JP2000187939A - Recorder, reproducer and recorder/reproducer device, recording and reproducing method for video/audio data and medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continuously perform rewrite recording like prerecording by setting an AV file management table that contains correspondence information between the recording area and the AV file of a recording medium and by recording video and/or audio data against such recording area. SOLUTION: First, an interface circuit 11 receives a signal of an AV file forming command and transfers it to a hard disk control circuit 12. The hard disk control circuit 12 newly forms an AV file for a size specified by an AV file size specifying parameter. At this point of time, the AV file is set on a hard disk 16 as a repeated recording area. Next, upon receiving a signal of a recording operation setting command, the hard disk control circuit 12 sets the rewrite mode, for which recording is specified, in the AV file. Furthermore, by receiving a signal of an AV file rewrite recording command, the hard disk control circuit 12 starts rewrite recording against the AV file.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus or a recording / reproducing method using a magnetic disk or the like, and more particularly to recording or reproducing real-time data such as AV (Audio Visual) data. The present invention relates to a video / audio data recording device, a video / audio data reproducing device, a video / audio data recording / reproducing device, a video / audio data recording method, a video / audio data reproducing method, and a medium.

[0002]

2. Description of the Related Art In recent years, both the recording capacity and the transfer speed of a disk device have been rapidly increasing, and it has become possible to handle serial data such as moving image data. Such serial data is recorded and reproduced. AV equipment using a hard disk drive for this purpose has been developed.

FIG. 11 is a diagram showing the configuration of a conventional video / audio data recording / reproducing apparatus. In the figure, 1
Reference numeral 00 denotes a video / audio data recording / reproducing apparatus. Reference numeral 101 denotes input / output of video / audio data (hereinafter, AV data) to / from the video / audio data recording / reproducing apparatus 100, and operates each part of the video / audio data recording / reproducing apparatus 100. And 102, an actuator drive circuit.
03 is a buffer RAM, 104 is a read / write signal processing circuit, and 105 is a hard disk.

[0004] The basic operation of the video / audio data recording / reproducing apparatus according to the prior art having such a configuration is as follows.
01 from the buffer RA.
While temporarily storing data in the M103,
5 is transferred to the hard disk 105
It is to record data.

A read / write signal processing circuit 104
Detects the AV data recording position of the hard disk 105 and transfers it to the control circuit 101.
When an actuator drive signal is generated based on the recording position and output to the actuator drive circuit 102, the actuator drive circuit 102 transfers the drive signal to the hard disk 105. This drive signal and the control circuit 101
By directly controlling the operation of the hard disk 105 with the read / write signal generated by the signal processing circuit 104 based on the read / write control signal from It can be carried out.

Further, in a recording / reproducing apparatus using a hard disk, such as the video / audio data recording / reproducing apparatus 100 described above, a pre-recording (Pre-Recording) function utilizing the high-speed accessibility of the hard disk is realized. The pre-recording function means that a predetermined area of the hard disk is repeatedly overwritten with video for a certain period of time in advance, and when performing the original recording, it is added to the overwritten video and the original The video is recorded, whereby the user can view the video that has been traced back a certain time from the start of the recording. In the video / audio data recording / reproducing apparatus 101, the pre-recording function is controlled by the control circuit 101 by the read / write signal processing circuit 10
4 and the actuator drive circuit 102 as appropriate.

On the other hand, IEEE (Institute) is used as a standard interface for connecting general digital AV equipment.
of Electrical and Electronics Engineers) 1394
Serial buses conforming to the standard are spreading.

FIG. 12 is a diagram showing a configuration in which various AV devices and related devices are connected via an IEEE 1394 bus. In the figure, reference numeral 110 denotes a video / audio data recording / reproducing device. Reference numeral 120 denotes a controller, which is realized by, for example, a computer. Reference numeral 121 denotes a digital monitor for outputting AV data, which is digital data, as an image.
Reference numeral 22 denotes a VTR for recording and reproducing AV data.
Reference numeral 23 denotes a tuner for selecting a broadcasting station that is a resource of AV data.
An IEEE 1394 serial bus for exchanging various signals such as V data and control commands.

As shown in FIG. 12, each device can exchange control information such as digital AV data and commands for controlling connected devices by way of a 1394 serial bus. If a control command is issued using the personal computer, one personal computer can control all the AV devices connected to the 1394 serial bus.

As a command set used on the 1394 serial bus, for example, AV / C (Audio Video / Co
ntrol) command set. Using the AV / C command, the controller 120 can control the AV equipment corresponding to the AV / C command set, that is, the digital monitor 121, the tuner 123, and the video / audio data recording / reproducing device 110 in FIG.

A conventional AV device control command typified by the AV / C command set includes a command for controlling the recording and reproducing operations of the video / audio data recording / reproducing apparatus, and a command for reproducing or performing the operation. In addition to a command, a recording command for performing a recording operation, and a stop command for stopping a reproduction / recording operation, there is a search command for moving a recording and reproduction position on a hard disk.

