JP2000307987A - Video/audio recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hold or write the managing information of a video/audio with much less power quantity and time when the supply of power is stopped or remaining power quantity is little under recording the video or audio. SOLUTION: When the supply of power is stopped or remaining power quantity is little under recording the video or audio, minimum managing information required for recovery is selected, compressed as needed and held in a backup memory 20 or collectively recorded at one spot on an optical disk 31 and at the time of power supply recovery, the managing information is generated again and recorded again at a regular position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video / audio recording / reproducing apparatus for recording / reproducing an AV signal on a recording medium.
The present invention relates to a video / audio recording / reproducing apparatus for recording management information of a V signal on a recording medium.

[0002]

2. Description of the Related Art In the present invention, an AV signal means a video signal, an audio signal, or both a video signal and an audio signal. For example, it is an MPEG stream obtained by compressing a video signal or an audio signal by MPEG.

[0003] The recording medium information is information indicating whether or not recording of the optical disk has been completed normally when an AV signal is recorded on a recording medium such as an optical disk, a disk ID or a disk name of the optical disk, an AV signal on the optical disk. Recording device ID or recording device name of the recording device that recorded
Finally, it means the date and time when the AV signal was recorded on the optical disc.

In a recording / reproducing apparatus for recording and reproducing AV signals on an optical disk such as a DVD, first, A
The V signal is recorded in real time, and after the recording of the AV signal is completed, the management information of the AV signal is recorded. At the time of reproduction, first, the management information of the AV signal is read, the recording position of the AV signal is specified, and the recording position is accessed and reproduced.

In such a recording / reproducing apparatus, consider a case where power supply is stopped while an AV signal is being recorded on an optical disk.

[0006] The situation in which the power supply is stopped may be a situation in which recording is performed using AC power as a power source, a case where a power plug is disconnected from an outlet during recording, or a case where power is interrupted during recording. When recording is performed using a battery as a power source, the battery may be removed during recording.

If power is not supplied to the apparatus while an AV signal is being recorded on an optical disk, the recording is stopped at that point, and management information corresponding to the last recorded AV signal cannot be recorded. . When playing back the optical disk recorded in this way, even if an attempt is made to play back the last recorded AV signal, no management information corresponding to that AV signal is recorded, and there is no way to access the AV signal. Could not be played.

Therefore, for example, Japanese Patent Application Laid-Open No. Hei 6-31445 discloses
As described in No. 1, when the power is not supplied to the device, the management information is temporarily recorded in a semiconductor memory or the like, and the AV signal cannot be reproduced because the management information is lost. I was avoiding the situation.

[0009] However, when the data amount of the management information is large, a large capacity semiconductor memory is required to record all the management information, so that the cost of parts increases, and it is disadvantageous to reduce the size by increasing the number of parts. There was a problem. Further, in order to store a large amount of information in a semiconductor memory such as a DRAM, a large amount of power is consumed, and there is a problem that the power consumption is increased.

Also, when the recording of the AV signal is continued until the remaining power of the battery for supplying power to the entire apparatus becomes 0, the management information cannot be written similarly to the case of the power failure.

Therefore, when the remaining power of the battery falls below a certain value, the recording is automatically stopped and the management information is written, thereby avoiding a situation in which the management information of the recorded AV signal is lost and cannot be reproduced. Was.

However, when it is necessary to perform a plurality of seeks when recording management information on a disk, the amount of power consumed by the seek becomes large, so that a large amount of power is required. There was a problem that the time that could be shortened.

As another countermeasure, for example, as described in Japanese Patent Application Laid-Open No. 7-121313, a method of updating management information at predetermined time intervals is conceivable.

However, when the data amount of the management information is small, the management information can be updated in parallel with the recording. However, when the data amount of the management information is large, the processing amount required for the recording is large, If the processing capability of the recording apparatus is not so high, there is a problem that the management information cannot be updated in parallel with the recording because real-time recording processing cannot be performed in time. Especially for AV applications
In VD-RAM recording, as the recording time increases, the amount of management information increases, and this problem becomes significant. Also, to record continuously in multiple areas on the disc,
When the number of recording areas increases, the amount of data to be updated increases even if only addresses are selected and updated. In addition, when the area for recording the management information and the area for recording the AV signal are separated from each other or when the seek speed of the drive itself is slow, the seek time between the areas is long. Will be noticeable.

Further, for example, as described in Japanese Patent Application Laid-Open No. H8-7534, a method of backing up an elapsed time from the start of recording and a flag indicating that the power supply has been shut down can be considered.

However, if the transfer rate is different even for the same elapsed time, the data size is different, and the data size cannot be uniquely determined only from the elapsed time. Therefore, the length of the recorded area (or the end of the recorded area) position)
There was a problem that can not be identified. For example, in recording on a DVD-RAM for AV use, MP
By changing the compression rate of EG compression, recording can be performed at various transfer rates, large and small. When recording at a variable transfer rate, the transfer rate differs even within the same stream. Since recording may be continuously performed in the area, it is difficult to specify the recording area only from the recording time.

[0017]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to solve the problem when the main power supply cannot supply power during recording of an AV signal. Using a backup power supply as a power supply, selecting a data size or an entry from the management information of the AV signal,
It is an object of the present invention to provide a video / audio recording / reproducing apparatus which retains necessary minimum management information with a small amount of power by temporarily writing and holding data in a data storage means.

Still another object of the present invention is to supply power from a standby power supply when the main power supply cannot supply power during recording of an AV signal by the video / audio recording / reproducing means, and automatically output the AV signal. Of the AV signal recorded last, and the video / audio recording / reproducing means records the entry in the management information of the last recorded AV signal in the area closest to the recording stop position on the recording medium following the AV signal. The management information can be recorded without using a data storage means such as a memory, and the management information recording on the disc in an emergency can be completed in a short time as described above. It is an object of the present invention to provide a video / audio recording / reproducing apparatus capable of reducing the amount of power required.

Still another object of the present invention is to record the minimum necessary management information of the management information of the AV signal while recording the AV signal by the video / audio recording / reproducing means. When the power control unit detects that the power consumption has decreased to the required amount, the data size or entry is selected from the management information of the AV signal, and the data is temporarily written and held in the data storage unit. It is an object of the present invention to provide a video / audio recording / reproducing apparatus which retains a necessary minimum amount of management information.

Still another object of the present invention is to record the minimum necessary management information among the management information of the AV signal while recording the AV signal by the video / audio recording / reproducing means. The recording of the AV signal is automatically stopped when the power control means detects that the power has been reduced to the required amount, and the entry of the management information of the last recorded AV signal is recorded following the AV signal. By recording the video / audio recording / reproducing means in the area closest to the recording stop position on the medium, the management information can be recorded without using a data storage means such as a semiconductor memory. It is an object of the present invention to provide a video / audio recording / reproducing apparatus which can complete the recording of the management information on the disc in a short time, and thus can reduce the amount of power consumed by the recording of the management information.

Still another object of the present invention is to select a data size or an entry from the management information of an AV signal when a main power supply cannot supply power during recording of an AV signal by using a spare power supply as a power supply. Then, the selected management information is signal-compressed and temporarily written and held in the data storage means, so that the required capacity of the data storage means can be reduced. To provide a video / audio recording / reproducing apparatus that holds the information.

Still another object of the present invention is to supply power from a standby power supply when the main power supply becomes unable to supply power during recording of an AV signal by the video / audio recording / reproducing means, and automatically output the AV signal. Is stopped, the entry is selected from among the management information of the last recorded AV signal, the selected management information is signal-compressed, and the AV signal is followed by an entry in the area closest to the recording stop position on the recording medium. By recording by the video / audio recording / reproducing means, the management information can be recorded without using a data storage means such as a semiconductor memory, and the management information can be recorded on the disc in an emergency in a short time as described above. It is an object of the present invention to provide a video / audio recording / reproducing apparatus which can be completed and thus can reduce the amount of power consumed for recording the management information.

Still another object of the present invention is to make it possible to record the minimum necessary management information of the management information of the AV signal while recording the AV signal by the video / audio recording / reproducing means. When the power control unit detects that the required power has been reduced, the data size or the entry is selected from the management information of the AV signal, the selected management information is signal-compressed, and the data is temporarily stored. An object of the present invention is to provide a video / audio recording / reproducing apparatus which can reduce the required capacity of the data storage means by writing and holding the data in the storage means, and hold the minimum necessary management information with a smaller amount of power.

Still another object of the present invention is to record the minimum necessary management information of the management information of the AV signal while recording the AV signal by the video / audio recording / reproducing means. When the power control unit detects that the required power has been reduced, the recording of the AV signal is automatically stopped, an entry is selected from the management information of the last recorded AV signal, and the selected management information is selected. After the audio signal is compressed, the video / audio recording / reproducing means records the data in the area closest to the recording stop position on the recording medium following the AV signal, so that the management information can be stored without using a data storage means such as a semiconductor memory. Recording of the management information on the disk in an emergency as described above can be completed in a shorter time, thereby reducing the amount of power consumed by the management information recording. It is to provide a video-audio recording and reproducing apparatus that can.

Still another object of the present invention is to provide a method for controlling a main power supply after recovering to a state where power can be supplied, based on the minimum necessary management information held or recorded in a data storage means or a recording medium. The video which makes the last recorded AV signal reproducible by performing signal decompression, regenerating regular management information, and recovering the video / audio recording / reproducing means to record the regular management information at a regular position. An object of the present invention is to provide an audio recording / reproducing device.

Still another object of the present invention is to provide a method for transmitting a signal, if necessary, based on the minimum necessary management information held or recorded in the data storage means or the recording medium after the battery is restored to a state where it can supply power. Decompress, regenerate regular management information, and perform recovery to record the regular management information at the regular position by the video / audio recording / reproducing means, so that the last recorded AV signal can be reproduced. It is to provide a recording and reproducing device.

Still another object of the present invention is to provide a video / audio recording / reproducing apparatus which can select whether to perform recovery immediately or not after recovering to a state where the main power supply or the battery can supply power. It is in the thing.

Still another object of the present invention is to provide a power supply control means for reducing the remaining power of a battery to the power required for recording the minimum necessary management information during recording of an AV signal. If detected, at least stop the power supply to the signal input means, and at least continue to supply power to the system control means, hold or record the management information with less power, by the power saved,
An object of the present invention is to provide a video / audio recording / reproducing device capable of recording for a longer time.

