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WO2001080240A1 - Dispositif de controle de disques, procede de controle de disques et unite de disques - Google Patents

Dispositif de controle de disques, procede de controle de disques et unite de disques Download PDF

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Publication number
WO2001080240A1
WO2001080240A1 PCT/JP2001/003340 JP0103340W WO0180240A1 WO 2001080240 A1 WO2001080240 A1 WO 2001080240A1 JP 0103340 W JP0103340 W JP 0103340W WO 0180240 A1 WO0180240 A1 WO 0180240A1
Authority
WO
WIPO (PCT)
Prior art keywords
area
recording area
recording
disk
audio data
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2001/003340
Other languages
English (en)
Japanese (ja)
Inventor
Takumi Kinoshita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
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 WO2001080240A1 publication Critical patent/WO2001080240A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
    • G11B27/036—Insert-editing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
    • G11B27/034—Electronic editing of digitised analogue information signals, e.g. audio or video signals on discs

Definitions

  • Disk control device Disk control method, and disk device
  • the present invention relates to a disk control device, a disk control method, and a disk device.
  • the present invention introduces area management information (file system) that logically manages a recording area of video and audio data and enables partial deletion
  • the present invention relates to a disk control device, a disk control method, and a disk device that reproduce data as logically continuous data even in a region that has been partitioned. Background art
  • the disk device has area management information for managing the video and audio data recorded on the disk, and manages the above-mentioned video and audio data when recording the video and audio data or when the editing operation is completed.
  • Area management information is recorded on the disc. Also, by operating the area management information, unnecessary portions of the video / audio data are deleted so that the recording area can be physically played back and played back as continuous data during playback. Video and audio during recording as unrecorded area Data can be recorded.
  • an object of the present invention is to provide a disk control device, a disk control method, and a disk device in which frame drop does not occur. Disclosure of the invention
  • the disk control device includes an interface means for transmitting / receiving a signal to / from an external device, and a video / audio signal received from the external device when the interface means receives a recording start request.
  • Storage means for storing the data and the video / audio data from the external disk device when a playback start request is received; and the video / audio data stored by the storage means being recorded.
  • Data recording / reproducing means for reproducing the video / audio data
  • a video / audio data management means for issuing a recording / retrieving request of the video / audio data to the data recording / reproducing means, the data recording / reproducing means and the video / audio data
  • area management information management means for managing area management information of the video and audio data sent from the management means.
  • the area management information management means removes a part of the recording area of the continuous video / audio data and physically reduces the recording area; when the recording area is divided and becomes discontinuous; the reduced recording area is moved; A part of the recording area for continuous audio and video data is deleted and When an unrecorded area which is divided into small parts is generated, the unrecorded area is moved.
  • unnecessary portions can be deleted from video and audio data that has been recorded once, video and audio data excluding the deleted portions can be treated as continuous data during playback, and the deleted area can be re-created. It can be used as an area for recording.
  • the disk control device is the disk control device according to claim 1, wherein the area management information management means physically stores the recorded area or the unrecorded area. It is characterized by managing with address and logical address.
  • the disk control device is the disk control device according to claim 1, wherein the area management information management means manages each of the recorded areas or the unrecorded areas respectively. It is characterized by the numbering and management of numbers from 1 to N. : '
  • a disk controller according to claim 4 of the present invention is the disk controller according to claim 1, wherein the area management information management means has an area management information table. Things.
  • the disk control device is the disk control device according to claim 4, wherein the area management information table includes a recording / reproduction area information table and a recording area management table. It is characterized by comprising an information table and an unrecorded area management information table. .
  • ADVANTAGE OF THE INVENTION According to this invention, management of each recording area and unrecorded area can be made easy, and the operation of recording / reproduction can be started accurately in a short time.
  • a disk control device is the disk control device according to claim 1, wherein a part of a recording area of continuous video and audio data is deleted.
  • the above area management information management means divides the small divided recording area into a front recording area: ⁇ after, or before a rear recording area, or a division. And move them to both.
  • the video and audio data is moved to a recording area before and after the small recording area where a frame drop may occur at the next reproduction. It can be read from a continuous area on the disc during playback.
  • the area management information management means moves the end portion of the front recording area to the unrecorded area in front of the small divided recording area, or reduces the size of the recorded data.
  • Area (3 ⁇ 4It is characterized by moving to the beginning of the rear recording area in the rear unrecorded area!).
  • the minimum necessary video and audio data is moved from the recording area before and after to a small recording area where a frame drop may occur in the next playback. By doing so, it is possible to continuously extract video and audio data from the disk by increasing the small recording area.
  • the disk control device is the disk control device according to claim 1, wherein a part of a recording area of continuous video / audio data is deleted, and the recording area is physically Is it divided into small pieces and discontinuous?
  • the area management information management means moves necessary frames from the end of the entire R area and the end of the front recording area to a large unrecorded area.
  • the required frame: ⁇ is moved to a large unrecorded area from the entire recording area and the beginning of the rear recording area.
  • the minimum required video and audio data from the recording areas before and after the small recording area where a frame drop is likely to occur in the next reproduction is performed.