With such a conventional control command,
The recording operation of the AV data by controlling the video / audio data recording / reproducing device 110 is as follows. That is, the controller 120 issues the search command, moves the recording / reproducing position to a predetermined position on the recording medium, issues the recording command after the movement is completed, and starts the recording operation. To stop the recording operation, a stop command is issued to stop the recording. If you do not issue a stop command,
The recording / reproducing apparatus ends the recording operation when it reaches the end of the recording area.

By the way, if the pre-recording function described above is to be realized in a device connected by an IEEE1394 serial bus interface, it is necessary to use several AV device control commands in cooperation.

FIG. 13 shows the sequence of each command when repeated recording is attempted on a predetermined area on a hard disk so that pre-recording can be realized using the above-mentioned conventional AV device control command set. FIG. Hereinafter, an operation procedure in a case where a pre-recording function is attempted by a conventional AV device control command will be described with reference to the drawings.

The controller 120 first sends a search command 13 to the video / audio data recording / reproducing apparatus 110.
Issue 0. The video / audio data recording / reproducing device 110
When the search command 130 is received, the AV data recording position is moved to a predetermined position on the internal hard disk, and the preparation for recording the AV data is set.

Next, the controller 120 issues a recording command 140. Video / audio data recording / reproducing device 11
0, upon receiving the recording command 140, starts recording the AV data from the above-mentioned predetermined position.

While the recording of the AV data is being performed, the controller 120 issues a search command 130 again when confirming the final position of the predetermined area and the determined position.
Upon receiving the reissued search command 130, the video / audio data recording / reproducing device 110 stops the recording operation,
Next, the recording operation returns to the beginning of the predetermined recording area determined by the first search command, and the recording operation is restarted. Hereinafter, each time the controller 120 confirms the predetermined final area, the search command 130 is issued, and recording is repeatedly performed by overwriting.

A video / audio data recording / reproducing device 110
To stop the recording operation itself, the controller 1
20 sends a stop command 150. Upon receiving the stop command, the video / audio data recording / reproducing device 110 stops the recording operation.

[0019]

According to the prior art, I
The procedure for controlling the AV equipment connected to the IEEE 1394 serial bus by the control command to realize the pre-recording function is as described above. However, in this operation, the controller 120 always repeatedly checks the position of the area to be recorded and issues the search command 140 in accordance with the check, which is a heavy burden on the controller 120. Operation.

A video / audio data recording / reproducing device 110
On the side of, a time lag occurs during the process of receiving the search command 140, confirming the command, and moving the recording position, and there is a possibility that AV data to be recorded may be missing.

Therefore, the function of repeatedly overwriting AV data in a certain area, such as pre-recording, cannot be sufficiently realized when using the above-mentioned control command according to the conventional technique.

Further, when a recording and reproduction area of a predetermined size is set for a specific use such as pre-recording, the recording area of the predetermined size is secured on a hard disk and used for other purposes. Need to be kept away. In the video / audio data recording / reproducing apparatus 110 according to the related art, such a specific area is directly managed in advance by the system side, and the user can freely use the recording area via the controller 120. Was distinguished. That is, there is no control command for securing the area as described above in the related art.

Therefore, as long as the video / audio data recording / reproducing device connected to the IEEE serial bus 1394 according to the prior art is used, the user can perform pre-recording,
It is not possible to flexibly use the recording area according to the application.

[0024] The present invention has been made in view of the above-mentioned problems, and operates in connection with another digital AV device via a bus. A video / audio data recording device, a video / audio data recording / reproducing device, a video / audio data recording method, a video / audio data recording method, and a predetermined region which can be set arbitrarily, such as pre-recording, capable of continuously performing overwrite recording. A video / audio data recording device, a video / audio data recording / reproducing device, a video / audio data recording / reproducing method, a video / audio data recording / reproducing method, and a video / audio data reproducing device, a video / audio data recording / reproducing device for reproducing data recorded by any of the media. It is an object to obtain an apparatus, a video / audio data reproducing method and a medium.

[0025]

In order to achieve the above-mentioned object, a first aspect of the present invention (corresponding to claim 1) comprises a video and / or
Or, a recording medium for recording audio data, recording area recording means for recording video and / or audio data in a recording area in the recording medium, and receiving a control command from a device connected via a bus AV (Audio Visuance)
al) When a command to generate a file is received, an AV file management table including correspondence information between the recording area of the recording medium and the AV file is set, and A of a predetermined size is set.
A video / audio data recording device comprising: an AV file management means for generating a V file; wherein the recording area recording means records video and / or audio data for the recording area based on the AV file management table. A video and audio data recording device for performing recording.

The second invention (corresponding to claim 2)
Wherein the recording area recording means records video and / or audio data by repeatedly overwriting a recording area corresponding to the AV file based on the AV file management table. A video and audio data recording device according to (1).

The third invention (corresponding to claim 4)
Comprises a recording medium for recording video and / or audio data, a recording area recording means for recording video and / or audio data in a recording area in the recording medium, and a device connected via a bus. Command receiving means for receiving the control command of the, by the command receiving means,
An audio / video data recording device comprising: an AV file maximum size setting means for setting the maximum size in an AV file management table when a maximum size setting command for defining a maximum size of an AV file is received, The recording means is a video and audio data recording device for recording video and / or audio data in the recording area based on the AV file management table.

