JPS62162282A - Recording medium processing system - Google Patents

Abstract

PURPOSE:To suppress the double wiring in a recorded sector or the generation of an unrecorded sector as small as possible by providing the 1st flag part indicating the existence of data recording in one sector and the 2nd flag part indicating the existence of data recording in the other sector in one sector. CONSTITUTION:In the sector (N-1)th format, a flag part A (12a) records the using state of the sector (N-1)th, i.e. the sector concerned (one sector), and a flag part B (12b) records the using state of the sector Nth (the other sector) next to the sector (N-1)th. In the sector Nth, the flag A (22a) records the record ing state of the sector Nth and flag B (22b) records the recording state of the sector (N-1)th. At the time of reproducing, the contents of the flag part B (12b) of the preceding sector (N-1)th of the objective sector Nth, and at the existence of a recorded flag, the data are reproduced. In case there is no recorded flag, the contents of the flag part A (22a) of the objective sector Nth are read out and the existence of a recorded flag is decided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a recording medium processing method, and more particularly to a recording medium processing method for recording and reproducing data depending on the format of the recording medium.

[Conventional technology]

FIG. 3 is a configuration diagram showing the sector configuration of a general recording medium. In the figure, 1 is a recording medium, and a plurality of sectors are evenly divided radially. Data is recorded or reproduced.

FIG. 4 is a format diagram showing the structure of the sector and the format within the sector in a conventional optical disk device. A header section consisting of a sector mark 10 indicating the beginning of the sector and an address section 11 indicating the address section of the sector is preformatted, and a flag section 12 indicating the usage status of the sector;
It is composed of an add-on section including a sync section 13 that records a synchronization timing signal and a data section 14 that records user data.

FIG. 5 shows the target sector N number (N
: is a diagram for explaining part of the operation of reproducing data from an integer) and the operation of recording data into the target sector N.

Hereinafter, processing procedures for reproducing and recording on the above-mentioned recording medium will be explained with reference to FIGS. 4 and 5.

First, during reproduction, the contents of the flag portion of the target sector N are read (step 301), and it is determined whether there is a recorded flag (step 302).

If there is a recorded flag, the data recorded in the target sector N is reproduced in step 30.
3) If there is no recorded flag, the CPU (not shown) reports a hair address error (step 304).
).

The above-mentioned recorded sectors are managed in a directory area (not shown) provided on the recording medium 1, but the CPU that receives the address error report performs processing when an error occurs, and also manages the above-mentioned target sector. It is determined that the Nth sector is an unrecorded sector, and the directory is corrected.

Next, at the time of recording, the contents of the flag part of the target sector N number are read (step 401), and if there is no recorded flag, it is determined that it is an unrecorded sector, and data is recorded in the target sector number N (step 401). 403). On the other hand, if there is a recorded flag, an address error is reported to the CPU (step 404). Upon receiving the report, the CPU performs the process when an error occurs in the same manner as during playback, determines that the target sector N is a recorded sector, and corrects the directory.

[Problem that the invention seeks to solve]

Conventional recording medium processing methods are configured as described above, so if some defect occurs in the flag section of a sector of the recording medium, it may be determined that there is no recorded flag even though there is a recorded flag, or vice versa. Even though there is no recorded flag, it is determined that there is one, and the directory that manages recorded sectors is incorrectly modified based on that information, resulting in duplicate data being added to recorded sectors. Writing,
There were problems such as unrecorded sectors being managed as recorded sectors.

This invention was made to solve the above problems, and even if some kind of defect occurs in the flag section of each sector, double writing to recorded sectors and unrecorded sectors will not occur. The purpose of the present invention is to obtain a recording medium processing method that can prevent such problems as much as possible.

[Means for solving problems]

In the processing method of a recording medium according to the present invention, one sector is provided with a first flag section indicating whether data is recorded in one sector and a second flag section indicating whether data is recorded in the other sector. When reproducing or recording a sector, the presence or absence of data recording in the other sector is determined by checking either the first flag section or the second flag section of the other sector. be.

[Effect]

The recording medium processing method according to the present invention is such that even if a defect occurs in the first flag section of the other sector, by checking the second flag section of one sector, it is possible to recognize whether or not data is recorded in the other sector. , accurate playback and recording becomes possible.

[Embodiments of the invention]

FIG. 1 shows a sector formant according to an embodiment of the present invention. FIG. 1 shows the details of the format of two sectors, sector N and sector N-1. The difference from the sector format of the prior art embodiment is that the flag part is Flag part A (12a
), (22a) and the flag part B (12b) of the other sector
, (22b). To explain this in terms of the format of sector N-1, the flag part A (12a) is for recording the usage status of sector N-1, that is, the sector (one sector).
If data has already been recorded in the sector, a recorded flag is written; if data has not been recorded, nothing is written. Also,
The flag section 13 (12b) indicates sector N, that is, sector N.
- It records the usage status of sector N (the other sector) following sector N, and when sector N is recorded, a recorded flag is also written in this flag section B (, L21). If sector N is unrecorded, flag section r3 (12)
nothing is written to.

