WO1997018671A1 - Systeme d'enregistrement/reproduction de donnees video, dispositif d'enregistrement/reproduction de donnees audio/video, son systeme, et dispositif de reproduction de donnees - Google Patents
Systeme d'enregistrement/reproduction de donnees video, dispositif d'enregistrement/reproduction de donnees audio/video, son systeme, et dispositif de reproduction de donnees Download PDFInfo
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- WO1997018671A1 WO1997018671A1 PCT/JP1996/003367 JP9603367W WO9718671A1 WO 1997018671 A1 WO1997018671 A1 WO 1997018671A1 JP 9603367 W JP9603367 W JP 9603367W WO 9718671 A1 WO9718671 A1 WO 9718671A1
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- 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
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- H—ELECTRICITY
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
- G11B15/12—Masking of heads; circuits for Selecting or switching of heads between operative and inoperative functions or between different operative functions or for selection between operative heads; Masking of beams, e.g. of light beams
- G11B15/125—Masking of heads; circuits for Selecting or switching of heads between operative and inoperative functions or between different operative functions or for selection between operative heads; Masking of beams, e.g. of light beams conditioned by the operating function of the apparatus
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
- G11B15/1808—Driving of both record carrier and head
- G11B15/1875—Driving of both record carrier and head adaptations for special effects or editing
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
- G11B15/46—Controlling, regulating, or indicating speed
- G11B15/467—Controlling, regulating, or indicating speed in arrangements for recording or reproducing wherein both record carriers and heads are driven
- G11B15/4671—Controlling, regulating, or indicating speed in arrangements for recording or reproducing wherein both record carriers and heads are driven by controlling simultaneously the speed of the tape and the speed of the rotating head
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- 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
- G11B27/005—Reproducing at a different information rate from the information rate of recording
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- G—PHYSICS
- G11—INFORMATION STORAGE
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- 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
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- 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
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
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- 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
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
- G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
- G11B27/3027—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording used signal is digitally coded
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- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/008—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires
- G11B5/00813—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes
- G11B5/00847—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes on transverse tracks
- G11B5/0086—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes on transverse tracks using cyclically driven heads providing segmented tracks
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- H—ELECTRICITY
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
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- H04N5/91—Television signal processing therefor
- H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
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- H04N9/797—Processing of colour television signals in connection with recording for recording the signal in a plurality of channels, the bandwidth of each channel being less than the bandwidth of the signal
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- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
- G11B15/026—Control of operating function, e.g. switching from recording to reproducing by using processor, e.g. microcomputer
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- 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
- G11B20/1201—Formatting, e.g. arrangement of data block or words on the record carriers on tapes
- G11B20/1207—Formatting, e.g. arrangement of data block or words on the record carriers on tapes with transverse tracks only
- G11B20/1208—Formatting, e.g. arrangement of data block or words on the record carriers on tapes with transverse tracks only for continuous data, e.g. digitised analog information signals, pulse code modulated [PCM] data
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- G—PHYSICS
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- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B2020/10833—Copying or moving data from one record carrier to another
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/90—Tape-like record carriers
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- 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
- G11B27/032—Electronic editing of digitised analogue information signals, e.g. audio or video signals on tapes
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
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- 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
- H04N5/782—Television signal recording using magnetic recording on tape
- H04N5/783—Adaptations for reproducing at a rate different from the recording rate
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- H—ELECTRICITY
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- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/93—Regeneration of the television signal or of selected parts thereof
- H04N5/94—Signal drop-out compensation
- H04N5/945—Signal drop-out compensation for signals recorded by pulse code modulation
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- H—ELECTRICITY
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- H04N9/87—Regeneration of colour television signals
- H04N9/88—Signal drop-out compensation
- H04N9/882—Signal drop-out compensation the signal being a composite colour television signal
- H04N9/885—Signal drop-out compensation the signal being a composite colour television signal using a digital intermediate memory
Definitions
- the present invention provides a video data overnight recording / playback system that records digital audio data and / or video data or one of them (audio / video data) and reproduces the recorded audio / video data.
- the present invention relates to a data recording / reproducing device and its system, and a data reproducing device.
- the video (material) that is the basis of the video broadcasted by a television camera or the like with a built-in video tape recorder (VTR device) The video and audio are recorded on videotape and managed separately, and the editor can use the VTR equipment in the editing room to record one or more audio and video data (AV) recorded on the videotape as needed. This is done by recording the actual broadcast image on another tape by combining the reproduced material images.
