JP2003178532A - Video recording apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video recording apparatus that can enhance the reliability of data without the need for shifting data of a sector with a high ECC error correction level to an alternate sector. <P>SOLUTION: The video recording apparatus includes: a read/write section 2 that records video data to a hard disk 1 having a video storage area being an area to which storage video data are recorded and a temporary buffer area being an area to which video data are temporarily recorded and reads video data from the hard disk 1; an ECC error correction section 3 that applies ECC error correction processing to the video data read from the read/write section 2; an error correction level discrimination section 4 that discriminates whether or not the error correction level by the ECC correction level by the ECC error correction section 3 is a prescribed threshold or over by each sector; and a control section 6 that controls recording of the video data so as to use a sector whose error correction level is discriminated to be a prescribed threshold or over by the error correction level discrimination section 4 for the temporary buffer area. <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 video recording device for recording video data on a recording medium such as a hard disk.

[0002]

2. Description of the Related Art Conventionally, when data is read from a hard disk or the like, error correction is performed by an error correction function of ECC. By performing this error correction, high reliability of the data could be secured.

[0003]

[Problems to be Solved by the Invention] However, the ECC
If the sector in which data that can be read and written normally is corrected by the error correction function of, if the number of error locations in that sector increases, error correction will not be possible and that sector will not Defective sector (sector that cannot be read or written normally)
Is likely to become. Therefore, if such a sector is continuously used, there is a problem that the reliability of data is deteriorated.

In order to solve the problem, the sector which can be normally read / written by performing error correction by the error correction function of ECC is used as it is, and the data of the sector which is highly likely to become a defective sector in the future is moved to the replacement sector. It was also done.

FIG. 16 is a diagram for explaining the operation of the conventional video recording apparatus for moving the data of a sector which is highly likely to become a defective sector to a replacement sector. As shown in FIG. 16, the ECC is recorded in the area where the video data is recorded.
If there is a sector in which the data whose error correction level is above a certain level is recorded, the data in that sector is moved to the replacement sector. By doing so, it has been possible to prevent a part of the area where the video data is recorded from becoming a defective sector.

[0006] However, if a sector that may become a defective sector is used by replacing it with a replacement sector, the number of replacement sectors prepared in advance is finite, so the number of replacement sectors is reduced. . Then, when the prepared replacement sector finally runs out, the replacement sector is secured in the normal data recording area, which causes a problem that the recording area of the recording medium such as a hard disk is reduced.

The present invention has been made to solve the above-mentioned problems, and causes the reduction of the data recording area of the recording medium by moving the data of the sector having a high ECC error correction level to the replacement sector. It is an object of the present invention to provide a video recording device that can improve the reliability of data.

[0008]

In order to achieve the above object, a video recording apparatus according to the present invention has a video storage area in which video data for storage is recorded, and video data is temporarily recorded. In a video recording apparatus for recording video data on a recording medium having a temporary buffer area which is an area, the video data is recorded on the recording medium and the read / write means for reading the video data from the recording medium and the read / write means Error correction means for performing ECC error correction processing on the output video data, and error correction level determination means for determining whether or not the error correction level by the error correction means is equal to or higher than a predetermined threshold value for each sector. And a sector whose error correction level is determined to be equal to or higher than a predetermined threshold value by the error correction level determination means. And control means for controlling recording of image data used as Nporaribaffa region, is characterized in that it comprises a.

Further, in the video recording apparatus according to the present invention, in the video recording apparatus, the control means corrects an error in a predetermined sector in the video storage area after the storage video data is recorded in the video storage area. When the level becomes equal to or higher than a predetermined threshold value, the sector and the sector in the temporary buffer area whose error correction level is lower than the predetermined threshold value are controlled to be exchanged with each other.

Further, in the video recording apparatus according to the present invention, in the video recording apparatus, the control means includes a predetermined sector including a sector around a sector whose error correction level is determined to be a predetermined threshold value or more. It is characterized in that it is controlled so as to be used as a temporary buffer area in block units.

The video recording apparatus according to the present invention is a video recording apparatus for recording video data on a recording medium, wherein the video data is recorded on the recording medium and the video data is read from the recording medium. EC for the video data read by the read / write means
C error correction means for performing error correction processing, error correction level determination means for determining for each sector whether the error correction level by the error correction means is greater than or equal to a predetermined threshold, and video data having a high bit rate When recording, the video data recording is controlled so that the video data having a high bit rate is not recorded in the sector whose error correction level is determined to be equal to or higher than a predetermined threshold value by the error correction level determination means. And a control means.

Further, in the video recording apparatus according to the present invention, in the video recording apparatus, the control means, after the video data having a high bit rate is recorded on the recording medium, a predetermined area in which the video data is recorded. When the error correction level of the sector is above a predetermined threshold,
It is characterized in that the sector or the area including the sector is controlled to be moved to an unused area whose error correction level is lower than a predetermined threshold value.