The fourth invention (corresponding to claim 5)
Means that the recording area recording means sets the AV file based on the maximum AV file size in the AV file management table.
The video and audio data recording apparatus according to claim 4, wherein recording of video and / or audio data is performed by repeatedly overwriting a recording area corresponding to a file.

The fifth invention (corresponding to claim 7)
Is connected via a bus to a recording medium for recording video and / or audio data, AV file management means for managing an AV file management table including correspondence information between recording areas of the recording medium and AV files. 7. A command receiving means for receiving a control command from a device, and a reproduction for receiving the control command and reproducing video and / or audio data recorded in the video / audio data recording apparatus according to claim 1. Means for reproducing audio / video data, the command receiving means comprising:
A playback command command for performing a playback operation on the data of the file is received, and the playback unit includes:
The video and audio data reproducing device is characterized in that, upon receiving the reproduction command, the video and / or audio data is reproduced from the recording area based on the AV file management table.

The sixth invention (corresponding to claim 11)
Is a combination of the video / audio data recording device according to any one of claims 1 to 6 and the video / audio data reproduction device according to any one of claims 7 to 10. It is a playback device.

Further, the seventh invention (corresponding to claim 12)
Comprises a recording medium for recording video and / or audio data, a recording area recording means for recording video and / or audio data in a recording area in the recording medium, and a device connected via a bus. Command receiving means for receiving the control command of the, by the command receiving means,
When receiving a command to generate an AV (Audio Visual) file, the AV server sets an AV file management table including correspondence information between the recording area of the recording medium and the AV file,
A video / audio data recording method using an AV file management means for generating an AV file of a predetermined size, wherein the recording area recording means uses the recording area recording means to store video and audio data in the recording area based on the AV file management table. And / or a step of recording audio data.

The eighth invention (corresponding to claim 13)
Is connected via a bus to a recording medium for recording video and / or audio data, AV file management means for managing an AV file management table including correspondence information between recording areas of the recording medium and AV files. A command receiving means for receiving a control command from a device and a reproducing means for receiving the control command and reproducing the video and / or audio data recorded by the video / audio data recording method according to claim 12 are used. A video / audio data reproducing method, comprising: using the command receiving means, receiving a reproduction command command for performing a reproduction operation on data of an AV file; and
A video / audio data reproducing method comprising the step of: upon receiving the reproduction command command, reproducing video and / or audio data from the recording area based on the AV file management table.

The ninth aspect of the present invention (corresponding to claim 14).
A program recording medium on which a program for causing a computer to execute all or a part of functions of each means or each part of the video / audio data recording apparatus according to any one of claims 1 to 6 is recorded. is there.

According to a tenth aspect of the present invention (corresponding to claim 15), a program for causing a computer to execute all or a part of the operation of the video / audio data recording method according to claim 12 is recorded. A program recording medium characterized by the following.

[0035]

(Embodiment 1) FIG. 1 is a diagram showing a configuration of a video / audio data recording / reproducing apparatus according to Embodiment 1 of the present invention. In the figure, reference numeral 10 denotes a video / audio data recording / reproducing device.

In the video / audio data recording / reproducing apparatus 10, the control unit 11 receives a control command input from outside the video / audio data recording / reproducing apparatus 10,
An interface circuit 12 for inputting and outputting video and audio data (hereinafter referred to as AV data). A hard disk control circuit 12 receives a control command from the interface circuit 11 and operates each unit of the video and audio data recording / reproducing apparatus 10.
3 is an actuator drive circuit, 14 is a buffer RAM
15 is a read / write signal processing circuit, and 16 is a hard disk.

The configuration and operation of each unit other than the configuration of the interface circuit 11 and the hard disk control circuit 16 are the same as those of the conventional video / audio data recording / reproducing apparatus.

FIG. 2 is a diagram showing how the video / audio data recording / reproducing apparatus according to Embodiment 1 of the present invention forms a system with other digital devices. In the figure, reference numeral 120 denotes a controller for controlling the video / audio data recording / reproducing device 10 and other connected devices; 121, a digital monitor for outputting AV data, which is digital data, as an image; and 122, which records and reproduces AV data. A VTR 123 is a tuner for selecting a broadcasting station, which is a resource of AV data. A bus 124 is for connecting the above-mentioned devices and exchanging various signals such as AV data and control commands. Here, an IEEE 1394 bus is used as an example.

FIGS. 9 (a) to 9 (g) show the format of each control command received by the video / audio data recording / reproducing apparatus 10 according to the first embodiment of the present invention and executing the instructions described therein. FIG. Hereinafter, each control command and the operation executed by each control command will be described with reference to the drawings.