  • the small recorded area can be enlarged and video and audio data can be extracted from the disc as continuously as possible.
  • the area management information management means moves the necessary frame from the beginning of the rear recording area to the front and back to the small divided unrecorded area, or is divided into small pieces. It is characterized in that necessary frames are moved from the end of the front recording area to the rear recording area to the unrecorded area.
  • a disk control device is the disk control device according to claim 1, wherein a part of a recording area for continuous video and audio data is deleted, and When a small divided unrecorded area occurs, the area management information management means sets the end part of the front recording area for the small divided unrecorded area and the necessary frame at the head part of the rear recorded area. Or moving the head of the rear recording area with respect to an unrecorded area divided into small pieces and moving the necessary frame to the end of the front recording area. ,
  • the video and audio data when the video and audio data is partially deleted, necessary video and audio data is recorded before and after the recording area from a recording area before and after a small unrecorded area where a frame drop may occur in the next recording.
  • By moving it it is possible to extend the small unrecorded area and write it as continuously as possible when storing video and audio data on the disc.
  • a disk control device is the disk control device according to claim 1, wherein a part of a recording area for continuous video and audio data is deleted, and When a small undivided unrecorded area occurs, the area management information management unit moves the end of the front recording area to the small undivided unrecorded area and moves the necessary frame to the large unrecorded area. Or the head of the rear recording area for the unrecorded area divided into Is moved.
  • the necessary video and audio data from the recording area before and after the unrecorded area is large and unrecorded, which may cause a frame drop in the next recording.
  • the video can be written as continuously as possible when expanding the small unrecorded area and storing video and audio data on the disc.
  • the disk control device according to claim 12 of the present invention is ';'.
  • a disk control device using a magnetic disk drive can be obtained.
  • the disk controller according to claim 13 of the present invention is the disk controller according to any one of claims 1 to 11, wherein the disk is a magneto-optical disk. It is a disk.
  • a disk control device using a magneto-optical disk drive can be obtained.
  • an interface process for transmitting / receiving a signal to / from an external device, and receiving the signal from the external device when the interface unit receives a recording start request.
  • the storage processing for storing the video and audio data from the external disk device, and the video and audio data stored by the storage means are recorded.
  • the area management information management processing when a part of the recording area of the continuous video / audio data is deleted and the recording area is physically divided into small pieces and becomes discontinuous, the reduced recording area is moved. A part of the recording area of continuous video and audio data was deleted, and an unrecorded area that was physically small and divided occurred ⁇ , move the above unrecorded area Special feature:
  • unnecessary portions are deleted from video and audio data once recorded, video and audio data excluding the deleted portions can be treated as continuous data at the time of reproduction, and the deleted area is recorded again. Can be used as an area for
  • the disk control method according to claim 15 of the present invention is the disk control method according to claim 14, wherein in the area management information management processing, the recording area or the unrecorded area is It is specially designed to manage data using logical and logical addresses.
  • the disk control method according to claim 16 of the present invention is the disk control method according to claim 14, wherein in the area management information management processing, each of the recording areas or the unrecorded areas is recorded. It is characterized in that areas are numbered and managed from 1 to N respectively.
  • a disk control method according to claim 17 of the present invention is characterized in that, in the disk control method according to claim 14, the area management information management processing includes an area management information table.
  • the disk control method according to claim 18 of the present invention is the disk control method according to claim 17, wherein in the area management information management processing, the area management information table includes a recording / reproducing area. It is characterized by comprising an information table, a recording area management information table, and an unrecorded area management information table.
  • a disk control method is the disk control method according to claim 14, wherein a part of the recording area of the continuous video / audio data is deleted and the recording area is physically If the recording area is divided into smaller pieces and becomes discontinuous, the above-mentioned area management information management process divides the smaller divided recording area after the front recording area, before the rear recording area, or by dividing both. It is characterized by moving.
  • a small recording area where a frame drop is likely to occur is moved to a recording area before and after the small recording area, so that a video and audio data can be reproduced on a disc. Can be read from the continuous area.
  • a disc control method according to claim 20 of the present invention in the disc control method according to claim 14, wherein a part of a recording area for continuous video / audio data is deleted and the recording area is physically
  • the unrecorded area in front of the smaller divided recording area is moved to the end of the front recording area, or the reduced recording is performed. It is characterized in that a movement is made to a start end portion of the rear recording area to an unrecorded area behind the area.
  • the minimum necessary video and audio data is moved from the recording area before and after to the small recording area where a frame drop may occur, thereby reducing the size.
  • video and audio data can be continuously extracted from the disc.
  • a disc control method is the disc control method according to claim 14, wherein a part of the recording area of the continuous video / audio data is deleted and the recording area is physically If the data is divided into smaller pieces and become discontinuous, the above area management information management process moves the entire divided S area and the required frame from the end of the front recording area to the larger unrecorded area. Or moving the necessary frames from the start end of the entire recording area and the rear recording area into a large unrecorded area.
  • the minimum necessary video and audio data is added to the small recording area where frame drop is likely to occur from the recording areas before and after the small recording area, and the unrecorded area is By moving it, the recording area is enlarged and the recording area is enlarged, and video and audio data is taken out from the disc as continuously as possible; Can be.