Further, in the video recording apparatus according to the present invention, in the video recording apparatus, the control means, after the video data having a high bit rate is recorded on the recording medium, a predetermined area in which the video data is recorded. When the error correction level of the sector is above a predetermined threshold,
Control is performed so that the sector or an area including the sector and an area in which video data having a lower bit rate than the video data having a higher bit rate is recorded and the error correction level is lower than a predetermined threshold value are exchanged. It is characterized by.

The video recording apparatus according to the present invention is a video recording apparatus for recording video data on a recording medium, wherein the video data is recorded on the recording medium and the video data is read from the recording medium. EC for the video data read by the read / write means
C error correction means for performing error correction processing, error correction level determination means for determining for each sector whether or not the error correction level by the error correction means is greater than or equal to a predetermined threshold value, and based on user preference information When recording high priority video data, do not record the high priority video data in a sector whose error correction level is determined to be equal to or higher than a predetermined threshold value by the error correction level determination means. And a control means for controlling recording of video data.

Further, in the video recording apparatus according to the present invention, in the video recording apparatus, the control means is provided in an area where the video data is recorded after the video data having the higher priority is recorded in the recording medium. If the error correction level of a given sector exceeds a given threshold,
It is characterized in that the sector or the area including the sector is controlled to be moved to an unused area whose error correction level is lower than a predetermined threshold value.

Further, in the video recording apparatus according to the present invention, in the video recording apparatus, the control means is provided in an area where the video data is recorded after the video data having the high priority is recorded in the recording medium. If the error correction level of a given sector exceeds a given threshold,
Control is performed so that the sector or an area including the sector and an area in which video data having a lower priority than the video data having a higher priority is recorded and the error correction level is lower than a predetermined threshold value are exchanged. It is characterized by.

The video recording apparatus according to the present invention is a video recording apparatus for recording video data on a recording medium and control data necessary for controlling reproduction of the video data, and recording the data on the recording medium. A read / write means for reading data from the recording medium; an error correction means for performing an ECC error correction process on the data read by the read / write means; and an error correction level by the error correction means of a predetermined threshold value or more. And a sector for which the error correction level is determined to be equal to or higher than a predetermined threshold by the error correction level determination means when recording the control data. And a control means for controlling the recording of the data so that the control data is not recorded. Than it is.

Also, in the video recording apparatus according to the present invention, in the video recording apparatus, the control means stores a predetermined sector in an area where the control data is recorded after the control data is recorded in the recording medium. When the error correction level becomes equal to or higher than a predetermined threshold value, the sector or the area including the sector is controlled to be moved to an unused area whose error correction level is lower than the predetermined threshold value. It is what

Also, in the video recording apparatus according to the present invention, in the video recording apparatus, the control means stores a predetermined sector in an area in which the control data is recorded after the control data is recorded in the recording medium. When the error correction level is equal to or higher than a predetermined threshold value, the sector or the area including the sector and the area where the video data is recorded and the error correction level is lower than the predetermined threshold value are exchanged. It is characterized by controlling to.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A video recording apparatus according to the first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the video recording apparatus according to the first embodiment. The hard disk 1 has a video storage area, which is an area in which video data for storage is recorded, and a temporary buffer area, which is an area in which video data is temporarily recorded. The temporary buffer area is an area where video data that is not for storage is frequently recorded and read. For example, by using the temporary buffer area like a ring buffer, a broadcast program that the user wants to watch is recorded for about 10 minutes, and the video is reproduced with a delay of about 10 minutes from the time when it is currently received. The user can watch the currently received broadcast program with a delay of 10 minutes. Here, dividing the hard disk 1 into a video storage area and a temporary buffer area is logical, not physical. Therefore, it is possible to change those areas, and it is also possible to arbitrarily replace a part of these areas.

The read / write unit 2 reads data from the hard disk 1 and records the data in the hard disk 1. The ECC error correction unit 3 uses the hard disk 1
ECC error correction processing is performed on the video data read from the. The error correction level determination unit 4 determines, for each sector, whether the error correction level is equal to or higher than a predetermined threshold value. The error sector storage unit 5 stores the position of a sector whose error correction level is equal to or higher than a predetermined threshold value. The control unit 6 controls recording of video data so that the sector at the position stored by the error sector storage unit 5 is used as a temporary buffer area. The data buffer 7 temporarily stores data.

Next, the operation of the video recording apparatus according to the first embodiment will be described. First, at the time of reading video data, the reading / writing unit 2 reads the video data from the video storage area of the hard disk 1 and sends it to the ECC error correction unit 3. The ECC error correction unit 3 performs an ECC error correction process on the video data from the read / write unit 2. The error correction process is performed for each sector, and errors such as garbled bits up to a predetermined bit (for example, 5 bits) of the sector can be corrected. ECC error correction unit 3
The video data subjected to the error correction processing is sent to a data processing circuit (not shown), subjected to predetermined processing, and output to a monitor or the like.

