WO2002037490A1

WO2002037490A1 - Av stream recording/reproducing device, av stream recording device, av stream recording/reproducing method, av stream recording method

Info

Publication number: WO2002037490A1
Application number: PCT/JP2001/009467
Authority: WO
Inventors: Kazuhiro Mihara; Shinichirou Takigawa; Yoshiki Kuno; Junichi Komeno; Toshikazu Koudo
Original assignee: Matsushita Electric Industrial Co., Ltd.
Priority date: 2000-10-30
Filing date: 2001-10-29
Publication date: 2002-05-10
Also published as: TWI227016B

Abstract

A conventional AV stream recording/reproducing method poses a problem of interrupting an AV stream read or written between a buffer and a disk unit. An AV stream recording/reproducing device comprising an HDD controller (120) and a disk unit (110) for performing a plurality of types of AV stream reading/reproducing operations, a memory means (140) having at least AV stream-use reproducing buffer (142) and recording buffer (141), an AV recording/reproducing HDD controller (130) for monitoring the memory means (140) and requesting a specified type of operation to be performed by the disk unit (110), and a scheduler-carrying QUE (150) for selecting a specified operation out of the request queues based on a specified reference to determine the next operation to be performed by the disk unit (110), the specified reference being a priority order determined according to a type of recording/reproducing operation.

Description

Specification

AV stream recording / reproducing device, AV stream recording device, AV stream recording / reproducing method, AV stream recording method

The present invention relates to an AV stream recording / reproducing apparatus for recording and reproducing an AV stream composed of digital video and audio, an AV stream recording apparatus, an AV stream recording / reproducing method, an AV stream recording method, and the like. Background art

FIG. 12 is a diagram schematically showing a configuration of an AV stream recording / reproducing apparatus for recording / reproducing an AV stream according to a conventional technique. As shown in the figure, in the AV stream recording / reproducing apparatus 1200, the disk device 1200 is a means for storing an AV stream and system information related to the AV stream realized by an HDD, and an HDD controller. 1220 is a means for driving the disk device 1 210, an HDD controller for AV recording and reproduction 1 230 is a means for reading and writing the AV stream and system information to the disk device 1 210, a memory means 1 240 is a means for temporarily storing an AV stream written from the outside to the disk drive, an AV stream read out from the disk drive 121 to the outside, and system information.QUE 1 250 is a write command issued from the memory means. This is a means for receiving a read request or a read request and outputting the request to the HDD controller 1220.

In the memory means 1240, the system information buffer 1 24 1 Is a means for temporarily recording system information, an REC buffer 1242 is a means for temporarily recording an AV stream written from the outside to the disk device 1210, and a PLAY buffer 1 243 is an AV stream read from the disk device 1210 to the outside. This is a means for temporarily recording

In addition, the RE C buffer 1242 and the P LAY buffer 1 243 are internally

1243 a, b.

The operation of the conventional AV stream recording / reproducing apparatus having the above configuration will be described below.

First, a case where a recording (REC) operation is performed from the outside to the AV stream recording / reproducing apparatus 1200 will be described.

When the AV stream input from the outside is input to the memory means 1240, it is once stored in the REC buffer 1242a. When the capacity of the REC buffer 1242a becomes full, the storage destination of the external AV stream is switched to the rec buffer 1242b, and the storage of the AV stream is continued.

On the other hand, the HDD controller for AV recording and playback uses the REC buffer.

When it is detected that 2a has become short, the HDD controller 122 is requested to record the REC buffer 1242a in the disk device 1210. '

The request issued to the HDD controller 1220 is stored in the QUE 1250, and is output to the HDD controller 1220. The HDD controller 1220 records the designated area of the memory on the disk device 1210 in the order in which the requests accumulated in the QUE 1250 are issued.

On the other hand, the AV stream written from the outside When the storage in the REC buffer 1242b becomes short and the storage in the REC buffer 1242b becomes short, the data in the REC buffer 1242b is recorded on the disk device 1210 in the same procedure as in the case of the REC buffer 1242a.

In the above operation, the temporary recording of the externally written AV stream in the memory means 1240 is performed by the REC buffer 1242a, the REC buffer 1242b, the REC buffer 1242a, the REC buffer 1242b,. Is performed by using each REC buffer alternately.

Next, a case will be described in which the AV stream recording / reproducing apparatus 1200 performs an AV stream reproducing operation (PLAY) to the outside.

At the start of the play, the HDD controller for AV recording and reproduction 1230 issues a read request to the HDD controller 1220. The read request 一旦 is temporarily stored in QUE 1.250.

Output to 220. The HDD controller reads the AV stream data from the disk device 1210 in the order in which the requests stored in the QUE 1 250 are issued, and sends the data via the AV controller 1230 to the PLAY Store the data in buffer 1243a. When data accumulation continues in the PLAY buffer 1 243a and the PLAY buffer 1243a becomes short, the PLAY buffer 124

3 The AV stream data temporarily recorded in a is output to the outside as a “playback AV stream” in order from the beginning of the buffer, while the data from the disk device 1210 is stored in the PLAY buffer 1243 b. . Next, the HDD controller for AV recording / reproduction 1230 sends out the data in the PLAY buffer 1243b after all the data in the PLAY buffer 1243a is sent out. At this time, the AV recording / reproducing HDD controller 1230 detects that the PLAY buffer 1243a has become empty, and issues a read request to the QUE 1250. QUE 1 Upon receiving the read request, the 250 outputs this to the HDD controller 1220, and the HDD controller 1220 reads the data from the disk device 1210 and stores it in the PLAY buffer 1243a.

After the PLAY buffer 1243b, which had been transmitting the AV stream data to the outside, became empty, the data in the PLAY buffer 1243a is continuously transmitted, and the reproduction operation is continued.

Next, a description will be given of an operation of saving system information, which is performed separately from the above-described recording / playback operation of the AV stream.

The system information indicates a recording position of an object on a medium of the disk device 1210 and attribute information of an object (for example, a recorded program name and a recording time).

In order to record the system information on the disk medium in the disk device 1210, the system information is recorded on the medium after the end of the recording / reproducing operation of the AV stream.

As a result, it is possible to manage the AV stream recorded on the disk device 1210 as an AV file that is an object.

By the way, in this method, if the length of the AV stream to be recorded becomes long, it is necessary to compose the system information by following the information at the start of recording at the end of recording. There was such a problem.

To solve this problem, there is a technology that periodically records system information on the HDD during recording and playback of AV streams. According to this, when the recording of the AV stream ends, the system information at the time of the end of the recording can be obtained by referring to the system information at the time immediately before the end thereof, so that the recording of the system information can be shortened.

The AV stream recording / reproducing device according to the conventional technology is as described above. There were, however, the following issues.

First, the following issues were encountered during AV stream REC operation. In the REC operation as described above, while the data in the REC buffer 1242a is written to the disk device, while the data from the outside is written to the REC buffer 1242b, the REC buffer 1242b is to reach a pie, data of RE C buffer 1242 a, when the _c you need data recorded to the disk device 1210 is completed, before RE C buffer 1242 b overflows, R EC buffer 1242 a內If the recording of the data in the disk device 1210 is completed, the storage destination of the AV stream can be switched to the REC buffer 1242a again, and the recording operation of the AV stream can be continued.

However, if the data in the REC buffer 1242a is not completely recorded on the disk device 1210 by the time the REC buffer 1242b overflows, and the AV stream overflows, the AV recorded on the disk device 1210 will not be completed. This will result in missing streams.

Next, the following issues were encountered during AV stream PLAY operation. In the PLAY operation as described above, while the data in the PLAY buffer 1 243b is being read to the outside, while the data from the disk device 1210 is being written to the PLAY buffer .1243a, Before the PLAY buffer 1243b becomes empty, the re-accumulation in the PLAY buffer 1243a must be completed.

At this time, if the re-accumulation of data in the P, LAY buffer 1243a is not completed before the PLAY buffer 1243b becomes empty, the PLAY buffer 1243a is output after the data of the PLAY buffer 1243b is transmitted. Will not be transmitted immediately, and the transmission of the AV stream in the PLAY operation will be interrupted. There were the following problems when recording system information. As mentioned earlier, conventionally, system information has to be recorded on a disk drive.

After the recording / playback operation of the AV stream was completed, the system information was recorded on the media.

If a power failure occurs during recording of system information due to a power failure, disconnection of outlet, etc., the system information will not be recorded, and the AV stream is partially recorded in the disk device 1 210 Despite this, the AV stream recording / reproducing device 1200 cannot manage the AV stream.

As a method of avoiding the above problems, to prevent interruption during recording and playback of the AV stream, the capacity of the REC buffer 12.42 and the PLAY buffer 1243 in the memory means 124 Each of them requires a lot, but it has made the memory means 1,240 expensive.

Further, as shown in FIG. 13, if system information is recorded periodically at a predetermined timing during recording of an AV stream, the corresponding system information exists at timing 130a ′. There is system information corresponding to the timing 1300b and system information corresponding to the timing 1300c.

However, if a power failure 1340 occurs at any time T2 between timing 1300c and timing 1300d at which the next system information recording is to be performed, the actual disk The system information is stored in the AV file C1330, even though the data recorded in the AV stream on the device 1210 is recorded in the range of time T1 to T2. Data is not supported, so there is inconsistency between the actually recorded AV stream and the AV file, that is, the system information. The AV stream processing has become impossible. Disclosure of the invention

The present invention has been made in view of the above problems, and has an AV stream recording / reproducing apparatus capable of reducing an influence on data during recording or reproduction due to interruption of an AV stream generated during recording / reproduction. The purpose is to obtain. Another object of the present invention is to obtain an AV stream recording device or the like that can record an AV stream without causing an inconsistency irrespective of an interruption during operation.

In order to achieve the above object, a first aspect of the present invention (corresponding to claim 1) comprises a recording / reproducing means for performing a plurality of types of recording / reproducing operations on an AV stream, at least a reproduction buffer for the AV stream, and Memory means having a buffer for

Request generation means for monitoring the memory means and requesting a predetermined type of operation to be executed by the recording / reproduction means;

An operation determining unit that selects a specific operation from a queue of the requests based on a predetermined criterion, and determines an operation to be performed next by the recording / reproducing unit. This is an AV stream recording / reproducing device having a priority determined according to the type of the AV stream.

