WO2002037490A1 - Dispositif de reproduction et d'enregistrement d'une sequence audiovisuelle, dispositif d'enregistrement d'une sequence audiovisuelle, procede de reproduction et d'enregistrement d'une sequence audiovisuelle et procede d'enregistrement d'une sequence audiovisuelle - Google Patents

Dispositif de reproduction et d'enregistrement d'une sequence audiovisuelle, dispositif d'enregistrement d'une sequence audiovisuelle, procede de reproduction et d'enregistrement d'une sequence audiovisuelle et procede d'enregistrement d'une sequence audiovisuelle Download PDF

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Publication number
WO2002037490A1
WO2002037490A1 PCT/JP2001/009467 JP0109467W WO0237490A1 WO 2002037490 A1 WO2002037490 A1 WO 2002037490A1 JP 0109467 W JP0109467 W JP 0109467W WO 0237490 A1 WO0237490 A1 WO 0237490A1
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WO
WIPO (PCT)
Prior art keywords
recording
stream
buffer
reproducing
system information
Prior art date
Application number
PCT/JP2001/009467
Other languages
English (en)
Japanese (ja)
Inventor
Kazuhiro Mihara
Shinichirou Takigawa
Yoshiki Kuno
Junichi Komeno
Toshikazu Koudo
Original Assignee
Matsushita Electric Industrial Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Publication of WO2002037490A1 publication Critical patent/WO2002037490A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
    • G06F3/061—Improving I/O performance
    • G06F3/0613—Improving I/O performance in relation to throughput
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
    • G06F3/0655—Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
    • G06F3/0656—Data buffering arrangements
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
    • G06F3/0655—Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
    • G06F3/0659—Command handling arrangements, e.g. command buffers, queues, command scheduling
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
    • G06F3/0671—In-line storage system
    • G06F3/0673—Single storage device
    • G06F3/0674—Disk device
    • G06F3/0676—Magnetic disk device
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10527—Audio or video recording; Data buffering arrangements
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10527—Audio or video recording; Data buffering arrangements
    • G11B2020/1062—Data buffering arrangements, e.g. recording or playback buffers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/78—Television signal recording using magnetic recording
    • H04N5/781—Television signal recording using magnetic recording on disks or drums
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
    • H04N9/8042—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components involving data reduction

