JP2003196924A - Real-time alternate processing method for disk and data recording method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a real-time alternate processing method for disks to avert the state that AV stream data cannot be normally recorded and a data recording method. <P>SOLUTION: A free list of a region where data can be recorded without undergoing the alternate processing is formed and after the computer data recorded by undergoing the alternate processing is deleted, the free region of a recordable size is retrieved from the formed free region list and this region is subjected to recording of the AV stream data and the upper limit of the data writing time to an HDD is disposed. When the data writing time exceeds this upper limit, the data under recording in the sector is copied into a saving buffer and thereafter ordinary record processing is executed and when the allowance time arises in the record processing, the data in the saving buffer is recorded into the alternate sector of the disk. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk real-time alternation processing method and a data recording method, and in particular, it uses a recording medium such as an optical disk, a magneto-optical disk, a magnetic disk, a hard disk drive, etc. The present invention relates to a disk real-time replacement processing method and a data recording method for performing replacement processing or recording of data that requires real-time processing.

[0002]

2. Description of the Related Art Typical examples of rewritable recording media include optical disks, magneto-optical disks, magnetic disks, and hard disk drives. These are used for data recording due to contamination on the manufacturing or disk, damage due to impact, etc. There may be a part where it becomes impossible.

Conventionally, for example, Japanese Patent Laid-Open No. 2001-2296 is used.
As disclosed in Japanese Patent Publication No. 23, the unrecordable sector generated during manufacturing is registered in the primary defect list (primary defect list: PDL), and the defective sector registered in the primary defect list during actual data recording. By skipping and recording, continuous recording of data is guaranteed.

Further, for the unrecordable sector generated after manufacturing, the recorded data is read and then the verify process is performed. If the recorded data cannot be read correctly, the sector is determined to be a defective sector. Then, the secondary defect list (secondary defect list: SDL) is registered. At the time of actual data recording, another normal sector (hereinafter referred to as a replacement sector) is assigned to the defective sector registered in the secondary defect list to guarantee continuous recording of data. Thus, the processing method of recording data in the replacement sector instead of the defective sector is called replacement processing.

As a conventional replacement process, for example, there is a method disclosed in Japanese Patent Laid-Open No. 1-243268. When recording AV stream data, the verify process is performed after reading the recorded data. If the recorded data cannot be read correctly, the sector is determined to be a defective sector, and the data to be written to the replacement area is saved in the buffer memory in block units (sector units) each time. At that time, the AV stream data write process is continuously performed without interruption, and after a series of write processes over a plurality of tracks is completed, the data of the blocks of data saved in the buffer memory is written. There is a method of collectively writing to the replacement recording area.

By using this method, it is possible to collectively rewrite the data saved after the writing of a series of data, so that the original AV stream data writing process is not interrupted. As a result of performing the writing process of the data to be written in the spare area all at once, the data processing time is significantly shortened.

[0007]

However, in the conventional replacement processing as described above, it is sufficient to handle only the AV stream data processing. For example, data (management information In a system in which personal information, e-mail, etc.) are mixed with AV stream data, the following problems that cannot be processed by conventional replacement processing may occur.

That is, in the case where the computer data is recorded by performing the alternation process, immediately after the recording area is released by deleting a file or the like, the AV stream data is recorded in the opened area and the area including the defective sector. In this case, since it is necessary to record the AV stream data by performing the replacement process, the recording process does not end within the time allowed for the real-time process, and the buffer overrun occurs.
There may occur a situation where stream data cannot be recorded normally.

Therefore, the main object of the present invention is to prevent the recording process from being completed within the time allowed for the real-time processing, and to cause the buffer overrun.
It is an object of the present invention to provide a disk real-time replacement processing method and a data recording method capable of avoiding a situation where stream data cannot be normally recorded.

[0010]

SUMMARY OF THE INVENTION According to the present invention, in a disk recording apparatus for performing real-time processing such as AV stream data, a write time over time, which is an upper limit of the time for writing data to the disk, is provided to write data. If the time exceeds the write time-out time, the data currently being recorded in that sector is copied to the save buffer, and then the normal recording process is executed. The above data is written in an alternate sector of the disk.

In another aspect of the invention, in a disc recording apparatus for performing real-time processing such as AV stream data, a write time over time which is the upper limit of the data writing time to the disc is provided, and the data writing time exceeds the write time. As with the case where the time is exceeded, verify processing is performed after reading the recorded data, and for the defective sector where the recorded data could not be read correctly, the data being recorded in that sector is copied to the save buffer. After that, a normal recording process is executed thereafter, and the data in the save buffer is written to the spare sector of the disk when the recording process has an extra time.