  • a disk control method according to claim 22 of the present invention is the disk control method according to claim 14, wherein a part of a recording area for continuous video and audio data is deleted and the disk control method is physically reduced.
  • a necessary frame is moved from the head of the rear recording area to the front recording area to the small divided unrecorded area, or It is characterized in that a necessary frame is moved from the end of the front recording area with respect to the rear recording area to a small divided unrecorded area.
  • a disk control method is the disk control method according to claim 14, wherein a part of the recording area of the continuous video and audio data is deleted, and the disk control method is physically reduced.
  • the area management information management process sets the end of the front recording area for the small divided unrecorded area to the frame required for the beginning of the rear recording area. It is characterized by moving or moving the head of the rear recording area to the end part of the front recording area by the necessary frame for the small undivided unrecorded area.
  • a disk control method is the disk control method according to claim 14, wherein a part of the recording area of the continuous video / audio data is deleted, and the disk control method is physically smaller.
  • the area management information management process moves the end of the front recording area to the smaller divided unrecorded area, and moves the required frame to the larger unrecorded area. It is characterized in that the leading part of the rear recording area is moved by a necessary frame to the large unrecorded area with respect to the unrecorded area divided into small pieces.
  • the present invention when the video and audio data is partially deleted, there is a possibility that a frame drop may occur. In this way, when saving the video and audio data to the disk by expanding the small unrecorded area, the data can be written as continuously as possible.
  • the disk control method according to claim 25 of the present invention is the disk control method according to any one of claims 14 to 24, wherein the disk is It is a magnetic disk. According to the present invention, a disk control method using a magnetic disk drive can be obtained.
  • the disk control method according to claim 26 of the present invention is the disk control method according to any one of claims 14 to 24, wherein the disk is It is a magneto-optical disk. J
  • a disk control method using a magneto-optical disk drive can be obtained.
  • a disk device includes the disk control device according to any one of claims 1 to 13.
  • ADVANTAGE OF THE INVENTION According to the present invention, a function of deleting a part of video and audio data is realized by area management of video and audio data, and a disk device which does not cause a frame drop at the time of reproduction / recording in a physically small divided area is obtained. be able to. Brief description of the drawings ''
  • FIG. 1 is a block diagram for explaining a disk control device according to a first embodiment of the present invention.
  • FIG. 2 is a diagram for explaining the structure of video and audio data and area management information recorded on the disk device according to the first embodiment of the present invention.
  • FIG. 3 is a diagram showing a relationship between a physical frame address and a logical frame address according to the first embodiment of the present invention.
  • FIG. 4 is a diagram showing an example of area management information stored in an area management information area in the disk device according to the first embodiment of the present invention.
  • FIG. 5 is a diagram for explaining a ring buffer at the time of data recording of the disk control device according to the first embodiment of the present invention. :
  • FIG. 6 is a diagram for explaining a ring buffer at the time of data reproduction of the disk control device according to the first embodiment of the present invention.
  • FIG. 7 is a flowchart for explaining a next recording LFA calculation method at the time of recording by the disk control method according to the first embodiment of the present invention.
  • FIG. 8 is a diagram showing an example of moving the small recording area of the disk control device according to the first embodiment of the present invention after the logical front recording area to eliminate the small recording area.
  • FIG. 9 illustrates a small recording area of the disk control device according to the first embodiment of the present invention.
  • FIG. 9 is a diagram showing an example in which a small recording area is eliminated by being moved to the front of a physical rear recording area.
  • FIG. 10 shows a disk control device according to Embodiment 1 of the present invention in which a small recording area is divided and moved after a logical front recording area and before a logical rear recording area
  • FIG. 9 is a diagram illustrating an example of eliminating a small recording area.
  • FIG. 11 is a diagram showing an example in which the end portion of the logical front area is moved physically ahead of the small recording area of the disk control device according to the first embodiment of the present invention to enlarge the small recording area. is there.
  • FIG. 12 shows an example in which the starting point of the logical rear recording area is moved to the rear of the small recording area of the disk control device according to the first embodiment of the present invention to enlarge the small recording area.
  • FIG. 12 shows an example in which the starting point of the logical rear recording area is moved to the rear of the small recording area of the disk control device according to the first embodiment of the present invention to enlarge the small recording area.
  • FIG. 13 shows a case where a necessary recording frame is moved to an unrecorded area from the entire recording area having a small disk control position according to the first embodiment of the present invention and the end of the logical front recording area, and the small recording is performed. It is a figure showing the example which enlarges a field.
  • -FIG. 14 shows a small recording area of the disk control device according to the first embodiment of the present invention, in which the necessary frames are moved from the beginning of the logical rear recording area to the unrecorded area. It is a figure showing the example which enlarges a field.
  • FIG. 15 shows a case where a necessary frame is moved from the head of the logical rear recording area to the physical front recording area to the small unrecorded area of the disk control device according to the first embodiment of the present invention.
  • FIG. 10 is a diagram showing an example of eliminating an unrecorded area of less than 10 frames.