Still another object of the present invention is to enable the recording medium to be taken out from the video / audio recording / reproducing means after at least the minimum necessary management information is recovered, so that the recovery can be performed before the recovery. It is an object of the present invention to provide a video / audio recording / reproducing apparatus which does not accidentally overwrite the last recorded AV signal.

Still another object of the present invention is to temporarily store the recording medium information indicating the recording state of the recording medium in the data storage means so that the recording medium can be taken out and additional recording or overwriting recording can be performed by another recording apparatus. An object of the present invention is to provide a video / audio recording / reproducing apparatus which can easily detect what has been performed.

Still another object of the present invention is to perform recovery when the held recording medium information matches the recording state of the recording medium, thereby taking out the recording medium before recovery and setting the recording medium again. Even in such a case, it is an object to provide a video / audio recording / reproducing apparatus capable of easily determining whether or not the recording medium can be recovered and performing the recovery.

[0032]

According to a first aspect of the present invention, there is provided a video / audio recording / reproducing apparatus including a video / audio recording / reproducing means, a data storage means, a main power supply, a standby power supply, and a system control means. When the main power supply becomes unable to supply power during the recording of the data, the system uses the standby power supply as a power supply, selects the data size from the management information of the AV signal, and temporarily writes and holds the data size in the data storage means. The control means controls the operation.

A video / audio recording / reproducing apparatus according to a second aspect of the present invention comprises:
A video / audio recording / reproducing means, a data storage means, a main power supply, a standby power supply, and a system control means; and when the main power supply cannot supply power while recording the AV signal by the video / audio recording / reproducing means. , Power from the standby power supply, A
The system control means controls such that an entry is selected from the management information of the V signal and is temporarily written to the data storage means.

A video / audio recording / reproducing apparatus according to a third aspect of the present invention comprises:
A video / audio recording / reproducing unit, a main power supply, a standby power supply, and a system control unit are provided. When the main power supply becomes unable to supply power during recording of an AV signal by the video / audio recording / reproducing unit, the power is supplied from the standby power supply. And automatically stops the recording of the AV signal, and the entry of the management information of the last recorded AV signal is stored in the area closest to the recording stop position on the recording medium following the AV signal. The system control means controls so that the reproduction means records.

A video and audio recording / reproducing apparatus according to a fourth aspect of the present invention comprises:
A video / audio recording / reproducing unit, a data storage unit, a battery, a power control unit, and a system control unit. When the power control means detects that the amount of power required to record the minimum necessary management information of the information has been reduced, the data size is selected from the management information of the AV signal and temporarily. The system control means controls the data to be written in the data storage means.

A video / audio recording / reproducing apparatus according to a fifth aspect of the present invention comprises:
Video / audio recording / reproducing means, data storage means, battery, power control means, standby power supply, system control means, while the video / audio recording / reproducing means is recording an AV signal, the remaining power of the battery is: When the power control unit detects that the amount of power required to record the minimum necessary management information including at least the data size in the management information of the AV signal has been reduced, the data in the management information of the AV signal The size is selected, the system control unit controls the data to be temporarily written to the data storage unit, and backed up by the backup power supply.

A video / audio recording / reproducing apparatus according to a sixth aspect of the present invention comprises:
A video / audio recording / reproducing unit, a data storage unit, a battery, a power control unit, and a system control unit. When the power control means detects that the power amount required for recording the minimum necessary management information among the information is reduced, the entry is selected from the management information of the AV signal and the data is temporarily stored. The system control means controls to write the data in the storage means.

A video / audio recording / reproducing apparatus according to a seventh aspect of the present invention comprises:
Video / audio recording / reproducing means, data storage means, battery, power control means, standby power supply, system control means, while the video / audio recording / reproducing means is recording an AV signal, the remaining power of the battery is: When the power control means detects that the amount of power required to record the minimum necessary management information among the management information of the AV signal has been reduced, an entry is selected from among the management information of the AV signal, The system control means controls the data to be temporarily written in the data storage means and backed up by a backup power supply.

The video / audio recording / reproducing apparatus according to the eighth aspect of the present invention comprises:
A video / audio recording / reproducing unit, a battery, a power control unit, and a system control unit, wherein during recording of the AV signal by the video / audio recording / reproducing unit, the remaining amount of power of the battery is a necessary minimum of the management information of the AV signal. When the power control means detects that the power amount required for recording the limited management information has been reduced, the recording of the AV signal is automatically stopped, and among the management information of the last recorded AV signal, The entry is A
Following the V signal, the video / audio recording / reproducing means records in the area closest to the recording stop position on the recording medium,
This is controlled by a system control means.

A ninth video / audio recording / reproducing apparatus according to the present invention comprises:
In the video / audio recording / reproducing apparatus according to the first aspect of the present invention, a signal compression unit is provided, and the signal compression unit compresses the data size into a signal, and then temporarily writes the data size in the data storage unit.
This is controlled by a system control means.

According to a tenth aspect of the present invention, there is provided the video / audio recording / reproducing apparatus according to the fourth or fifth aspect of the present invention, further comprising signal compression means, and the signal compression means compressing the data size into a signal. , The system control means controls to temporarily write the data into the data storage means.

According to an eleventh aspect of the present invention, there is provided the video / audio recording / reproducing apparatus according to the second aspect of the present invention, further comprising a signal compressing means, which temporarily compresses the entry after the signal compressing means compresses the signal of the entry. Like writing to data storage means,
This is controlled by a system control means.

A twelfth aspect of the present invention provides the video / audio recording / reproducing apparatus according to the third aspect of the present invention, further comprising a signal compressing means, and temporarily compressing the entry after the signal compressing means compresses the signal. The system control means controls to write data on a recording medium.

A thirteenth aspect of the present invention provides the video / audio recording / reproducing apparatus according to the sixth or seventh aspect of the present invention, further comprising a signal compressing means, and the signal compressing means compressing the signal of the entry. The system control means controls to temporarily write the data into the data storage means.

According to a fourteenth aspect of the present invention, there is provided the video / audio recording / reproducing apparatus according to the eighth aspect of the present invention, further comprising a signal compressing means, and temporarily compressing the entry after the signal compressing means compresses the signal. The system control means controls to write data on a recording medium.

The fifteenth aspect of the present invention provides the video / audio recording / reproducing apparatus according to the first or second aspect of the present invention, wherein the video / audio recording / reproducing apparatus retains the data in the data storage means after the main power supply is restored to a state capable of supplying power. Based on the minimum necessary management information, the regular management information is regenerated, and the video / audio recording / reproducing means performs recovery for recording the regular management information at a regular position.

The video / audio recording / reproducing apparatus according to the sixteenth aspect of the present invention is the video / audio recording / reproducing apparatus according to the third aspect of the present invention, wherein the minimum power recorded on the recording medium is restored after the main power supply is restored to a state where power can be supplied. Based on the limited management information, the regular management information is regenerated, and the video and audio recording / reproducing means performs recovery for recording the regular management information at a regular position.

According to a seventeenth aspect of the present invention, the video / audio recording / reproducing apparatus according to the fourth, fifth, sixth, or seventh aspect of the present invention comprises: Based on the minimum necessary management information stored in the data storage unit, the regular management information is regenerated, and the video / audio recording / reproducing unit performs recovery to record the regular management information at the proper position. It is.

An eighteenth aspect of the present invention provides the video / audio recording / reproducing apparatus according to the eighth aspect of the present invention, wherein the video / audio recording / reproducing apparatus according to the eighth aspect of the present invention recovers the battery to a state in which power can be supplied, and In this case, the regular management information is regenerated based on the management information, and the video / audio recording / reproducing means performs recovery for recording the regular management information at a regular position.

A video and audio recording and reproducing apparatus according to a nineteenth aspect of the present invention is the video and audio recording and reproducing apparatus according to the ninth aspect of the present invention, wherein the video and audio recording and reproducing apparatus is provided with signal decompression means, and stores data after the main power supply is restored to a state where power can be supplied. The minimum necessary management information stored in the means is expanded by the signal expansion means, and the normal management information is regenerated based on the expanded signal. This is to perform recovery for recording.

According to a twentieth aspect of the present invention, there is provided the video / audio recording / reproducing apparatus according to the tenth aspect, wherein:
After the signal is restored to a state where the battery can supply power, the normal management information is regenerated based on the minimum necessary management information held in the data storage means. The recovery for recording the regular management information at the regular position is performed.

The video / audio recording / reproducing apparatus according to the twenty-first aspect is the video / audio recording / reproducing apparatus according to the eleventh aspect,
After the main power supply has been restored to a state in which power can be supplied from the main power supply, the minimum necessary management information held in the data storage means is expanded by the signal expansion means, and based on the expanded management information, Is reproduced, and the video / audio recording / reproducing means performs recovery for recording the regular management information at a regular position.

The video / audio recording / reproducing apparatus according to the twelfth aspect of the present invention is the video / audio recording / reproducing apparatus according to the twelfth aspect, wherein
After the main power supply is restored to a state where power can be supplied from the main power supply, the minimum necessary management information recorded on the recording medium is expanded by the signal expansion means, and a normal The management information is regenerated, and the video / audio recording / reproducing means performs recovery for recording the regular management information at a regular position.

The video and audio recording and reproducing apparatus according to the twenty-third aspect of the present invention is the video and audio recording and reproducing apparatus according to the thirteenth aspect,
After the battery is restored to a state in which power can be supplied, the minimum necessary management information held in the data storage unit is expanded by the signal expansion unit, and regular management is performed based on the expanded signal. The information is regenerated, and the video / audio recording / reproducing means performs recovery for recording the regular management information at a regular position.

According to a twenty-fourth aspect of the present invention, there is provided the video / audio recording / reproducing apparatus according to the fourteenth aspect, wherein:
After the battery is restored to a state in which the battery can supply power, the minimum necessary management information recorded on the recording medium is expanded by the signal expansion means, and regular management information is generated based on the expanded signal. Is reproduced, and the video / audio recording / reproducing means performs recovery for recording the regular management information at a regular position.