- news videos produced on tapes are generally carried and mounted manually on a VTR device for transmitting a program or on a cart machine incorporating a VTR device for transmitting a program.
- a VTR device for transmitting a program
- a cart machine incorporating a VTR device for transmitting a program.
- a so-called server system which has the same configuration as a computer and enables the centralized management and operation of material video or broadcast video and the sharing of material video. .
- a server system having a configuration similar to that of a conventional computer is not necessarily suitable for recording and reproducing high-quality audio and video data in a television broadcasting station, and the data transfer capability of the bus is insufficient.
- the system scale or the expandability of the system is limited, the transfer of audio and video data (dubbing) takes a relatively long time, the synchronous connection with existing broadcasting equipment is difficult, and the absolute amount of system delay time is large.
- the present invention has been made in view of the above-described problems of the related art, and it is possible to transmit audio / video data from a video / audio data reproducing apparatus such as a VTR to a recording / reproducing apparatus of a server system in a relatively short time. It is a main object of the present invention to provide a video recording / playback system, audio / video recording / playback apparatus and its system that can be dubbed.
- the present invention also provides high-speed playback of audio and video data so that recording and playback of audio and video data in a server system can be dubbed in a relatively short time.
- Another object of the present invention is to provide a video data recording / reproducing system, a voice / video data recording / reproducing apparatus, and a system thereof.
- the present invention provides a broadcasting system of a television broadcasting station, wherein audio and video are provided in accordance with the business scale of each television broadcasting station or the type of business to which the broadcasting system of the same television broadcasting station is applied.
- the size and function of the data server system can be changed, the function and configuration can be easily changed, and the scalability is high and the cost is low.
- Yet another object is to provide a system.
- the present invention generally relates to a method for transmitting and transmitting audio / video data in a strictly synchronized manner with a reference synchronization signal or a time code in a broadcasting system in a television broadcasting station, Considering the easiness of connection, video data overnight recording and playback system that can handle audio and video data in synchronization with a reference synchronization signal input from the outside, etc., audio and video data overnight recording and playback Still another object is to provide an apparatus and a system thereof.
- the present invention reduces the system delay time by reducing as much as possible the part that causes system delay time in the audio / video data to be handled, and reduces the system delay time when controlled by an external control device.
- Yet another object is to provide a system.
- the present invention provides a video data recording / reproducing system in a broadcasting system, which can transfer and exchange audio / video data in synchronization with a reference synchronizing signal as much as possible, thereby reducing a portion requiring synchronous Z asynchronous conversion processing. Still another object of the present invention is to provide an audio / video data recording / reproducing device and its system.
- the present invention provides a video data recording / reproducing system and a voice / video data recording / reproducing apparatus which enable transfer and exchange of baseband digital audio / video data It is still another object to provide such a system.
- Another object of the present invention is to provide a non-tracking type overnight playback device (VTR device) capable of performing double speed playback while using mechanical components having the same accuracy as a VTR device performing 1x speed playback. Aim.
- VTR device non-tracking type overnight playback device
- a video data recording / reproducing system comprises: recording / reproducing means for recording / reproducing video data; and externally supplied video data to the recording / reproducing means.
- a recording / playback device having an input / output control unit for supplying the video data from a recording medium and supplying the video data to the input / output control unit; and
- a playback device having control means for controlling the playback means so as to play back the video data.
- a video data recording / playback system, wherein the control means of the playback device comprises: Means for inquiring about the playback speed of the video data, and receiving playback speed approval data or playback speed designation data supplied from the input / output control means.
- the audio / video data recording / reproducing apparatus includes a recording / reproducing means for recording / reproducing audio / video data, a control input signal received from outside, and the received control input signal First input / output control means for inputting / outputting the audio / video data at a first data rate between the recording / reproducing means, and a control input signal, and in response to the received control input signal, Between the recording and playback means
- Second input / output control means for inputting / outputting the audio / video data at a second data rate higher than the first data rate; and at least the first input / output control means and the second input / output control means It has a recording / reproduction control means for transmitting and receiving a predetermined control signal and controlling the first input / output control means and the second input / output control means.
- the recording / playback control means sends a notification of a recording request signal requesting recording to the recording / playback means of an input audio / video data input from the outside to the first input / output control means.
- And recording area allocating means for receiving, from the second input / output control means, allocating a recording area of the recording / reproducing means for recording the input audio / video data, and allocating the recording area to the input audio / video data.