The error correction level determination unit 4 determines whether the error correction level by the ECC error correction unit 3 is equal to or higher than a predetermined threshold value. If the error correction level is equal to or higher than the threshold value, the sector of the sector is corrected. The position information indicating the position is output to the error sector storage unit 5, and the error sector storage unit 5 stores the position information. Here, the error correction level indicates, for example, how many bits of the 5 bits are in error when the ECC error correction unit 3 performs error correction of up to 5 bits for each sector. Then, if the threshold value of the error correction level is set to 3 bits,
A sector having an error of 3 bits or more is determined to be a sector having a high error correction level, and its position information is stored in the error sector storage unit 5.

Next, at the time of recording the video data, the reading / writing section 2 records the video data input through a path (not shown) in the hard disk 1. At this time, the control unit 6 refers to the error sector storage unit 5 to extract the position information of the sector whose error correction level is equal to or higher than a predetermined threshold value, and preferentially uses the sector as a temporary buffer area. The read / write unit 2 is controlled so as to do so. That is, as shown in FIG. 2, when the read / write unit 2 records video data for storage, control is performed so that the video data is recorded in a sector other than the sector indicated by the position information in the error sector storage unit 5. When temporarily recording the video data, the video data is controlled to be recorded in the sector of the temporary buffer area including the sector indicated by the position information of the error sector storage unit 5. Since the temporary buffer area has a faster rewrite cycle than the video storage area, the error correction level is frequently checked, and the error correction level is frequently checked. Then, when the error correction level of the temporary buffer area becomes higher, the replacement process may be performed just before the defective sector as in the conventional example.

After the recording of the video data, the recorded video data is read out as a confirmation process for enhancing the reliability, the error correction level is judged, and if there is a sector whose error correction level is equal to or higher than the threshold, The position information of the sector may be recorded in the error sector storage unit 5. The error correction level of a predetermined sector in the video storage area is set to a predetermined threshold value by this confirmation process or by normal reproduction of the storage video data after the storage video data is recorded in the video storage area. When the control unit 6 detects that the above has been reached, if there is a sector whose error correction level is not higher than a predetermined threshold value among the sectors in the temporary buffer area, as shown in FIG. You may exchange the sector whose level became more than a predetermined threshold.

Specifically, the error correction level determination unit 4 detects a predetermined sector (denoted as sector A) in the video storage area by reading video data during confirmation processing or during normal reproduction and ECC error correction. When it is determined that the error correction level is equal to or higher than the predetermined threshold value, the position information of the sector is recorded in the error sector storage unit 5. Further, the control unit 6 causes the data buffer 7 to temporarily store the video data of the sector A read by the read / write unit 2 and error-corrected by the ECC error correction unit 3.
Then, the control unit 6 stores the data stored in the data buffer 7 via the read / write unit 2 among the sectors in the temporary buffer area, the sector whose error correction level is not higher than a predetermined threshold, that is, the error sector storage. Writing is performed in a sector (referred to as sector B) in which position information is not recorded in the section 5. Then, the sector A is used as a temporary buffer area and the sector B is used as a video storage area. By this processing, the sector that was the temporary buffer area becomes the video storage area, and the sector that was the video storage area becomes the temporary buffer area. The data in sector B may be recorded in sector A before writing the data stored in data buffer 7 in sector B.

As described above, according to the video recording apparatus in the first embodiment, the video data is recorded in the hard disk 1, and the read / write section 2 for reading the video data recorded in the hard disk 1 and the read / write section 2 are used. An ECC error correction unit 3 that performs an ECC error correction process on the read video data, and an ECC error correction unit 3
Error correction level determination unit 4 for determining for each sector whether the error correction level by the above is greater than or equal to a predetermined threshold value.
And the control unit 6 for controlling the recording of the video data so that the sector whose error correction level is determined to be equal to or higher than the predetermined threshold value is used as the temporary buffer area. Although a sector with a high error correction level is not used during recording, the sector with a high error correction level that was not used is used as a temporary buffer area, so that the reliability of data is improved without reducing the recording area of the hard disk 1. Can be increased.

In the first embodiment, it has been described that the sector having a high error correction level is used as the temporary buffer area on a sector-by-sector basis. Good. For example, the temporary buffer area may be set in cluster units, which is a set of a plurality of sectors. By doing so, it is possible to reduce the deterioration of the read performance during continuous access due to the discontinuity of data.

(Second Embodiment) A video recording apparatus according to a second embodiment of the present invention will be described below with reference to the drawings. FIG. 4 is a block diagram showing the configuration of the video recording device according to the second embodiment. The configuration and operation other than those related to the hard disk 11 and the control unit 12 are the same as those in the first embodiment, and the description thereof will be omitted.