According to a twenty-fifth aspect of the present invention, there is provided the fifteenth, sixteenth, nineteenth, twenty-first, or twenty-second aspect of the present invention, wherein the main power supply is capable of supplying power. After the power control unit detects that the power supply has been recovered, it is possible to select whether to perform recovery or not.

According to a twenty-sixth aspect of the present invention, in the seventeenth, eighteenth, twentieth, twenty-third, or twenty-fourth aspect of the present invention, at least regular management information is recorded. After the power control unit detects that the remaining power of the battery has recovered to a level higher than that required for the power supply, it is possible to select whether to perform recovery or not to perform recovery.

A twenty-seventh aspect of the present invention is the video / audio recording / reproducing apparatus according to the fourth, fifth, sixth, seventh, eighth, tenth, thirteenth, or fourteenth aspects of the present invention. Power supply destination selection means,
During recording of the AV signal by the video / audio recording / reproducing means, the power control means has detected that the remaining power of the battery has decreased to the power required for recording the minimum necessary management information of the AV signal. In this case, the power supply destination selection means switches the power supply destination so that the power supply to the signal input means is stopped and at least the power supply to the video / audio recording / reproduction means is continued.

A twenty-eighth video / audio recording / reproducing apparatus according to the present invention provides a fifteenth, sixteenth, seventeenth, eighteenth, nineteenth, twentieth, twenty-second, twenty-third, or twenty-fourth video of the present invention. The audio recording / reproducing apparatus includes a recording medium removal control unit for controlling the removal of the recording medium, so that the recording medium can be removed from the video / audio recording / reproducing unit after at least the minimum necessary management information is recovered. As described above, the recording medium removal control means is controlled by the system control means.

The video / audio recording / reproducing apparatus according to the twenty-ninth aspect of the present invention is the video / audio recording / reproducing apparatus according to the first, second, fourth, fifth, sixth or seventh aspects of the present invention. The recording medium information such as the last recording date and time is temporarily written in the data storage means.

According to a thirtieth aspect of the present invention, there is provided the video / audio recording / reproducing apparatus according to the third or eighth aspect of the present invention, further comprising a data storage means for recording the ID information of the recording medium and the last recording date and time. The medium information is temporarily written in the data storage means.

According to a thirty-first aspect of the present invention, in the video / audio recording / reproducing apparatus according to the twenty-ninth or thirtieth aspect, the first recording medium information written in the data storage means and the video / audio recording / reproducing apparatus are provided. If the second recording medium information of the recording medium to be recorded / reproduced by the means matches, recovery is performed.

[0063]

Embodiments of the present invention will be described below in detail with reference to the drawings.

First, a first embodiment of the present invention will be described with reference to FIGS. 1, 2 and 3.

The basic configuration of the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing a basic configuration of a video / audio recording / reproducing apparatus according to a first embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes an input / output unit.
1 is a tuner, 12 is an interface unit,
13 is a switching means, 2 is a semiconductor memory, 2
Reference numeral 0 denotes a backup memory, 3 denotes an optical disk recording / reproducing unit, 31 denotes an optical disk, 32 denotes a pickup unit, 4 denotes signal processing means, and 41 denotes signal compression / decompression means (hereinafter, referred to as CODEC). Reference numeral 42 denotes a microprocessing unit (hereinafter, referred to as MPU); 5, a power supply; 6, a system control means; 7, a standby power supply;

The input / output means 1 outputs an AV signal input from outside the apparatus to the signal processing means 4 at the time of recording, and outputs an AV signal input from the signal processing means 4 to the outside of the apparatus at the time of reproduction. The tuner 11 demodulates a modulation signal input from outside the device and outputs the demodulated signal to the switching means 13. The interface unit 12 outputs the input AV signal to the switching unit 13 and outputs the AV signal input from the switching unit 13 to the outside of the device. The switching unit 13 switches the AV signal input from the tuner 11 or the interface unit 12 and outputs the AV signal to the signal processing unit 4, and outputs the AV signal input from the signal processing unit 4 to the interface unit 12. The semiconductor memory 2 stores AV signals input and output from the signal processing unit 4 and management information. Backup memory 20
Is a memory for storing management information.

The optical disk recording / reproducing section 3 records the AV signal and the management information input from the signal processing means 4 on a recording medium, and outputs the AV signal read from the recording medium to the signal processing means 4. The optical disc 31 is a recordable recording medium and can be attached to and detached from the present apparatus. The pickup unit 32 writes an AV signal on the optical disk 31 and reads the AV signal from the optical disk 31. The signal processing means 4 includes the input / output means 1
Alternatively, it processes the AV signal and management information input from the optical disk recording / reproducing unit 3 or the semiconductor memory 2 and outputs the processed signal to the optical disk recording / reproducing unit 3 or the semiconductor memory 2 or the input / output unit 1. The CODEC 41 is a semiconductor memory 2
Input / output an AV signal to / from the
The AV signal input from U42 is compressed or decompressed and output. The MPU 42 inputs and outputs an AV signal to and from the semiconductor memory 2,
An arithmetic operation is added to the AV signal input from C41, and the result is output. The power supply 5 supplies power to the entire apparatus. Backup power supply 7
Supplies power to necessary parts when the power supply 5 suddenly stops supplying power. The power control unit 8 monitors the amount of power supplied by the power supply 5, and transmits power supply stop information to the system control unit 6 when the power supply 5 stops supplying power. The system control means 6 includes the input / output means 1, the semiconductor memory 2, the backup memory 20, the optical disk recording / reproducing section 3, the signal processing means 4, and the power supply 5.
And controls the standby power supply 7 and the power supply control unit 8.

When recording an AV signal using this apparatus,
The system control means 6 normally controls the device as follows. First, prior to recording, information indicating that recording is started and a change is made to the disc (hereinafter, referred to as file open information) is written to the optical disc 31. The modulated signal input to the input / output unit 1 is converted into an AV signal by the tuner 11 and output to the switching unit 13. The AV signal input to the input / output unit 1 is transmitted to the interface unit 12.
And is output to the switching means 13 via. Switching means 13
Transfers the AV signal to the signal processing means 4. Input / output means 1
The AV signal transferred to the signal processing means 4 from the
The signal is compressed by the C41, further processed by the MPU 42, and transferred to the optical disk recording / reproducing unit 3. When the CODEC 41 performs a signal compression process, the semiconductor memory 2 is used as a work buffer. MPU42
Performs signal processing, management information of the AV signal to be processed is generated and stored in the backup memory 20.

The management information includes an entry of an AV signal, an address of a recording area on an optical disk, and the like. The entry is a position and a number of a recording unit (hereinafter, referred to as a VOBU) of an AV signal for each fixed recording time of the AV signal, an I-picture size for each VOBU, the number of fields,
This is management information such as the size of the VOBU. An I picture is an image compressed in a frame in MPEG compression.

The AV signal transferred from the signal processing unit 4 to the optical disk recording / reproducing unit 3 is written on the optical disk 31 by the pickup unit 32.

After the recording of the AV signal is completed, management information of the recorded AV signal is recorded. The management information is held in the backup memory 20, and the management information is transferred from the backup memory 20 to the optical disk recording / reproducing unit 3 via the signal processing unit 4 and recorded on the optical disk 31.

At this time, the recording position differs depending on the type of the management information, and the management information must be recorded in a plurality of areas on the optical disk 31 in a distributed manner. Therefore, the pickup unit 32 needs to repeat seek and recording a plurality of times. When the recording of the management information is completed, the file open information recorded at the first stage of the recording is updated to the information of the completed recording (hereinafter, referred to as file close information). Thus, the recording of the AV signal ends.

When video and audio are reproduced using this apparatus, the flow of the AV signal is reversed from that at the time of recording, as described below. In the optical disk recording / reproducing unit 3, the pickup unit 32 reads the management information of the AV signal from the optical disk 31, reads the AV signal based on the management information, and transfers it to the signal processing unit 4. The signal processing means 4 performs signal separation, decompression processing, etc. on the input AV signal, transfers the signal to the input / output means 1 or an output means (not shown), and reproduces video and audio.

As described above, the AV signal is reproduced.

During the operation of recording and reproducing the AV signal, the system control means 6 controls the apparatus so that the power supply 5 supplies necessary power to the entire apparatus. Further, the power supply control unit 8 monitors the power supplied by the power supply 5 and transmits power supply stop information to the system control unit 6 as necessary.

FIGS. 2 and 3 are flowcharts showing the operation of the video / audio recording / reproducing apparatus according to the first embodiment of the present invention.

Referring to FIGS. 1 and 2, a description will be given of the operation of retaining the management information when the power supply suddenly stops supplying power during recording in the first embodiment of the present invention.

When the power supply 5 stops the power supply during recording (step S201), the power supply control unit 8 detects the stop of the power supply (step S202), and the system control unit 6 switches the power supply 5 to the standby power supply 7. (Step S20
3). The backup power source 7 is used as a power source to select management information to be held from the management information stored in the semiconductor memory 2 (step S204). Decrease the amount. The selected management information is held in the backup memory 20 (step S205), and the backup memory 20 is backed up by the backup power source 7 (step S206), and the process ends.

The management information to be held is the recorded AV
This is management information that is indispensable for reproducing a signal and difficult to recover once lost. For example, the information includes ID information such as a disk name or number for specifying the optical disk, address information of an area where an AV signal is recorded, an entry, and the like, which are recorded at a predetermined position on the optical disk 31. Further, the holding state is a state in which the power supply from the power supply 5 is stopped and the data stored in the backup memory 20 is held by the backup power supply 7.

Next, the operation of recovering the held management information in the first embodiment of the present invention will be described with reference to FIGS.

The recovery means that the management information not recorded at the regular position on the optical disk is recorded again at the regular position. In particular, when the power supply is stopped during the recording, the information other than the optical disk is recorded. This includes re-recording the management information held in the storage means (such as a semiconductor memory) at a proper position on the optical disk.

The normal position refers to a position referred to during reproduction.