Definitions

  • 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.
  • 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.
  • 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.
  • 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.
  • 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
  • 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
  • the AV stream input from the outside is input to the memory means 1240, it is once stored in the REC buffer 1242a.
  • 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.
  • the HDD controller for AV recording and playback uses the REC buffer.
  • the HDD controller 122 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.
  • 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.
  • 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.
  • the HDD controller for AV recording and reproduction 1230 issues a read request to the HDD controller 1220.
  • the read request ⁇ is temporarily stored in QUE 1.250.
  • 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.
  • the PLAY buffer 124 When data accumulation continues in the PLAY buffer 1 243a and the PLAY buffer 1243a becomes short, the PLAY buffer 124
  • 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. .
  • 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.
  • 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.
  • 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).
  • the system information is recorded on the medium after the end of the recording / reproducing operation of the AV stream.
  • the AV stream recording / reproducing device is as described above. There were, however, the following issues.
  • 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 ⁇ 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.
  • the system information was recorded on the media.
  • 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.
  • system information is recorded periodically at a predetermined timing during recording of an AV stream, the corresponding system information exists at timing 130a ′.
  • system information corresponding to the timing 1300b and system information corresponding to the timing 1300c is recorded periodically at a predetermined timing during recording of an AV stream.
  • 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.
  • 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.
  • 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
  • Request generation means 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 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 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.
  • 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.
  • a fifth aspect of the present invention 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;
  • a request generating means for performing an operation request 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 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.
  • 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.
  • 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.
  • 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.
  • 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;
  • 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.
  • 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.
  • a twelfth aspect of the present invention 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
  • 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.
  • 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.
  • 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 includes a recording / reproducing step of performing a plurality of types of recording / reproducing operations relating to an AV stream;
  • a seventeenth aspect of the present invention includes a recording / reproducing step of performing a plurality of types of recording / reproducing operations relating to an AV stream;
  • a request generation step 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.
  • an eighteenth aspect of the present invention includes a recording / reproducing step of performing a plurality of types of recording / reproducing operations relating to an AV stream,
  • 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 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 matching step for matching the system information held in the recording step with the AV stream recorded in the recording step
  • 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
  • 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.
  • a twenty-first aspect of the present invention 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.
  • 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.
  • a twenty-third aspect of the present invention 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.
  • 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.
  • 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 twenty-sixth aspect of the present invention 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 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 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 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.
  • 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.
  • 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. 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. 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
  • FIG. 1 is a configuration diagram of an AV stream recording / reproducing apparatus according to Embodiment 1 of the present invention.
  • 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
  • the memory unit 140 is an external device.
  • 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.
  • 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
  • the buffer 143 is a means for temporarily recording the AV stream read from the disk device 110 to the outside.
  • 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.
  • 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.
  • 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. .
  • 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.
  • the first priority request (a) issues an AV stream read request from the REC buffer 142 to the HDD controller 120.
  • 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.
  • 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.
  • a request to read data from the system information buffer 141 is set as a third priority request.
  • 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 1 103 ⁇ 4r.
  • 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.
  • 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.
  • 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
  • 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.
  • 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.
  • 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.
  • the request to read data from this system information buffer 141 is set as a third priority request.
  • 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.
  • the HDD controller for AV recording / playback 130 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.
  • 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.
  • 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.
  • 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.
  • the HDD controller for AV recording / reproduction is controlled by an external controller (not shown).
  • 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.
  • 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.
  • 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.
  • FIG. 2 shows a configuration (2) of an AV stream recording / playback apparatus according to Embodiment 2 of the present invention.
  • 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
  • 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.
  • 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
  • the data capacity threshold 300d is set for the PLAY buffer 243b.
  • FIG. 41 is a diagram for explaining states of the P buffer 42 and the PLAY buffer 243.
  • 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
  • the AV stream transmission pointer 320 is a This is a means for monitoring the data capacity of 243.
  • 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.
  • 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).
  • 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 1 ⁇ 0.
  • b is a state where the AV stream is currently being accumulated from outside.
  • 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.
  • 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.
  • “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.
  • 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.
  • 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.
  • 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).
  • 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.
  • 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
  • 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.
  • 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.
  • the AV stream sending pointer 320 moves to the end of the PLAY buffer 243b (the sending direction a in FIG. 3).
  • 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.
  • the AV recording / reproducing HDD controller 210 issues an operation request to the disk device to the QUE 230 with the scheduler.
  • 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.
  • “urgency” is determined based on the amount of data in the PLAY buffer 243.
  • 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.
  • 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.
  • 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.
  • 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 ⁇ is transmitted).
  • 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).
  • 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.
  • FIG. 4 shows a flowchart of the AV stream recording / reproducing apparatus of the present embodiment when the simultaneous recording / reproducing operation is performed.
  • FIG. 4 shows a flowchart of the AV stream recording / reproducing apparatus of the present embodiment when the simultaneous recording / reproducing operation is performed.
  • 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).
  • 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).
  • the data capacity of the REC buffer 242b reaches the threshold value 300b.
  • 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).
  • step 403 determines whether the data capacity of the REC buffer 242b has reached the threshold value 300b based on the reference of the AV stream storage pointer 310.
  • 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).
  • 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).
  • step 404 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). .
  • 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.
  • FIG. 5 is a configuration diagram of an AV stream recording / playback apparatus according to Embodiment 3 of the present invention.
  • 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. .
  • parts common to the second embodiment are omitted, and differences are mainly described.
  • 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.
  • 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
  • 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.
  • 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).
  • the priority of the instruction execution priority scheduler is set as the first priority request.
  • 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.
  • 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.
  • 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.
  • 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.
  • FIG. 6 is a configuration diagram of an AV stream recording / reproducing apparatus according to Embodiment 4 of the present invention.
  • the memory means 640 of the present embodiment is a means provided with a two-channel REC buffer 641 and a ⁇ ⁇ REC buffer 642, and a one-channel PLAY buffer of a PLAY buffer 643.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • FIG. 7A is a diagram schematically showing a change in the threshold value in the REC buffers 641 and 642
  • FIG. 7B is a diagram schematically showing a change in the threshold value in the PLAY buffer 643.
  • 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'.
  • the threshold b when operating on one channel PLAY buffer 643
  • the threshold b when operating on two channels not shown in Figure 6
  • 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.
  • 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.
  • 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.
  • an operation example of the present embodiment will be described with reference to this flowchart.
  • 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.).
  • the QUE 230 with the scheduler 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).
  • step 803 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.
  • the HDD controller 120 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).
  • 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).
  • 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.
  • the HDD controller 120 activates the disk device 110, reads and records the data in the REC buffer 642 (step 808).
  • step 804 determines whether the data capacity of the REC buffer 642a has 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).
  • 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.
  • the HDD controller 120 starts the disk device 110, reads the data, and writes the data to the PLAY buffer 643. Record (step 809).
  • step 805 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).
  • the AV stream recording / reproducing apparatus 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.
  • 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
  • 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.
  • 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.
  • 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.
  • step 1000 it is assumed that the AV stream recording / reproducing device 900 has been turned on from a power-off state (step 1000).
  • 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).
  • 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).
  • step 104 the operation of step 104 will be described in detail.
  • 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.
  • 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. .
  • 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.
  • 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.
  • 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.
  • the FAT information 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.
  • DAU Device Access Unit
  • 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 1
  • the payload 1 120 stores the actual data of the AV stream.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the FAT information merely indicates the recording order of the AV stream on the recording medium, the content itself is not rewritten.
  • 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.
  • the AV stream that has been the target of recording can be added to the recording 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.
  • the system information is periodically recorded in the disk device 910.
  • the present invention is not limited to this.
  • the information may be intermittently recorded in the disk device 910.
  • the system information may be continuously recorded as in the case of the AV stream.
  • 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.
  • 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.
  • 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.
  • 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.
  • the HDD controller 120 and the disk device 110 are examples of the recording / reproducing means of the present invention.c
  • the HDD controller 920 and the disk device 910 are the recording / reproducing means of the present invention. This is an example.
  • the system information-AV file consistency check controller 960 is an example of the consistency means of the present invention.
  • 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.
  • 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.
  • the REC buffers 142, 242, 641, 642, 952, and PLAY buffer of the memory means are provided.
  • 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.
  • the present invention provides the above-described AV stream recording / reproducing apparatus of the present invention.
  • 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.
  • 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.
  • a computer-readable recording medium that records the program of the present invention is also included in the present invention.
  • 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.
  • 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
  • the transmission medium includes transmission media such as the Internet, light, radio waves, and sound waves.
  • 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.
  • the configuration of the present invention may be realized by software or hardware. Industrial applicability
  • 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.
  • 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.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