First, FIG. 9A shows an AV file generation command 90, which is an AV file designation parameter as a parameter 1, and an AV file generation parameter 90 as a parameter 2.
Has an AV file size designation parameter. A
The V file designation parameter sets alternative data when transmitted from the controller 120 to the video / audio data recording / reproducing device 10, and when a response is obtained, the AV file designation parameter assigned from the video / audio data recording / reproducing device 10 is Be notified. The generated AV file is
Accessed by V-file specification parameters.

Further, the hard disk control circuit 12
When the V file generation command is received, the parameter 2
An AV file of the size specified by is generated, and information of the AV file is stored.

Next, FIG. 9B shows a recording operation setting command 91. The recording operation setting command selects a recording operation when the entire AV file is overwritten. The recording operation setting command 91 has an AV file designation parameter as the parameter 1 and a recording operation mode as the parameter 2. The recording operation mode of the parameter 2 is further divided into an overwrite mode and a stop mode.

Upon receiving the recording mode setting command, the hard disk control circuit 12 stores the recording operation mode set by the parameter 2 for the specified AV file.

Next, FIG. 9C shows the additional recording instruction command 92. The additional recording command 92 has an AV file designation parameter as the parameter 1.

Upon receiving the additional recording command command 92, the hard disk control circuit 12 starts further recording data in the designated AV file. The size of the AV file sequentially increases as data is recorded.

Next, FIG. 9D shows the AV file overwrite recording command 93. The AV file overwrite recording command 93 has an AV file designation parameter as the parameter 1.

When the hard disk control circuit 12 receives the AV file overwrite recording command 93, it starts overwriting the specified AV file and sequentially overwrites the AV file with data. Further, when all the AV files have been overwritten, the hard disk control circuit 12 selects an operation according to the set recording operation mode. When the overwrite mode is specified, the data with the oldest recording time is sequentially overwritten, and when the stop mode is specified, the recording operation is stopped.

Next, FIG. 9E shows the reproduction operation setting command 94. The playback operation setting command 94 is the generated A
A playback operation mode is set when playback of an area of the V file that has not been overwritten is instructed. The reproduction operation mode is divided into an alternative data reproduction mode and a stop mode. The playback operation setting command includes A as parameter 1
The V-file designation parameter has a reproduction operation mode as parameter 2. Playback operation setting command 94
Is received, the hard disk control circuit 12 records the reproduction operation mode set by the parameter 2.

Next, FIG. 9F shows a reproduction command 95
Is shown. The playback command 95 has an AV file designation parameter as the parameter 1.

When receiving the playback command 95, the hard disk control circuit 12 controls the playback of the specified AV file.

Finally, FIG. 9 (g) shows the stop command 96. The stop command has no parameters (reserved). Upon receiving the stop command 96, the hard disk control circuit 12 ends the recording operation and the reproducing operation.

The operation of the video / audio data recording / reproducing apparatus 10 according to the first embodiment of the present invention having the above configuration will be described below.

First, the video / audio data recording / reproducing apparatus 1
FIGS. 3 to 5 show the pre-recording operation using 0.
This will be described with reference to FIG. FIG. 3 is a diagram showing a sequence of each control command from the controller 120 to the video / audio data recording / reproducing device 10 when performing a pre-recording operation. FIG. 4 is a diagram showing the state of the hard disk 1 when performing a pre-recording operation in the first embodiment.
FIG. 6 is a diagram showing a relationship between an AV file 6 and an AV file. FIG. 5 is a diagram showing the arrangement of AV data on the hard disk 16 in two states: a state of overwrite recording as pre-recording and a state of additional recording corresponding to normal recording.

The relationship between the data arrangement on the hard disk 16 and the AV data arrangement shown in FIG. 4 is stored and managed by the hard disk control circuit 12 as an AV file management table.

As shown in FIG. 3, when an AV file generation command 90 is issued from the controller 120, in the video / audio data recording / reproducing apparatus 10, the interface circuit 11 receives the AV file generation command 90, and the hard disk control circuit 12 Transfer to The hard disk control circuit 12 newly generates the AV file 40 having the size specified by the parameter 2 AV file size specification parameter.

At this point, FIGS. 4A and 5A
As shown in (b), the AV file 40 is set as a repeated recording area 41 on the hard disk 16.

Next, the controller 120 issues a recording operation setting command 91. When the recording operation setting command 91 is received by the video / audio data recording / reproducing apparatus 10, the hard disk control circuit 12 sets the operation mode designated by the parameter 2 for recording, here the overwrite mode, in the AV file 40.

Further, the controller 120 issues an AV file overwrite recording command 93. When the video / audio data recording / playback apparatus 10 receives the AV file overwrite recording command 93, the hard disk control circuit 12
Overwrite recording on the AV file 40 is started.

The above-mentioned overwrite recording on the AV file 40 is a repetitive recording area 41 on the hard disk 16 as shown in FIGS. 4 (a) and 5 (a).
This is realized as recording of AV data in a section from the repetitive recording area start position 43 to the repetitive recording area end position 45. When the recording of the AV data is repeatedly performed up to the final position 45 of the recording area, the recording position is repeatedly returned to the recording start position 43, and the recording is repeatedly performed by overwriting. Become.