Also, in the second invention (corresponding to claim 2), the priority order is determined according to a data recording speed to the recording buffer or a reproduction speed of data reproduced from the reproduction buffer. FIG. 4 is an AV stream recording / reproducing apparatus according to a first aspect of the present invention. A third aspect of the present invention (corresponding to claim 3) is a recording / reproducing means for performing a plurality of types of recording / reproducing operations on an AV stream,

A memory means having at least a playback buffer and a recording buffer for an AV stream;

By monitoring whether the amount of data read from the recording buffer or the amount of data written to the reproducing buffer reaches a predetermined threshold, a predetermined type of operation request executed by the recording / reproducing means is monitored. Request generation means;

An operation determining unit that selects a specific operation from a queue of the request based on a predetermined criterion, and determines an operation to be performed next by the recording / reproducing unit. An AV stream recording / reproducing apparatus for determining whether or not the data capacity has reached a predetermined threshold value monitored by the request generation means. -Further, according to a fourth aspect of the present invention (corresponding to claim 4), the predetermined threshold value is determined according to a data writing speed to the recording buffer or a reproduction speed of data reproduced from the reproduction buffer. This is a third modified AV stream recording / reproducing apparatus of the present invention.

In a fifth aspect of the present invention (corresponding to claim 5), there are a plurality of the recording buffers and a plurality of Z or the reproduction buffers,

The read operation from the recording buffer and / or the write operation to the reproduction buffer are performed in parallel according to the number of the recording buffer or the reproduction buffer,

The AV stream recording / reproducing apparatus according to a third aspect of the present invention, wherein the predetermined threshold value decreases as the number of the recording buffer or the reproduction buffer increases. '

A sixth aspect of the present invention (corresponding to claim 6) relates to an AV stream. Recording and reproducing means for performing a plurality of types of recording and reproducing operations;

Memory means having at least a playback buffer and a recording buffer for the AV stream;

By monitoring whether the writing speed of the AV stream transmitted from the recording buffer or the reproduction speed of the data in the reproduction buffer reaches a predetermined threshold value, a predetermined type of recording and reproduction performed by the recording and reproduction means is performed. A request generating means for performing an operation request;

An operation determining unit that selects a specific operation from the request queue based on a predetermined criterion, and determines an operation to be performed next by the recording / reproducing unit, wherein the predetermined criterion is the writing speed or An AV stream recording / reproducing apparatus for determining whether or not a reproducing speed has reached a predetermined threshold value monitored by the request generating means.

In a seventh aspect of the present invention (corresponding to claim 7), the plurality of types of recording / reproducing operations are: reading an AV stream from the recording buffer; writing an AV stream to the reproducing buffer; writing for special reproduction of the AV stream to the use buffer, first with at least a first 3 or the 6 _c also is any AV stream recording and reproducing apparatus of the present invention, the present invention of the eighth ( The memory means further includes a system information buffer for reading or writing system information related to the AV stream,

The plurality of types of recording / reproducing operations are the AV stream recording / reproducing according to any one of the first, third, sixth, and seventh aspects of the present invention, including reading or writing of the system information in the system information buffer. a device _c Further, the present invention of the ninth (corresponding to claim 9), the priority, the between multiple several recording operation, first or are determined based on the relative importance A seventh embodiment is an AV stream recording / reproducing apparatus of the present invention. In a tenth aspect of the present invention (corresponding to claim 10), the priority order is such that reading of an AV stream from at least the recording buffer is performed with the highest priority. This is an AV stream recording / playback apparatus of the present invention.

Also, the eleventh invention (corresponding to claim 11) is to continuously record an AV stream and to store system information for processing the AV stream having a predetermined data amount as an object. Recording means for non-continuously recording during the recording of the AV stream so as to correspond to the previously recorded AV stream;

And a matching means for matching the previous system information held in the recording means with the AV stream recorded in the recording means,

The matching means, when the recording operation of the recording means is aborted, an AV stream recording for associating the system information held in the recording means with the AV stream of the content of the system information as the object. Device. '

Further, a twelfth aspect of the present invention (corresponding to claim 12) is to continuously record an AV stream and to store system information for processing the AV stream having a predetermined data amount as an object. Recording means for non-continuously recording during the recording of the AV stream so as to correspond to the previously recorded AV stream;

A matching unit for matching the system information with the AV stream recorded in the recording unit,

When the recording operation of the recording unit is aborted, the matching unit detects the end of recording of the AV stream by referring to the AV stream and the system information recorded in the recording unit until then. End of the record An AV stream recording apparatus for associating an AV stream up to an end with the contents of the system information as the object. '

According to a thirteenth aspect of the present invention (corresponding to claim 13), the AV stream has an identifier for maintaining continuity of the contents of the AV stream, and the matching unit refers to the identifier. Then, there is provided an AV stream recording apparatus according to a twelfth aspect of the present invention for judging the continuity of the contents of the AV stream. Also, a fourteenth invention (corresponding to claim 14) is that the AV stream has time information for maintaining the continuity of the AV dream,

The AV stream recording apparatus according to a twelfth aspect of the present invention, wherein the matching unit refers to the time information to determine continuity of the AV stream.

According to a fifteenth aspect of the present invention (corresponding to claim 15), the matching means can perform the processing when the recording means resumes recording of the abortion data after the abortion. An AV stream recording apparatus according to the eleventh or eleventh aspect of the present invention, wherein the content of the object information is rewritten to update the content of the object so as to include the data after the abortion. is there.

A sixteenth aspect of the present invention (corresponding to claim 16) includes a recording / reproducing step of performing a plurality of types of recording / reproducing operations relating to an AV stream;

A memory step of temporarily recording the AV stream using at least a playback buffer and a recording buffer for an AV stream;

A request generation step of monitoring the memory step and requesting a predetermined type of operation request executed by the recording / reproduction step;

An operation determining step of selecting a specific operation from the request queue based on a predetermined criterion, and determining an operation to be performed next by the recording / reproducing means. Priorities determined according to the type of operation This is the AV stream recording / reproducing method that is ranked.

A seventeenth aspect of the present invention (corresponding to claim 17) includes a recording / reproducing step of performing a plurality of types of recording / reproducing operations relating to an AV stream;

A memory step of temporarily recording the AV stream using at least a playback buffer and a recording buffer for the AV stream;

It is monitored whether the amount of data read from the recording buffer or the amount of data written to the reproduction buffer reaches a predetermined threshold value, and a predetermined type of operation request executed by the 'recording / reproduction process is performed. A request generation step;

An operation determining step of selecting a specific operation from a queue of the requests based on a predetermined criterion, and determining an operation to be performed next in the recording / reproducing step, wherein the predetermined criterion is data in the memory step. An AV stream recording / reproducing method for determining whether or not the capacity of the AV stream has reached a predetermined threshold value monitored by the request generation step. .

Also, an eighteenth aspect of the present invention (corresponding to claim 18) includes a recording / reproducing step of performing a plurality of types of recording / reproducing operations relating to an AV stream,

A memory step of temporarily recording the AV stream using at least an AV stream playback buffer and a recording buffer;

By monitoring whether a reading speed of data from the recording buffer or a writing speed of data to the reproduction buffer reaches a predetermined threshold value, a predetermined type of operation request executed by the recording / reproduction process is monitored. Request generation process,

An operation determining step of selecting a specific operation based on a predetermined criterion from the request queue and determining an operation to be performed next in the recording / reproducing step. The predetermined criterion is an AV stream recording / reproducing method that determines whether the read speed or the write speed has reached a predetermined threshold value monitored by the request generation unit.

A nineteenth aspect of the present invention (corresponding to claim 19) is to continuously record an AV stream and to store system information for processing the AV stream having a predetermined data amount as an object. A recording step of recording non-continuously during recording of the AV stream so as to correspond to the previously recorded AV stream;

A matching step for matching the system information held in the recording step with the AV stream recorded in the recording step,

When the recording operation of the recording step is aborted, the matching step is an AV stream that associates the system information held in the recording step with the AV stream of the system information as the object. This is a trim recording method.

A twenty-second aspect of the present invention (corresponding to claim 20) is that, while continuously recording an AV stream, system information for processing the AV stream having a predetermined data amount as an object is provided by: During the recording of the AV stream, a recording step of recording non-continuously so as to correspond to the AV stream recorded up to that time; the system information; and the AV stream recorded in the recording step And a matching process for ensuring consistency with

In the matching step, when the recording operation of the recording step is aborted, the end of recording of the AV stream is detected by referring to the AV stream and the system information recorded by the recording step until then. Then, the AV stream up to the recording end and the contents of the system information are AV stream recording method used as an object This is an AV stream recording method.

Further, a twenty-first aspect of the present invention (corresponding to claim 21) is a recording / reproducing means for performing a plurality of types of recording / reproducing operations on the AV stream in the AV stream recording / reproducing apparatus of the first aspect of the present invention, A memory means having at least a playback buffer for an AV stream and a recording buffer;

A request generation unit for monitoring the memory unit and issuing a predetermined type of operation request to be executed by the recording / reproduction unit; and selecting a specific operation from a queue of the request based on a predetermined criterion. This is a program for causing a computer to function as all or a part of the operation determining means for determining the operation to be performed next by the reproducing means.

Also, a twenty-second invention (corresponding to claim 22) is a recording / reproducing means for performing a plurality of types of recording / reproducing operations on an AV stream of the AV stream recording / reproducing apparatus of the third invention, A memory means having a stream playback buffer and a recording buffer, and a capacity of data read from the recording buffer or a capacity of data written in the playback buffer is set to a predetermined threshold value. A request generating means for making a predetermined type of operation request to be executed by the recording / reproducing means by monitoring whether or not the specified operation is reached; and selecting a specific operation from a queue of the request based on a predetermined criterion. This is a program for causing a computer to function as all or part of the operation determining means for determining the operation to be performed next by the recording / reproducing means.

Further, a twenty-third aspect of the present invention (corresponding to claim 23) is a recording / reproducing means for performing a plurality of types of recording / reproducing operations relating to the AV stream of the AV stream recording / reproducing apparatus of the sixth aspect of the present invention, A memory means having at least a playback buffer for an AV stream and a recording buffer; and a reading speed of data from the recording buffer, or data to the playback buffer. A request generating unit for performing a predetermined type of operation request executed by the recording / reproducing unit by monitoring whether a writing speed of the request reaches a predetermined threshold; and a predetermined reference from a queue of the request. A program for causing a computer to function as a whole or a part of an operation determining means for selecting a specific operation based on the selected operation and determining an operation to be performed next by the recording / reproducing means.

According to a twenty-fourth aspect of the present invention (corresponding to claim 24), the AV stream recording apparatus of the eleventh aspect of the present invention continuously records an AV stream, and stores the AV stream having a predetermined data amount. Recording means for non-continuously recording system information for processing an audio stream as an object during recording of the AV stream so as to correspond to the previously recorded AV stream; and A program for causing a computer to function as all or a part of matching system information and matching means for matching the AV stream recorded in the recording unit.