- a recording area notifying means for notifying the first input / output control means and the second input / output control means of a recording area notification signal indicating a recording area of the recording / reproducing means;
- the control means and the second input / output control means each transmit the recording request signal from outside to the recording
- the recording / reproduction control means reproduces the audio / video data recorded in the recording / reproduction means and sends a notification of a reproduction request signal requesting output to the outside of the recording / reproduction means to the first input / output.
- a recording area search means for searching a reproduction area of the recording / reproduction means in which the audio / video data requested to be reproduced is recorded, the recording / reproduction means being found as a result of the search; Playback area notification indicating the playback area of Playback area notifying means for notifying a signal to the first input / output control means, wherein the first input / output control means and the second input / output control means each receive the playback request signal from outside.
- Recording / reproduction notifying means for notifying the recording / reproduction control means, and controlling the recording / reproduction means by receiving the reproduction area notification signal from the reproduction area notification means of the recording / reproduction control means.
- Reproduction control means for reproducing the human-powered audio / video data from the reproduction area of the recording / reproduction means indicated by the reproduction area notification signal, and outputting the reproduced audio / video data to the outside; and sound indicating the end of the audio / video data requested to be reproduced.
- End notification means for receiving a voice / video data end signal from the recording / reproduction means and notifying the outside of the audio / video data, wherein the recording / reproduction means reproduces the reproduced audio-video data. If ended, an audio-video data end notification means for notifying said voice-Film image data end signal indicating the end of the audio and video de Isseki to said first input-output control means.
- the first input / output control means, the second input / output control means, and the recording / reproducing means are connected via the same data bus, and the first input / output control means and The second input / output control means and the recording / reproducing means are connected via the same control bus.
- the recording / reproducing means records / reproduces audio / video data on a recording medium capable of recording / reproducing a baseband audio / video data of a first data rate.
- the recording / reproducing means records the audio / video data on a predetermined recording medium such as a hard disk, a magneto-optical disk, a semiconductor memory, or a VTR tape.
- the first input / output control means is, for example, a normal data rate (1st data; real-time) audio obtained by reproducing a VTR tape at a normal speed (1 ⁇ speed) by a VTR device.
- ⁇ Used for input / output of video data.
- Examples of the first input / output means include: For example, a control device for controlling the audio / video data recording / reproduction device according to the present invention, such as an editing device, is connected, and each of the input / output control devices receives a control input signal. If the received control input signal is, for example, a recording request signal for requesting the recording / reproducing means to record audio / video data, the input / output control means accepting this signal outputs the recording request signal. Notify the recording / playback control means via the control bus.
- the recording / playback control means which has been notified of the recording request signal, assigns a recording area of the recording / playback means to the input audio / video data input for recording, and indicates the assigned storage area.
- the area notification signal is returned to the input / output control means.
- the input / output control means controls the recording / reproducing means, transfers the input audio / video data via the data bus, and records the data in the notified recording area.
- the received control input signal is, for example, a reproduction request signal for requesting to reproduce audio-video data recorded in the recording / reproducing means and output the signal to an external device
- the input / output receiving the signal The control means notifies the recording / reproduction control means of the reproduction request signal via the control bus.
- the recording / reproduction control means searches the recording area of the audio / video data requested to be reproduced and the recording area of the reproduction means, and reproduces the recording area found.
- An area notification signal is returned to the input / output control means via the control bus.
- the second input / output control means includes, for example, a high-speed data rate (second data rate) obtained by reproducing a VTR tape by a VTR device while reducing the reproduction time to 12 or 1 to 3. (Non-real-time) audio / video data input / output.
- a high-speed transmission device is connected and performs the same processing as the first input / output means.
- the input / output control means controls the recording / reproducing means via the control bus, and reproduces the audio / video data requested to be reproduced from the recording area indicated by the reproduction area notification signal.
- the recording / playback means finishes playing the audio / video data requested to be played back
- the playback processing is completed via the control bus (end of the audio / video data requested to be played back).
- Is returned to the input / output control means, and the input / output control means further notifies the control device connected to the outside.
- the audio / video data recording / reproduction system according to the present invention has a plurality of audio / video data recording / reproduction devices, and the audio / video data recording / reproduction device records / reproduces audio / video data.
- a second input / output control means for receiving a control input signal, and a second data higher than the first data between the recording / reproducing means in response to the received control input signal;
- a second input / output control means for inputting / outputting the audio / video data, and transmitting / receiving a predetermined control signal to / from at least the first input / output control means and the second input / output control means.