  • FIG. 16 shows a case where necessary frames are moved from the end of the logical front recording area to the physical rear recording area to the small unrecorded ⁇ S area of the disk control device according to the first embodiment of the present invention.
  • FIG. 9 is a diagram showing an example of eliminating an unrecorded area of less than 10 frames.
  • FIG. 17 shows a frame required for a small unrecorded ⁇ g area of the disk control device according to the first embodiment of the present invention, with the end portion of the physical front recording area at the beginning of the logical rear recording area.
  • FIG. 9 is a diagram showing an example in which an unrecorded area of less than 10 frames is eliminated by moving the minutes.
  • FIG. 18 is a diagram showing an example in which the head of the physical rear recording area for the small unrecorded area of the disk control device according to the first embodiment of the present invention is replaced with the frame required for the end of the logical front recording area. The following shows an example of moving the to eliminate the unrecorded area of less than 10 frames FIG.
  • FIG. 19 is a diagram illustrating a disk control device according to the first embodiment of the present invention in which the end portion of the physical front recording area is moved to the small unrecorded area, and the necessary frame is moved to the large unrecorded area.
  • FIG. 11 is a diagram showing an example of eliminating an unrecorded area of less than 10 frames.
  • FIG. 20 shows the disk control apparatus according to Embodiment 1 of the present invention in which the head of the physical rear recording area is moved relative to the small unrecorded area and the necessary frame is moved to the large unrecorded area.
  • FIG. 4 is a diagram showing an example of eliminating an unrecorded area of less than 10 frames.
  • FIG. 21 is a block diagram for explaining a disk drive according to Embodiment 2 of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1 is a block diagram for explaining a disk control device 100 according to Embodiment 1 of the present invention.
  • the disk controller 100 includes an I ⁇ 1394 path 101 for transferring a video / audio signal and a control signal (command) from an external device such as a digital VCR and the IEEE 1394 path. 1 3 9 4 External interface means 102 for transmitting / receiving a digital signal to / from an external device via path 101, and when the interface means 102 receives a recording start request, DV received from the external device. Formatted audio and video data
  • DV data (Hereinafter abbreviated as DV data).
  • a ring buffer 103 for storing video and audio data from the disk device, and a DV on the ring buffer 103 are stored.
  • Data recording / reproducing means 104 for recording data and reproducing DV data from the external disk device 105, and video / audio for issuing a request for storing or retrieving DV data to the data recording / reproducing means 104.
  • Area management information management means 10 for managing the area management information of the DV data sent from the data management means 106, the data recording / reproduction means 104, the video / audio data management means 106, and the like. It consists of seven.
  • an external disk It is assumed that a hard disk device (HDD) having an IDE interface is used as the device 105.
  • the recording area of the hard disk drive is managed on a sector basis with 512 bytes as one sector, and a logical block address (LBA) is assigned to each sector. ;
  • FIG. 2 is a diagram for explaining the structure of video / audio data and area management information recorded on the disk device according to the first embodiment of the present invention.
  • the first area (area with a small LBA) of the disk recordable area of the disk device 105 is allocated as an area management information area, and the remaining area is allocated as a DV data recordable area as an area for recording DV data.
  • the frame address (FA) is assigned from 0 in the DV data frame unit. This frame address is called a physical frame address (PFA) and is fixedly allocated on the HDD.
  • PFA physical frame address
  • LFA logical frame address
  • the positions on the disk device 105 are different even if the LFA and the PFA are the same.
  • FIG. 3 is a diagram showing a relationship between a physical frame address and a logical frame address according to the first embodiment of the present invention.
  • Fig. 3 shows a case where 1001 frames from 0 to 1000 are recorded and 200 frames from LFA 401 to 200 are deleted.
  • the recording area is divided into two, but LFA is from 0. It is continuously re-rolled up to 800.
  • additional recording is performed, and after 1101 frames are recorded, after 200 frames from LFA 651 are partially deleted, there are three recorded areas and three unrecorded areas.
  • when additional recording is performed if all the video and audio data are recorded in the unrecorded area 1, then the video and audio data are recorded in the area indicated by the unrecorded area 2.
  • FIG. 4 is a diagram showing an example of area management information stored in an area management information area in the disk device according to the first embodiment of the present invention.
  • the area management information includes recording / playback area information, recording area management information, and unrecorded area management information. There are three reports. :
  • the recording / reproducing area information includes a recording start logical frame address indicating a position where the DV data to be recorded next is stored, a reproduction start logical frame address indicating a position where the next DV data to be reproduced is stored, and recording. There is a final recording logical frame address indicating the top of the DV data recorded, and the total number of recordable frames indicating the number of frames recordable on the disk device.
  • the recording area management information includes a start physical frame address and an end physical frame address of the area n. n is in order from 1. When playing back the recorded DV data, the DV data in the area 1 is played back, and then the areas 2, 3, ... are played back in order. L F A is also assigned in order from region 1.
  • the unrecorded area management information includes the start physical frame address of the area n and the end physical frame address. n is in order from 1, and when recording DV data, the DV data is written to the area on the disk corresponding to the area 1, and the start physical frame address of the area 1 is incremented by one. At that time, if it is the same as the end physical frame address, the area 1 area has been lost, so the area 2 PFA is copied to area 1 and the area 3 PFA is copied to area 2 and the necessary area data is copied. Offset the next DV data recording to the new area 1.