A twenty-fifth aspect of the present invention (corresponding to claim 25) is that the AV stream recording apparatus of the twelfth aspect of the present invention continuously records an AV stream and has a predetermined data amount. Recording means for non-continuously recording system information for processing an AV stream as an object during recording of the AV stream so as to correspond to the previously recorded AV stream;

A program for causing a computer to function as all or a part of matching means for matching the system information with the AV stream recorded in the recording means.

Further, a twenty-sixth aspect of the present invention (corresponding to claim 26) is a recording / reproducing means for the AV stream recording / reproducing apparatus of the first aspect of the present invention, which performs a plurality of types of recording / reproducing operations on an AV stream, At least the playback stream for the AV stream Memory means having a buffer and a recording buffer;

A request generation unit for monitoring the memory unit and issuing a predetermined type of operation request to be executed by the recording and reproduction unit; and selecting a specific operation from a queue of the requests based on a predetermined criterion, A medium carrying a program for causing a computer to function as all or part of an operation determining means for determining an operation to be performed next by the recording / reproducing means, and is a medium that can be processed by the computer.

A twenty-seventh aspect of the present invention (corresponding to claim 27) is a recording / reproducing means for performing a plurality of types of recording / reproducing operations on an AV stream of the AV stream recording / reproducing apparatus of the third aspect of the present invention. A memory unit having a stream playback buffer and a recording buffer, and whether a capacity of data read from the recording buffer or a capacity of data written in the playback buffer reaches a predetermined threshold value; A request generating means for making a predetermined type of operation request to be executed by the recording / reproducing means, and a specific operation being selected from a queue of the request based on a predetermined criterion, and A medium carrying a program for causing a computer to function as all or a part of an operation determining means for determining an operation to be performed next by a reproducing means; It is a medium that can be processed by.

A twenty-eighth aspect of the present invention (corresponding to claim 28) is a recording / reproducing means for performing a plurality of types of recording / reproducing operations on the AV stream by the AV stream recording / reproducing apparatus of the sixth aspect of the present invention. A memory means having at least a playback buffer for AV stream and a recording buffer, and a reading speed of data from the recording buffer or a writing speed of data to the playback buffer is a predetermined threshold value. A request generating unit for performing a predetermined type of operation request to be executed by the recording / reproducing unit, and selecting a specific operation based on a predetermined criterion from the request queue; The above A medium carrying a program for causing a computer to function as all or part of the operation determining means for determining the operation to be performed next by the recording / reproducing means, and which can be processed by the computer.

A twenty-ninth aspect of the present invention (corresponding to claim 29) is the AV stream recording apparatus according to the eleventh aspect of the present invention, wherein an AV stream is continuously recorded and a predetermined data amount of the AV stream is recorded. Recording means for non-continuously recording system information for processing an audio stream as an object during recording of the AV stream so as to correspond to the previously recorded AV stream; and A medium carrying a program for causing a computer to function as all or part of the held system information and the matching unit for matching the AV stream recorded in the recording unit. A medium that can be processed by a computer.

According to a thirty-fourth aspect of the present invention (corresponding to claim 30), the AV stream recording apparatus of the thirteenth aspect of the present invention continuously records an AV stream and stores the AV stream having a predetermined data amount. Recording means for non-continuously recording system information for processing a stream as an object during recording of the AV stream so as to correspond to the previously recorded AV stream;

A medium carrying a program for causing a computer to function as all or part of the system information and matching means for matching the AV stream recorded on the recording means, comprising: Media that can be processed by the -Brief description of drawings

FIG. 1 is a configuration diagram of an AV stream recording / reproducing apparatus according to Embodiment 1 of the present invention. FIG. 2 is a configuration diagram of an AV stream recording / playback apparatus according to Embodiment 2 of the present invention.

FIG. 3 is a diagram for explaining the state of the REC buffer 242 and the PLAY buffer 243 in the memory means 240 in the AV stream recording / reproducing apparatus according to the second embodiment of the present invention. .

FIG. 4 is a flowchart for explaining the operation of the AV stream recording / reproducing apparatus according to Embodiment 2 of the present invention.

FIG. 5 is a configuration diagram of an AV stream recording / playback apparatus according to Embodiment 3 of the present invention.

FIG. 6 is a configuration diagram of an AV stream recording / playback apparatus according to Embodiment 4 of the present invention.

FIG. 7 is a diagram for explaining the states of the REC buffers 641, 642, the PLAY buffer 643, and the like in the memory means 240 in the AV stream recording / reproducing apparatus according to the fourth embodiment of the present invention. FIG.

FIG. 8 is a flowchart for explaining the operation of the AV stream recording / playback apparatus according to Embodiment 4 of the present invention.

FIG. 9 is a configuration diagram of an AV stream recording / reproducing apparatus according to Embodiment 9 of the present invention.

FIG. 10 is a flowchart for explaining the operation of the AV stream recording / reproducing apparatus according to Embodiment 9 of the present invention.

FIG. 11 is a diagram for explaining a configuration of an AV stream processed in the AV stream recording and reproducing apparatus according to the ninth embodiment of the present invention. FIG. 12 is a configuration diagram of an AV stream recording / reproducing apparatus according to a conventional technique.

FIG. 13 is a diagram for explaining a power-off state during recording of an AV stream and system information. FIG. 14 is a diagram for explaining the operation of the AV stream recording / playback device according to the fifth embodiment of the present invention. Explanation of reference numerals

100, 200, 500, 600 A V stream recording / reproducing device

1 10, 910 disk unit

1 20, 920 HDD controller

1 30, 210, 940 HDD controller for AV recording and playback

140, 240, 640, 950 memory means

141, 951 System information buffer

142, 242, 641, 642, 952 REC buffer

143, 243, 643, 953 PLAY buffer '1 5.0, 230 QUE with scheduler

220 Address monitoring means

5 10 Timer

930 QUE

960 System information-AV file consistency check controller Best mode for carrying out the invention;

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)

FIG. 1 is a configuration diagram of an AV stream recording / reproducing apparatus according to Embodiment 1 of the present invention. As shown in the figure, in the AV stream recording / reproducing apparatus 100, the disk device 110 includes, for example, an HDD stream, means for storing system information related to the AV stream, The HDD controller 120 is a unit for driving the disk device 110, the AV recording / reproducing HDD controller 130 is a unit for reading / writing the AV stream and system information from / to the disk device 110, and the memory unit 140 is an external device. Means for temporarily storing AV streams written to the disk drive from the disk drive, AV streams read out from the disk drive 110 to the outside, and system information; QUE 150 with scheduler is a memory; write request or read issued from the means After receiving and accumulating the requests, it is means for outputting the requests to the HDD controller 120 based on a predetermined priority. ·

Further, in the memory means 140, the system information buffer 141 is a means for temporarily recording system information, the REC buffer 142 is a means for temporarily recording an AV stream to be externally written to the disk device 110, and a PLAY The buffer 143 is a means for temporarily recording the AV stream read from the disk device 110 to the outside.

Further, the REC buffer 142 and the PLAY buffer 143 each have a structure internally divided into two, a REC buffer 142a, b and a PLAY buffer 143a, b.

In each of the above means, the configuration is the same as that of the conventional example except for the QUE 150 with the scheduler, but the QUE 1 '50 with the scheduler receives the read Z write request and once holds it, in accordance with the predetermined priority order. The difference is that an instruction corresponding to the order is issued to the HDD controller 120. The operation of the AV stream recording / reproducing apparatus according to the first embodiment of the present invention having the above-described configuration will be described below, whereby the embodiment of the AV stream recording / reproducing method of the present invention will be described. Is explained.

Recording (REC) operation from the outside to the AV stream recording / reproducing device 100 In this case, the AV stream input from the outside is accumulated in the REC buffer 142a of the memory means 140, and when the capacity of the REC buffer 142a becomes full, the external AV The storage destination of the stream is switched to the REC buffer 142b, and when the HDD controller 130 for AV recording and reproduction detects that the REC buffer 142a is full, the HDD controller 120 stores the disk in the REC buffer 142a. Request recording on device 110.

The request issued to the HDD controller 120 is temporarily stored in the QUE 150 with scheduler. .

At this time, the QUE 150 with the scheduler writes (a) a read request for the AV stream from the REC buffer 142 as the first priority request, and (b) a write of the AV stream to the play buffer 143 as the second priority request. An instruction execution priority scheduler, which is set in the order of (c) System information read / write request to the system information buffer 141, as a third priority request, and an HDD controller for AV recording and playback 1 A write request for each buffer in the memory means 140 issued from 30. Upon receiving a Z read request, regardless of the order of arrival of the request, based on the priority order of the first to third priority requests. issues an operation instruction to the HDD controller port over la 120, _c to drive the disk device 1 10 Thus, with the scheduler QUE 1 50, from the accumulated operation request always The first priority request (a) issues an AV stream read request from the REC buffer 142 to the HDD controller 120. Upon receiving the command, the HDD controller 120 drives the disk device 110, and the AV recording / reproducing HDD controller 130 records the AV stream read from the REC buffer 142 on the disk device 110. At this time, during the above operation, the AV recording / reproducing HDD controller 130 may issue a data read request from the system information buffer 141 to the QUE 150 with scheduler in order to record system information. However, in the QUE 150 with the scheduler, a request to read data from the system information buffer 141 is set as a third priority request.

Therefore, as long as (a) the read request for the AV stream from the REC buffer 142 is stored in the QUE 150 with the scheduler, the read request from the system information buffer 141 must be sent to the HDD controller 120. However, the disk device 110 always gives priority to the data read operation from the REC buffer 142.

Next, when a playback (PLAY) operation is performed externally from the AV stream recording / reproducing apparatus 1200, the following is performed. The HDD controller for AV recording and reproduction 130 issues a read request to the HDD controller 120. The read request is stored in QUE 150 with scheduler. '

The QUE 150 with scheduler has an instruction execution priority scheduler set, and, like the REC operation, sends an operation instruction to the HDD controller 120 based on the priority order of the first to third priority requests. And drive the disk unit 1 10¾r.

Therefore, since the REC operation is not currently performed, the QUE 150 with the scheduler is always the second priority request from the accumulated operation requests. (B) A request to write the AV stream to the PLAY buffer 143 To the HDD controller 120. Upon receiving the command, the HDD controller 120 drives the disk device 110, and the HDD controller for AV recording / reproduction 130 The AV stream is read from the disk device 110.