- the first input / output control means And a recording / reproduction control means for controlling the second input / output control means, wherein the recording / reproduction control means comprises an externally input audio / video data recording / reproduction means.
- Receiving from the first input / output control means and the second input / output control means a notification of a recording request signal requesting recording to the recording / reproducing means for recording the input audio / video data.
- Recording area allocating means for allocating a recording area, and a recording area notification signal indicating a recording area of the recording / reproducing means allocated to the human-powered audio / video data, the first input / output control means and the second input / output control means.
- Recording area notifying means for notifying the first input / output control means and the second input / output control means, respectively, of the recording request signal from outside.
- a recording request notifying unit for notifying a reproduction control unit and receiving the recording area notification signal, controlling the recording / reproduction unit, and setting the recording / reproducing unit in the recording area indicated by the received recording area notification signal.
- Recording control means for recording input audio / video data and connecting between the plurality of audio / video data recording / reproducing apparatus second input / output control means to record / reproduce these audio / video data. Between the equipment and the second Transmit and receive audio and video data.
- a data reproducing apparatus has a rotating drum, n (n ⁇ 2) data reading head means disposed on an outer peripheral surface of the rotating drum, and a data reproducing means.
- the recording data recorded alternately on the helical track of the tape recording medium at the first azimuth angle and the second azimuth angle is recorded on the helical track, and the identification data indicating the order of the recording data is recorded.
- a data reproducing apparatus that reproduces the data by using the rotating drum rotating at a constant rotation speed, causing the n sets of data reading heads to scan the helical track, and reading the n pieces of data.
- Each of the head means scans the helical track with the first azimuth angle added thereto and the helical track separated by one, and reads the recording data and the identification data. Scanning the helical track across the two first reproduction heads and the helical track with the second azimuth angle, and records the recorded data and the identification data.
- the second data read head, and the data read / write unit reads errors in the identification data read out and the recorded data read out by the n data read out heads, respectively.
- the data reproducing means is provided for each of the n data reading head means or for each part, and the recording read by the corresponding data reading head means respectively.
- the data arranging means arranges and outputs the recording data selected by each of the n data selecting means in the order of recording based on the corresponding identification data.
- the tape recording medium travels at a traveling speed of m times (2 ⁇ imI ⁇ n) times the traveling speed when reproducing the recording data at 1x speed, and the rotating drum is
- the recording data is reproduced at 1 ⁇ speed
- the tape is rotated at a rotation speed corresponding to the running speed of the tape recording medium
- the n data reading heads scan the helical track
- the helical track is read.
- the n data read heads that scan the data read out the recording data and the identification data from each of the scanned helical tracks, and the data reproducing means reads out the n data read heads.
- the recording data read out by m pieces are arranged in the order of recording based on the corresponding identification data, and the recording data is output at m times speed.
- the recording data is audio / video data
- the tape recording medium travels at a traveling speed different from a traveling speed when reproducing the audio / video data at 1 ⁇ speed
- the rotating drum includes: The data reading is performed by rotating at a rotation speed corresponding to the running speed of the tape recording medium, causing all or a part of the n data reading heads to scan the helical track, and scanning the helical track.
- Each of the head means reads out the audio and video data and the identification data from each of the scanned helical tracks, and the data reproducing means buffers the audio and video data arranged in the recording order. Further comprising a buffering means for outputting the data; and a head for reading the data for scanning the helical track.
- the VTR device (data reproducing device) according to the present invention has a helical traverse on the tape running surface of the drum (rotary drum) at a position symmetrical with respect to the rotation center of the rotary drum.
- Two azimuth angles (the first azimuth angle) at a distance equal to one azimuth angle (the first azimuth angle);
- the data reproducing apparatus comprises, among the 4 ⁇ 4 (4 ⁇ n) reproducing heads, 8 (2 ⁇ n) reproducing heads having the same azimuth angle (the first reproducing head).
- Head or the second playback head plays the so-called non-tracking method by selecting and outputting the 8 (2 xn) recorded data (audio / video data overnight) that has been reproduced with the least error. To play audio / video data.
- the rotating drum rotates at the same rotation speed as in 1x-speed playback even when performing 2x-speed playback, for example, 2x-speed playback, and causes the 4 (n) data read heads to scan all helical tracks on the tape recording medium. .