Un procédé classique de reproduction et d'enregistrement d'une séquence audiovisuelle pose le problème de l'interruption de la séquence audiovisuelle enregistrée ou reproduite entre un tampon et une unité de disque. Dispositif de reproduction et d'enregistrement d'une séquence audiovisuelle comprenant un contrôleur HDD (120) et une unité de disque (110) servant à exécuter une pluralité d'opérations de reproduction et de lecture de séquences audiovisuelles, une mémoire (140) possédant au moins un tampon (142) de reproduction de l'utilisation de la séquence audiovisuelle et un tampon d'enregistrement (141), un contrôleur HDD (130) de reproduction et d'enregistrement audiovisuel servant à contrôler la mémoire (140) et à demander l'exécution par l'unité de disque (110) d'un type d'opération spécifique, ainsi qu'un QUE (150) portant un programmateur afin de sélectionner une opération spécifique dans les files de demande en fonction d'une référence spécifique afin de déterminer l'opération suivante devant être exécutée par l'unité de disque (110), cette référence spécifique consistant en un ordre de priorité déterminé selon un type d'opération d'enregistrement ou de reproduction.
PCT/JP2001/009467 2000-10-30 2001-10-29 Dispositif de reproduction et d'enregistrement d'une sequence audiovisuelle, dispositif d'enregistrement d'une sequence audiovisuelle, procede de reproduction et d'enregistrement d'une sequence audiovisuelle et procede d'enregistrement d'une sequence audiovisuelle WO2002037490A1 (fr)