The hard disk 11 is a disk-shaped recording medium on which video data is recorded. When recording video data having a bit rate higher than a predetermined constant value, the control unit 12 stores the error sector storage unit 5
The recording of the video data is controlled so that the video data having a high bit rate is not recorded in the sector stored by.

Next, the operation of the video recording apparatus according to the second embodiment will be described. The operation until the position information of the sector whose error correction level is equal to or higher than the predetermined threshold value is stored in the error sector storage unit 5 is similar to that of the first embodiment, and the description thereof is omitted.

When the read / write unit 2 records video data having a bit rate higher than a constant value preset in the control unit 12 on the hard disk 11, the control unit 12 detects this by a route not shown, By referring to the error sector storage unit 5, the position information of the sector whose error correction level is equal to or higher than a predetermined threshold value is taken out, and as shown in FIG. 5, the read / write unit is arranged so as not to record the video data in the sector. Control 2 Here, the area for recording video data with a high bit rate is
It may be secured in a continuous region that does not include a region having a high error correction level, or may be secured in a plurality of regions. Also, before recording this video data, first record dummy data in the area reserved for recording, then read the dummy data and perform error correction processing, so that the sector with a high error correction level The safety may be improved by confirming whether the area is not included in the secured area. In this case, if a sector with a high error correction level is found, a new area for recording is retaken.

After recording video data having a bit rate higher than a set fixed value, the recorded video data is read out as a confirmation process for improving reliability, the error correction level is determined, and the error correction is performed. If there is a sector whose level is equal to or higher than the threshold value, the position information of the sector may be recorded in the error sector storage unit 5. Then, by this confirmation processing or by the normal reproduction of the video data, it is controlled that the error correction level of the predetermined sector in the area where the video data having the high bit rate is recorded becomes equal to or higher than the predetermined threshold value. When the section 12 detects, as shown in FIG.
Alternatively, the area including the sector (for example, all the video data having a high bit rate) may be controlled to be moved to an unused area whose error correction level is lower than a predetermined threshold value. Whether or not the error correction level of this unused area is lower than a predetermined threshold value can be determined by checking the error sector storage unit 5 when, for example, video data has been recorded in the unused area in the past. If not, the dummy data can be confirmed by recording the dummy data in the unused area, reading the dummy data, and performing the error correction process. The bit rate of the video data recorded on the hard disk 11 is
Can be known by looking at the bit rate included in the control information of the video data recorded in the predetermined area or other recording medium, or by looking at the header of the video data.

Further, the control unit 12 determines the error correction level of a predetermined sector in a region in which the video data having a high bit rate is recorded by the confirmation process or the normal reproduction of the video data. When the control unit 12 detects that the threshold value is exceeded, as shown in FIG. 7, the sector, or the area including the sector, and the bit rate higher than the bit rate value of the video data having the high bit rate. The control may be performed so as to replace the area in which the video data having a low rate is recorded and the error correction level is lower than a predetermined threshold value. Here, if there is no storage area for video data with a low bit rate equal to or higher than the area including the sector with a high error correction level, an area including a sector with a high error correction level,
A plurality of storage areas for video data having a low bit rate may be replaced.

As described above, according to the video recording apparatus of the second embodiment, the video data is recorded on the hard disk 11 and the video data is read from the hard disk 11 and read by the read / write section 2. E to perform ECC error correction processing on video data
The CC error correction unit 3, the error correction level determination unit 4 that determines whether the error correction level by the ECC error correction unit 3 is equal to or higher than a predetermined threshold value, and the video data having a high bit rate is recorded. In this case, the control unit that controls the recording of the video data so that the video data with a high bit rate is not recorded in the sector whose error correction level is determined to be equal to or higher than the predetermined threshold value by the error correction level determination unit 4. 12 is provided, it is possible to obtain an effect that it is possible to reduce the possibility that the image quality is deteriorated due to the occurrence of a defective sector with respect to the image data having a high bit rate, which requires a high image quality.

Further, the data recording area of the hard disk 11 is reduced by recording video data having a low bit rate, which is less affected even if it becomes a defective sector in the future, in a sector whose ECC error correction level is equal to or higher than the threshold value. The reliability of the data can be improved without doing so.

The hard disk 11 may or may not have the temporary buffer area described in the first embodiment. However, when the hard disk 11 has the temporary buffer area, the temporary buffer area is not provided. In all of the above cases, the control as described in the second embodiment may be performed when the error correction level is in the sector above the threshold value.

(Third Embodiment) A video recording apparatus according to a third embodiment of the present invention will be described below with reference to the drawings. FIG. 8 is a block diagram showing the configuration of the video recording device according to the third embodiment. The configuration and operation other than those related to the user preference information storage unit 21 and the control unit 22 are the same as those in the second embodiment, and the description thereof will be omitted.