- identification data indicating the order of the audio and video data is recorded together with the audio and video data, and each of the four data reading head means for scanning the helical track is four in total. 4 X 2 voice ⁇
- the error detection means of the data reproduction means uses, for example, an error correction code added to the audio / video data, and one of the four reproduction heads has the same azimuth angle as the helical track being scanned. Detects errors in 4x2 audio / video data read by each of the two data read heads that accurately trace the helical track.
- the data selection means selects the audio data with the least error among the four audio data read out by each of the two data read heads described above, and the azimuth angle matches and the helical data is accurate.
- the playback head tracing the track (two Either the first playback head or the two second playback heads) selects the read audio / video data.
- the data selection means of the 4 ⁇ 2 audio / video data read by the two data read heads, two data read means corresponding to the two data read heads, respectively.
- the data arranging means arranges the selected two audio / video data in the order of recording based on the corresponding identification data and outputs the data.
- the tape recording medium is caused to run at four times the speed at the time of 1x-speed reproduction, and the four data read-out heads are used. Read the audio and video data using all of them, and select the 4 audios corresponding to each of the four data read heads from the read 4 x 4 audio and video data. Output as an array.
- the tape recording medium is caused to run at the speed at 1 ⁇ speed reproduction, and one of the above four data read head means is used.
- the audio and video data are read out, and the four audio and video data that have been read out are selected from one audio and video data, and are arranged and output in the order of recording.
- Figure 1 is a diagram showing an example of the configuration of a server system for audio and video data that has the same configuration as a computer.
- FIG. 2 is a diagram showing a configuration of a data recording / reproducing apparatus according to the present invention in the first embodiment
- FIG. 3 is a diagram showing a configuration of a first AV data input / output circuit
- FIG. 4 is a diagram showing a case where audio and video data are recorded in the storage device shown in FIG.
- FIG. 3 is a diagram showing a signal sequence between respective components of the recording / reproducing device
- FIG. 5 is a diagram showing a signal sequence between respective components of the data recording / reproducing device when reproducing audio / video data recorded in the storage device.
- FIG. 6 is a diagram showing a configuration of an AV data input / output control circuit according to the present invention in the second embodiment
- FIG. 7 is a diagram showing a configuration of a data recording / reproducing apparatus according to the third embodiment of the present invention.
- FIG. 8 is a diagram showing a configuration of an AV data overnight input / output control circuit for non-real time baseband uncompressed audio / video data shown in the third embodiment
- FIG. 9 is a diagram showing a signal sequence between components of the data recording / reproducing apparatus when recording non-real-time baseband audio / video data in the storage device shown in FIG.
- Fig. 10 shows the signal sequence between the components of the non-real-time baseband audio and video data recorded in the storage device shown in Fig. 7 when reproducing the video data.
- FIG. 11 is a diagram showing a configuration of a data recording / reproducing system according to the fourth embodiment.
- FIG. 12 is a diagram showing a configuration of a data recording / reproducing system according to the fifth embodiment.
- FIG. 13 is a diagram showing a configuration of a VTR device according to the present invention in the sixth embodiment.
- FIGS. 14A and 14B are diagrams showing the configuration of a synchronous block for audio and video data recorded on the VTR tape shown in FIG.
- FIGS. 15A and 15B are diagrams showing the data configuration of the identification data ID shown in FIGS. 14A and 14B, respectively.
- Figures 16A to 16C show the recorded data ( Figure 14A and Figure 14B) on VTR tape (Fig. 13 is a diagram showing the recording format when recording is performed,
- FIG. 17 is a diagram showing the configuration of the reproducing unit according to the present invention in the seventh embodiment.
- FIG. 18 is a diagram showing the configuration of the reproducing head unit shown in FIG.
- FIG. 3 is a diagram illustrating the case of
- FIGS. 19A to 19P are timing charts showing the operation timing of each component of the reproducing unit shown in FIG. 17,
- FIGS. 2OA and 20B are diagrams showing the relationship between the overhead related to non-tracking processing and the bus bandwidth.
- FIGS. 21A and 21B are diagrams showing the relationship between the overhead related to non-tracking processing, the processing capacity required for components for performing non-tracking processing, and the bandwidth.
- FIG. 22 is a diagram showing a configuration when the reproducing unit shown in FIG. 17 reproduces recorded data at 1 ⁇ speed.
- FIG. 1 is a diagram showing a configuration example of a server system 8 for audio / video data.
- the server system 8 is connected via the main components of the computer: CPU 40 KROM 402, RAM 403, high-speed bus 404, and device interface 405.