  • the operation of the disk control device according to the first embodiment can be broadly divided into four operations of a recording processing operation, a reproducing processing operation, a partial deletion command processing operation, and a recording stop command processing operation. The operation will be described.
  • the external interface means 102 is composed of a P HY circuit for controlling the interface of the physical layer, a LINK circuit for controlling the interface of the logical layer, and the like.
  • the DV data received from the external ⁇ is transferred to the ring buffer 103.
  • FIG. 5 is a diagram for explaining a ring buffer at the time of data recording of the disk control device according to the first embodiment of the present invention. .
  • the received DV data is stored in the buffer position indicated by the ISO capture pointer.
  • the IS Is incremented to indicate the buffer.
  • the ISO capture pointer is returned to the highest position.
  • DV data is sent without interruption at a constant rate of 28.8 Mbps. Since it is about 30 frames Z seconds, it takes about 33ms to transfer one frame.
  • the data recording / reproducing means 104 sends the logical frame address to be recorded to the area management information managing means 107, and issues a ring buffer to the data area of the disk device 105 indicated by the physical frame address obtained by issuing the LFA 'PFA conversion request.
  • the DV data on the buffer indicated by the IDE extraction pointer 103 is recorded according to a predetermined procedure. Then, if the IDE fetch pointer exceeds the force buffer that is incremented to point to the next buffer, move the IDE fetch pointer back to the position pointing to the top buffer.
  • the DV data is sent from the external interface means 102 at regular intervals (about 33 ms in the case of DV data), but the data recording / reproducing means 104 records the DV data on the disk device 105 because Disk :
  • writing one frame of data to the disk device 105 takes about 8 ms for an HDD.
  • writing to the disk device 105 is considerably faster than the transfer speed of the DV data sent from the external interface means 102, so that the data which is not transferred to the disk device 105 in the ring buffer DV data is 0 or 1.
  • the recording of DV data is lost when the transfer to the disk device 105 is delayed until the size of the ring buffer becomes full.
  • the ring buffer has a capacity of 11 frames, a margin of about 0.3 seconds occurs at 10X 33ms, and this time absorbs the seek time generated by the disk device 105 and the retry processing time at the time of a write error. it can.
  • random access occurs in all 10 frames or if retry processing occurs somewhat, A situation may occur in which DV data cannot be stored in the disk device.
  • FIG. 7 is a flowchart for explaining a next recording LFA calculation method at the time of recording by the disk control method according to the first embodiment.
  • step S1 If the recording start logical frame address is larger than the total number of recording capability frames in step S1, it is determined that the recording is in the full recording state, and the end of recording is notified to the video / audio data management means 106. If the recording start logical frame address has not reached the total number of recordable frames, the process proceeds to step S2.
  • step S2 If the recording start logical frame address is larger than the final recording logical frame address in step S2, DV data is recorded in an unrecorded area and moved to the recording area as an additional recording mode. To overwrite the DV data in the recording area.
  • the recording start logical frame address is returned to the video / audio data management means 106 in step S10, and the recording start logical frame address is incremented by 1 in step S11. '
  • step S3 when the start physical frame address and the end physical frame address of the area 1 in the unrecorded area management information match in the additional recording mode, the remaining unrecorded frame is 1, so the unrecorded frame is not recorded in step S4.
  • the recording area 1 is deleted, and the subsequent area information is stuffed one by one, and the process proceeds to step S6. If they do not match, the number of remaining unrecorded frames is 2 or more.
  • step S5 the start physical frame address of area 1 in the unrecorded area management information is incremented by one. This operation secures a data area for one frame from the unrecorded area.
  • step S7 is executed to newly add to the recording area, and if not, step S9 is executed to secure an area for one frame to be recorded in the recording area.
  • step S8 the last recording logical frame address is incremented by one.
  • step S9 the ending physical frame address of the last area n valid in the area information in the recording area management information is incremented by 1, and the process proceeds to step S8.
  • step S10 the recording start logical frame address is returned to the video / audio data management means 106, and in step SI1, the recording start logical frame address is incremented by one. -Next, the reproduction processing operation will be described.
  • the external interface means 102 When the external interface means 102 receives a reproduction start request from the IE EE 1394 path 101, the external interface means 102 issues a reproduction start request to the video / audio data management means 106, and transmits the DV data transferred from the data recording / reproduction means 104 to the ring buffer 103. Are sequentially transmitted to the external device via the IEEE1394 path 101.
  • FIG. 6 is a diagram for explaining a ring buffer during data reproduction of the ⁇ disk control device g according to the first embodiment of the present invention.
  • the ISO fetch pointer indicates a different buffer from the IDE fetch pointer in the ring buffer 103 as shown in Fig. 6, it is determined that the DV data not transmitted to the outside is in the buffer.
  • the DV data in the buffer indicated by the ISO extraction pointer is transferred, and the data points to the same position, it is determined that the DV data extraction from the disk device 105 is delayed and one error processing S is performed.
  • Previously transferred Resend DV data.