Next, when performing normal recording according to the user's intention, the above-described repetitive overwrite mode is terminated and an additional recording operation is performed. The operation of the video / audio data recording / reproducing device 10 for this additional recording operation is as follows. That is, the controller 120 issues an additional recording command command 92 to the video / audio data recording / reproducing device 10. In the video / audio data recording / reproducing apparatus 10, when the additional recording command command 92 is transferred from the interface circuit 11, the hard disk control circuit 12 starts additional recording of additional data in the AV file 40 which has been repeatedly overwritten. (See FIG. 4B).

Here, the additional recording to the AV file 40 will be described from the hard disk 16 side.
As shown in FIG. 5A, first, the repetitive recording area 41
If the reception of the additional recording command command 92 is confirmed during the overwrite recording, the position at that time is determined as the additional recording command command confirmation position 44. Next, the recording position, that is, the recording head of the hard disk 16 immediately and repeatedly moves to the recording area final position 45, and resumes recording of AV data from the subsequent recording area.
As shown in FIG. 5B, the recording area 42 in which additional recording is performed extends from the repetitive recording area final position 45 to the recording position 50, which is the recording area 41.
And therefore, the repetitive recording area 41
Are stored as prerecorded recording areas.

Finally, when ending the recording operation itself, the controller 120 issues a stop command 96 to the video / audio data recording / reproducing apparatus 10. In the video / audio data recording / reproducing apparatus 10, when the hard disk control circuit 12 receives the stop command 96, the recording operation ends.

Next, the reproducing operation of the video / audio data recording / reproducing apparatus according to the first embodiment will be described with reference to FIG.

FIG. 6 is a diagram showing the sequence of various commands issued from the controller 120 to the video / audio data recording / reproducing apparatus 10 when reproducing AV data based on an AV file.

As shown in the figure, the controller 120
A reproduction operation setting command 94 is issued to the video / audio data recording / reproduction device 10. On the video / audio data recording / reproducing apparatus 10 side, when the hard disk control circuit 12 receives the reproducing operation setting command 94, the reproducing operation mode specified by the parameter 2 is changed to the specified AV file (the AV file 40 in this case). Set.

Next, the controller 120 issues a reproduction command 95 to the video / audio data recording / reproducing apparatus 10. On the video / audio data recording / reproducing device 10, when the hard disk control circuit 12 receives the reproduction command 95, the reproduction of the AV file 40 is started.

Here, the reproduction of the AV file 40 is to reproduce the repetitive recording area 41 and the recording area 42 on the hard disk 16 as shown in FIG. In FIG. 4B, AV data is not always recorded in chronological order because overwrite recording is repeatedly performed.
Since the file 40 is set so as to reproduce the AV data from those recorded in the past along the time axis, the AV data is reproduced as in a normal reproduction operation.

Finally, when ending the reproducing operation itself,
The controller 120 controls the video / audio data recording / reproducing device 1
A stop command 96 is issued to 0. In the video / audio data recording / reproducing apparatus 10, when the hard disk control circuit 12 receives the stop command 96, the reproducing operation ends.

The controller 120 issues a reproduction command 95 to an area that has not been overwritten on the AV file, ie, an area on the hard disk 16 where no AV data has been recorded on the repeated recording area 41 or the recording area 42. Is issued, the video / audio data recording / reproducing apparatus 10 follows the reproduction operation mode of the parameter 2 set by the reproduction operation setting command 94, and when the alternative data reproduction mode is set, predetermined image data (for example, a blue-back image) Is reproduced, and in the stop mode, the reproduction operation itself is stopped. (Embodiment 2) Next, a video / audio data recording / reproducing apparatus according to Embodiment 2 of the present invention will be described. The configuration of the video / audio data recording / reproducing device 10 according to the second embodiment is the same as that of the first embodiment, and the controller 120
In this case, an AV file different from that of the first embodiment is created by a control command issued from the first embodiment, and the operation is performed.

FIGS. 10A to 10C are diagrams showing the format of each control command received by the video / audio data recording / reproducing apparatus 10 according to the second embodiment of the present invention and executing the instructions described therein. It is. Hereinafter, each control command and the operation executed by each control command will be described with reference to the drawings.

First, FIG. 10A shows a maximum size setting command 97/98 for setting the maximum size in an AV file. The maximum size setting command 97/98 has an AV file specification parameter as the parameter 1 and a maximum size specification parameter as the parameter 2.

When receiving the maximum size setting command 97/98, the hard disk control circuit 12 stores the maximum size specified by the parameter 2 as management information of the specified AV file. If the maximum size specification is invalidated, the maximum size is canceled.

FIG. 10B shows a recording operation setting command 91, and FIG. 10C shows an additional recording instruction command, all of which have the same functions as in the first embodiment.

Further, in the video / audio data recording / reproducing apparatus 10 of the second embodiment, a reproduction command 95 shown in FIG. 9F and a stop command 96 shown in FIG. 9G are also used.

The operation of the video / audio data recording / reproducing apparatus 10 according to the second embodiment of the present invention having the above configuration will be described below.