At this time, during the above operation, the AV recording / reproducing HDD controller 130 sends a data read request from the system information buffer 141 to the QUE 150 with scheduler to record system information. In some cases, a request to read data from the system information buffer 141 is set as the third priority request in the QUE 150 with the scheduler.

Therefore, a read request from the system information buffer 141 is sent to the HDD controller 120 as long as the (b) write request for the AV stream to the PLAY buffer 143 is accumulated in the QUE 150 with the scheduler. The disk device 110 always gives priority to the operation of writing the AV stream to the PL AY buffer 143, and

Next, when the AV stream recording / reproducing apparatus performs a simultaneous recording / reproducing operation such as time-shift reproducing, the AV recording / reproducing HDD controller 130 sends at least (a) a signal from the REC publisher 142 to the QUE with the scheduler. AV stream read request (b) Both write requests for the AV stream to the PLAY buffer 143 have been issued.

At this time, the QUE 150 with the scheduler sends the AV stream read request from the REC buffer 142, which is the first priority based on the set priority, to the second priority. (B) Gives an instruction to the HDD controller 120 in preference to a request to write the AV stream to the PLAY buffer 143.

Therefore, as long as the above (a) the read request of the AV stream from the REC buffer 142 is stored in the QUE 150 with the scheduler. (B) The request to write the AV stream to the PLAY buffer 143 is not sent to the HDD controller 120, and the disk device 110 always gives priority to the data read operation from the REC buffer 142. .

At this time, during the simultaneous recording / reproducing operation, the AV recording / reproducing HDD controller 130 issues a data read request from the system information buffer 141 to the QUE 150 with scheduler to record the system information. In some cases, in QUE 150 with a scheduler, the request to read data from this system information buffer 141 is set as a third priority request.

Therefore, as long as (a) the read request of the AV stream from the REC buffer 142 and (b) the write request of the AV stream to the PLAY buffer 143 are accumulated in the QUE 150 with the scheduler, the system information buffer 141 Is not sent to the HDD controller 120, and the disk device 110 first reads data from the REC buffer 142, and then writes the AV stream to the PLAY buffer 143. Perform the operation with priority.

When performing special playback such as double-speed playback or stop motion as the playback operation during the simultaneous recording / playback operation, the HDD controller for AV recording / playback 130 sends a PLAY buffer 143 to the QUE 150 with scheduler. A write request for special playback of the AV stream to the is issued.

At this time, in the QUE 150 with the scheduler, as the priority scheduler, in addition to the above-described first to third priority requests, and as a fourth priority request, (d) the AV queue to the PLAY buffer 143 Set a write request for trick trick play. As a result, the above REC operation, As in the case of the PLAY operation and the simultaneous recording / reproducing operation, the QUE 150 with the scheduler receives a write request / read request to each buffer in the memory means 140 issued from the AV recording / reproducing HDD controller 130. Regardless of the order of arrival of the requests, an operation command is issued to the HDD controller 120 based on the priority order of the first to fourth priority requests, and the disk device 110 is driven.

At this time, the (d) write request for special playback of the AV stream to the PLAY buffer 143 is set as a fourth priority request at a lower order than the write Z read request to the system information buffer 141. because, when writing to the disk device 1 10 from the system information buffer 141 is prioritized, there fear that mosquitoes ^s AV stream is interrupted to be special playback. -However, since the data to be specially reproduced is originally displayed in the form of fast-forwarding, frame skipping, etc., there is little effect on actual viewing, and recording of system information on the disk device 110 may be given priority.

In addition to the above operation, while the AV stream recording / reproducing apparatus is recording or reproducing an AV stream from outside, the HDD controller for AV recording / reproduction is controlled by an external controller (not shown). On the other hand, when a command for erasing the data recorded in the disk device 110 is issued, the fifth priority request for performing the processing corresponding to the deletion command is made by the first priority request and the second priority request described above. It may be set between requests.

This fifth priority request is issued to the disk executed in response to the data erase command.

This is a read / write request to the system information buffer 141 for updating the information of the disk device 110 accompanying the erasure of the data of 0. .

In the above example, the data recorded on the disk device 1'10 Although the description has been made assuming that the instruction is an erase instruction, the present invention is not limited to this instruction, and the same applies to an instruction requiring rewriting of the file system.

As described above, according to the present embodiment, by providing the QUE 150 with a scheduler that instructs the HDD controller based on the determined priority according to the issued operation request, the type of operation is By prioritizing data read / write from / to the disk drive according to the degree of importance, interruption of data during recording and playback of AV stream is minimized, and interruption occurs. Even in this case, it is possible to maintain the quality of the data to be reproduced or recorded.

(Embodiment 2)

FIG. 2 shows a configuration (2) of an AV stream recording / playback apparatus according to Embodiment 2 of the present invention. As shown in the figure, in the AV stream recording / reproducing apparatus 200, the same or corresponding parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted. Also, the HDD controller 210 for AV recording / reproduction is a means for reading and writing AV stream / system information to / from the disk device 110 based on the monitoring of the address monitoring means 220, and the QUE 230 with a scheduler is a memory. After receiving and storing a write request or a read request issued from the means 240, the request is output to the HDD controller 120 based on a predetermined priority.

In the memory means 240, regarding the REC buffer 242 and the PLAY buffer 243, the data buffer has a threshold of 300a for the REC buffer 242a, the threshold 300b for the REC buffer 242b, and the PLAY buffer 243. The data capacity threshold 300c is set for a, and the data capacity threshold 300d is set for the PLAY buffer 243b.

Next, Fig. 3 (a) and (b) show the REC buffer 2 in the memory means 240. FIG. 41 is a diagram for explaining states of the P buffer 42 and the PLAY buffer 243. As shown in the figure, the AV stream storage pointer 310 is a means for the address monitoring means 220 to monitor the data capacity of the REC buffer 242, and the AV stream transmission pointer 320 is a This is a means for monitoring the data capacity of 243.

The operation of the AV stream recording / reproducing apparatus according to the present embodiment having the above-described configuration will be described below, and thereby, an embodiment of the AV stream recording / reproducing method of the present invention will be described. I do. First, the REC operation of the AV stream will be described.

When the REC operation is started, the recording AV stream input from the outside is accumulated sequentially from the head of the REC buffer 242a, and the AV stream accumulation pointer 310 moves to the REC buffer 242b accordingly.

When the storage of the external AV stream in the REC buffer 242a is completed, the external AV stream recording operation is continued for 1 £ (the storage destination is changed to the buffer 242b. The trim accumulation pointer 310 also moves to the end of the REC buffer 242b (accumulation direction a in FIG. 3).

Here, as shown in FIG. 3 (a), the REC buffer 242b is in a state where the accumulation of the AV stream has already been completed and the data needs to be stored in the disk device 1ϊ0. b is a state where the AV stream is currently being accumulated from outside.

Next, the HDD controller for AV recording / reproducing 210 issues a request for an operation to the disk device to the QUE 230 with the scheduler. In the present embodiment, the QUE 230 with the scheduler When passing an operation request to the disk device, For the access operation requests stored in QUE ', the urgency of the request is determined, and if there is an urgent request, the request is given priority and passed to the HDD controller 120. Here, “urgency” is determined based on the amount of data in the REC buffer 242. The following describes how the REC Buffer 242 determines whether there is “urgency”.

The QUE 230 with scheduler refers to the AV stream storage pointer via the address monitoring means 220 while the AV stream is being stored in the REC buffer 242 from the outside, and the REC buffer 242 Monitor the accumulation status of AV stream in a and b.

At this time, as in the above operation, the AV stream is fully accumulated in the REC buffer 242a, and the AV stream accumulation pointer 310 in the REC buffer 242b advances beyond the threshold value 300b. In this case, the operation of writing the data in the REC buffer 242a to the disk device 110 is determined to be urgent, and the QUE 230 with scheduler sends the REC buffer to the HDD controller 120. Issue a request to read the data in 242a. The HDD controller 120 performs a required access operation to the disk device 110.

In the above operation, the threshold value 300b is, for example, (the time required to save the data in the REC buffer 242a to the disk device)> (exceeding the threshold value 300b to the REC buffer 242b from the outside) The time until the AV stream is accumulated). 'Next. Next, the data in the REC buffer 242a is recorded in the disk device 110, and the REC buffer 242a becomes empty. When the recording of the REC buffer 242 b is full, the data is stored again in the £ 1 (: buffer 242 a (accumulation direction b in FIG. 3). In this case, the threshold value is set to the threshold value 300a in the REC buffer 242a, and the AV stream storage pointer 310 in the REC buffer 242a advances beyond the threshold value 300a. In this case, the operation of writing the data in the REC buffer 242 b to the disk device 110 is determined to be urgent, and the QUE 230 with scheduler sends the REC buffer 242 b to the HDD controller 1.20. Issues a request to read data in

Next, the PLAY operation of the AV stream will be described.

When the PLAY operation is started, the AV streams read from the disk device 110 are accumulated in order from the beginning of the PLAY buffer 243a, and the AV stream transmission pointer 320 is accordingly set to the PLAY buffer 7243b in accordance with that. Move to.

When the storage of the AV stream from the disk device 110 in the PLAY buffer 243a is completed, the data in the PLAY buffer 243a is sent to the outside, and the operation of storing the AV stream from the disk device 110 is performed as follows. The storage destination is changed to the PLAY buffer 243b, and is continued. Also, the AV stream sending pointer 320 moves to the end of the PLAY buffer 243b (the sending direction a in FIG. 3). '

Here, as shown in FIG. 3 (b), the PLAY buffer 243a is in a state where the AV stream has already been sent and the data needs to be stored, while the PLAY buffer 243b is currently This is a state where the AV stream is being accumulated from the disk device 110.

Next, the AV recording / reproducing HDD controller 210 issues an operation request to the disk device to the QUE 230 with the scheduler. In the present embodiment, the QUE 230 with the scheduler When passing an operation request to the disk device, For the access operation requests stored in the QUE, the urgency of the request is determined, and if there is an urgent request, the request is given priority and passed to the HDD controller 120. Here, “urgency” is determined based on the amount of data in the PLAY buffer 243. Hereinafter, the determination of the presence or absence of “urgency” of the PLAY know-how 243 will be described.

The QUE 230 with the scheduler refers to the AV stream transmission pointer 320 via the address monitoring means 220 while the AV stream is being stored in the PLAY buffer 243 from the disk device 110, and the PLAY buffer 243 Monitor the accumulation status of AV streams in a and b.

At this time, as in the above operation, the AV stream is empty in the PLAY buffer 243a, and the AV stream transmission pointer 320 in the PLAY buffer 243b advances beyond the threshold 300d. In this case, the operation of writing the AV stream from the disk device 110 to the play buffer 243a is determined to be urgent, and the QUE 230 with scheduler sends the PLAY buffer to the HDD controller 120. Issue a data write request to the key 243a. The HDD controller 120 performs a required access operation to the disk device 110.