The user preference information storage unit 21 stores the EPG.
Programs that users view based on (electronic program guide),
Alternatively, when a program or the like to be recorded is selected, user preference information regarding the broadcast program such as the title, genre, and actors of the selected program is accumulated by a route (not shown).

The control unit 22 includes a user preference information storage unit 21.
When high-priority video data based on the user's preference information accumulated in is recorded, the sector whose error correction level is determined to be equal to or higher than a predetermined threshold by the error correction level determination unit 4 is recorded in the sector. The recording of the video data is controlled so as not to record the video data of high priority.

Next, the operation of the video recording apparatus according to the third embodiment will be described. The operation until the position information of the sector whose error correction level is equal to or higher than the predetermined threshold value is stored in the error sector storage unit 5 is similar to that of the second embodiment, and the description thereof is omitted.

When the read / write unit 2 records the video data on the hard disk 11, the control unit 22 determines the priority of the video data. Specifically, information such as the title and genre of the recorded video data is acquired through a route (not shown), and the information is compared with the information stored in the user preference information storage unit 21. Then, among the titles, genres, and the like, when items equal to or greater than a certain value set in advance in the control unit 22 match, it is determined that the priority is high, and only items less than the certain value match. If not, it is determined that the priority is low. Then, when the priority of the video data to be recorded is high, as shown in FIG. 9, the control unit 22 causes an error similar to the case where the control unit 12 according to the second embodiment records the video data with a high bit rate. Recording is controlled so that video data having a high priority is not recorded in a sector whose correction level is equal to or higher than a predetermined threshold value. The operation in this case is similar to that of the second embodiment, and the description thereof is omitted.

Further, when the error correction level of a predetermined sector in the area in which the video data of high priority is recorded becomes equal to or higher than a predetermined threshold value, the sector or the area including the sector is error-corrected. The process of moving to an unused area whose level is lower than a predetermined threshold, or that sector, or an area containing that sector, and video data with a lower priority than the priority of video data with a high priority are recorded. As for the processing for exchanging an area in which the error correction level is lower than a predetermined threshold value, as shown in FIGS. 10 and 11,
The operation is the same as that of the second embodiment except that the video data having a high bit rate becomes the video data having a high priority and the video data having a low bit rate becomes the video data having a low priority, and the description thereof will be omitted. . Here, the information such as the title and genre of the video data recorded on the hard disk 11 can be obtained by observing the management information about the title and genre recorded on a predetermined area of the hard disk 11 or another recording medium.
Alternatively, it can be known by looking at the header of the video data.

As described above, according to the video recording apparatus of the third embodiment, the video data is recorded in the hard disk 11 and the video data is read from the hard disk 11 and read by the read / write section 2. E to perform ECC error correction processing on video data
The CC error correction unit 3, the error correction level determination unit 4 that determines whether the error correction level by the ECC error correction unit 3 is equal to or higher than a predetermined threshold value, and the priority based on user preference information. When recording high-priority video data, the high-priority video data is recorded so that the high-priority video data is not recorded in a sector whose error correction level is determined to be equal to or higher than a predetermined threshold by the error correction level determination unit 4. By providing the control unit 22 for controlling the recording, it is possible to obtain an effect that it is possible to reduce the possibility that the image quality is deteriorated due to the occurrence of the defective sector with respect to the data having a high priority based on the user preference information. To be

Further, the data recording area of the hard disk 11 is reduced by recording the video data of low priority, which is less affected even if it becomes a defective sector in the future, in the sector whose ECC error correction level is higher than the threshold value. The reliability of the data can be improved without doing so.

In the third embodiment, it has been described that the user preference information is stored in the user preference information storage unit 21 when the user selects a program based on the EPG, but the user preference information storage unit is described. 21 may allow the user to directly input the preference information.

Regarding the determination of the priority order of the video data based on the user's preference information accumulated in the user preference information accumulating section 21, the user's preference or its preference is given for each item other than the above description. Weighting may be performed based on the number of viewing / recording times and viewing / recording time of the program corresponding to the item, and the determination may be made in consideration of the weight. For example, when the user has an actor A who is an enthusiastic fan, and when the item “actor A” is weighted more than other items, the matching item is only “actor A”. Even in such a case, the video data may be determined to have a high priority.

(Embodiment 4) A video recording apparatus according to Embodiment 4 of the present invention will be described below with reference to the drawings. The data stored by a video recording device such as a hard disk recorder can be roughly divided into video data and control data necessary for controlling the playback of the video data. When a defective sector occurs in the area where the video data is recorded, noise may be included in the reproduced video or the video may be skipped. On the other hand, when a defective sector occurs in the area where the control data is recorded, the video data cannot be reproduced at worst. Therefore, the fourth embodiment
The video recording apparatus according to (1) does not record the control data in a sector having a high error correction level.