First, the video / audio data recording / reproducing apparatus 1
The pre-recording operation using 0 will be described with reference to FIGS. FIG. 7 is a diagram showing a sequence of each control command from the controller 120 to the video / audio data recording / reproducing device 10 when performing a pre-recording operation. FIG. 8 is a diagram showing the relationship between the AV data arrangement on the hard disk 16 and the data arrangement of the AV file when performing the pre-recording operation in the second embodiment.

The relationship between the data arrangement on the hard disk 16 and the AV data arrangement shown in FIG. 7 is stored and managed by the hard disk control circuit 12 as an AV file management table, as in the first embodiment. Will be

As shown in FIG. 7, when the maximum size setting command 97 is issued from the controller 120, the video / audio data recording / reproducing apparatus 10
1 receives the maximum size setting command 97 and transfers it to the hard disk circuit 12. Hard disk control circuit 12
Sets the maximum size 80 specified by the parameter 2 to the specified AV file 81.

At this time, as shown in FIG.
The file 81 is set as a repetitive recording area 41 on the hard disk 16. However, Embodiment 1
Unlike the repetitive recording target 41, the repetitive recording area start position 43 is determined, but the recording position corresponding to the repetitive recording area end position 45 is not set, and the size of the repetitive recording area 41 is set at the setting stage. Is defined as a variable. On the other hand, the potential repetitive recording area set by the maximum size 80 is the repetitive recording area head position 4
3 and the maximum limit address 83.

Next, the controller 120 issues a recording operation setting command 91. When the video / audio data recording / reproducing apparatus 10 receives the recording operation setting command 91, the hard disk control circuit 12 sets the operation mode designated by the parameter 2 for recording, here the overwrite mode, in the AV file 81.

Further, the controller 120 issues an additional recording command 92. When the video / audio data recording / reproducing apparatus 10 receives the additional recording command 92, the hard disk control circuit 12 starts additional recording on the AV file 81 specified by the parameter 1.

The operation of additional recording on the AV file 81 is performed on the hard disk 16 from the start point of the repetitive recording area 41 as shown in FIG.
This is realized as recording of V data.

As the data recording amount increases due to the recording operation by the above-mentioned additional recording command 92, the size of the AV file 81 increases, and the repetitive recording area 41 on the hard disk 16 also increases. And AV
The size of the file 81 is the maximum size setting command 97
When the hard disk control circuit 12 reaches the maximum size 80 set by the above, the hard disk control circuit 12 overwrites the data with the oldest recording time in the AV file according to the set overwrite mode, which is the set recording operation mode, and repeats The overwrite recording mode is set.

As shown in FIG. 8B, on the hard disk 16, the repeated overwrite recording on the AV file 81 is performed in the section from the repetitive recording area start position 43 to the maximum limit address 83, which is the repetitive recording area 41. , AV data recording. AV
When data recording is performed up to the maximum limit address 83, the recording position is repeatedly returned to the recording start position 43 again.
This means that recording is performed by repeatedly overwriting the recording area 41 repeatedly.

Next, when performing normal recording according to the user's intention, the above-described repetitive overwrite mode is terminated, and a normal recording operation is performed. The operation of the video / audio data recording / reproducing device 10 for this normal recording operation is as follows. That is, the controller 120 issues the maximum size setting command 98 to the video / audio data recording / reproducing device 10.

The maximum size setting command 98 differs from the previously received maximum size setting command 97 in that the maximum size designation parameter of parameter 2 is different, and has a content that makes the maximum size 80 invalid. Therefore, the maximum size setting command 98 which is a new maximum size setting command
, The management table of the AV file 81 is reset, the maximum size 80 is released, and the size limitation of the recording area is removed.

The position at the time when the reception of the maximum size setting command 98 is confirmed on the management table 81 is determined as a maximum size setting command confirmation position 82. As a starting point, a normal recording operation is started (see FIG. 8A).

Here, the normal recording in the management table 81 will be described from the hard disk 16 side. As shown in FIG. 8B, first, the maximum size setting is performed while the repetitive recording area 41 is overwritten and recorded. Assuming that the reception of the command 98 is confirmed, the position at that time is
Determined as the maximum size setting command confirmation position 82,
The recording head of the hard disk 16 immediately moves to the maximum limit address 83, and executes recording of AV data in a recording area subsequent thereto.

As shown in the figure, the recording area 42 in which ordinary recording is performed extends from the maximum limit address 83 to the recording position 50, and the repetitive recording area 41 is a repetitive recording area. It is between the head position 43 and the maximum limit address 83. Therefore, the repetitive recording area 41 and the recording area 42 are divided by the maximum limit address 83, and the repetitive recording area 41 is held as a pre-recorded recording area.

Finally, when ending the normal recording operation,
The controller 120 is a video / audio data recording / reproducing device 10
A stop command 96 is issued. In the video / audio data recording / reproducing apparatus 10, when the hard disk control circuit 12 receives the stop command 96, the recording operation ends.