When the power supply control unit 8 detects that the power supply 5 has resumed the power supply (step S301), it compares the power supply before and after the power supply is stopped to determine whether the optical disks 31 are the same. Is confirmed (step S30).
2). The confirmation method can be realized by comparing the ID information recorded at a predetermined position on the optical disc 31 with the ID information stored in the backup memory 20. If the ID information does not match, a warning is displayed to replace the optical disk (step S303). Also, when an optical disk is not mounted on the disk recording / reproducing unit 3, a warning is displayed to mount the optical disk. If the ID information matches, recovery is performed. First, the backup memory 20
Generates formal management information based on the management information held in
The management information is written to a regular position on the optical disk 31 (step S304). Then, the file open information is updated to the file close information (step S30).
5) The apparatus enters a standby state (step S306), and ends.

The regular management information is management information in the same format as the management information written at the end of normal recording.
In addition, the standby state is a state in which recording is temporarily stopped and the start of recording is awaited.

The data size is necessary to recover the position and length of the recording area of the AV signal.
(The data size is the file size when the AV signal is recorded as a file.) The reason will be described below. When recording an AV signal on an optical disk, an area for recording the AV signal is selected according to a certain algorithm before recording. If this algorithm is the same, when recording an AV signal under certain conditions, it is possible to uniquely determine in which area to record. As an example of the algorithm, there is a table in which the positions and lengths of free areas are arranged in position order, and when recording, select the necessary free areas based on the table and record them in the selected free area. When the recording is completed, a method of updating the table can be considered. In normal recording, management information is recorded on a disc at the end of recording of an AV signal, and a table of free areas on the disc is updated. This is repeated for each successive recording operation.

The continuous recording operation is, for example, in a video camera, from the start of shooting by pressing a shooting start button, to the stop of shooting by pressing a shooting pause button. It is from the start to the end of recording.

However, if a power failure occurs during recording, an AV signal of a certain data size is recorded, and the recording operation ends with no management information recorded. In this case, the following information is required in order to know where and how long the AV signal recorded after the last time when the management information of the AV signal was recorded was recorded.

First, in order to know the recording start position, information on the free area at the time when the AV signal management information was recorded last is necessary. This can be known by reading the table. This is because the table is updated after the data size of the recorded AV signal is determined, and in this case, the table is not updated. Further, in order to know the recorded length, the data size is required. From the above information, the position and length of the last recorded AV signal can be known by applying the same free area selection algorithm. From the above, it can be said that the position and length of the recording area of the AV signal can be known from the data size. By using this concept, regular management information can be generated, and the above-described recovery can be realized.

By performing the above operation, the data amount of the held management information can be reduced as compared with the case where all the management information of the AV signal is held in the semiconductor memory 2. There are effects of avoiding a state in which reproduction cannot be performed, saving a memory, saving an amount of stored power, and the like.

Next, a second embodiment of the present invention will be described with reference to FIGS. 4, 5 and 6.

The basic configuration of the second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a block diagram showing a basic configuration of the video / audio recording / reproducing apparatus according to the second embodiment.
1 is replaced with signal input means 9, the power supply 5 in FIG. 1 is replaced with a battery 100, and the standby power supply 7 in FIG. 1 is deleted. The same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.

In FIG. 4, reference numeral 9 denotes signal input means.
Reference numeral 91 denotes a microphone, and 92 denotes an AD converter (hereinafter referred to as A
DC), 93 is a CCD sensor, and 94 is a CCD sensor.
Denotes a digital signal processing device (hereinafter referred to as DSP), and 100 denotes a battery.

The signal input means 9 converts video and audio input from outside the device into electric signals and outputs the electric signals to the signal processing means 4. The microphone 91 converts the sound into an electric signal and
Output to C92. The ADC 92 converts an analog electric signal input from the microphone 91 into a digital electric signal and outputs the digital electric signal. The CCD sensor 93 converts an image into an electric signal. The DSP 94 converts an analog electric signal input from the CCD sensor 93 into a digital electric signal and outputs it.
Battery 100 supplies power to the entire device. The power control unit 8 monitors the remaining power amount of the battery 100, and when the remaining power amount of the battery 100 decreases to a constant value A,
The remaining power amount information is transmitted to the system control means 6.

The constant value A is the amount of power reserved for the operation of recording the management information to be held. The remaining power information is a signal indicating the remaining power of the battery 100 and the magnitude and degree of the remaining power.

The system control means 6 controls the signal input means 9, the semiconductor memory 2, the optical disk recording / reproducing section 3, the signal processing means 4, the battery 100 and the power control section 8.

When recording video and audio using this apparatus, the system control means 6 normally controls the apparatus as follows.

This embodiment is different from the first embodiment in that the input / output means 1 in FIG.
1 is replaced with a battery 100, and the standby power supply 7 in FIG. 1 is omitted. In a normal recording / reproducing operation, signal input and power supply control are different from those in the first embodiment. Others are the same.

Hereinafter, a description will be given particularly of a portion related to the signal input means 9 and the battery 100. First, when recording is started, file open information is written on the optical disc 31. The audio signal input to the signal input means 9 is converted into an electric signal by the microphone 91,
The digital signal is converted into a digital signal by 2 and transferred to the signal processing means 4. The video signal input to the signal input means 9 is converted into an electric signal by the CCD sensor 93,
Further, the signal is converted into a digital signal by the DSP 94 and transferred to the signal processing means 4.

The subsequent operation is the same as the operation of the signal processing means 4 and subsequent steps described in the first embodiment, and a description thereof will be omitted.

The operation at the time of reproduction is the same as that of the first embodiment, and the description is omitted.

During the recording and reproduction of the AV signal, the system control means 6 controls the apparatus so that the battery 100 supplies the necessary power to the entire apparatus. Further, the power supply control unit 8 monitors the amount of power supplied by the battery 100 and transmits power supply stop information to the system control unit 6 as necessary.

FIGS. 5 and 6 are flowcharts showing the operation of the video / audio recording / reproducing apparatus according to the second embodiment of the present invention. With reference to FIGS. 4 and 5, an operation of recording management information when the remaining power of the battery becomes small during recording in the second embodiment of the present invention will be described.

When the remaining power amount of the battery 100 decreases to the constant value A (step S501), the power control unit 8 detects this and transmits the remaining power amount information to the system control means 6 (step S502). When the system control means 6 receives the remaining power amount information, the recording is automatically stopped (step S503), and management information to be held is selected and sorted out of management information stored in the semiconductor memory 2 (step S503). (Step S504), the data size of the selected management information is held in the backup memory 20 (Step S505), and the other than the data size of the selected management information is collectively recorded on the optical disk 31 (Step S50).
6) The state is maintained (step S507), and the process ends.

[0105] Collectively recording on the optical disk means writing management information, which should be written in a plurality of areas on the optical disk, in one area. At this time,
Write to an area as close as possible from the position where recording was stopped. However, when it is difficult to write all the management information in one area, the information is continuously written in the second area closest to the first area. This has the effect of reducing seeks as much as possible and saving power and time consumed by seeks.

If the total length of the area in which the management information is written is shorter than the length of the management information, the end of the area where the AV signal was last recorded by the length that is insufficient for writing the management information. Then, the AV signal is deleted, and the area which becomes writable thereby is used as the area for writing the management information. As a result, there is an effect that the management information can be written even when the recordable area of the disc is very small.

Next, the operation of the second embodiment of the present invention in the case of recovery will be described with reference to FIGS.

When the power control unit 8 detects that the remaining amount of power of the battery 100 has recovered to the fixed value B or more (step S601), it checks whether the optical disk 31 is a disk requiring recovery (step S602). ).
This confirmation can be made based on whether file open information or file close information is recorded. If the file close information has been recorded on the optical disc 31, recovery is not necessary, and a standby state is set (step S606), and the process ends. If the optical disk 31
If file open information is recorded in the file, recovery is performed. First, based on the data size held in the backup memory 20, the recording position of the minimum necessary management information collectively recorded on the optical disk 31 is calculated, and the management information is read out (step S603). To generate regular management information. Then, the regular management information is written to the regular position of the optical disk 31 (step S604), the file open information is updated to the file close information (step S605), and a standby state is set (step S606).

The constant value B is an amount of power reserved for a series of operations of checking whether a disk requires recovery and performing recovery.

By performing the above operation, it is possible to reduce the number of seeks at the time of recording the management information, and it is possible to record the management information with a smaller amount of power.

Further, as shown in FIG. 7, it is possible to configure the second embodiment using the battery with function 110. The second embodiment of the present invention will be described with reference to FIGS. 7, 8 and 9.
A modification of the embodiment will be described.

The battery with function 110 is a battery having a built-in battery control unit 1101 having a function corresponding to the power control unit 8, and the battery control unit 1101 has the same role as the power control unit 8 in the second embodiment. Fulfill. The recording of the management information and the recovery of the management information at that time are as shown in FIGS. 8 and 9, respectively.

The operation of recording management information according to a modification of the second embodiment of the present invention will be described with reference to FIG.

When the remaining power amount of the battery with function 110 decreases to a constant value A (step S801), the battery control unit 1101 detects this and transmits remaining power amount information to the system control means 6 (step S802). When the system control means 6 receives the remaining power information (step S803), the recording is automatically stopped (step S80).
4), out of the management information stored in the semiconductor memory 2, select and select the management information to be held (step S805), and hold the data size of the selected management information in the backup memory 20 (step S80).
6) The other management information is collectively recorded on the optical disk 31 (step S807), the state is held (step S808), and control is performed so as to end.

The operation of recovery of management information according to a modification of the second embodiment of the present invention will be described with reference to FIG.

When the fact that the battery 110 with function has recovered the remaining power amount to the predetermined value B or more is transmitted as recovery information (step S901), the system control means 6 receives the recovery information (step S902), and the optical disc 31 It is checked whether the disk requires recovery (step S903). This confirmation can be made based on whether file open information or file close information is recorded. If the file close information has been recorded on the optical disc 31, recovery is unnecessary and the apparatus enters a standby state (step S907) and ends.
If file open information is recorded on the optical disc 31, recovery is performed. First, based on the data size held in the backup memory 20, the optical disk 31
The minimum necessary management information recorded collectively is read (step S904), and regular management information is generated based on the management information. Then, the regular management information is written to the regular position of the optical disk 31 (step S90).
5) The file open information is updated to the file close information (step S906), a standby state is set (step S907), and the process ends.

By performing the above operation, as in the second embodiment, the number of seeks at the time of recording the management information can be reduced, and the recording of the management information can be realized with a smaller amount of power. .