- the audio / video data compression means 408 ⁇ and the audio / video data compression means 408 connected via a remote recording / reproducing device 406 m and a human interface 407 Audio and video data decompressors corresponding to ⁇ It consists of stages 409 n .
- a LAN interface 4 11 1 for connecting the LAN 410 to the server system 8 is provided.
- the audio / video data compression means 4 08 n compresses the manually input audio / video data S 4 0 n to obtain the compressed audio / video data.
- the data S 1 n is generated and transferred to the high-speed bus 404 via the input / output interface 407 n .
- the compressed audio / video data transferred to the high-speed bus 404 is temporarily stored (buffered) in the RAM 403 for data flow control, etc., and then transferred to the bus 404 again.
- the server system 8 reproduces audio / video data
- the compressed audio / video data recorded in the data recording / reproducing device 406 is reproduced, and then the device interface 405 m Is transferred to the high-speed bus 40 via.
- the compressed audio / video data transferred to the high-speed bus 404 is buffered in the RAM 403 for data flow control and the like, as in the recording, and transferred to the high-speed bus 404 again.
- audio and video data decompression means outputs from the system decodes the video signal S 4 3 [pi from the input data S 4 2 n.
- the command supplied from the control line S 4 4 n, O fin evening face 4 0 7 ", is transmitted to the C PU 4 0 1 via the high speed bus 4 0 4 and RAM 4 0 3,
- C PU 4 0 1 is output in the evening Hue Ichisu 4 0 7 [pi, based on the high-speed bus 4 0 4 and Debaisuin evening Fuwesu 4 0 5 m operation control line S 4 4 n or et supplied instruction of
- the server system 8 shown in Fig. 1 is not necessarily suitable for recording and reproducing high-quality audio and video data in a television broadcasting station, for the following reasons.
- the server system 8 handles high-quality audio and video data at the level used by television broadcast stations, the bus data transfer capacity is insufficient and the system scale or system expandability is limited. Is done.
- the current digital audio format of audio and video data is more than 100 Mbps, and this audio and video data is coded audio and video with high efficiency coding.
- the data is also about 3 OMbps (4 Mbytes Zs) in detail, taking into account the deterioration due to editing and processing, for example, as described in CC IR Recommendation 723.
- the encoded audio / video data will be transmitted at the same time. Therefore, the high-speed bus 404 has coded audio
- an effective data transfer rate of at least 192 MBps is required.
- the audio / video data is reproduced from the audio / video data reproducing device such as a VTR, and the audio / video data is reproduced by the data recording / reproducing device 400 m of the server system 8 shown in FIG.
- the dubbing time is relatively long because the data transfer capability in the server system 8 is small.
- the server system when implementing a server system that can be used in a television broadcasting station, the server system must be subordinately synchronized with a synchronization signal or time stamp supplied from the outside.
- audio / video data is transmitted and transmitted in strict synchronization with a reference synchronization signal for audio / video data or a time code.
- the server system 8 having the configuration shown in FIG.
- data transfer and exchange are performed using the asynchronous high-speed bus 404 and the RAM 403
- the audio and video data that is originally transmitted in synchronization with the reference synchronization signal, etc. is transmitted to the server system 8
- a synchronous / asynchronous conversion process for synchronizing with an external reference synchronous signal is required again, so that the device scale is increased and the manufacturing cost is also increased.
- the transfer and exchange of audio / video data are performed using the asynchronous high-speed bus 404 and the RAM 403. System delays occur, which impair the operation of the television broadcasting station system.
- the absolute amount of the system delay time becomes a problem, and in synchronizing with other broadcasting equipment, it becomes a problem whether or not the system delay time is a fixed value. .
- the absolute amount of the system delay time of the server system 8 can be determined, for example, when reproducing audio and video data at three locations: the device interface 405 m , the RAM 403, and the input / output interface 407 foi. Buffering is required for data flow control, etc., and it is basically difficult to satisfy the response performance required for editing work. Since the basic components of the system, such as the CPU and RAM, operate essentially asynchronously, there is a high possibility that the system delay time changes over time, and it is not easy to guarantee a constant value.
- the transmission of the control command itself has a delay time, and the control delay time does not matter. Even if it is short, the problem of the system delay of the server system 8 described above remains.
- the transfer and exchange of audio / video data are performed using the high-speed bus 404 and the RAM 403, so that the compression rate is high. It is necessary to transfer coded audio and video data that has been compressed and coded and adapted to the transfer capacity of the high-speed bus 404. Therefore, it is difficult for the server system 8 to transfer and exchange baseband digital audio / video data without deterioration, and for all broadcasting equipment connected to the server system 8, high-efficiency audio / video data is encoded. I have to supply data.