  • transmission to the external device starts after the DV data is stored in the ring buffer.
  • the ISO fetch pointer of the ring buffer 103 is incremented to indicate the next buffer. At that time, if it exceeds the buffer, return the ISO fetch pointer to the highest position.
  • the video / audio data management means 106 determines whether the ISO fetch pointer and the IDE fetch pointer in the ring buffer 103 do not indicate the same buffer, or immediately after receiving a playback start request. It is determined that there is an empty buffer in the ring buffer 103 and the area management information management means 107 retrieves the next playback LFA A request is issued to obtain the next playback LFA information, and a logical frame address and an IDE capture pointer to be played back are passed to the data recording and playback stage 104, and a DV data removal request is issued. Otherwise, it is determined that the read-ahead of the DV data is fully stored in the ring buffer 103, and the DV data is not extracted from the disk device.
  • the data recording / reproducing means 104 which has received the DV data take-out request sends the logical frame address to be reproduced to the area management information managing means 107, and issues the LFA 'PFA conversion request to issue the disk device 105 indicated by the physical frame address obtained.
  • the DV data is read out from the data area of the ring buffer 103 and stored in the buffer indicated by the IDE capture pointer of the ring buffer 103 in a predetermined procedure. At that time, the IDE capture pointer is incremented to point to the next buffer. If the buffer exceeds the buffer, the IDE capture pointer is returned to the position indicating the highest buffer.
  • the DV data is read from the external interface means 102 at regular intervals (about 33 ms in the case of DV data), but the data recording / reproducing means 104 reads the DV data from the disk device 105
  • the disk unit 1.05 is ready to receive data
  • reading one frame of data from the disk unit takes about 8 ms if the LBA is continuous and the read-ahead cache is valid for HDDs, and about 8 ms if the cache is invalid. Seek time is added.
  • the reading from the disk device is much faster than the transfer rate of the DV data taken out from the external interface means 102, so the ring buffer DV data which has not been transferred to the external interface means 102 is fully read ahead in the buffer.
  • the reproduction of the DV data is lost when reading from the disk device 105 is delayed until the DV data of the ring buffer becomes empty.
  • the ring buffer has a capacity of 11 frames, there is a margin of about 0.3 seconds at 10X 33ms, and this time absorbs the seek time generated by the disk unit 105 and the retry processing time at the time of read error. it can. However, if random access occurs to all of the 10 frames or if some retry processing occurs, DV data may not be read from the disk device.
  • the area management information management means 107 Upon receiving the next playback LFA take-out request, the area management information management means 107 uses the playback start logical frame address shown in FIG. Return to the management means 106 and increment the playback start logical frame address by one. Notice.
  • the external interface means 102 when the external interface means 102 receives a partial deletion request, it issues a partial deletion request to the area management information management means 107.
  • the area management information management means 107 sets the start and end of the recording area management information area n and the area of the unrecorded management information so that the recording area in the partially deleted area becomes an unrecorded area. n Start ⁇ End Change physical frame address.
  • the small recording area may be divided after the logical front recording area, or before the logical rear recording area, or both.
  • the video and audio data can be reproduced without interruption by eliminating the small recording area.
  • the small recording area is set to be less than 10 consecutive frames.
  • FIG. 8 is a diagram showing an example in which the recording area without the disk control device according to the first embodiment is moved after the logical front recording area to eliminate the recording core area of less than 10 frames.
  • the upper three bars are the physical images when moving the recording area
  • the lower left table shows the storage area management information of the physical images by the number of frame addresses.
  • the lower right table shows the non-storage area management information of the physical image by the number of frame addresses.
  • the small recording area ⁇ remaining after the deletion in step 802 is moved to the end of the front recording area ⁇ , To enable continuous reproduction of audio data without interruption.
  • FIG. 9 is a diagram showing an example in which the small recording area of the disk control device according to the first embodiment is moved to the front of the logical rear recording area to eliminate the recording area of less than 10 frames.
  • step 902 After partially deleting the recording area 9 in step 901, the small recording remaining after deletion in step 902
  • the area (2) is moved to the beginning of the recording area (3), which is the backward recording area, so that the video and audio data can be reproduced continuously without interruption.
  • FIG. 10 is a block diagram of the disk control device according to the first embodiment in which the small recording area B is divided and moved after the logical front recording area and before the logical rear recording area, and the 10 FIG. 4 is a diagram showing an example of eliminating a recording area smaller than a recording area.
  • step 1001 after partially deleting the recording area (1) in step 1001, the small recording area (2) remaining after the deletion in step 1002 is divided into two, and the recording area (3) and the recording area are recorded. Move to the beginning of area (2) so that video and audio data can be played continuously without interruption as a new recording area and (recording area).
  • Another method is to move the end of the logical front recording area to the physical front unrecorded area of the small recording area. Move the beginning of the logically backward recording area to the unrecorded area, or physically behind the small recording area! This eliminates the need for a small recording area so that video and audio data can be reproduced without interruption.
  • FIG. 11 shows that the end portion of the logical front area is moved physically ahead of the small recording area of the disk control device according to the first embodiment so that the recording area continues at least 10 frames or more.