In the above operation, the threshold value 300d is, for example, (the time required to write data from the disk device 110 to the PLAY buffer 243a). The time until the AV stream of the PLAY buffer 243 b 內 is transmitted).

Next, the PLAY buffer 243b sends an AV stream to the outside and becomes empty, while the PLAY buffer 243a stores the disk device 110 in the PLAY buffer 243a. The AV stream is written (transmission direction b in FIG. 3). In this case, the threshold value is set to the threshold value 30 Oc in the PLAY buffer 243a, and the AV stream sending pointer 320 in the PLAY buffer 243a exceeds the threshold value 300c. If it has proceeded, the operation of writing the data in the PLAY buffer 243 b to the disk device 110 is determined to be urgent, and the QUE 230 with scheduler sends the disk device 1 1 1 to the HDD controller 120. From 0, a request to write data to the PLAY buffer 243b is issued.

Next, FIG. 4 shows a flowchart of the AV stream recording / reproducing apparatus of the present embodiment when the simultaneous recording / reproducing operation is performed. Hereinafter, an operation example of the present embodiment will be described with reference to this flowchart.

First, the HDD controller 210 for AV recording and playback monitors the system information buffer 141, REC buffer 242, and PLAY buffer 243. The QUE 230 with scheduler receives a signal from the REC buffer 242. A request to read the AV stream, a request to write the AV stream to the PLAY buffer 243, and a request to read the system information from the system information buffer 141 are made (step 401). · When the QUE 230 with the scheduler receives the above request from the AV recording / reproducing HDD controller 210, the QUE 230 temporarily accumulates the request and uses the address monitoring means 220 to store the data capacity of the REC buffer 242 and the PLAY buffer 243. Is monitored with reference to the AV stream storage pointer 310 and the AV stream transmission pointer 320. At this time, monitoring is performed in the order of the RE C buffer 242 (step 403) and then the PLAY buffer 243 (step 404).

At step 403, based on the reference of the AV stream storage pointer 310, the data capacity of the REC buffer 242b reaches the threshold value 300b, When it is determined that the data needs to be read, the QUE 230 with the scheduler instructs the HDD controller 12.0 to read the AV stream from the REC buffer 242 among the stored requests. . The HDD controller 120 that has received the command activates the disk device 110, reads and records the data in the REC buffer 242 (step 406).

On the other hand, if it is determined in step 403 that the data capacity of the REC buffer 242b has not reached the threshold value 300b based on the reference of the AV stream storage pointer 310, it is not necessary to read data. The QUE with scheduler 230 determines whether the data capacity of the PLAY buffer 243b has reached the threshold value 300d based on the reference of the AV stream transmission pointer 320 (step 404).

If it is determined in step 404 that the data capacity of the PLAY buffer 243b has reached the threshold value 300d based on the reference of the AV stream transmission pointer 320 and it is determined that the data needs to be read out, Instructs the HDD controller 120 to write the AV stream to the PLAY buffer 243 among the accumulated requests. The HDD controller 120 that has received the command activates the disk device 110, reads out the data, and records it in the PLAY buffer 243 (step 407).

On the other hand, if it is determined in step 404 that the data capacity of the PLAY buffer 243b has not reached the threshold value 300b based on the reference of the AV stream accumulation pointer 310, it is determined that there is no need to write data. The QUE 230 with the scheduler instructs the HDD controller 120 to read the system information from the system information buffer 141 and records the system information on the disk device 110 (step 405). . As described above, according to the present embodiment, interruption of data during recording and reproduction of an AV stream on a disk device is minimized, and even when interruption occurs, the quality of data reproduced or recorded is improved. Can be held.

In the above flowchart, the description has been made on the assumption that the monitoring of the PLAY buffer 243 is performed after the monitoring of the REC buffer 242, but it is assumed that the monitoring of the PLAY buffer 243 is performed first. Is also good.

(Embodiment 3)

FIG. 5 is a configuration diagram of an AV stream recording / playback apparatus according to Embodiment 3 of the present invention. As shown in the figure, in the AV stream recording / reproducing apparatus 500, the same or corresponding parts as those in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted. The timer 510 measures the time and works in conjunction with the address management means 220 to measure the data write Z read speed to the REC buffer 242 and the PLAY buffer 243 in the memory means 240. It is a means for

The operation of the AV stream recording / reproducing apparatus according to the present embodiment having the above-described configuration will be described below, and thereby an embodiment of the AV stream recording / reproducing method of the present invention will be described. . However, parts common to the second embodiment are omitted, and differences are mainly described. In the present embodiment, the provision of the timer 510 linked to the address monitoring means 220 allows the writing speed of the recording AV stream to the REC buffer 242 in the memory means 240 to be improved. The playback speed of the AV stream from the PLAY buffer 243 can be measured, and the value of the threshold value set in each buffer can be changed according to the writing or playback speed. As a result, when the AV stream recording / reproducing device 200 is performing the simultaneous recording / reproducing operation, the writing speed of the AV stream to the REC buffer 242 during recording is low, and the transmission speed of the AV stream from the PLAY buffer 243 However, if the writing speed is higher than the writing speed, the threshold values 300 c and 300 d of the PLAY buffer 243 a and b are set to lower values, and the instruction operation for the HDD controller 120 of the QUE 230 with scheduler is performed. As a result, it is possible to create a state in which an AV stream write request to the PLAY buffer 243 is given priority over an AV stream read request from the REC buffer 242.

At this time, the change of the threshold value may be performed by the HDD recording / reproducing HDD controller 210 or may be performed by control means (not shown).

Further, although the present embodiment has been described as a configuration in which timer 510 is added to the configuration of Embodiment 2, a configuration in which timer 510 is added to the configuration of Embodiment 1 may be used. In this case, in the first embodiment, the priority of the instruction execution priority scheduler is set as the first priority request. (A) The AV stream read request from the REC buffer 242 and the second priority request are set as ( b) A request to write the AV stream to the PLAY buffer 243, as the third priority request. (c) A read of the system information to the system information buffer 141, which was fixed as a Z write request. The priority can be changed according to the read speed of the AV buffer and the playback speed of the AV stream from the PLAY buffer 243, and the request (b) can be set as the first priority request.

Further, the configuration may be such that a conventional AV stream recording / reproducing device shown in FIG. 12 is provided with the kedress monitoring means 220 and the timer 510. In this case, the QUE 230 with scheduler transmits the AV data to the RE buffer 242. It is possible to change the execution order of the issued requests according to the stream reading speed and the playback speed of the AV stream from the PLAY buffer 243, and issue the requests to the HDD controller 120.

As described above, according to the present embodiment, interruption of data during recording and reproduction of an AV stream on a disk device is minimized, and even when interruption occurs, the quality of data reproduced or recorded is improved. Can be held.

(Embodiment 4)

FIG. 6 is a configuration diagram of an AV stream recording / reproducing apparatus according to Embodiment 4 of the present invention. As shown in the figure, in the AV stream recording / reproducing apparatus 600, the same or corresponding parts as those in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted. Further, the memory means 640 of the present embodiment is a means provided with a two-channel REC buffer 641 and a およ REC buffer 642, and a one-channel PLAY buffer of a PLAY buffer 643.

The operation of the AV stream recording / reproducing apparatus according to the present embodiment having the above-described configuration will be described below, and thereby an embodiment of the AV stream recording / reproducing method of the present invention will be described. . However, parts common to the second embodiment will be omitted, and differences will be mainly described. In the present embodiment, the memory means 640 is a two-channel REC buffer having RE buffers 641 and 642. The read operation of the AV stream from the REC buffer is performed in parallel with the number (2) of the REC buffers. At this time, the T and AV streams are stored independently in the REC buffer 641 and the REC buffer 642, and the REC buffers 641a and 641b and the REC buffers 642a and 642b are completely stored. To wait for storage on the disk 110, and a state of storing. That is, the REC buffers 642 a and 642 a have been completely accumulated and the REC buffers 641 b and 642 b are being accumulated, and the REC buffers 641 a and 642 b have been completely accumulated and the REC buffers 641 b and 642 _a have been accumulated. During storage, REC buffers 641 b and 642 a have completed storage, and REC buffers 641 a and 642 b have been stored, while REC buffers 641 b and 642 b have completed storage and REC buffers 641 a and 642 a have been stored. It can be in the state of accumulation.

Therefore, the number of operation requests issued from the AV recording / reproducing HDD controller 210 to the QUE 230 with a scheduler changes according to the number of channels, whereas the number of operation requests issued from the HDD controller 120 to the disk device 1 10 varies. In the present embodiment, the threshold values set in the REC buffer and the PLAY buffer are reduced as the number of channels increases, since the processing time of the access operation to the PHY buffer is the same.

Here, FIG. 7A is a diagram schematically showing a change in the threshold value in the REC buffers 641 and 642, and FIG. 7B is a diagram schematically showing a change in the threshold value in the PLAY buffer 643. FIG.

As shown in the figure, the REC buffer operates with a threshold of 700 a when operating with one channel (either the REC buffer 641 or 642) and operating with two channels (REC buffers 641 and 642). The threshold 700a 'is set lower than the threshold 700a'. 'Similarly, in the PLAY buffer, the threshold b when operating on one channel (PLAY buffer 643) and the threshold b when operating on two channels (not shown in Figure 6) In, the thresholds b and are set lower. For example, if the REC buffer has one channel, set the threshold 700a to 80% of the total data capacity of the buffer. And, in the case of when the REC buffer is 2-channel, the threshold 700 a, a, also _c is set to 60% of the total data capacity of one channel RE C buffer, the threshold 700 a, as a setting method of In the case of the two-channel REC buffers 641 and 642 shown in FIG. 6, for example, (the time required to store the data of both the REC buffer 641 a and the REC buffer 642 a to the disk device 110) > (Time until the AV stream is accumulated in the REC buffer 641b or the REC buffer 642b after exceeding the threshold 700a). If the number of channels is 3 or more, the data amount is “half the capacity of the REC buffer for one channel.

(For example, the time required to store the data of “number of channels” in the disk drive 110) <(the capacity of the RE C buffer 641a, 641b) <(the threshold of 700 a Time until the AV stream is accumulated in each buffer).