Applications Claiming Priority (2)

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JP2000-331516 2000-10-30
JP2000331516 2000-10-30

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WO2002037490A1 true WO2002037490A1 (fr) 2002-05-10

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111416954A (zh) * 2019-01-07 2020-07-14 深圳声联网科技有限公司 一类音视频回溯录制方法及无线监护系统

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JPH05307834A (ja) * 1992-05-01 1993-11-19 Victor Co Of Japan Ltd バッファメモリ装置
JPH06195178A (ja) * 1991-11-19 1994-07-15 Adaptec Inc ページモードバッファコントローラ及び構造
JPH0854990A (ja) * 1994-08-09 1996-02-27 Matsushita Electric Ind Co Ltd 動画像情報提供装置
JPH09134573A (ja) * 1995-10-30 1997-05-20 Samsung Electron Co Ltd Ｃｄ−ｒｏｍ駆動システムのメモリ制御回路及びその方法
JPH1097492A (ja) * 1996-06-24 1998-04-14 Samsung Electron Co Ltd メモリアクセスのための優先順位制御装置及び方法
JPH10222929A (ja) * 1997-01-21 1998-08-21 Samsung Electron Co Ltd データ高速伝送のためのシステムデコーダ及びトラックバッファリング制御方法
JPH10275059A (ja) * 1996-04-30 1998-10-13 Matsushita Electric Ind Co Ltd 記憶デバイス制御装置及び管理システム
JPH1169279A (ja) * 1997-06-10 1999-03-09 Matsushita Electric Ind Co Ltd 記録再生装置
JP2000224549A (ja) * 1999-01-27 2000-08-11 Matsushita Electric Ind Co Ltd データ転送制御方法及びその装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06195178A (ja) * 1991-11-19 1994-07-15 Adaptec Inc ページモードバッファコントローラ及び構造
JPH05307834A (ja) * 1992-05-01 1993-11-19 Victor Co Of Japan Ltd バッファメモリ装置
JPH0854990A (ja) * 1994-08-09 1996-02-27 Matsushita Electric Ind Co Ltd 動画像情報提供装置
JPH09134573A (ja) * 1995-10-30 1997-05-20 Samsung Electron Co Ltd Ｃｄ−ｒｏｍ駆動システムのメモリ制御回路及びその方法
JPH10275059A (ja) * 1996-04-30 1998-10-13 Matsushita Electric Ind Co Ltd 記憶デバイス制御装置及び管理システム
JPH1097492A (ja) * 1996-06-24 1998-04-14 Samsung Electron Co Ltd メモリアクセスのための優先順位制御装置及び方法
JPH10222929A (ja) * 1997-01-21 1998-08-21 Samsung Electron Co Ltd データ高速伝送のためのシステムデコーダ及びトラックバッファリング制御方法
JPH1169279A (ja) * 1997-06-10 1999-03-09 Matsushita Electric Ind Co Ltd 記録再生装置
JP2000224549A (ja) * 1999-01-27 2000-08-11 Matsushita Electric Ind Co Ltd データ転送制御方法及びその装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111416954A (zh) * 2019-01-07 2020-07-14 深圳声联网科技有限公司 一类音视频回溯录制方法及无线监护系统

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