recording area. Is completely prohibited, and the spread of the recording format abnormality due to the recording abnormality can be avoided beforehand, and the profit of writing multiple times can be guaranteed.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic configuration of a write-once optical disc recording / reproducing apparatus according to an embodiment of the present invention. This write-once optical disk recording / reproducing apparatus includes an optical disk drive device 1 and a control device 2. The control device 2 includes a processing control circuit 3, a memory 4, a drive control circuit 5, and a higher-level interface circuit 6 that controls an interface with a higher-level device.

The processing control circuit 3 exchanges commands, responses, and data with the higher-level device via the higher-level interface circuit 6,
Further, it controls the recording and reproduction of information by the optical disk drive 1 via the drive control circuit 5. Memory 4
Are used as a buffer storage area for read data and write data, a working storage area for the processing control circuit 3, and the like. The processing control circuit 3 executes the detection of the final recording position for recording control, the comparison determination of the final recording position, the writing prohibition of information according to the result of the comparison determination, and the like.

In the present embodiment, as shown in FIG. 3, three recording areas W1, W2, and W3 are set on the optical disk, and the same information is written from the first recording area W1 to the third recording area W3. Same address (relative address in each recording area, and so on)
In the sector. In general, N recording areas are set and similar information recording is performed.

FIG. 2 shows a flowchart of the recording operation. The information recording operation of the optical disk recording / reproducing apparatus according to the present embodiment will be described below with reference to this flowchart and FIG.

When the processing control circuit 3 receives the information writing command and the writing information from the host device, in step 1, the processing control circuit 3 causes the optical disk drive device 1 to reproduce the recording area W3 via the drive control circuit 5, The last sector in which information is normally recorded in the recording area W3 is searched, and the address of the sector next to the last sector is stored in the memory 4.

In the next step 2, the processing control circuit 3 similarly searches for the last sector in the recording area W1 where information has been normally recorded.

In step 3, a comparison is made between the address of the sector next to the last sector of the recording area W 1 and the address of the sector next to the last sector of the recording area W 1 stored in the memory 4. Although this comparison is substantially a comparison of the last sector address, the comparison of the address of the sector next to the last sector is performed in relation to information recording. Therefore, the address of the last sector may be directly compared.

Here, it is assumed that the sectors W1-1, W2-1, and W3-1 have been normally recorded, and the comparison in step 3 matches. In this case, the processing control circuit 3 starts recording information from the recording area W1 as in the related art.

That is, in step 4, the write information (in the buffer storage area on the memory 4) is transferred to the optical disk drive 1, and the last recorded sector W1-
The data is recorded in the sector W1-2 next to the first.

When this recording is completed, a search is made in step 5 for the last recorded sector W2-1 in the recording area W2. In step 6, the address of the sector W2-2 next to the searched sector W2-1 and the address of the sector W1-2 of the recording area W1 are compared and determined. Note that the address comparison between the sector W2-1 and the sector W1-1 may be performed as in the case of step 3.

Here, since the comparisons match, the recording area
The write information is recorded in the next sector W2-2 in W2.

Next, in step 8, the address of the sector W3-2 next to the last sector W3-1 (searched) in the recording area W3 and the address of the sector next to sector W2-1 (searched) in the recording area W2. Is compared and determined. Note that the address comparison between the sector W3-1 and the sector W2-1 may be performed in the same manner as in step 3. Here, since the comparisons match, the next sector W3 in the recording area W3 is determined in step 10.
-2 to record information.

Next, in step 10, the processing control circuit 3 transmits a normal response to the higher-level device via the higher-level interface circuit 6, and ends the recording operation.

Now, it is assumed that a recording abnormality has occurred in the sector W3-2 in the recording area W3 due to a flaw in the medium or other causes due to the above-described recording operation. In this case, at the time of the next information recording, there is a mismatch in the comparison in step 3, so the processing control circuit 3 prohibits the information recording, transmits an abnormal response to the host device in step 11, and performs the recording operation without performing the recording at all. To end.

On the other hand, the sector W2 of the recording area W2 is
-2, a recording error has occurred, and sectors W1−
2. It is assumed that the information is normally recorded in W3-2. In this case, at the time of the next information recording, since the comparison in step 3 matches, the recording operation starts, and recording is performed on the sector W1-3 of the recording area W1. However, since the comparison in step 6 does not match, no data is recorded in the sectors W2-3 and W3-3 of the recording areas W2 and W3. As a result, at the time of the next information recording, step 3
Does not match, an abnormal response is transmitted to the host device, and recording on the optical disc is completely prohibited.

As described above, when a recording abnormality occurs, recording on the optical disk is prohibited before the abnormality in the recording format is diffused, and the damage can be minimized.

Although this embodiment is an example in which a write-once optical disc is used as a recording medium, the present invention can be similarly applied to a similar multi-write information recording / reproducing apparatus using another recording medium. .

In the present embodiment, recording is performed in units of sectors. However, the present invention can be similarly applied to a case where recording is performed in units other than sectors depending on the type of recording medium.

As is clear from the above description, according to the present invention, the last position where information is normally recorded in the recording area with the earliest recording order and the information is normally recorded in the recording area with the latest recording order. Compared to the final position, the recording of information is prohibited if they do not match, preventing the spread of recording format errors due to recording errors that occurred in a certain recording area, and guaranteeing the benefits of multiple writing. It has.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a write-once optical disc recording / reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a flowchart of an information recording operation of the apparatus, and FIG. It is a figure. 1 ... Optical disk drive device, 2 ... Control device, W1, W
2, W3 …… Recording area.

Claims (1)

(57) [Claims] 1. A plurality of recording areas are formed, and each recording area sequentially stores the same information on a recording medium having relatively the same position information at a position corresponding to the relatively same position information of each of the recording areas. In a recording / reproducing apparatus having means for recording and managing position information recorded in each of the recording areas and comparing the position information, at the time of information recording, information is normally recorded in the recording area in the earliest recording order. The position information based on the final position is compared with the position information based on the last position where the information is normally recorded in the recording area having the latest recording order. In this case, the information is recorded and compared with the position information based on the last position where the information was normally recorded in the adjacent recording area. If the information does not match, the information recording is prohibited. Recording control method characterized by performing the recording.