FIG. 12 is a block diagram showing the structure of the video recording apparatus according to the fourth embodiment. The control unit 31
The configuration and operation other than those related to the second embodiment are the same as those of the second embodiment, and thus the description thereof is omitted.

When recording the control data, the control unit 31 writes the control data to the sector whose error correction level is determined to be equal to or higher than the predetermined threshold value by the error correction level determination unit 4.
The data recording is controlled so that the control data is not recorded. Here, the control data means reproduction of video data such as a start position address of video data recorded on the hard disk 11, a total data capacity of the video data, an address of an area in which a title, a genre, and a recording date and time are recorded. It is the data required for time control. When the read / write unit 2 records data on the hard disk 11, the video data and the control data are recorded in different files.

Next, the operation of the video recording apparatus according to the fourth embodiment will be described. The operation until the position information of the sector whose error correction level is equal to or higher than the predetermined threshold value is stored in the error sector storage unit 5 is similar to that of the second embodiment, and the description thereof is omitted.

When the read / write unit 2 records data on the hard disk 11, the control unit 31 determines whether the data is video data or control data by a path (not shown). Then, when the data to be recorded is the control data, as shown in FIG.
1 is recorded so that the control data is not recorded in a sector whose error correction level is equal to or higher than a predetermined threshold value, as in the case where the control unit 12 according to the second embodiment records video data having a high bit rate. To control. The operation in this case is similar to that of the second embodiment, and the description thereof is omitted. Note that, in FIG. 13, the video data is not recorded in the sector whose error correction level is equal to or higher than the predetermined threshold value. However, in the fourth embodiment, the video data has the error correction level equal to or higher than the predetermined threshold value. May be recorded in a sector.

Further, when the error correction level of a predetermined sector in the area where the control data is recorded becomes equal to or higher than a predetermined threshold value, the sector or the area including the sector has a predetermined error correction level. The process of moving to an unused area lower than the threshold value, or the sector or the area including the sector, and the area where the video data is recorded and the error correction level is lower than the predetermined threshold value. Figure 1 shows the process of replacing
4 and FIG. 15, the operation is the same as that of the second embodiment except that the video data having a high bit rate becomes the control data and the video data having a low bit rate becomes the normal video data. The description is omitted.

As described above, according to the video recording apparatus of the fourth embodiment, the data is recorded on the hard disk 11 and the read / write section 2 for reading the data from the hard disk 11 and the data read by the read / write section 2 are used. On the other hand, an ECC error correction unit 3 that performs an ECC error correction process, and an error correction level determination unit 4 that determines whether or not the error correction level by the ECC error correction unit 3 is a predetermined threshold value or more for each sector. When recording the control data, the control unit 31 that controls the recording of the data so that the control data is not recorded in the sector whose error correction level is determined to be equal to or higher than the predetermined threshold value by the error correction level determination unit 4. By providing a control data recording area, a defective sector may occur in the control data recording area, preventing video data from being reproduced. Effect can be prevented is obtained.

Further, by recording video data, which has little influence even if it becomes a defective sector in the future, in the sector whose ECC error correction level is equal to or higher than the threshold value, the hard disk 1
The reliability of data can be improved without reducing the data recording area of No. 1.

In each of the above-described embodiments, it has been described that data is recorded on the hard disks 1 and 11, but even with recording media other than the hard disks 1 and 11, data is managed in sectors and read data is EC
If the recording medium is capable of C error correction, data may be recorded on the recording medium.

[0057]

As is apparent from the above description, according to the video recording apparatus of the present invention, the video storage area which is the area where the video data for storage is recorded and the video data is temporarily recorded. In a video recording apparatus for recording video data on a recording medium having a temporary buffer area which is an area, while recording the video data on the recording medium, a read / write means for reading the video data from the recording medium, and a read / write means for reading / writing by the read / write means Error correction means for performing ECC error correction processing on the output video data, and error correction level determination means for determining whether or not the error correction level by the error correction means is equal to or higher than a predetermined threshold value for each sector. Then, the sector whose error correction level is determined to be equal to or higher than a predetermined threshold by the error correction level determination means is tested. A sector that is not a defective sector at present but has a high ECC error correction level and is likely to become a defective sector in the future by including control means for controlling recording of video data to be used as a polari buffer area. By using as a temporary buffer area, video data to be stored for a long time can be stored in a sector having a low ECC error correction level without reducing the recording area of the recording medium, and the reliability of this video data can be improved. it can.

According to the video recording apparatus of the present invention, in the video recording apparatus for recording the video data on the recording medium, the video data is recorded on the recording medium, and
A read / write means for reading video data from the recording medium; and an error correction means for performing an ECC error correction process on the video data read by the read / write means,
An error correction level determination means for determining whether or not the error correction level by the error correction means is equal to or higher than a predetermined threshold value, and an error correction level determination means for recording video data having a high bit rate. By the provision of the control means for controlling the recording of the video data so as not to record the video data having the high bit rate in the sector whose error correction level is determined to be equal to or higher than the predetermined threshold by To reduce the recording area of the recording medium by not allocating sectors with high ECC error correction level and high possibility of becoming defective sectors in the future to video data with high bit rate requiring high quality. The reliability of this video data can be improved.