Although the present embodiment has been described as a video / audio data recording / reproducing apparatus in which a video / audio data recording apparatus and a video / audio data recording / reproducing apparatus are integrated, they may be independent of each other. .

Further, in the present embodiment, data including video and audio are handled as AV data. However, this may naturally be data for only video or audio only.

Further, in the present embodiment, description has been made assuming that there is a pre-recording operation for repeatedly performing overwrite recording and a normal recording for performing one-time recording. May be used as a repetitive recording area for performing the above operation. In this case,
Endless recording is possible and can be used, for example, for security cameras.

In the present embodiment, the operations of the interface circuit 11 and the hard disk control circuit 12 are realized by hardware. However, this is realized by software by a program using a computer. May be.

Further, in the present embodiment, the operations of the interface circuit 11 and the hard disk control circuit 12 may be realized in the form of being recorded on a program recording medium as a program using a computer.

[0096]

As described above, according to the video / audio data recording / reproducing apparatus of the present invention, a control command set for generating an AV file is required to connect and operate another digital AV apparatus via a bus. By using the recording area, a predetermined area which can be arbitrarily set by the user is provided on the recording area, the recording operation can be controlled, and overwrite recording such as pre-recording can be continuously performed.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a video / audio data recording / reproducing apparatus of the present invention.

FIG. 2 is a diagram showing how the video / audio data recording / reproducing apparatus of the present invention forms a system with other devices.

FIG. 3 is a diagram showing a sequence of each control command from the controller 120 to the video / audio data recording / reproducing apparatus 10 when performing a pre-recording operation in the video / audio data recording / reproducing apparatus according to the first embodiment of the present invention. .

FIG. 4 is a diagram showing a relationship between a hard disk 16 and an AV file when performing a pre-recording operation in the video / audio data recording / reproducing apparatus according to the first embodiment of the present invention.

FIG. 5 shows a video / audio data recording / reproducing apparatus according to Embodiment 1 of the present invention.
FIG. 7 is a diagram showing the arrangement of AV data in two states, that is, a state of overwrite recording which is pre-recording and a state of additional recording which is normal recording.

FIG. 6 shows the sequence of various commands issued from the controller 120 to the video / audio data recording / reproducing apparatus 10 when reproducing the AV data based on the management table in the video / audio data recording / reproducing apparatus according to the first embodiment of the present invention. FIG.

FIG. 7 is a diagram showing a sequence of each control command from the controller 120 to the video / audio data recording / reproducing apparatus 10 when performing a pre-recording operation in the video / audio data recording / reproducing apparatus according to the second embodiment of the present invention. .

FIG. 8 is a diagram showing a relationship between a hard disk 16 and an AV file when performing a pre-recording operation in the video / audio data recording / reproducing apparatus according to the second embodiment of the present invention.

FIGS. 9A to 9F are diagrams showing formats of control commands received by the video / audio data recording / reproducing apparatus 10 according to the first embodiment of the present invention and executing commands described therein.

FIGS. 10A to 10C are diagrams showing formats of respective control commands received by the video / audio data recording / reproducing apparatus 10 according to the second embodiment of the present invention and executing the commands described therein.

FIG. 11 is a diagram showing a configuration of a video / audio data recording / reproducing apparatus 100 according to a conventional technique.

FIG. 12 is a diagram showing a state in which a video / audio data recording / reproducing apparatus according to a conventional technique forms a system with other devices.

FIG. 13 is a diagram showing a sequence of each control command from the controller 120 to the video / audio data recording / reproducing apparatus 100 when performing a pre-recording operation in the video / audio data recording / reproducing apparatus 100 according to the related art.

[Explanation of symbols]

 10, 100, 110 Video / audio data recording / reproducing device 11 Interface circuit 12 Hard disk control circuit 13, 102 Actuator drive circuit 14, 103 Buffer RAM 15, 104 Read / write signal processing circuit 16, 105 Hard disk 40, 81 AV file 41 Repetitive recording Area 42 Recording area 43 Repeat recording area start position 44 Additional recording instruction command confirmation position 45 Repeat recording area end position 50 Recording position 80 Maximum size 82 Maximum size setting command confirmation position 83 Maximum limit address 90, AV file generation command 91 Recording operation setting Command 92 Additional recording command command 93 AV file overwrite recording command 94 Playback operation setting command 95 Playback instruction command 96, 150 Stop command 97, 98 Maximum It is setting command 101 control circuit 120 controller 121 digital monitor 122 VTR 123 tuner 130 search command 140 recording command

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5B065 BA01 CC03 5C053 FA21 FA23 GA20 GB01 GB11 HA29 KA01 KA05 KA19 KA24 LA06 LA07 LA11 LA15 5D044 AB05 AB07 BC01 CC04 DE03 DE48 GK12 HH07

Claims (17)