Also, in sector N, flag A (22a) indicates the recording status of sector N, and flag B (22b) indicates sector N-1.
This is to record the number recording status.

FIG. 2 explains part of the operation of reproducing data from Seraph No. 8 of the recording medium 1 using the sector format according to the present invention and the operation of recording data into Seraph No. 8 of the recording medium 1.

First, during playback, read -1 for target Seraph No. 8, that is, the contents of the flag part B (12b) of the previous sector N-1 (step 101), and determine whether the recorded flag is empty ( Step 102). Since the usage status of Purpose Seraph No. 8 is recorded in this flag part B (12b), if there is a recorded flag in this flag part B (12b), the data recorded in Purpose Seraph No. 8 is recorded. Playback (step 103).

If there is no recorded flag, read the contents of flag section A (22a) of objective seraph No. 8 (step 104).
), determine whether there is a recorded flag (step 105
). If there is a recorded flag in flag section A (22a),
The data recorded in objective Seraph No. 8 is reproduced (step 103).

Furthermore, if there is no recorded flag in flag section A (22a) of target seraph No. 8, it is determined that no data is recorded in target seraph number 8, and an address error is reported to the CPU (step 106).

Although not shown in the diagram, the CP that received the address error report
U performs processing when an error occurs and corrects the directory as in the conventional embodiment.

Next, at the time of recording, the contents of the flag part B (12b) of the sector N-1 of -1 from the target seraph number 8 are read (step 201), and it is determined whether there is a recorded flag (step 202). If there is no recorded flag, target Seraph No. 8 is determined to be an unrecorded sector, and data is recorded (step 203). In this case, if there is a recorded flag, flag part A (22
The contents of a) are read (step 204), and it is determined whether there is a recorded flag (step 205).

If there is no recorded flag in flag section A (22a), data is recorded to objective seraph No. 8 (step 20).
3). If there is also a recorded flag in the flag section A (22a) of target Seraph No. 8, it is determined that Target Seraph No. 8 is a recorded sector, and a CPU hair address error is reported (step 206). C received address error report
The PU performs processing when an error occurs and corrects the directory, as in the conventional embodiment. As described above, the recording medium processing method according to the present invention increases the flag part of the sector format of the recording medium 1 from one place to two places, one of which records the usage status of the sector. , the other one is to record the usage status of the sector either before or after the sector in question, so that information indicating the usage status of each sector can be recorded for the sector in question and any sector before or after the sector in question. Therefore, even if a defect occurs in the flag section of the sector, the usage status of the sector can be recognized by checking the flag sections in other sectors.

Therefore, compared to the conventional embodiment, the operation of determining the usage status of Purpose Seraph No. 8 has increased by one time before reporting an address error to the CPU, and a defect in the flag section can easily occur. Address errors are less likely to occur. Furthermore, since it is considered that it is extremely rare for defects to occur in the same way in the flag portions of consecutive sectors, it is considered that providing two flag portions is sufficient to deal with the problem.

In the above embodiment, one of the two flag sections records the usage status of the sector in question, and the other records the usage status of the sector next to the sector in question. One location may be used for the sector immediately before the sector in question, and the same effect can be achieved.

〔Effect of the invention〕

As described above, according to the present invention, since the usage status of the other sector is recorded in the flag section of one sector, in the event that there is a defect in the flag section of the other target sector when recording or reproducing data. Even if this occurs, by reading the flag section of one sector, it is possible to determine the usage status of the other target sector, and recording and playback can be performed. This prevents double writing of data and reduction in storage capacity. It has the effect of preventing.

[Brief explanation of drawings]

FIG. 1 is a sector format diagram showing one embodiment of the present invention, FIG. 2 is a flowchart showing part of the recording and reproducing operation of one embodiment of the present invention, and FIG. 3 is a recording medium of an optical disk device. FIG. 4 is a sector formant showing a conventional embodiment, and FIG. 5 is a flowchart showing part of the recording and reproducing operations of the conventional embodiment. In the figure, 1 is a recording medium, 10.20 is a sector mark, 11.21 is an address part, and 12a. 22a is a first flag section, 12b and 22b are second flag sections, 13.23 is a sink section, and 14.24 is a data section. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent Masuo Oiwa (2 idiots) Figure 4 Figure 5

Claims (1)

[Claims] In a processing method for a recording medium having at least two sectors, each of which has a first flag portion indicating whether or not data is recorded in its own sector, one of the sectors is recorded with data in the other sector. A second flag section is provided to indicate the presence or absence of the sector, and when the other sector is played back or recorded,
It is characterized in that it is determined whether or not data is recorded in the other sector by checking either the first flag part or the second flag part in the other sector. processing method for recording media.