Next, a third embodiment of the present invention will be described with reference to FIG. 1, FIG. 10 and FIG. Third of the present invention
The basic configuration of this embodiment is shown in FIG. 1 and is the same as that of the first embodiment. Further, the third aspect of the present invention
In this embodiment, the recording / reproducing operation in the normal case is the same as that of the first embodiment, and the description is omitted.

FIGS. 10 and 11 are flowcharts showing the operation of the video / audio recording / reproducing apparatus according to the third embodiment of the present invention. With reference to FIG. 1 and FIG. 10, an operation of retaining the management information when the power supply suddenly stops supplying power during recording in the third embodiment of the present invention will be described.

When the power supply 5 stops the power supply during recording (step S1001), the power supply control unit 8 detects the stop of the power supply (step S1002), and the system control means 6 switches the power supply 5 to the standby power supply 7. (Step S10
03). Using the backup power source 7 as a power source, management information to be held is selected from management information stored in the semiconductor memory 2 (step S1004), the selected management information is transferred to the MPU 42, and the MPU 42 compresses the signal. (Step S1005), the data amount of the management information is reduced to a size that can fit in the capacity of the backup memory 20.
The selected management information is stored in the backup memory 20 (step S1006), and the backup memory 20 is backed up by the backup power source 7 (step S1007), and the process ends.

Next, with reference to FIGS. 1 and 11, an operation of expanding and recovering the held management information in the third embodiment of the present invention will be described.

When the power supply control unit 8 detects that the power supply 5 has resumed the power supply (step S1101), a comparison is made between before the power supply was stopped and after the power supply was resumed to determine whether the optical disks 31 are the same. (Step S1)
102). The confirmation method can be realized by comparing the ID information recorded at a predetermined position on the optical disc 31 with the ID information stored in the backup memory 20. If the ID information does not match, a warning is displayed to replace the optical disk (step S1103). Also, when an optical disk is not mounted on the disk recording / reproducing unit 3, a warning is displayed to mount the optical disk. If the ID information matches, recovery is performed. First, the management information held in the backup memory 20 is decompressed to generate regular management information based on the extension (step S1104), and the management information is recorded at a regular position on the optical disc 31 (step S1104).
1105). Then, the file open information is updated to the file close information (step S1106), and a standby state is set (step S1107), and the process ends.

By performing the above operations, the first aspect of the present invention is achieved.
As compared with the embodiment of the present invention, the data amount of the management information to be held can be reduced, so that the state in which the recorded AV signal cannot be reproduced can be avoided, and the memory can be saved.
This has the effect of saving the amount of retained power.

Next, a fourth embodiment of the present invention will be described with reference to FIG. 4, FIG. 12 and FIG.

The basic structure of the fourth embodiment of the present invention is similar to that of FIG.
, Which is the same as that of the second embodiment, and a description thereof will be omitted. Further, in the fourth embodiment of the present invention, the operation of recording and reproduction in a normal case is the same as that of the second embodiment, and thus the description is omitted.

FIGS. 12 and 13 are flowcharts showing the operation of the video / audio recording / reproducing apparatus according to the fourth embodiment of the present invention. With reference to FIGS. 4 and 12, an operation of compressing the management information and recording it on the disc when the remaining power of the battery becomes small during recording in the second embodiment of the present invention will be described.

When the remaining power amount of the battery 100 decreases to a constant value A (step S1201), the power control unit 8 detects this and transmits the remaining power amount information to the system control means 6 (step S1202). System control means 6
Receives the remaining power information, the recording is automatically stopped (step S1203), and the management information to be held is selected and sorted out of the management information stored in the semiconductor memory 2 (step S1204). The data size of the selected management information is stored in the backup memory 20 (step S1205). The management information other than the data size among the selected management information is signal-compressed (step S1).
206), the compressed management information is collectively recorded on the optical disc 31 (step S1207), the state is held (step S1208), and the process ends.

At this time, the data is written in an area as close as possible from the position where the recording is stopped.
When the total length of the area in which the management information is written is shorter than the length of the management information, the AV signal is deleted by the length that is insufficient for writing the management information, as in the second embodiment. By performing the operation, the same effect as in the second embodiment can be obtained.

Next, the operation of the fourth embodiment of the present invention in the case where the management information is expanded and the recovery is performed will be described with reference to FIGS.

When the power control unit 8 detects that the remaining power of the battery 100 has recovered to the fixed value B or more (step S1301), it is checked whether the optical disk 31 is a disk requiring recovery (step S130).
2). This confirmation can be made based on whether file open information or file close information is recorded. If the file close information has been recorded on the optical disc 31, recovery is unnecessary and the apparatus enters a standby state (step S1307) and ends. If the file open information is recorded on the optical disc 31,
Perform recovery. First, the recording position of the management information is calculated based on the data size held in the backup memory 20,
The minimum necessary management information collectively recorded on the optical disc 31 is read (step S1303), the management information is transferred to the MPU 42, the management information is expanded by the MPU 42, and regular management information is generated (step S130).
4). Then, the regular management information is written to the regular position of the optical disc 31 (step S1305), the file open information is updated to the file close information (step S1306), and the apparatus enters a standby state (step S130).
7), end.

By performing the above operations, the second aspect of the present invention is achieved.
Compared to the embodiment, the number of seeks at the time of recording the management information can be reduced, and the recording of the management information can be realized with a smaller amount of power.

Next, a fifth embodiment of the present invention will be described with reference to FIGS.

Referring to FIGS. 4 and 14, the fifth embodiment of the present invention will be described.
In the embodiment, the operation in the case of recovery will be described. FIG. 14 is a flowchart showing the operation of the video / audio recording / reproducing apparatus according to the fifth embodiment of the present invention.

If the power control unit 8 detects that the remaining power of the battery 100 has recovered to a certain value B or more (step S1401), it is checked whether a disk requiring recovery has been set (step S140).
2). This confirmation can be made based on whether file open information or file close information is recorded. If the file close information has been recorded on the optical disc 31, recovery is unnecessary and the apparatus enters a standby state (step S1407) and ends. If the file open information is recorded on the optical disc 31 (step S1402), recovery is necessary, and the user selects whether to perform recovery (step S140).
1403). If the user selects not to perform recovery, a standby state is set (step S140).
7), end. If the user selects recovery, the management information that is collectively recorded on the optical disk 31 at one location is read (step S1404).
Based on the read management information, regular management information is generated. Then, the management information is written to the regular position (step S1405), the file open information is updated to the file close information (step S1406), and the process enters a standby state (step S1407) and ends.

By performing the above-described operations, it is possible to select recovery not to be performed when it is desired to postpone recovery and to prioritize recording of video and audio, and to perform recovery otherwise. In the former case, there is an effect that a longer time recording can be performed by transferring the amount of power saved by not performing recovery to recording of video and audio.
Further, by not performing the recovery, the time required for the recovery can be saved, and the recording can be started more quickly.

Next, a sixth embodiment of the present invention will be described with reference to FIGS.

Referring to FIGS. 15 and 16, in the sixth embodiment of the present invention, when the remaining power becomes small at the time of recording, unnecessary power supply is first stopped, and then the management information is recorded. The operation to be performed will be described. FIG. 15 shows the sixth embodiment of the present invention.
FIG. 5 is a block diagram showing a basic configuration of the video / audio recording / reproducing apparatus according to the third embodiment, which is a configuration in which a power supply destination selecting unit 80 is added to FIG. The same parts as those in FIG. 4 are denoted by the same reference numerals, and description thereof is omitted.

In FIG. 15, reference numeral 80 denotes a power supply destination selection unit. The power supply destination selection means 80 selects a part to supply power according to a control signal from the system control means 6.

FIG. 16 is a flowchart showing the operation of the video / audio recording / reproducing apparatus according to the sixth embodiment of the present invention. When the remaining power of the battery 100 decreases to a constant value C during recording (step S1601). , That power control unit 8
Is detected (step S1602), the microphone 91 or the CCD
The power supply destination selection unit switches the power supply destination so as to stop the power supply to a part unnecessary for recording the management information, such as the sensor 93 (step S1603). Then, the recording is automatically terminated (step S1604), management information to be held is selected from among the management information stored in the semiconductor memory 2 (step S1605), and the data size of the selected management information is backed up. The information is held in the memory 20 (step S1606), and the other selected management information is collectively recorded on the optical disk 31 (step S160).
7) The state is maintained (step S1608), and the process ends.

The constant value C is the amount of power that is reserved for the operation of recording management information in a state in which power supply to parts unnecessary for recording management information such as the microphone 91 and the CCD sensor 93 is stopped. It is.

By performing the above operation, there is an effect that the management information can be recorded with a smaller amount of power than in the second embodiment and the fifth embodiment. In addition, the recording time can be extended by using the saved power, and there is an effect that longer recording is possible.

Further, as shown in FIG. 17, it is possible to configure the sixth embodiment using a battery with function 110. FIG. 17 shows a configuration in which a power supply destination selection unit 80 is added to FIG. Also, in step S1603,
The unnecessary part for recording the management information is the microphone 9
It is not limited to 1 or the CCD sensor 93. For example, although not shown in the figure, a liquid crystal monitor or a viewfinder for displaying an input image or a recorded image may be considered.

Next, a seventh embodiment of the present invention will be described with reference to FIG. 18, FIG. 19, and FIG.

With reference to FIGS. 18 and 19, the operation of locking the ejection of the optical disc when the management information needs to be recovered in the seventh embodiment of the present invention will be described. FIG. 18 is a block diagram showing a basic configuration of a video / audio recording / reproducing apparatus according to a seventh embodiment of the present invention.
In this configuration, a disk lock means 33 described below is added. The same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.

In FIG. 18, reference numeral 33 denotes a disk lock means. The disk lock unit 33 fixes the optical disk 31 according to a control signal from the system control unit 6 so that the optical disk 31 is not ejected.

FIG. 19 is a flowchart showing the operation of storing management information in the video / audio recording / reproducing apparatus according to the seventh embodiment of the present invention. With reference to FIG. 19, in the seventh embodiment of the present invention, the operation of locking the disk and holding the management information so that the disk cannot be ejected when the power supply suddenly stops supplying power during recording will be described.