According to the video recording apparatus of the present invention, in the video recording apparatus for recording the video data on the recording medium, the video data is recorded on the recording medium, and
A read / write means for reading video data from the recording medium; and an error correction means for performing an ECC error correction process on the video data read by the read / write means,
Error correction level determination means for determining for each sector whether or not the error correction level by the error correction means is greater than or equal to a predetermined threshold value, and when recording high priority video data based on user preference information Controlling means for controlling recording of the video data so as not to record the video data having a higher priority in the sector whose error correction level is judged to be equal to or higher than a predetermined threshold by the error correction level judging means. With the provision of, the user's preference level is high, and high-quality video data that requires a high quality of the video, based on the user's preference information, has high priority,
By not assigning a sector that has a high ECC error correction level and is likely to become a defective sector in the future, the reliability of this video data can be improved without reducing the recording area of the recording medium.

According to the video recording apparatus of the present invention, in the video recording apparatus for recording the video data and the control data necessary for controlling the reproduction of the video data on the recording medium, the data is recorded on the recording medium. In addition, the read / write means for reading data from the recording medium, the error correction means for performing ECC error correction processing on the data read by the read / write means, and the error correction level by the error correction means have a predetermined threshold. An error correction level determination means for determining for each sector whether or not the value is greater than or equal to a value, and when recording the control data, the error correction level determination means determines that the error correction level is equal to or higher than a predetermined threshold value. Control means for controlling the recording of the data so that the control data is not recorded in the sector.
Since it has, it is used for playback of video data,
By not allocating a sector having a high ECC error correction level and a high possibility of becoming a defective sector in the future to control data that requires high quality, the control data of the control data can be stored without reducing the recording area of the recording medium. The reliability can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a video recording device according to a first embodiment of the present invention.

FIG. 2 is a diagram for explaining the operation of the video recording device according to the first embodiment of the present invention.

FIG. 3 is a diagram for explaining the operation of the video recording device according to the first embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a video recording device according to a second embodiment of the present invention.

FIG. 5 is a diagram for explaining the operation of the video recording device according to the second embodiment of the present invention.

FIG. 6 is a diagram for explaining the operation of the video recording device according to the second embodiment of the present invention.

FIG. 7 is a diagram for explaining the operation of the video recording device according to the second embodiment of the present invention.

FIG. 8 is a block diagram showing a configuration of a video recording device according to a third embodiment of the present invention.

FIG. 9 is a diagram for explaining the operation of the video recording device according to the third embodiment of the present invention.

FIG. 10 is a diagram for explaining the operation of the video recording device according to the third embodiment of the present invention.

FIG. 11 is a diagram for explaining the operation of the video recording device according to the third embodiment of the present invention.

FIG. 12 is a block diagram showing a configuration of a video recording device according to a fourth embodiment of the present invention.

FIG. 13 is a diagram for explaining the operation of the video recording device according to the fourth embodiment of the present invention.

FIG. 14 is a diagram for explaining the operation of the video recording device according to the fourth embodiment of the present invention.

FIG. 15 is a diagram for explaining the operation of the video recording device according to the fourth embodiment of the present invention.

FIG. 16 is a diagram for explaining the operation of the conventional video recording device.

[Explanation of symbols]

1, 11 hard disk 2 reading and writing section 3 ECC error correction section 4 Error correction level judgment section 5 Error sector storage 6, 12, 22, 31 Control unit 7 data buffer 21 User preference information storage unit

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G11B 20/18 572 G11B 20/18 572B 572F H04N 5/92 H04N 5/92 H (72) Inventor Kouda Shinya 1 at 8 Koshinmachi, Takamatsu City, Kagawa Prefecture Matsushita Judenko Kogyo Co., Ltd. (72) Inventor Hitoshi Kawamui 1 at 8 Koshincho, Takamatsu City, Kagawa Matsushita Judenko Kogyo Co., Ltd. F-term (reference) 5C053 FA23 GB01 GB14 GB15 5D044 AB05 AB07 BC01 CC05 DE02 DE12 DE62 DE68 DE96 EF05 GK10

Claims (12)