Next, as a method of setting the threshold value 700b, if the PLAY buffer has two channels, for example, (half of the capacity of one PLAY buffer and half of the capacity of the other PLAY buffer) , The time required to write data from the disk device 110) <(the time until the AV stream of one or the other PLAY buffer stored in the position after the threshold 700b 'is transmitted) Shall be defined as If the number of channels is 3 or more, the disk device 1 (for the P-lay buffers of a and b for one channel, for example (for the p-lay buffer 643a and the p-lay buffer 634b)) Time required to write data from 0 ”X number of channels) (Threshold 700b, time until the AV stream of each channel's PLAY buffer stored in the subsequent positions is transmitted) I do.

Next, FIG. 8 shows a case where the simultaneous recording / reproducing operation is performed. 5 shows a flowchart of an AV stream recording / reproducing apparatus 600. Hereinafter, an operation example of the present embodiment will be described with reference to this flowchart.

First, the HDD controller 210 for AV recording / playback monitors the system information buffer 141, REC buffers 641, 642, and PLAY buffer 643. The QUE 230 with scheduler sends the AV buffer from the REC buffers 641, 642 to the QUE 230 with scheduler. A stream read request, an AV stream write request to the PLAY buffer 643, and a system information read request from the system information buffer 141 are made (step 801.).

When the QUE 230 with the scheduler receives the above request from the AV recording / reproducing HDD controller 210, the QUE 230 temporarily accumulates the request, and uses the address monitoring means 220 to send 1 £ (buffers 641, 642 and PLAY buffer 643). The data capacity is monitored with reference to the AV stream accumulation pointer and the AV stream transmission pointer, first by monitoring the REC buffer 641 (step 803), then the REC buffer 642 (step 804), and the PLAY buffer. The steps are performed in the order of 643 (step 805).

If it is determined in step 803 that the data capacity of the REC buffer 641a has reached the threshold value 700a, based on the reference of the AV stream storage pointer 310, and that it is necessary to read data, The QUE 230 with a scheduler instructs the HDD controller 120 of a request to read an AV stream from the REC buffer 641, among the accumulated requests. Upon receiving the instruction, the HDD controller 120 activates the disk device 110, reads and records the data in the REC buffer 641 (step 807).

On the other hand, in step 803, the AV stream storage pointer 310 is referred to. If it is determined that the data capacity of 1 £ (: Puffer 641 & has not reached the threshold 700a 'and that it is not necessary to read the data, the QUE 230 with the scheduler sends the AV stream accumulation pointer Based on the reference to 310, it is determined whether or not the data capacity of the REC buffer 642a has reached the threshold value 700a '(step 804).

In step 804, based on the reference of the AV stream accumulation pointer 310, if it is determined that the data capacity of the REC buffer 642a has reached the threshold value 700a and it is necessary to read data, The QUE 230 instructs the HDD controller 120 of an AV stream read request from the REC ^ 77642 2 among the stored requests. Upon receiving the instruction, the HDD controller 120 activates the disk device 110, reads and records the data in the REC buffer 642 (step 808).

On the other hand, if it is determined in step 804 that the data capacity of the REC buffer 642a has not reached the threshold 700a 'based on the reference of the AV stream accumulation pointer 310, and that it is not necessary to read data. The QUE 230 with scheduler determines whether the data capacity of the PLAY buffer 643 has reached the threshold value 700b 'based on the reference to the AV stream transmission pointer 320 (step 805).

In step 805, based on the reference of the AV stream transmission pointer 320, if the data capacity of the PLAY buffer 643 has reached the threshold value 700b, and it is determined that the data needs to be read out, 230 instructs the HDD controller 120 to write the AV stream to the PLAY buffer 644 among the accumulated requests. Upon receiving the instruction, the HDD controller 120 starts the disk device 110, reads the data, and writes the data to the PLAY buffer 643. Record (step 809).

On the other hand, if it is determined in step 805 that the data capacity of the PLAY buffer 643 a has not reached the threshold value 700 b ′ based on the reference of the AV stream accumulation pointer 310 and it is not necessary to perform data writing. The QUE 230 with scheduler instructs the HDD controller 120 to read the system information from the system information buffer 1.41 and records the system information in the disk device 110 (step 806).

As described above, according to the present embodiment, even when there are a plurality of channels of AV stream buffers included in the memory means, interruption of data during recording and reproduction of the AV stream on the disk device is suppressed as much as possible. In addition, even if a break occurs, the quality of data to be reproduced or recorded can be maintained.

In the above flowchart, the description has been made on the assumption that the monitoring of the REC buffer 641 and the REC buffer 642 is performed, and then the monitoring of the PLAY buffer 643 is performed. May be performed first. Further, the order of monitoring between the REC buffers 641 and 642 may be changed.

(Embodiment 5)

The AV stream recording / reproducing apparatus according to the fifth embodiment of the present invention is configured such that when the apparatus is started, the AV stream recorded on the disk device is matched with the system information for managing the AV stream. It is.

FIG. 9 is a configuration diagram of an AV stream recording / reproducing apparatus according to Embodiment 5 of the present invention. As shown in the figure, in the AV stream recording / reproducing device 900, the disk device 910 is, for example, an HDD, means for storing an AV stream and system information related to the AV stream, The HDD controller 920 is a means for driving the disk device 910, and the QUE 930 receives and stores a write request or a read request issued from the HDD controller 940 for AV recording / reproducing, and then stores the HDD controller in the order of receiving the request. Means for outputting to the 920; an HDD controller for AV recording / reproduction 940; means for reading / writing AV stream / system information from / to the disk device 910; memory means 950; an AV stream which is externally written to the disk device; Means for temporarily storing the AV stream read from the disk device 910 to the outside and the system information, and the system information-AV file matching check controller 960 refers to the data in the HDD controller 920 and the system information. Data written to the disk drive by the HDD controller and system information There is a means to check whether the match.

Also, in the memory means 950, a system information buffer 951 is a means for temporarily recording system information, an REC buffer 952 is a means for temporarily recording an AV stream written from the outside to the disk device 910, The LAY buffer 953 is a means for temporarily recording the AV stream read from the disk device 910 to the outside.

Further, each of the REC buffer 952 and the PLAY buffer 953 has a configuration internally divided into two REC buffers 952a, b and PLAY buffers 953a, b.

Each of the above means has the same configuration as that of the conventional example except that the system information-AV file consistency check controller 960 is provided. Further, when an AV stream is input from outside, the AV stream recording / reproducing apparatus 900 continuously records the AV stream into a disk unit in DAU (disc access • Un.it) units described later, and starts recording. Recorded from An AV stream consisting of a plurality of DAUs up to the end is managed as an AV file, which is an example of the object of the present invention. System information is periodically managed at a predetermined timing in order to manage this AV file. Specifically, it is assumed that the information is information recorded on the disk device 910.

The operation of the AV stream recording / reproducing apparatus 900 having the above-described configuration will be described below with reference to the flowcharts shown in FIGS. 9 and 10, and thereby, an embodiment of the AV stream recording method of the present invention will be described. The form will be described. However, parts similar to those in the conventional example are omitted, and only differences are described.

First, it is assumed that the AV stream recording / reproducing device 900 has been turned on from a power-off state (step 1000).

Next, the system information-AV file matching checker controller 960 searches for the AV stream recorded on the disk device 910 until the power is turned off in units of AV files, and constructs the AV file in the AV file. Detects the end of the AV stream and refers to the system information for managing the AV file, and determines whether the end of the AV stream matches the recording end of the AV stream described in the system information. (Step 1001).

Next, in step 1001, if the end of recording of the AV stream and the end of recording of the AV stream described in the system information match, all the AV files recorded in the disk device 910 are read. It is determined whether or not a check has been performed (step 1002). If all the AV files have been checked, the system information and AV file consistency check controller 960 terminates the operation (step 1003). If there is an unchecked AV file, perform the operation of playback step 1 001. On the other hand, in step 1001, if the recording end of the AV stream and the recording end of the AV stream described in the system information do not match, the system information-AV file consistency check controller 960 will return. Then, a process of matching the recording end of the system information relating to the AV file with the end of the AV stream is performed (step 1004).

Here, the operation of step 104 will be described in detail.

As described with reference to FIG. 13, during recording of an AV stream, while performing a recording operation for periodically recording system information at a predetermined timing, an AV or the like occurs due to an accident or the like. If the power is turned off during the trim recording operation, the data actually recorded in the AV stream on the disk device 9100 becomes data that can be managed by the AV file C1330. In addition, despite the fact that some data was recorded in the range from time T1 to T2 in the figure, the system information is in a state where only the data up to the AV file C1330 can be managed. A mismatch occurs between the actually recorded AV stream and the AV file, that is, the system information.

In the AV stream recording / reproducing apparatus according to the present embodiment, the system information-AV file consistency check controller 960 corrects this mismatch in two ways.

The first method is based on the contents of system information recorded on a disk device. An AV stream that can be managed as an AV file C1330 and its system information are recorded on the disk device 9110. .

Therefore, the system information-AV file matching checker controller 960 sends the AV information recorded on the disk device between the storage timing of system information 1300 c and the power-off 134 0 that is not described in the system information. Delete the stream to record system information related to the AV file The end is matched with the recording end of the AV stream recorded on the disk device 910.

Finally, the system information-AV file consistency check controller 960 temporarily determines the AV file up to the storage timing 1300c as being manageable by the disk device 910.

The system information will be described in more detail. System information is mainly divided into FAT information and object information. The FAT (File Alloc a tio nta b le) information indicates the recording order of the AV stream, and the object information is for recording the AV stream in units of programs. By setting this object information as the end, the FAT information at the end of the recording of the system information, the recording time of the AV stream, and the data size of the AV stream are determined, and the AV file having such information is temporarily stored. Is determined.

The second method is to rewrite the contents of system information based on the end of recording of the AV stream recorded on the disk device.

FIG. 11 is a diagram showing a configuration of a DAU (Dice Access Unit) which is a unit AV stream which is a recording unit on the disk device 910 of the AV stream.

As shown in the figure, the DAU 1 100 is composed of two types of data, a DAU header 1 1 10 and a pay mode 1 120, and the D AU header 1 1 1

0 stores information on the DAU itself, and the payload 1 120 stores the actual data of the AV stream.

At this time, the DAU header 1 110 includes the number of the DAU adjacent to the front and rear of the DAU having the DAU header (in the case of D AU 1 100b in FIG. 11, the adjacent D AU is D AU 1 100 a and DAU 1 100 c), and the recording position on the disk that is the recording medium in the disk unit 910. Is stored as pointer 1 1 30.

By doing so, when performing the PLAY operation, it is possible to access by referring to the DAU header 1 1 10 so that the FAT (File

Alloc a tio o T ab le e) It is not necessary to perform operations such as searching for information, and the access efficiency of the disk devices 9 and 10 can be improved.