If the power supply 5 stops the power supply during recording (step S1901), the power supply control unit 8 detects the stop of the power supply (step S1902), and the disk lock means 33 sets the power supply so that the disk cannot be ejected. The disk is fixed (step S1903). Further, the system control means 6 switches the power supply 5 to the standby power supply 7 (step S1904). By using the backup power source 7 as a power source, the management information to be held is selected out of the management information stored in the semiconductor memory 2 (step S1905), whereby the data of the management information is reduced to a size that can be accommodated in the backup memory 20. Decrease the amount. The selected management information is stored in the backup memory 20 (step S1).
906), the backup memory 20 becomes the backup state by the backup power supply 7 (step S1907),
finish.

FIG. 20 is a flowchart showing the operation of releasing the disk ejection lock of the video / audio recording / reproducing apparatus according to the seventh embodiment of the present invention. The operation of recovering the disk management information in the seventh embodiment of the present invention will be described with reference to FIG.

When the power supply controller 8 detects that the power supply 5 has resumed power supply (step S2001), the management information stored in the backup memory 20 is recorded on the disk (step S2002), and the file close information is stored. The disc is recorded on the disc (step S2003), and the lock for disc ejection is released (step S2004). Then, the process enters a standby state (step S2005) and ends.

By performing the above operations, there is an effect that the disk is taken out before the recovery and the AV signal recorded last on the disk is not erroneously overwritten and recorded.

As shown in FIGS. 21 and 22,
Battery 100 and power supply control unit 8, battery 11 with function
It is also possible to configure the seventh embodiment by using 0.

At this time, as in the seventh embodiment, there is an effect that the disk is taken out before recovery and the AV signal recorded last on the disk is not erroneously overwritten and recorded. .

Incidentally, in order to prevent the optical disk 31 from being ejected, in addition to the method of fixing the optical disk 31, for example, an optical disk insertion and ejection opening of the optical disk recording / reproducing unit 3 (this is shown in the figure) Not closed) in a closed state. In this case, instead of fixing the optical disk 31, the optical disk recording / reproducing unit 3 is fixed with the optical disk insertion and ejection ports closed. Even if this method is used, the same effects as in the seventh embodiment can be obtained.

Next, an eighth embodiment of the present invention will be described with reference to FIGS. 1, 23 and 24.

Referring to FIGS. 1 and 23, the eighth embodiment of the present invention will be described.
In the embodiment, an operation of holding disk information indicating a recording state of the disk will be described. FIG. 23 is a flowchart showing an operation for holding disk information in the eighth embodiment of the present invention.

[0156] The disc information is, when an AV signal is recorded on a recording medium such as an optical disc, file open information or file close information indicating whether the recording of the optical disc has been completed normally, a disc ID for identifying the optical disc, or a disc ID. Name and finally A on the optical disc
The recording device ID or the recording device name of the recording device that has recorded the V signal, and the date and time when the AV signal was last recorded on the optical disk.

When the power supply 5 stops the power supply during recording (step S2301), the power supply control unit 8 detects the stop of the power supply (step S2302), and the system control means 6 switches the power supply 5 to the standby power supply 7. (Step S23
03). Using the backup power supply 7 as a power source, management information to be held is selected out of management information stored in the semiconductor memory 2 (step S2304), and the data amount of the management information is reduced to a size that can be accommodated in the backup memory 20. Reduce. Then, disk information is generated (step S2305), and the selected management information and the generated disk information are stored in the backup memory 20 (step S2305).
2306), the backup memory 20 is held in the backup state by the backup power supply 7 (step S230).
7), end.

Next, the recovery operation in the eighth embodiment of the present invention will be described with reference to FIGS. FIG. 24 shows the power supply 5 according to the eighth embodiment of the present invention.
7 is a flowchart showing an operation of recovering by comparing disc information indicating a recording state of the disc with held disc information after restarting power supply.

After the power supply 5 resumes power supply, disk information is read from the optical disk 31 (step S240).
1) Read disk information and backup memory 2
The disc information held at 0 is compared to confirm whether or not to perform recovery. First, it is determined from the file open information or the file close information whether recording of the immediately preceding AV signal has been completed normally or abnormally (step S2402). If the file is closed, it is regarded that the recording has been completed normally, and the processing ends. if,
If the file is open, check the following. Next, the optical disk 31 set in the optical disk recording / reproducing unit 3 based on the optical disk ID information such as the disk name or disk number for specifying the optical disk,
It is checked whether the disc is a disc on which an AV signal corresponding to the management information backed up is recorded (step S2403). If the disc ID information does not match, the process ends without performing recovery. If the disk ID
If the information matches, perform the following checks. Next, from the ID information of the recording device, the recording device that last recorded the AV signal is:
It is checked whether the recording information is the same as the recording device that backs up the management information (step S2404). If the ID information of the recording device does not match, the process ends without performing the recovery. If the ID information matches, the following confirmation is performed. Next, the date and time of the last recording on the disk (hereinafter referred to as the last update date and time) and the management information are stored in the backup memory 2.
By comparing the date and time held at 0 (hereinafter referred to as the held date and time), it is confirmed whether or not recording was performed on the optical disk after the management information was backed up (step S240).
5). Here, the last updated date and time is the disk information read from the optical disk 31, and the held date and time is the disk information held in the backup memory 20. If the last update date and time is earlier than the retention date and time, it is determined that recording has not been performed on the optical disk after backing up the management information, and recovery is performed (step S2406). If the last update date and time is later than the hold date and time, it is considered that some recording has been performed on the optical disk after the management information has been backed up, and the process ends without performing recovery.

The recovery operation in step S2406 is performed from step S304 to step S3 in FIG.
This is the same operation as 06, and the description is omitted.

By performing the above operation, when a disk requiring recovery is taken out and additional recording or overwrite recording is performed by another recording device, it can be detected easily and accurately, and the disk can be recovered. There is an effect that it is possible to easily determine whether or not recovery can be performed and to perform recovery.

Further, it is possible to take out a disk requiring recovery from the recording / reproducing apparatus, perform recording / reproducing on another disk, and then set the disk requiring recovery in the recording / reproducing apparatus again to perform recovery. effective.

By the way, when disk information is recorded on the optical disk 31, it is possible to perform recovery by a recording device equipped with the same recovery algorithm, even if the recording devices are not exactly the same. Further, even when the disk information is held in the backup memory 20, the held disk information is transferred to another recording device equipped with the same recovery algorithm, and recovery is performed based on the disk information transferred by the recording device. It is possible to do. The transfer in this case is performed by replacing the backup memory 20 between the recording devices, temporarily downloading the held management information to an optical disk, playing back the optical disk with another device, and uploading the downloaded management information, using a communication cable. And transfer between the recording devices. However, when performing recovery by another recording device, the ID information of the recording device does not need to be exactly the same in the confirmation of the ID information of the recording device in step S2404, and it is confirmed that the recording device has the same recovery algorithm. If possible.

Thus, even if a part of the recording device that has backed up the management information has failed, recovery can be performed by another recording device, and the recorded AV signal cannot be reproduced. There is an effect that the state can be avoided.

In the above embodiment, the backup memory 20 may be a D-RAM or an S-RAM, but may be realized by using a device such as a hard disk, and the same effect is obtained.

[0166]

According to the present invention, when power cannot be supplied from the main power supply during recording of an AV signal, a data size or an entry is selected from management information of the AV signal by using a spare power supply as a power supply. Since the data is temporarily written and held in the data storage means, the management information can be held or recorded with a small amount of power.

Also, when the main power supply cannot supply power while the AV signal is being recorded by the video / audio recording / reproducing means,
The power is supplied from the backup power source, the recording of the AV signal is automatically stopped, and the entry of the management information of the last recorded AV signal is transferred to the area closest to the recording stop position on the recording medium following the AV signal. Since the video / audio recording / reproducing means records the information, management information can be recorded without using a data storage means such as a memory. Thus, there is an effect that the amount of power consumed in the management information recording can be reduced.

Also, while recording the AV signal by the video / audio recording / reproducing means, the remaining power of the battery is reduced to the power required to record the minimum necessary management information among the management information of the AV signal. When the power control means detects that the data size or the entry is selected from the management information of the AV signal, the data is temporarily written and held in the data storage means, so that the necessary amount of power is minimized with a small amount of power. This has the effect of retaining the management information of

Further, during recording of the AV signal by the video / audio recording / reproducing means, the remaining power of the battery is reduced to the amount of power necessary for recording the minimum necessary management information of the management information of the AV signal. When the power control means detects that the recording of the AV signal is automatically stopped, the entry of the management information of the last recorded AV signal is changed from the recording stop position on the recording medium following the AV signal. Since the video and audio recording / playback means recorded in the closest area,
The management information can be recorded without using a data storage means such as a memory, and the management information recording on the disc in an emergency can be completed in a short time as described above. The amount of power to be used can be reduced, and the recording time of the AV signal can be extended by the reduced amount of power.

If the main power supply cannot supply power during recording of the AV signal, the backup power supply is used as a power supply to select a data size or an entry from the management information of the AV signal. Is compressed and then temporarily written and held in the data storage means, so that the required capacity of the data storage means can be reduced, and the necessary management information can be held with a smaller amount of power. There is.

Also, when the main power supply cannot supply power while recording the AV signal by the video / audio recording / reproducing means,
The power is supplied from the standby power supply, the recording of the AV signal is automatically stopped, the entry is selected from the management information of the last recorded AV signal, and the selected management information is signal-compressed. Since the video / audio recording / reproducing means records in the area closest to the recording stop position on the recording medium, the management information can be recorded without using a data storage means such as a memory. It is possible to complete the recording of the management information on the disk in an emergency in a short time, so that there is an effect that the amount of power consumed by the recording of the management information can be reduced.

During recording of the AV signal by the video / audio recording / reproducing means, the remaining power of the battery is reduced to the amount of power necessary to record the minimum necessary management information among the management information of the AV signal. When the power control unit detects that the data size or the entry is selected from the management information of the AV signal, the selected management information is signal-compressed, and then temporarily written and held in the data storage unit. Therefore, the required capacity of the data storage means can be reduced, and the required minimum amount of management information can be held with a smaller amount of power.