As described above, since it is necessary to record the AV stream data by performing the alternation process, the recording process does not end within the time allowed for performing the real-time process, and the buffer overrun occurs. , AV
It is possible to avoid the situation where the stream data cannot be normally recorded, and it is possible to guarantee each data recording even in a system in which AV stream data and computer data that require real-time processing are mixed.

Further, in a system in which a computer simultaneously records AV stream data which requires real-time processing, the computer data recorded by the alternation processing is released by deleting a file from the area where the computer data is recorded. Immediately after the recording, when the AV stream data is recorded in the area and the area including the defective sector, the recording processing is not completed within the time allowed for the real-time processing, and the AV stream data cannot be normally recorded. In order to avoid the problem, a write time-over time, which is the upper limit of the data write time to the disk, is provided, and processing is performed when the data write time exceeds the write time-over time.

Still another aspect of the present invention is a system for simultaneously recording computer data in addition to AV stream data, in which computer data recorded by performing a replacement process is released from a recording area by deleting a file or the like. Immediately after the recording, when the AV stream data is recorded in the area and the area including the defective sector, the recording processing is not completed within the time allowed for the real-time processing, and the AV stream data cannot be normally recorded. In order to avoid such a problem, a free area list that can be recorded without performing replacement processing is created based on the primary defect list and the secondary defect list on the disc, and recorded from the free area list. By searching for possible areas and recording AV stream data, real time Characterized that it is possible to perform the recording process.

[0015]

1 is a block diagram showing the configuration of a system for recording AV stream data of digital broadcasting on a hard disk drive according to an embodiment of the present invention. In FIG. 1, a tuner 1 receives a digital broadcast via an antenna and gives its reception output to a PID filter 2. The PID filter 2 receives the desired A from the received signal.
The V stream data is extracted and given to the data buffer 3. The data buffer 3 stores the extracted AV stream data. The save buffer 4 temporarily stores AV stream data in order to perform the replacement process, and the buffer controller 5 controls the data buffer 3 and the save buffer 4. The AV stream data accumulated in the data buffer 3 is stored in the hard disk (H
DD) 6.

During normal recording, the tuner 1 receives the digital broadcast, the PID filter 2 filters the desired AV stream data, and the desired AV stream data is extracted and then stored in the data buffer 3 in units of 256 sectors, for example. The flow is such that each data is recorded in the HDD 6.

FIG. 2 is a flow chart showing an exchange processing method according to an embodiment of the present invention, and FIG. 3 is a diagram showing an example of creating a free area list.

Next, the specific operation of the embodiment of the present invention will be described with reference to FIGS. First, each piece of information required when the writing time over occurs is acquired and created. That is, in step (abbreviated as SP in the figure) SP1, the primary defect list and the secondary defect list are read from the HDD 6 to obtain the information of the unrecordable sector of the HDD. Next, in step SP2, a list of sector areas that can be recorded without replacement processing is created based on the primary defect list and the secondary defect list read out earlier. Hereinafter, this list will be referred to as a free area list. As shown in FIG. 3, the free area list has information indicating which sectors are normal sector areas, and information on the size of the normal sector areas.

Next, in step SP3, it is determined whether or not the computer data recorded by performing the replacement process has been released from the area where the computer data is recorded by deleting a file or the like, and if the data has been deleted, the step is performed. SP
At 4, it is confirmed whether AV stream data recording processing is being performed. If the recording process is performed, the size of the AV stream data to be recorded is acquired in step SP5. In the case of the embodiment being described, the unit data for recording AV stream data is the data size in this case.

Next, in step SP6, using the free area list created in step SP2, is there a sector area in which the AV stream data of the size obtained in step SP5 can be recorded in the HDD 6 without replacement processing? Search whether or not. In step SP7, if a sector area that can be recorded without performing replacement processing is found in the free area list, AV stream data is recorded in this area in step SP8, and the process returns to step SP1. If no recordable sector area is found from the free area list, the write time-out will occur in step SP9. In this case, the process according to the flowchart shown in FIG. 4 is performed.