[Claims] 1. A video recording for recording video data on a recording medium having a video storage area for storing video data for storage and a temporary buffer area for temporarily storing video data. In the apparatus, a read / write unit that records video data on the recording medium and reads the video data from the recording medium, and an error correction unit that performs an ECC error correction process on the video data read by the read / write unit, Error correction level determining means for determining for each sector whether the error correction level by the error correcting means is greater than or equal to a predetermined threshold value; and the error correction level determining means for determining the error correction level is greater than or equal to a predetermined threshold value. The recording of the video data is controlled so that the sector determined to be used as the temporary buffer area is used. Video recording apparatus characterized by comprising: a control means. 2. The video recording apparatus according to claim 1, wherein the control unit sets a predetermined error correction level of a predetermined sector in the video storage area after the storage video data is recorded in the video storage area. A video recording device, characterized in that when the threshold value is equal to or higher than a threshold value, the sector and the sector in the temporary buffer area whose error correction level is lower than a predetermined threshold value are exchanged. 3. The video recording apparatus according to claim 1, wherein the control unit has a predetermined block unit including sectors around a sector whose error correction level is determined to be equal to or higher than a predetermined threshold value. A video recording device characterized by being controlled so as to be used as a temporary buffer area. 4. A video recording apparatus for recording video data on a recording medium, wherein the video data is recorded on the recording medium and the read / write means reads the video data from the recording medium, and the video read by the read / write means. Error correction means for performing ECC error correction processing on data, error correction level determination means for determining whether or not the error correction level by the error correction means is equal to or higher than a predetermined threshold, and bit rate When recording video data having a high bit rate, the video data having a high bit rate is recorded so as not to be recorded in a sector whose error correction level is determined to be equal to or higher than a predetermined threshold value by the error correction level determining means. A video recording apparatus comprising: a control unit for controlling recording. 5. The video recording apparatus according to claim 4, wherein the control means, after video data having a high bit rate is recorded on the recording medium, causes an error of a predetermined sector in an area where the video data is recorded. When the correction level is equal to or higher than a predetermined threshold value, the sector or an area including the sector is controlled to be moved to an unused area whose error correction level is lower than the predetermined threshold value. Video recording device. 6. The video recording apparatus according to claim 4, wherein the control means, after video data having a high bit rate is recorded on the recording medium, causes an error of a predetermined sector in an area where the video data is recorded. When the correction level is equal to or higher than a predetermined threshold value, an area including the sector or the sector and video data having a lower bit rate than the video data having a high bit rate are recorded.
An image recording apparatus, which is controlled so as to replace an area having an error correction level lower than a predetermined threshold value. 7. A video recording apparatus for recording video data on a recording medium, wherein the video data is recorded on the recording medium and the read / write means reads the video data from the recording medium, and the video read by the read / write means. Error correction means for performing ECC error correction processing on the data; error correction level determination means for determining whether or not the error correction level by the error correction means is equal to or higher than a predetermined threshold value; When recording video data with a high priority based on the preference information, the video data with a high priority is recorded in a sector whose error correction level is determined to be equal to or higher than a predetermined threshold value by the error correction level determination means. A video recording apparatus comprising: a control unit for controlling recording of video data so as not to record the video data. 8. The video recording apparatus according to claim 7, wherein the control means, after the video data having the higher priority is recorded on the recording medium, sets a predetermined sector in an area where the video data is recorded. When the error correction level becomes equal to or higher than a predetermined threshold value, the sector or the area including the sector is controlled to be moved to an unused area whose error correction level is lower than the predetermined threshold value. Video recorder. 9. The video recording apparatus according to claim 7, wherein the control means, after the video data having the higher priority is recorded on the recording medium, sets a predetermined sector in an area where the video data is recorded. When the error correction level is equal to or higher than a predetermined threshold value, the sector or an area including the sector and video data having a lower priority than the video data having a higher priority are recorded, and the error correction level is An image recording apparatus, which is controlled so as to replace an area lower than a predetermined threshold value. 10. A video recording apparatus for recording video data on a recording medium and control data required for controlling reproduction of the video data, wherein the data is recorded on the recording medium and the data is read from the recording medium. The read / write means and E for the data read by the read / write means
Error correction means for performing CC error correction processing, error correction level determination means for determining for each sector whether or not the error correction level by the error correction means is greater than or equal to a predetermined threshold, and the control data is recorded. In some cases, the control means controls the recording of data so that the control data is not recorded in a sector whose error correction level is determined to be equal to or higher than a predetermined threshold value by the error correction level determination means. Video recording device characterized by. 11. The video recording apparatus according to claim 10, wherein the control unit sets an error correction level of a predetermined sector in an area in which the control data is recorded after the control data is recorded in the recording medium. Video recording characterized by controlling to move the sector or an area including the sector to an unused area whose error correction level is lower than a predetermined threshold when the threshold value is exceeded apparatus. 12. The video recording apparatus according to claim 10, wherein the control unit sets an error correction level of a predetermined sector in an area in which the control data is recorded after the control data is recorded in the recording medium. When the threshold value is exceeded, the sector or the area containing the sector and the area where the video data is recorded and the error correction level is lower than the threshold value are controlled to be exchanged. Video recording device characterized by.