Further, during recording of the AV signal by the video / audio recording / reproducing means, the remaining power of the battery is reduced to the power required to record the minimum necessary management information of the management information of the AV signal. That is, when the power control means detects that the recording of the AV signal is automatically stopped, the entry is selected from the management information of the last recorded AV signal, and the selected management information is signal-compressed. Following the AV signal, the video / audio recording / reproducing means records in the area closest to the recording stop position on the recording medium, so that the management information can be recorded without using a data storage means such as a memory. However, the recording of the management information on the disc in an emergency as described above can be completed in a shorter time, and the effect of reducing the amount of power consumed by the recording of the management information can be obtained. That.

After the main power supply is restored to a state in which power can be supplied, signal expansion is performed, if necessary, based on the minimum necessary management information held or recorded in the data storage means or the recording medium. Since the management information is regenerated and the video / audio recording / reproducing unit performs recovery for recording the regular management information at a proper position, there is an effect that the last recorded AV signal can be reproduced.

After the battery is restored to a state in which power can be supplied, signal expansion is performed, if necessary, based on the minimum necessary management information held or recorded in the data storage means or the recording medium, and normal management is performed. Since the information is regenerated and the video / audio recording / reproducing means performs recovery for recording the regular management information at a regular position, there is an effect that the last recorded AV signal can be reproduced.

After recovering to a state where the main power supply or the battery can supply power, the recovery is performed immediately or
Since you can choose whether to not perform recovery, you can transfer the amount of power saved by not recovering to video and audio recording and record for a longer time,
By not performing recovery, the time required for recovery can be saved, and recording can be started more quickly.

If the power control means detects that the remaining power of the battery has decreased to the power required to record the minimum necessary management information during the recording of the AV signal, at least the signal Stop supplying power to the input means,
In addition, since power supply to at least the system control means is continued, there is an effect that management information is held or recorded with less power, and recording can be performed for a longer time with saved power.

In addition, since the recording medium can be taken out from the video / audio recording / reproducing means after at least the minimum necessary management information has been recovered, the recording medium may be mistakenly recorded last before the recovery. There is an effect that the overwritten AV signal is not overwritten.

Further, the recording medium information indicating the recording state of the recording medium is temporarily written in the data storage means. Therefore, when the recording medium is taken out and additional recording or overwriting recording is performed by another recording apparatus, Has the effect that it can be easily detected.

When the recording medium information and the recording state of the recording medium match, recovery is performed. Therefore, even if the recording medium is removed before recovery and the recording medium is set again, the recovery of the recording medium is performed. There is an effect that it is possible to easily determine whether or not recovery can be performed and to perform recovery.

[Brief description of the drawings]

FIG. 1 is a block diagram of a video / audio recording / reproducing apparatus according to first and eighth embodiments of the present invention.

FIG. 2 is a flowchart illustrating an operation of holding management information in the video / audio recording / reproducing apparatus according to the first embodiment of the present invention.

FIG. 3 is a flowchart showing an operation of recovering management information in the video / audio recording / reproducing apparatus according to the first embodiment of the present invention.

FIG. 4 is a block diagram of a video / audio recording / reproducing apparatus according to a second embodiment and a fifth embodiment of the present invention.

FIG. 5 is a flowchart showing an operation of recording management information in one place in the video / audio recording / reproducing apparatus according to the second embodiment of the present invention.

FIG. 6 is a flowchart showing an operation of recovering management information in the video / audio recording / reproducing apparatus according to the second embodiment of the present invention.

FIG. 7 is a block diagram of a video / audio recording / reproducing apparatus according to a modification of the second embodiment of the present invention.

FIG. 8 is a flowchart illustrating an operation of recording management information in a video / audio recording / reproducing apparatus according to a modification of the second embodiment of the present invention.

FIG. 9 is a flowchart illustrating an operation of recovering management information in a video / audio recording / reproducing apparatus according to a modification of the second embodiment of the present invention.

FIG. 10 is a flowchart showing an operation of compressing and holding management information in the video / audio recording / reproducing apparatus according to the third embodiment of the present invention.

FIG. 11 is a flowchart showing an operation of expanding and recovering management information in a video / audio recording / reproducing apparatus according to a third embodiment of the present invention.

FIG. 12 is a flowchart showing an operation of compressing management information and recording the management information in one place in the video / audio recording / reproducing apparatus according to the fourth embodiment of the present invention.

FIG. 13 is a flowchart showing an operation when the management information is decompressed and recovered in the video / audio recording / reproducing apparatus according to the fourth embodiment of the present invention.

FIG. 14 is a flowchart showing an operation of a user selecting recovery of management information in the video / audio recording / reproducing apparatus according to the fifth embodiment of the present invention.

FIG. 15 is a block diagram of a video / audio recording / reproducing apparatus according to a sixth embodiment of the present invention.

FIG. 16 is a flowchart showing an operation of stopping power supply unnecessary for recording management information in the video / audio recording / reproducing apparatus according to the sixth embodiment and a modification of the sixth embodiment.

FIG. 17 is a block diagram of a video / audio recording / reproducing apparatus according to a modification of the sixth embodiment of the present invention.

FIG. 18 is a block diagram of a video / audio recording / reproducing apparatus according to a seventh embodiment of the present invention.

FIG. 19 is a flowchart showing an operation for locking ejection of a disc in a video / audio recording / reproducing apparatus according to the seventh embodiment and a modification of the seventh embodiment of the present invention.

FIG. 20 is a flowchart showing an operation of releasing a disc ejection lock in a video / audio recording / reproducing apparatus according to the seventh embodiment and a modification of the seventh embodiment of the present invention.

FIG. 21 is a block diagram of a video / audio recording / reproducing apparatus according to a modification of the seventh embodiment of the present invention.

FIG. 22 is a block diagram of a video / audio recording / reproducing apparatus according to a modification of the seventh embodiment of the present invention.

FIG. 23 is a flowchart illustrating an operation of retaining disc information in the video / audio recording / reproducing apparatus according to the eighth embodiment of the present invention.

FIG. 24 is a flowchart illustrating an operation of performing recovery if the held disc information and the disc information of the set disc match in the video / audio recording / reproducing apparatus according to the eighth embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Input / output means, 11 ... Tuner, 12 ... Interface part, 13 ... Switching means, 2 ... Semiconductor memory, 20 ... Backup memory, 3 ... Optical disk recording / reproducing part, 31 ...
Optical disk, 32: Pickup unit, 33: Disk
Locking means, 4 ... signal processing means, 41 ... CODEC, 4
2 MPU, 5 power supply, 6 system control means, 7 standby power supply, 8 power supply control unit, 80 power supply destination selection means,
9 ... Signal input means, 91 ... Microphone, 92 ... ADC, 93
... CCD sensor, 94 ... DSP, 100 ... battery, 1
10: battery with function, 1101: battery control unit.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Morio Aoki 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture In the Visual Information Media Division of Hitachi, Ltd.

Claims (31)