  • FIG. 12 shows that the start of the logical rear recording area is moved to the rear of the disk control device according to the first embodiment physically at a position of at least 10
  • FIG. 9 is a diagram showing an example in which frames or more are continuous.
  • a small recording area that may cause frame drop during playback may occur. If this occurs, another method is to move the necessary frames from the end of the entire small recording area and the logical front recording area to the large unrecorded area, or to move the entire small recording area and the logical rear recording area. By moving the necessary frames from the beginning to the large unrecorded area, the small recorded area is eliminated, so that the audio and video data can be reproduced without interruption.
  • FIG. 13 shows that the necessary recording frame is moved to the large unrecorded area by moving the entire small recording area of the disk control device according to the first embodiment and the end of the logical front recording area to the large unrecorded area.
  • FIG. 13 is a diagram showing an example in which 10 or more frames are continuous.
  • the part of the end part of the recording area 1 and the smaller recording area ⁇ after deletion are moved backward in 302, and the video and audio data is interrupted so that the recording area is continuous for 10 frames or more. It can be played continuously without any music.
  • FIG. 14 shows a case where the necessary recording area is moved from the beginning of the logical recording area and the rear end of the logical rear recording area to the large unrecorded area of the disk control device according to the first embodiment, so that the recording area is reduced.
  • FIG. 9 is a diagram showing an example in which at least 10 frames are continuous.
  • the relevant unrecorded area is logically associated with the physical front recorded area.
  • the required frame is moved from the beginning of the proper rear recording area, or the required frame is moved from the end of the logical front recording area to the physical rear recording area to the corresponding unrecorded area. Eliminate small unrecorded areas so that video and audio data are not lost when recording.
  • the small unrecorded area is set to be less than 10 consecutive frames.
  • the first unrecorded area is the start of recording even if it is less than 10 frames. No loss of audio data occurs.
  • FIG. 15 shows a case where necessary frames are moved from the head of the logical rear recording area to the physical front recording area to the small unrecorded area of the disk control device according to the first embodiment
  • FIG. 9 is a diagram showing an example of eliminating an unwritten ⁇ R area of less than 10 frames.
  • FIG. 15 after the partial deletion of the recording area ⁇ was performed in the step 1501, a part of the starting end of the recording area ⁇ was partially deleted in the recording area ⁇ in the step 1502. The video and audio data can be played continuously without interruption.
  • FIG. 16 shows the disk controller according to the first embodiment in which the necessary frame is moved to the small, unrecorded area from the end of the logical front recording area with respect to the physical rear recording area.
  • FIG. 10 is a diagram showing an example of eliminating an unrecorded area of less than 10 frames.
  • a part of the end portion of the recording area ⁇ was partially deleted in the recording area ⁇ in step 1602.
  • the video and audio data can be played continuously without interruption.
  • another method is to add the physical end of the front recorded area to the unrecorded area logically backward. Move the necessary frame to the beginning of the recording area, or move the beginning of the page area physically backward to the corresponding unmarked ⁇ g area to the end of the logical forward recording area. By moving the frame, the small unrecorded area is extended to 10 frames or more to prevent loss of video and audio data when recording.
  • FIG. 17 shows the movement of the end of the physical front recording area and the necessary frame to the beginning of the logical rear recording area for the small unrecorded area of the disk controller according to the first embodiment.
  • FIG. 9 is a diagram showing an example of eliminating an unrecorded area of less than 10 frames.
  • step 1701 after partially deleting the recording area ⁇ , in step 1702, a part of the ending part of the recording area ⁇ is moved to the starting end of the recording area 3.
  • video and audio data can be played continuously without interruption.
  • FIG. 18 is a block diagram of the disk control device according to the first embodiment, in which the head part of the physical rear recording area for the small, unrecorded area is required as the end part of the logical front recording area.
  • FIG. 9 is a diagram showing an example in which an unrecorded area of less than 10 frames is eliminated by moving frames.
  • step 1801 after partially deleting the recording area (1) in step 1801, part of the end of the recording area (3) is moved to the end of recording area (2) in step 1802.
  • video and audio data can be played continuously without interruption.
  • the end portion of the physical front recording area with respect to the corresponding unrecorded area is replaced with a large unrecorded area. Or move the beginning of the physical rear recording area to the corresponding unrecorded area, and move the necessary frame to the larger unrecorded area to reduce the smaller unrecorded area by one. By extending it to 0 frames or more, video and audio data will not be lost during recording.
  • FIG. 19 is a diagram showing an example in which the end portion of the physical front recording area is moved by a necessary frame to the large unrecorded area with respect to the small unrecorded area of the disk control device according to the first embodiment.
  • FIG. 11 is a diagram illustrating an example of eliminating an unrecorded area of less than 0 frame.
  • FIG. 20 shows that the head portion of the physical rear recording area is moved by a necessary frame to the large unrecorded area with respect to the small unrecorded area of the disk control device according to the first embodiment.
  • FIG. 11 is a diagram illustrating an example of eliminating an unrecorded area of less than 0 frame.
  • the video / audio data management means 106 Upon receiving the recording stop request, the video / audio data management means 106 sends an area management information storage request to the area management information management means 107, and the area management information management means 107 records the area management information as data.