By the way, during the recording operation of the AV stream having the configuration of FIG. 11, when the power-off 1 340 as shown in FIG. 13 occurs, the pointer 1130 indicating the relation between the D AUs becomes halfway. In some situations.

The system information-AV file consistency check controller 960 of the present embodiment accesses the DAU header 1 110 and restores the pointers 1130 of the preceding and succeeding numbers between the DAUs.

In particular, the DAU at the recording end of the AV stream may be recorded on the disk device 910 with the DAU header holding a pointer indicating the DAU number to be recorded next to the DAU in the DAU header. . In this case, the system information-AV file consistency check controller 960 finds a break in the recorded AV stream data, and performs a process of writing that information to the terminal DAU. '. More specifically, every time the AV stream recording / reproducing device 900 performs a REC operation, a common number incremented each time is recorded in the D AU header of each D AU, and the system Information 1. The AV file matching check controller 9.60 tries to find the discontinuity of the number.

Further, when the system information-AV file consistency check controller 960 finds the DAU at the recording end of the AV stream from the DAU header or the payload, it rewrites the system information recorded on the disk device 910 based on the DAU. The end of the DAU recorded in the system information should match the DAU at the end of recording in the AV stream. I do.

Next, in the example shown in Fig. 13, at the point when the power is turned off 1340, the system information manages the AV stream up to the AV file C1330 according to the save timing 1300C, and the DAU termination Is set to DAU1 100, but the system information AV file consistency check controller 960 detects the DAU1100 at the time of the power-off 1340, and the system information is transferred to the DAU1100. Rewrite as including. By rewriting the system information, a new AV file D1350 is generated. This includes the AV stream of the AV file C and the AV stream of the DAU from the DAU 1100 to the end of recording of the AV stream.

Finally, the system information-AV file consistency check controller 960 temporarily determines an AV file including the AV stream up to time T2 as being manageable by the disk device 910.

The above operation will be described using FAT information and object information as in the case of the first method. The object information determines the FAT information at the end of the recording of system information, the recording time of the AV stream, and the data size of the AV stream. Update the FAT information and other information by rewriting based on DAU, set the object information as the end, and temporarily determine the AV file.

Further, after the AV stream recording / reproducing device 900 recovers from the power interruption, it can resume the input of the AV stream which had been accepting the input until the power interruption occurred, and the recording of the AV stream can be restarted. The _c- disk device 901 can be used to target the AV file temporarily fixed at the time when the power is turned off. The AV file based on the V stream or system information is temporarily determined, and the AV stream in the AV file is in a playable state. If it detects that the AV stream recorded in the 901 is the same as the AV stream that was input before the power was turned off, it will be temporarily recorded as an AV stream by one of the above two methods. Set the confirmed AV file. At this time, the system information-AV file consistency check controller 960 rewrites the system information of the AV file, and makes the confirmed AV file unconfirmed, that is, a state in which the AV stream can be additionally written.

This will be described using object information. For a temporarily determined AV file, the object information is set to the end, so that the recording time of the FAT information and the AV stream at the end of the recording of the AV file is set. Although the data size of the stream is determined, the system information-The AV file consistency check controller 960 rewrites this object information not to the end, so the recording time of the AV stream and the data size of the AV stream are undefined. Rewritten to fixed. However, since the FAT information merely indicates the recording order of the AV stream on the recording medium, the content itself is not rewritten.

As shown in FIG. 14, when the timing of saving the system information immediately before the power failure occurs, as shown by the broken line in the figure, when the data recording of the entire DAU is located in the middle, the system information is The entire DAU including the shaded area is set assuming that data recording is completed.

This allows you to start with the DAU next to the DAU that includes the data in the shaded area when performing the appending operation. In other words, if this system information is not set, the data in the shaded area is regarded as unrecorded during the additional recording operation. It is necessary to record the entire DAU again, but with the above processing, it is not necessary to perform the recording operation of the AV stream に duplicated in the same DAU, and it is possible to realize the rapid additional recording operation .

As described above, according to the present embodiment, even if the device loses power due to an accident or the like during recording of the AV stream, the A stream or file recorded by the time of the power failure is recorded. Based on the information, the AV file is determined, preventing inconsistency between the recorded AV stream and system information, and the AV stream that was recorded before the power failure occurred can be played Can be saved as an AV file.

If the recording of the AV stream is restarted after the power is turned off, the AV stream that has been the target of recording can be added to the recording of the AV stream.

Although the above operation has been described as detecting the end of the AV stream and the stream by referring to the pointer included in the DAU head of the AV stream, the present invention is not limited to this. Directly refer to time information stored in the same continuously recorded AV stream to find the DAU at the recording end of the AV stream and the DAU break to be recorded next to the DAU. It may be.

Further, in the above operation, description has been made assuming that the system information is periodically recorded in the disk device 910. However, the present invention is not limited to this. Alternatively, the information may be intermittently recorded in the disk device 910. Further, the system information may be continuously recorded as in the case of the AV stream. In short, the AV stream recording / reproducing apparatus of the present invention performs the above processing as long as it can record continuously recorded AV streams and non-continuously or continuously recorded system information. It can be carried out Things. -The configuration of the AV stream recording / reproducing device 900 described above is described as being realized on a conventional AV stream recording / reproducing device equipped with a HDD controller ^ "920 that receives instructions from the conventional Q UE 930. However, the system information-AV file consistency check controller 960 of the present embodiment may be realized as a configuration added to the AV stream recording / reproducing apparatus of the above-described first to fourth embodiments. In this case, the operation of processing the request from the HDD controller 940 for AV recording and reproduction by the QUE 230 with a scheduler ^ In addition, the interruption of data during recording and reproduction of the AV stream to the disk device is minimized. In addition, even when a break occurs, the quality of data to be reproduced or recorded can be maintained.

In the first to fourth embodiments, the AV recording / reproducing HDD controller 940, the address monitoring means 220, and the timer 510 are examples of the request generation means of the present invention. The QUE 230 with a scheduler is an example of the operation determining means of the present invention. Further, the HDD controller 120 and the disk device 110 are examples of the recording / reproducing means of the present invention.c In the fifth embodiment, the HDD controller 920 and the disk device 910 are the recording / reproducing means of the present invention. This is an example. Further, the system information-AV file consistency check controller 960 is an example of the consistency means of the present invention.

At this time, the configuration of the AV stream recording / reproducing apparatuses 100, 200, 500, and 600 according to the first to fourth embodiments uses a disk device 910 capable of recording / reproducing the AV stream and system information, and the memory means is a system. Although the description has been made assuming that the apparatus has an information buffer, the c stream recording / reproducing apparatus of the present invention is not limited to this. The recording and reproduction may be omitted.

Further, the configuration of the AV stream recording / reproducing device 900 according to the fifth embodiment uses the disk device 910 capable of recording / reproducing the AV stream, but the recording means of the AV stream recording / reproducing device of the present invention is However, the present invention is not limited to this, and it is assumed that a disk device that performs only recording is used.In each of the above embodiments, the REC buffers 142, 242, 641, 642, 952, and PLAY buffer of the memory means are provided. Although 142, 242, 641, 642, and 952 are described as being divided into two blocks (indicated by a and b), the same applies to the case where there are three or more blocks. Operation can be performed immediately.

Further, in the above description, the AV stream recording / reproducing apparatus and the AV stream recording apparatus according to the embodiment of the present invention have been described. However, the present invention provides the above-described AV stream recording / reproducing apparatus of the present invention. And a program for causing a computer to execute the functions of all or a part of the AV stream recording device (or device, element, circuit, unit, etc.), and a program that operates in cooperation with the computer. It may be.

The present invention also provides a program for causing a computer to execute all or some of the functions of all or some of the above-described AV stream recording / reproducing apparatus and AV stream recording apparatus of the present invention. The program may be a medium that is readable by a computer and that executes the function in cooperation with the computer.

It should be noted that some means (or devices, elements, circuits, units, etc.) of the present invention, Some steps (or steps, actions, actions, etc.) of the invention mean several means or steps of the plurality of means or steps, or one of the means or steps. , Means some functions or some operations.

Further, some devices (or elements, circuits, units, and the like) of the present invention mean several devices among a plurality of devices, or one device among one device. It means the means of a unit (or an element, a circuit, a unit, etc.), or means a part of the function of one means.

Further, a computer-readable recording medium that records the program of the present invention is also included in the present invention. .

Further, one usage form of the program of the present invention may be a form in which the program is recorded on a computer-readable recording medium and operates in cooperation with the computer.

One use form of the program of the present invention may be a form in which the program is transmitted through a transmission medium, read by a computer, and operates in cooperation with the computer.

Further, the data structure of the present invention includes a database, a data format, a data table, a data list, a data type, and the like.

The recording medium includes ROM and the like, and the transmission medium includes transmission media such as the Internet, light, radio waves, and sound waves. Further, the computer of the present invention described above is not limited to pure hardware such as CPU, but may include firmware, OS, and peripheral devices.

As described above, the configuration of the present invention may be realized by software or hardware. Industrial applicability

As is apparent from the above description, according to the present invention, an AV stream recording / reproducing apparatus capable of reducing the influence on data during recording or reproduction due to interruption of the AV stream occurring during recording / reproduction, etc. Can be obtained.

Further, according to the present invention, it is possible to obtain an AV stream recording device or the like that can eliminate the inconsistency between the recorded AV stream and the system information without interrupting the operation during operation.

Claims

The scope of the claims

1. Recording / playback means for performing a plurality of types of recording / playback operations related to the AV stream;

An operation determining means for selecting a specific operation from the request queue based on a predetermined criterion, and determining an operation to be performed next by the recording / reproducing means, wherein the predetermined criterion is An AV stream recording / reproducing device that has a priority determined according to the type.

2. The AV stream recording / reproducing apparatus according to claim 1, wherein the priority order changes according to a recording speed of data in the recording buffer or a reproducing speed of data reproduced from the reproducing buffer.

3. Recording / playback means for performing a plurality of types of recording / playback operations on the AV stream,

By monitoring whether the amount of data read from the recording buffer or the amount of data written to the reproduction buffer reaches a predetermined threshold, a predetermined type of operation request executed by the recording / reproduction means is determined. Request generation means;

An operation determining unit that selects a specific operation from the request queue based on a predetermined criterion, and determines an operation to be performed next by the recording / reproducing unit, wherein the predetermined criterion is: The data capacity is'. AV stream recording that has reached a predetermined threshold monitored by

4. The AV stream recording / reproducing apparatus according to claim 3, wherein the predetermined threshold value changes according to a data writing speed to the recording buffer or a reproduction speed of data reproduced from the reproduction buffer.