FIG. 4 is a diagram showing a flow chart in the case where a writing time over time of the recording process for the disc is provided. In FIG. 4, normally, the AV extracted by the PID filtering in step SP21.
Data is sequentially recorded from the data buffer 3 accumulating stream data to the HDD 6 for each unit data.
In step SP22, it is determined whether or not the recording processing time of the arbitrary unit data has exceeded the preset write time-out time. If the write time-out has occurred, recording is performed in the HDD 6 in step SP23. The unit data that has been saved is copied to the save buffer 4. After that, the normal recording process is started from the next unit data copied to the save buffer 4, and the recording process from the data buffer 3 to the HDD 6 is sequentially performed in step SP24. Since it is necessary to perform real-time processing for recording AV stream data, if it is determined in step SP25 that there is enough processing time, the recording processing from the save buffer 4 to the exchange area of the HDD 6 is normal recording in step SP26. It is carried out in anticipation of time when processing is available.

FIG. 5 is a conceptual diagram of an exchange process when a write time-out occurs during recording of data 2. After the write time over, the data 2 is saved in the save buffer 4
The data 3 is recorded in the HDD 6 as usual. The data 2 is recorded in the replacement area of the HDD 6 in view of the recovery time of the normal recording process.

The embodiments disclosed this time are to be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description but by the claims, and is intended to include meanings equivalent to the claims and all modifications within the scope.

[0024]

As described above, according to the present invention, in the case where the computer data is recorded by the replacement process, the area and the defective sector are included immediately after the area is opened by deleting the file. AV in the area
When recording stream data, it is necessary to record the AV stream data by performing a replacement process. Therefore, the recording process does not end within the time allowed for the real-time process, and a buffer overrun occurs. However, it is possible to avoid the situation where AV stream data cannot be recorded normally, and it is possible to guarantee each data recording even in a system in which AV stream data and computer data that require real-time processing are mixed. .

[Brief description of drawings]

FIG. 1 is a block diagram of a system for recording AV stream data of digital broadcasting in an HDD according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the exchange processing method according to the embodiment of the present invention.

FIG. 3 is a diagram showing an example of creating a free area list.

FIG. 4 is a flowchart showing a replacement processing method when a write time-over time of a recording process for a disc is provided.

FIG. 5 is a conceptual diagram of the exchange processing method of the present invention.

[Explanation of symbols]

1 tuner, 2 PID filter, 3 data buffer, 4 save buffer, 5 buffer controller, 6
HDD.

Continued front page    (72) Inventor Ryoji Ohno             22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka             Inside the company F-term (reference) 5D044 AB02 AB05 AB07 BC01 BC04                       CC04 DE11 DE62 EF03 HH02

Claims (4)

[Claims] 1. A disk recording apparatus for performing real-time processing such as AV stream data, wherein a write time-over time, which is an upper limit of data write time to a disk, is provided, and the data write time is set to the write time-over time. When it exceeds the limit, the data being recorded in the sector is copied to the save buffer, then the normal recording process is executed, and the data in the save buffer is saved in the disc when the recording process has a margin. A real-time replacement processing method for a disk, which is characterized by writing in a replacement sector. 2. A disc recording apparatus for performing real-time processing such as AV stream data, wherein a write time-over time which is an upper limit of data writing time to the disc is provided, and the data write time is set to the write time-over time. As in the case of exceeding, after verifying the recorded data after reading the recorded data, for the defective sector where the recorded data could not be read correctly, copy the data being recorded in that sector to the save buffer. ,
Thereafter, a normal recording process is executed, and when the recording process has an extra time, the data in the save buffer is written in the replacement sector of the disc, and the real-time replacement process method of the disc. 3. In a system in which not only AV stream data that requires real-time processing but also a computer is recorded at the same time, exchange processing is performed to release the computer data from the area in which the recorded computer data is recorded by deleting a file or the like. Immediately after the writing, A
In order to avoid the problem that the AV stream data cannot be normally recorded when the V stream data is recorded, the recording process does not end within the time allowed for the real-time processing, and the AV stream data cannot be normally recorded. The write time over time, which is the upper limit of the data write time, is set,
3. The disk real-time replacement processing method according to claim 2, wherein the processing is performed when the data writing time exceeds the writing time-over time. 4. A system for simultaneously recording computer data in addition to AV stream data, immediately after releasing the computer data recorded by exchange processing from the recording area by deleting a file or the like. When the AV stream data is recorded in the area including the area and the defective sector, the recording process does not end within the time allowed for the real-time processing, and the AV stream data cannot be normally recorded. In order to avoid, based on the primary defect list and secondary defect list on the disk,
A free area list that can be recorded without performing exchange processing is created, a recordable area is searched from the free area list, and recording processing is performed in real time by recording the AV stream data. A method of recording data on a disc, which is capable of