  • the data is sent to the reproducing means 104, and the data recording / reproducing means 104 is supplied with the area management information.
  • Information is recorded on the disk device 105. ,:
  • the area management information for logically managing the recording area of the video / audio data is introduced, and the video / audio data is recorded. It is possible to logically delete a part, and when reproducing video and audio data, it is guaranteed that even in physically separated areas, video and audio data can be reproduced without loss like logically continuous data. When recording audio and video data in the deleted area, the video and audio data is recorded without loss even in the physically separated area. Disk control device and disk control realized by area management of image and audio data, so that frame drop does not occur during playback and recording in physically small divided areas The law can be obtained.
  • the present invention may be any disk device, such as a magneto-optical disk device or a random access memory such as a DVD-RAM. ⁇ Similar effects can be obtained by using a device having an access function.
  • connection means between the disk control device 100 and the disk device 105 is shown as a configuration connected by an IDE interface.
  • the interface connecting the two devices is a SCSI interface or the like. Any interface means can be used as long as the interface means can transfer the digital signal of the present invention, and is not limited to the configuration of the first embodiment.
  • the divided small climbing area or unrecorded area is described as 10 frames. However, other small numbers may be used, and the present invention is limited to the configuration of the first embodiment. It is not what is done.
  • FIG. 21 is a block diagram for explaining a disk device 120 according to the second embodiment of the present invention.
  • disk device 120 of the second embodiment those having functions and configurations similar to those of the first embodiment shown in FIG. 1 described above are given the same reference numerals, and description thereof is omitted.
  • the disk device 120 of the second embodiment is the disk control device of the first embodiment. It has a function of 100, and each means in the disk control device of the first embodiment is built in the disk device.
  • a disk device 120 As shown in FIG. 21, a disk device 120 according to the second embodiment has a magnetic disk 111 as a recording medium, and writes and reads digital signals to and from this magnetic disk 111.
  • a magnetic head 1 1 2 is provided inside.
  • the data recording / reproducing means 104 performing data recording / reproducing work on the disk device via the IDE interface is replaced by the magnetic head 112 in the second embodiment. Control of writing and reading of digital signals to and from the magnetic disk 111 is executed.
  • blocks assigned the same reference numerals as those in the first embodiment perform the same processing as in the first embodiment. Therefore, in response to various requests from the external ⁇ connected to the IEEE 1394 path 101, each block in the disk device of the second embodiment executes the same operation as that of the first embodiment. I do.
  • the functions of the disk device 105 according to the first embodiment can be implemented in an electric / electronic circuit.
  • the cost and size of the disk device for recording and reproducing video and audio data are reduced. It is possible to aim at.
  • the disk control device and the disk device in the above embodiment have been described as having a configuration in which the external device is connected via the IEEE1394 path.
  • the path may be any path capable of transmitting and receiving signals, and is not limited to the configuration of the above embodiment.
  • the disk control apparatus As described above, the disk control apparatus, the disk control method, and the disk
  • the recording device is suitable for a data processing device that records and reproduces video and audio data so that frames are not dropped.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Management Or Editing Of Information On Record Carriers (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

L'invention concerne un dispositif de contrôle de disques, un procédé de contrôle de disques et une unité de disques, permettant de mettre en oeuvre une fonction de suppression partielle de données vidéo/vocales et d'éviter toute perte de blocs lors d'une reproduction ou d'un enregistrement depuis/vers une région séparée en petits segments. Un moyen de contrôle des informations de surveillance d'une région, conçu pour contrôler les informations de surveillance d'une région relatives aux données vidéo/vocales, est configuré de manière à déplacer une région d'enregistrement de taille réduite ainsi qu'une région non destinée à l'enregistrement et divisée en petits segments, lorsqu'une partie d'une région d'enregistrement de données vidéo/vocales continues est supprimée pour être divisée en petits segments discontinus.
PCT/JP2001/003340 2000-04-19 2001-04-19 Dispositif de controle de disques, procede de controle de disques et unite de disques Ceased WO2001080240A1 (fr)

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JP2000117982A JP3510998B2 (ja) 2000-04-19 2000-04-19 ディスク制御装置、ディスク制御方法およびディスク装置
JP2000-117982 2000-04-19

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JP2009093691A (ja) * 2007-10-04 2009-04-30 Hitachi Ltd 媒体記録再生装置及び媒体記録再生方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05217288A (ja) * 1992-02-03 1993-08-27 Sharp Corp 情報記録再生装置
JPH0696559A (ja) * 1992-09-11 1994-04-08 Sony Corp 記録装置
EP0778572A2 (fr) * 1995-12-08 1997-06-11 Sony Corporation Appareil d'enregistrement et de reproduction de données et méthodes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05217288A (ja) * 1992-02-03 1993-08-27 Sharp Corp 情報記録再生装置
JPH0696559A (ja) * 1992-09-11 1994-04-08 Sony Corp 記録装置
EP0778572A2 (fr) * 1995-12-08 1997-06-11 Sony Corporation Appareil d'enregistrement et de reproduction de données et méthodes

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