- FIG. 2 is a diagram showing a configuration of the data recording / reproducing apparatus 1 according to the first embodiment of the present invention.
- the data recording / reproducing device 1 has n audio / video data input / output Power control circuit (AV data input / output control circuit) 10, to 10 n , recording / playback control circuit 34, synchronous / asynchronous conversion circuit 24, storage device 26, synchronous signal interface circuit (synchronous signal IF circuit) 28, a time code interface circuit (TCIF circuit) 30 and a multiplex control interface circuit (multiplex IF circuit) 32.
- AV data input / output control circuit AV data input / output control circuit
- recording / playback control circuit 34 synchronous / asynchronous conversion circuit 24
- storage device 26 synchronous signal interface circuit (synchronous signal IF circuit) 28, a time code interface circuit (TCIF circuit) 30
- TCIF circuit time code interface circuit
- multiplex IF circuit multiplex control interface circuit
- the AV data input / output control circuits 10, to 10 ⁇ and the synchronous / asynchronous conversion circuit 24 are connected to each other via a data bus 22 so that the recording / reproducing control circuit 3 4 ,
- the AV data input / output control circuits 10,..., 10 ⁇ and the storage device 26 are mutually connected via a control bus 20.
- the AV data input / output control circuit 10 i is connected to an external device 2 (an upper system) such as an editing device via a synchronizing signal IF circuit 28 as necessary to provide a reference synchronizing signal S 28 Is input, the time of audio / video data is indicated via the TCIF circuit 30, the time code S 30 used for establishing synchronization is input, and the AV signal is input via the multiplex IF circuit 32.
- Data input / output control circuit 10! ⁇ 1 0 n collective control signal Gosuru collectively braking operation of the S 3 2 is input.
- the data recording / reproducing apparatus 1 can transfer audio / video data on the data bus 22 in synchronization with a reference synchronization signal input from outside and a video code.
- an upper-level application system such as an editing device
- the AV data input / output control circuit 10 to 10
- collective input / output control for a plurality of audio / video data becomes possible. I have.
- the data recording / reproducing apparatus 1 can perform, for example, input / output control of real-time audio / video data obtained by reproducing audio / video data at 1 ⁇ (normal speed) from a VTR device. Distributes the load of recording and playback control, and simultaneously inputs and outputs multi-channel audio and video data for recording and playback.
- FIG. 3 shows the first AV data input / output circuit 10 i (i is an integer; 1 i ⁇ n, hereinafter the same) FIG.
- a microprocessor (CPU) 102 and a memory circuit (MEM) 1) A first AV data input / output control circuit 10 i composed of 112 and a data bus interface circuit (data bus IF) 114 is used.
- the microprocessor 102 is composed of, for example, a one-chip microprocessor having a built-in R 0 M storing a program.
- the microprocessor 102 transmits and receives the control signal S 10 a i to and from the external device 2, and transmits and receives the control signal to and from the recording / reproduction control circuit 3 via the control bus 20.
- the microprocessor 102 includes a control signal input from the recording / playback control circuit 34, a control signal S10a input from the external device 2, and a reference synchronization signal S28, if necessary. Based on the reference synchronizing signal S 28, the time code S 30 and the collective control signal S 32 input via the TC IF circuit 30 and the multiplexing IF circuit 32, respectively, It controls the operation of the data bus IF114, and controls the input and output of audio and video data between the external device 2 and the storage device 26.
- the data bus IF114 outputs the audio / video data to the storage device 26 via the data bus 22 under human control according to the control of the microprocessor 102. That is, the audio / video data buffered in the memory circuit 112 is output to the storage device 26 (synchronous / asynchronous conversion circuit 24), and the audio / video data input from the storage device 26 is stored in the memory 26. Output to circuit 1 1 2.
- the memory circuit 112 buffers the audio / video data S 1 O b, which is input from the external device 2, under the control of the microprocessor 102, and stores the data via the data bus IF 114 in the storage device 26 ( Output to synchronous / asynchronous conversion circuit 24) Also, the memory circuit 112 buffers the audio / video data input from the storage device 26 via the data bus IF 114, and outputs the audio / video data S10c to the external device 2 as audio / video data S10c. Output.
- each component of the data recording / reproducing apparatus 1 other than the AV data input / output control circuit 1 O i will be described.