5. There are a plurality of the recording buffer and the Z or the reproduction buffer,

The reading operation from the recording buffer and the writing operation to Z or the reproduction buffer are performed in parallel according to the number of the recording buffer or the reproduction buffer.

The AV stream recording / reproduction according to claim 3, wherein the predetermined threshold value decreases as the number of the recording buffer or the reproduction buffer increases.

6. Recording / playback means for performing a plurality of types of recording / playback operations on AV streams.

An operation determining unit that selects a specific operation from the request queue based on a predetermined criterion, and determines an operation to be performed next by the recording / reproducing unit, wherein the predetermined criterion is the writing speed or the reproduction. An AV stream record indicating whether the speed has reached a predetermined threshold value monitored by the request generation means. ':

55

7. The plurality of types of recording / playback operations include reading an AV stream from the recording buffer, writing an AV stream to the playback buffer, and performing special playback of an AV stream to the playback buffer. 7. The AV stream recording / reproducing apparatus according to claim 1, which has at least writing. '

8. The memory means further includes a system information buffer for reading or writing system information related to the AV stream. The plurality of types of recording / reproducing operations include reading the system information from the system information buffer. 8. The AV stream recording / reproducing apparatus according to claim 1, further comprising writing.

9. The AV stream recording / reproducing apparatus according to claim 1, wherein the priority is determined based on a relative importance of the plurality of types of recording / reproducing operations.

10. The AV stream recording / reproducing apparatus according to claim 1, wherein the priority is such that at least reading of the AV stream from the recording buffer is performed with the highest priority.

11. While recording the AV stream continuously, system information for processing the AV stream of a predetermined data amount as an object is recorded during the recording of the AV stream. Recording means for recording discontinuously so as to correspond to the AV stream;

The system information held in the recording means, and matching means for matching the AV stream recorded in the recording means,

When the recording operation of the recording unit is aborted, the matching unit includes the system information held in the recording unit, and the contents of the system information. An AV stream recording device that associates the AV stream with the object.

12. While continuously recording the AV stream, system information for processing the AV stream having a predetermined data amount as an object is stored during the recording of the AV stream. Recording means for recording discontinuously so as to correspond to the recorded AV stream;

The system information, and matching means for matching the AV stream recorded in the recording means,

When the recording operation of the recording unit is aborted, the matching unit refers to the AV stream and the system information that have been recorded in the recording unit, and detects a recording end of the AV stream, An AV stream recording apparatus that associates the AV stream up to the recording end with the contents of the system information as the object.

13. The AV stream has an identifier for maintaining continuity of the content of the AV stream,

13. The AV stream recording device according to claim 12, wherein the matching unit determines continuity of the contents of the AV stream with reference to the identifier.

14. The AV stream has time information for maintaining continuity of the AV stream,

13. The AV stream recording device according to claim 12, wherein the matching unit refers to the time information to determine continuity of the AV stream.

15. The aligning means, when the recording means resumes recording of the data at the time of the abortion after the abortion, rewrites the contents of the system information of the object which can be processed, thereby rewriting the contents of the object. 13. The AV stream recording device according to claim 11, wherein the AV stream recording device is updated so as to include the post-abortion data.

16 6. A recording / reproducing process for performing a plurality of types of recording / reproducing operations related to the AV stream;

An operation determining step of selecting a specific operation from a queue of the requests based on a predetermined criterion and determining an operation to be performed next by the recording / reproducing means, wherein the predetermined criterion is An AV stream recording / reproducing method that has a priority determined according to the type.

17. A recording / reproducing process for performing a plurality of types of recording / reproducing operations on the AV stream;

By monitoring whether the amount of data read from the recording buffer or the amount of data written to the reproduction buffer reaches a predetermined threshold, a predetermined type of operation request executed by the recording / reproduction process is determined. Request generation process,

An operation determining step of selecting a specific operation from the request queue based on a predetermined criterion and determining an operation to be performed next in the recording / reproducing step. An AV stream recording / reproducing method, which is for determining whether or not a data capacity has reached a predetermined threshold value monitored by the request generation step.

18. A recording / reproducing process for performing a plurality of types of recording / reproducing operations on an AV stream; A memory step of temporarily recording the AV stream using at least a playback buffer and a recording buffer for the AV stream;

An operation determining step of selecting a specific operation from the request queue based on a predetermined criterion and determining an operation to be performed next in the recording / reproducing step, wherein the predetermined criterion is the read speed or An AV stream recording / reproducing method for determining whether a writing speed has reached a predetermined threshold value monitored by the request generation means.

19. While recording the AV stream continuously, system information for processing the AV stream having a predetermined data amount as an object is recorded during the recording of the AV stream. A recording step of discontinuously recording to correspond to the AV stream;

When the recording operation of the recording step is aborted, the matching step is an AV stream that associates the system information held in the recording step with the AV stream of the system information as the object. Trim recording method.

20. While recording the AV stream continuously, system information for processing a predetermined amount of the AV stream as an object is recorded during the recording of the AV stream. AV Story A recording step of recording discontinuously so as to correspond to a stream, and a matching step for obtaining consistency between the system information and the AV stream recorded in the recording step.

In the matching step, when the recording operation of the recording step is aborted, the recording end of the AV stream is referred to by referring to the AV stream and the system information recorded by the recording step. An AV stream recording method for detecting the AV stream up to the end of the recording and associating the content of the system information with the content of the system information as the object.

21. The AV stream recording / reproducing apparatus according to claim 有する, comprising: recording / reproducing means for performing a plurality of types of recording / reproducing operations on the AV stream; and at least a reproduction buffer for the AV stream and a recording buffer. Memory means,,

A request generation unit for monitoring the memory unit and issuing a predetermined type of operation request to be executed by the recording / reproduction unit; and selecting a specific operation from a queue of the request based on a predetermined criterion. A program for causing a computer to function as all or part of an operation determining unit that determines an operation to be performed next by a reproducing unit.

22. The AV stream recording / reproducing apparatus according to claim 3, wherein the recording / reproducing means for performing a plurality of types of recording / reproducing operations related to the AV stream, at least a reproducing buffer for the AV stream and a recording buffer. A memory unit having the following configuration: monitoring whether a capacity of data read from the recording buffer or a capacity of data written to the reproduction buffer reaches a predetermined threshold value; Request generation means for making a predetermined type of operation request, and operation determination means for selecting a specific operation from a queue of the requests based on a predetermined criterion, and determining the next operation to be performed by the recording / reproducing means. To make the computer function as all or part of Fu. Mouth g.

23. The AV stream recording / reproducing apparatus according to claim 6, wherein the recording / reproducing means for performing a plurality of types of recording / reproducing operations relating to the AV stream, and at least a reproduction buffer and a recording buffer for the AV stream are provided. A memory means having the data read / write speed for reading data from the recording buffer or a write speed of data to the reproduction buffer for monitoring a predetermined threshold value; A request generation means for making a type of operation request, and an operation determination for selecting a specific operation from a queue of the requests based on a predetermined criterion and determining an operation to be performed next by the recording / reproducing means. A program that causes a computer to function as all or part of the means.

24. The AV stream recording apparatus according to claim 11, wherein system information for continuously recording the AV stream and processing the AV stream having a predetermined data amount as an object is stored in the AV stream recording apparatus. During recording of the stream, recording means for discontinuously recording so as to correspond to the AV stream recorded so far, the system information held in the recording means, and the recording means recorded in the recording means. And a program for causing a computer to function as all or a part of matching means for obtaining consistency with the AV stream. .

25. The AV stream recording apparatus according to claim 12, wherein the system information for continuously recording the AV stream and processing the AV stream having a predetermined data amount as an object is stored in the AV stream recording apparatus. Recording means for recording discontinuously during recording of the AV stream so as to correspond to the previously recorded AV stream;

As a whole or a part of the matching unit for matching the system information with the AV stream recorded in the recording unit, Program to make the data work.

26. The AV stream recording / reproducing apparatus according to claim 1, comprising a recording / reproducing means for performing a plurality of types of recording / reproducing operations on the AV stream, and at least a reproducing buffer for the AV stream and a recording papper. Memory means,

A request generation unit for monitoring the memory unit and issuing a predetermined type of operation request to be executed by the recording / reproduction unit; and selecting a specific operation from a queue of the request based on a predetermined criterion. A medium carrying a program for causing a computer to function as all or a part of an operation determining means for determining an operation to be performed next by a reproducing means, and which can be processed by the computer.

27. The AV stream recording / reproducing apparatus according to claim 3, wherein the recording / reproducing means for performing a plurality of types of recording / reproducing operations related to the AV stream, and at least a reproducing buffer and a recording buffer for the AV stream are provided. The recording / reproducing means executes the process by monitoring whether or not the memory means having the data capacity read out from the recording buffer or the capacity of the data written in the reproduction buffer reaches a predetermined threshold value. Request generating means for performing a predetermined type of operation request; and operation determining means for selecting a specific operation from a queue of the request based on a predetermined criterion and determining an operation to be performed next by the recording / reproducing means. A medium that carries a program for causing a computer to function as all or part of the above, and that can be processed by a computer.

28. The AV stream recording / reproducing apparatus according to claim 6, wherein self-recording / reproducing means for performing a plurality of types of recording / reproducing operations on the AV stream; A memory means having a recording buffer; a reading speed of data from the recording buffer; or A request generation unit that performs a predetermined type of operation request executed by the recording and reproduction unit by monitoring whether a writing speed of data to the reproduction buffer reaches a predetermined threshold; and Based on a predetermined standard, a specific operation is selected, and the operation determining means for determining the next operation to be performed by the recording / reproducing means is a part or a part of a program for causing the T computer to function. A supported medium that can be processed by a computer.

29. The AV stream recording apparatus according to claim 11, wherein system information for continuously recording the AV stream and processing the AV stream having a predetermined data amount as an object is stored in the AV stream recording apparatus. During the recording of the stream, recording means for discontinuously recording so as to correspond to the AV stream recorded so far, the system information held in the recording means, and recording in the recording means A medium for storing a program for causing a computer to function as all or a part of matching means for obtaining consistency with the AV stream, wherein the medium can be processed by the computer.

'30. The AV stream recording apparatus according to claim 12, wherein the system information for continuously recording the AV stream and processing the AV stream having a predetermined data amount as an object is provided. Recording means for recording discontinuously during recording of the AV stream so as to correspond to the previously recorded AV stream;

A medium carrying a program for causing a computer to function as all or part of the system information and matching means for matching the AV stream recorded on the recording means, comprising: Media that can be processed by