[Claims] An audio / video recording / reproducing means for recording or reproducing an AV signal and management information such as a recording address, an entry and a data size of the AV signal on a disk-shaped recording medium; a data storage means for storing the management information; A main power supply for supplying power to the entire apparatus, a standby power supply for supplying power when the main power supply cannot supply power, the video / audio recording / reproducing means, the data storage means, the main power supply, and the standby power supply. And a system control unit for controlling the power supply. When the main power supply cannot supply power while the AV signal is being recorded by the video / audio recording / reproducing means, power is supplied from the standby power supply, and the management information of the AV signal is provided. Wherein the system control means controls to select a data size and temporarily write the data size to the data storage means. 2. A video / audio recording / reproducing means for recording / reproducing management information such as an AV signal and a recording address, an entry and a data size of the AV signal on a disk-shaped recording medium; a data storage means for storing the management information; A main power supply for supplying power to the entire apparatus, a standby power supply for supplying power when the main power supply cannot supply power, the video / audio recording / reproducing means, the data storage means, the main power supply, and the standby power supply. And a system control unit for controlling the power supply. When the main power supply cannot supply power while the AV signal is being recorded by the video / audio recording / reproducing means, power is supplied from the standby power supply, and the management information of the AV signal is provided. Wherein the system control means controls to select an entry from among the entries and temporarily write the entry to the data storage means. 3. A video / audio recording / reproducing means for recording or reproducing AV signals and management information such as recording addresses, entries and data sizes of the AV signals on a disk-shaped recording medium, and a main power supply for supplying power to the entire apparatus. An auxiliary power supply for supplying power when the main power supply cannot supply power; a video / audio recording / reproducing means; and a system control means for controlling the main power supply and the auxiliary power supply. When the main power supply cannot supply power during recording of the AV signal, power is supplied from the standby power supply, recording of the AV signal is automatically stopped, and the last recorded AV signal is recorded.
Following the AV signal, the entry in the signal management information is set in the area closest to the recording stop position on the recording medium,
A video / audio recording / reproducing apparatus characterized in that the system control means controls the video / audio recording / reproducing means to record. 4. An audio / video recording / reproducing means for recording / reproducing management information such as an AV signal and a recording address, an entry and a data size of the AV signal on a disk-shaped recording medium; a data storage means for storing the management information; Battery for supplying power to the entire apparatus, power control means for detecting the remaining power of the battery, system control means for controlling the video / audio recording / reproducing means, the data storage means, the main power supply, and the power control means And the video / audio recording / reproducing means
While recording the V signal, the remaining power of the battery is
When the power control unit detects that the power amount required to record at least the minimum necessary management information including at least the data size in the management information of the signal has been reduced, the management information of the AV signal A video / audio recording / reproducing apparatus characterized in that the system control means controls a data size to be selected and temporarily written to the data storage means. 5. An audio / video recording / reproducing means for recording / reproducing management information such as an AV signal and a recording address, an entry and a data size of the AV signal on a disk-shaped recording medium; a data storage means for storing the management information; A battery for supplying power to the entire apparatus; a power control unit for detecting a remaining power amount of the battery; a backup power supply for backing up management information stored in the data storage unit; a video / audio recording / reproducing unit; A storage unit, the battery, the power supply control unit, and a system control unit for controlling the standby power supply, wherein while the video / audio recording / reproducing unit is recording the AV signal, the remaining power of the battery is used to manage the AV signal. The power supply control means detects that the amount of power has been reduced to a power amount necessary for recording the minimum necessary management information including at least the data size of the information. At that point, as to select the data size of the management information of the AV signal is temporarily written into the data storage unit, to back up the backup power,
A video / audio recording / reproducing apparatus controlled by the system control means. 6. A video / audio recording / reproducing means for recording / reproducing management information such as an AV signal and a recording address, an entry and a data size of the AV signal on a disk-shaped recording medium; a data storage means for storing the management information; A battery for supplying power to the entire apparatus, power control means for detecting the remaining power of the battery, system control means for controlling the video and audio recording / reproducing means, the data storage means, the battery, and the power control means. While the video / audio recording / reproducing means is recording an AV signal,
When the power control unit detects that the amount of power required to record the minimum necessary management information including at least the entry among the management information of the V signal has been reduced, the A
A video / audio recording / reproducing apparatus characterized in that the system control means controls such that an entry is selected from the management information of the V signal and is temporarily written to the data storage means. 7. A video / audio recording / reproducing means for recording / reproducing management information such as an AV signal and a recording address, an entry and a data size of the AV signal on a disk-shaped recording medium, a data storage means for storing the management information, A battery for supplying power to the entire apparatus; a power control unit for detecting a remaining power amount of the battery; a backup power supply for backing up management information stored in the data storage unit; a video / audio recording / reproducing unit; A storage unit, the battery, the power supply control unit, and a system control unit for controlling the standby power supply, wherein while the video / audio recording / reproducing unit is recording the AV signal, the remaining power of the battery is used to manage the AV signal. When the power supply control unit detects that the amount of power has been reduced to a necessary amount for recording the minimum necessary management information including at least the entry among the information. Wherein the system control means controls to select an entry from among the management information of the AV signal, temporarily write the entry into the data storage means, and back up the data with the backup power supply. Playback device. 8. A video / audio recording / reproducing means for recording or reproducing AV signals and management information such as recording addresses, entries and data sizes of the AV signals on a disk-shaped recording medium, a battery for supplying power to the entire apparatus, Power supply control means for detecting the amount of remaining power of the battery; video / audio recording / reproduction means; and system control means for controlling the battery and the power supply control means.
The power control unit determines that the remaining power amount of the battery has decreased to a power amount necessary for recording minimum necessary management information including at least an entry in the management information of the AV signal during recording of the signal. Upon detection by the means, the recording of the AV signal is automatically stopped, and the entry in the management information of the last recorded AV signal is changed to the entry following the AV signal.
A video / audio recording / reproducing apparatus characterized in that the system control means controls the video / audio recording / reproducing means to record in an area closest to a recording stop position on the recording medium. 9. The video / audio recording / reproducing apparatus according to claim 1, further comprising signal compression means for compressing a signal, wherein said signal compression means compresses the data size and then temporarily stores said data. A video / audio recording / reproducing apparatus controlled by the system control means so as to write the data into the video / audio recording apparatus. 10. The video / audio recording / reproducing apparatus according to claim 4, further comprising signal compression means for compressing a signal, said signal compression means compressing said data size, and temporarily A video / audio recording / reproducing apparatus, wherein the system control means controls the data to be written in the data storage means. 11. The video / audio recording / reproducing apparatus according to claim 2, further comprising signal compression means for compressing a signal, said signal compression means compressing said entry, and temporarily storing said entry in said data storage means. A video / audio recording / reproducing apparatus characterized in that the system control means controls to write. 12. The video / audio recording / reproducing apparatus according to claim 3, further comprising signal compression means for compressing a signal, said signal compression means compressing said entry, and then temporarily writing to said recording medium. A video / audio recording / reproducing apparatus controlled by the system control means as described above. 13. The video / audio recording / reproducing apparatus according to claim 6, further comprising: signal compression means for compressing a signal, wherein said signal compression means compresses said entry to a signal and temporarily stores said signal. Like writing to data storage means,
A video / audio recording / reproducing apparatus controlled by the system control means. 14. The video / audio recording / reproducing apparatus according to claim 8, further comprising signal compression means for compressing a signal, said signal compression means compressing said entry, and then temporarily writing to said recording medium. A video / audio recording / reproducing apparatus controlled by the system control means as described above. 15. The video / audio recording / reproducing apparatus according to claim 1, wherein the minimum necessary management information held in the data storage means after the main power supply is restored to a state where power can be supplied. A video / audio recording / reproducing device, wherein the video / audio recording / reproducing means performs recovery for recording the proper management information at a proper position. 16. The video / audio recording / reproducing apparatus according to claim 3, wherein, after the main power supply is restored to a state in which power can be supplied, a normal management information recorded on the recording medium is used. Wherein the video / audio recording / reproducing means performs recovery for recording the regular management information at a proper position. 17. A method according to claim 4 or claim 5 or claim 6.
Alternatively, in the video / audio recording / reproducing apparatus according to claim 7, after the battery is restored to a state in which power can be supplied, regular management information is stored based on the minimum management information held in the data storage unit. A video / audio recording / reproducing apparatus, wherein the video / audio recording / reproducing device performs recovery by regenerating the video / audio recording / reproducing means to record the regular management information at a proper position. 18. The video / audio recording / reproducing apparatus according to claim 8, wherein, after the battery is restored to a state in which power can be supplied, a proper information is recorded based on minimum necessary management information recorded on the recording medium. A video / audio recording / reproducing apparatus, wherein management information is regenerated, and the video / audio recording / reproducing means performs recovery for recording the regular management information at a proper position. 19. The video / audio recording / reproducing apparatus according to claim 9, further comprising signal expansion means for expanding a compressed signal, wherein said data storage means stores the data in said data storage means after the main power supply is restored to a state where power can be supplied. The held minimum necessary management information is expanded by the signal expansion means, and the regular management information is regenerated based on the expanded management information. A video / audio recording / reproducing apparatus for performing recovery for recording a video. 20. The video / audio recording / reproducing apparatus according to claim 10, further comprising signal expansion means for expanding the compressed signal, wherein the data storage means retains the data in the data storage means after the battery is restored to a state capable of supplying power. The required minimum management information is expanded by the signal expansion unit, and regular management information is regenerated based on the expanded management information, and the video / audio recording / reproduction unit stores the normal management information in a normal position. A video / audio recording / reproducing apparatus for performing a recording recovery. 21. The video / audio recording / reproducing apparatus according to claim 11, further comprising signal decompression means for decompressing the compressed signal, and wherein said data storage means is restored after said main power supply is restored to a state where power can be supplied. The held minimum necessary management information is expanded by the signal expansion means, and the regular management information is regenerated based on the expanded management information. A video / audio recording / reproducing apparatus for performing recovery for recording a video. 22. The video / audio recording / reproducing apparatus according to claim 12, further comprising signal decompression means for decompressing the compressed signal, and recording the data on the recording medium after the main power supply recovers to a state where power can be supplied. The required minimum management information is expanded by the signal expansion unit, and regular management information is regenerated based on the expanded management information, and the video / audio recording / reproduction unit stores the normal management information in a normal position. A video / audio recording / reproducing apparatus for performing a recording recovery. 23. The video / audio recording / reproducing apparatus according to claim 13, further comprising signal expansion means for expanding the compressed signal, and holding the data in the data storage means after the battery is restored to a state capable of supplying power. The required minimum management information is expanded by the signal expansion unit, and regular management information is regenerated based on the expanded management information, and the video / audio recording / reproduction unit stores the normal management information in a normal position. A video / audio recording / reproducing apparatus for performing a recording recovery. 24. The video / audio recording / reproducing apparatus according to claim 14, further comprising signal decompression means for decompressing the compressed signal, wherein said signal is recorded on said recording medium after the battery is restored to a state where power can be supplied. The necessary minimum management information is expanded by the signal expansion means, and the normal management information is regenerated based on the expanded management information, and the video / audio recording / reproduction means records the normal management information at a normal position. A video / audio recording / reproducing apparatus characterized by performing recovery. 25. The video / audio recording / reproducing apparatus according to claim 15, 16 or 19, 21 or 22, wherein the main power supply is restored to a state where power can be supplied. A video / audio recording / reproducing apparatus characterized in that it is possible to select whether to perform recovery or not to perform recovery after detection by a power control unit. 26. The video / audio recording / reproducing apparatus according to claim 17, claim 18, claim 20, claim 20, claim 23, or claim 24, wherein at least the amount of power required to record regular management information. A video / audio recording / reproducing apparatus, which can select whether to perform recovery or not to perform recovery after the power control unit detects that the remaining power of the battery has recovered. 27. Claim 4 or Claim 5 or Claim 6
Alternatively, the video / audio recording / reproducing apparatus according to claim 7, further comprising a power supply destination selecting means for switching a power supply destination, wherein the video / audio recording / reproducing means is provided. During the recording of the AV signal, the power control means detects that the remaining power of the battery has decreased to the power required to record the minimum necessary management information among the management information of the AV signal. The power supply destination is switched by the power supply destination selection means so that at least the power supply to the signal input means is stopped and the power supply to the system control means is continued at least. Video and audio recording and playback device. 28. Claim 15 or claim 16 or claim 17 or claim 18 or claim 19 or claim 20 or claim 21 or claim 22 or claim 2
25. The video / audio recording / reproducing apparatus according to claim 3 or 24, further comprising: a recording medium removal control unit configured to control removal of the recording medium, and after performing the recovery of at least the minimum necessary management information, perform the video / audio recording. As it is possible to take out the recording medium from the reproducing means,
A video / audio recording / reproducing apparatus, wherein the system control means controls the recording medium removal control means. 29. Claim 1 or Claim 2 or Claim 4
Alternatively, in the video / audio recording / reproducing apparatus according to claim 5, the recording medium information such as the ID information of the recording medium and the last recording date and time is temporarily written in the data storage means. A video / audio recording / reproducing apparatus controlled by the system control means. 30. The video / audio recording / reproducing apparatus according to claim 3, further comprising data storage means for storing management information, wherein recording medium information such as ID information of the recording medium and last recording date and time is stored. The video / audio recording / reproducing apparatus, wherein the system control unit controls the data to be temporarily written to the data storage unit. 31. The video / audio recording / reproducing apparatus according to claim 29, wherein the first recording medium information written in the data storage means and the recording medium to be recorded / reproduced by the video / audio recording / reproducing means are provided. The video / audio recording / reproducing apparatus is characterized in that the system control means controls so as to perform recovery if the second recording medium information matches.