[Claims] 1. A recording medium for recording video and / or audio data, recording area recording means for recording video and / or audio data in a recording area in the recording medium, and connected via a bus. Receiving means for receiving a control command from a device that has received the command, and AV (Audio Visual) by the command receiving means.
When a command for generating a file is received, an AV file including correspondence information between a recording area of the recording medium and an AV file is received.
An audio / video data recording device comprising: a file management table, and an AV file management means for generating an AV file of a predetermined size, wherein the recording area recording means performs the recording based on the AV file management table. A video and audio data recording device for recording video and / or audio data in an area. 2. The recording area recording means records video and / or audio data by repeatedly overwriting a recording area corresponding to the AV file based on the AV file management table. The video / audio data recording device according to claim 1. 3. The command receiving means receives an additional recording command command for performing an additional recording operation on the AV file, and the recording area recording means, upon receiving the additional recording command command, repeats the repetition. 3. The video and audio data recording apparatus according to claim 2, wherein the recording of the video and / or audio data is performed in a recording area different from the overwriting recording area. 4. A recording medium for recording video and / or audio data, recording area recording means for recording video and / or audio data in a recording area in the recording medium, and connected via a bus. Command receiving means for receiving a control command from a device, and an AV file for setting the maximum size in an AV file management table when a maximum size setting command for defining a maximum size of an AV file is received by the command receiving means. A video and audio data recording device comprising a maximum size setting means, wherein the recording area recording means records video and / or audio data in the recording area based on the AV file management table. Characteristic video and audio data recording device. 5. The recording area recording means records video and / or audio data by repeatedly overwriting a recording area corresponding to the AV file based on the maximum size of the AV file in the AV file management table. The video / audio data recording apparatus according to claim 4, wherein the recording is performed. 6. The AV file maximum size setting means resets the maximum size in the AV file management table when a new maximum size setting command is received by the command receiving means during a recording operation. The recording area recording means, according to claim 5, wherein the operation is switched based on the reset AV file management table to record video and / or audio data in the recording area. The video and audio data recording device according to the above. 7. A recording medium for recording video and / or audio data, AV file management means for managing an AV file management table including correspondence information between a recording area of the recording medium and an AV file, and via a bus. Command receiving means for receiving a control command from a connected device, and receiving the control command, and transmitting the video and / or audio data recorded in the video / audio data recording device according to any one of claims 1 to 6. A video / audio data reproducing apparatus comprising: a reproducing unit that reproduces an audio / video data. The command receiving unit receives a reproduction command command for performing a reproducing operation on data of an AV file. Receiving the playback command, the video and / or video from the recording area based on the AV file management table. Video and audio data reproducing apparatus, characterized in that for reproducing voice data. 8. When the recording area includes a non-recording area in which video and / or audio data is not recorded in the recording area, an amount of substitute data corresponding to the data of the recording area is provided. The video / audio data reproducing apparatus according to claim 7, wherein 9. The reproduction means, when the recording area has a non-recording area which is an area where no video and / or audio data is recorded, reproduces the video and / or audio data from the recording area. The video / audio data reproducing apparatus according to claim 7, wherein the video / audio data reproducing apparatus is stopped. 10. The data reproducing apparatus according to claim 7, wherein the reproducing unit reproduces the data recorded in the recording area in the order from the oldest recording order.
The video / audio data reproducing device according to any one of the above. 11. A video obtained by combining the video / audio data recording device according to any one of claims 1 to 6 with the video / audio data reproduction device according to any one of claims 7 to 10. Audio data recording and playback device. 12. A recording medium for recording video and / or audio data, recording area recording means for recording video and / or audio data in a recording area in the recording medium, and connected via a bus. Receiving means for receiving a control command from a device that has received the command, and AV (Audio Visual) by the command receiving means.
When a command for generating a file is received, an AV file including correspondence information between a recording area of the recording medium and an AV file is received.
A video / audio data recording method using an AV file management means for setting a file management table and generating an AV file of a predetermined size, wherein the recording area recording means uses the AV file management table based on the AV file management table. The video and / or
Alternatively, a video / audio data recording method including a step of recording audio data. 13. A recording medium for recording video and / or audio data, AV file management means for managing an AV file management table including correspondence information between recording areas of the recording medium and AV files, and a bus. A command receiving means for receiving a control command from a connected device, and a reproducing means for receiving the control command and reproducing video and / or audio data recorded by the video / audio data recording method according to claim 12. A method for reproducing a video / audio data using the command receiving means, wherein the command receiving means is used to receive a reproduction command command for performing a reproduction operation on data of an AV file; and Upon receiving a playback command command, a video and / or a video is read from the recording area based on the AV file management table. Video and audio data reproducing method characterized by comprising the step of reproducing the audio data. 14. A program for recording a program for causing a computer to execute all or a part of the functions of each means or each part of the video / audio data recording apparatus according to any one of claims 1 to 6. recoding media. 15. A program recording a program for causing a computer to execute all or a part of the function of each means or each part of the video / audio data reproducing apparatus according to claim 7. recoding media. 16. A program recording medium on which a program for causing a computer to execute all or a part of the operations of the video / audio data recording method according to claim 12 is recorded. 17. A program recording medium on which a program for causing a computer to execute all or a part of the operations of the video / audio data reproducing method according to claim 13 is recorded.