- the recording / playback control circuit 34 sends and receives control signals to and from the AV data input / output control circuit 1 O i, the synchronous / asynchronous conversion circuit 24 and the storage device 26 via the control bus 20. Controls the operation of the components.
- the recording / reproduction control circuit 34 manages the recording area of the storage device 26, and receives a recording request signal of audio / video data for the storage device 26 from the AV output control circuit 1 O i. In this case, the recording area of the storage device 26 for recording audio / video data is determined, the AV data input / output control circuit 1 O i is notified, and the AV data input / output control circuit ⁇ O i is sent to the storage device 26.
- the recording area of the storage device 26 where the audio / video data to be reproduced is recorded is searched, and the found recording area is input to the AV data. Notify output control circuit 1 O i.
- the synchronizing signal IF circuit 28 synchronizes with the audio / video data 10 b,... 10 Ci handled by the external device 2, and uses a house clock and the like used for synchronizing each broadcasting device in a television broadcasting station.
- the reference synchronization signal is received and supplied to the AV data input / output control circuit 10 i and the synchronous / asynchronous conversion circuit 24 as the reference synchronization signal S 28.
- the TCIF circuit 30 is input from an external device such as the external device 2 and indicates the elapsed time or the display time of the audio / video data.
- the time code used for synchronizing the audio and the video in the external device 2 is used. Accept and supply as time code S30 to AV data input / output control circuit 10i and synchronous / asynchronous conversion circuit 24. Multiplexing]
- the F circuit 32 inputs and receives AV data Control circuits 10, to 10 ⁇ ⁇ Show the same processing contents for all, accept a collective control signal for controlling them collectively, and as AV control signal S 32 2, AV data input / output control circuits 10, to 10 supply to ⁇ .
- the synchronous / asynchronous conversion circuit 24 is used to transfer data synchronized with the reference synchronization signal S28 or the time code S30 on the data bus 22, and the AV data is transmitted via the data bus 22.
- the audio / video data input from the input / output control circuit 10 i in synchronization with these signals is asynchronously recorded in the storage device 26, and the audio / video data reproduced asynchronously by the storage device 26 is The signal is output to the AV data input / output control circuit 10 i via the data bus 22 in synchronization with these signals.
- the storage device 26 under the control of the recording / playback control circuit 34 via the control bus 20, stores data at a real-time baseband audio / video data rate such as a hard disk or a semiconductor memory. Isseki the recording and reproducing possible recording medium, the data bus 2 2 and the synchronous-asynchronous conversion circuit 2 4 via the AV data input control circuit 1 0; compressed coded input from (time compression) The audio / video data is recorded, and the recorded audio / video data is reproduced and transmitted to the AV / data input / output control circuit 1 O i via the synchronous / asynchronous conversion circuit 24 and the data bus 22.
- a real-time baseband audio / video data rate such as a hard disk or a semiconductor memory.
- the storage device 26 can record and reproduce a plurality of audio and video data independently and simultaneously, and a plurality of AV data input / output control circuits 1 O i can be used as if Each has one VTR device As if it is, the speech in the storage device 2 6 - can record and reproduce video data. By using such a storage device 26, it is possible to reproduce an arbitrary portion of the same material data at an arbitrary timing.
- the operation of the data recording / reproducing apparatus 1 will be described.
- FIG. 3 is a diagram showing a signal sequence between components of the device 1.
- FIG. 4 omits the exception processing when the storage device 26 has no free recording area or the like.
- a recording request signal is output from the external device 2 to the AV data input / output control circuit 1 O i as a control signal S 10 a :.
- the AV data input / output control circuit 1 O i that has received the recording request signal outputs a recording request signal to the recording / reproduction control circuit 3 via the control bus 20.
- the recording / playback control circuit 34 Upon receiving the recording request signal, the recording / playback control circuit 34 searches for an empty recording area in the storage device 26, and outputs an area allocation signal indicating the recording area allocated to the audio / video data requested to be recorded.
- the AV data input / output control circuit 1 O i that has received the area allocation signal to be output to the AV data input / output control circuit 10 and the storage device 26 sends the recording permission signal to the external device 2 as a control signal S 10 0 ai Output as
- the external device 2 that has received the recording permission signal outputs a recording command signal to the AV data input / output control circuit 1 O i, and the AV data input / output control circuit 1 O i receives the recording command signal via the control bus 20.
- a recording command signal is output to the storage device 26.
- the external device 2 transmits a real-time audio signal “video data S 10 b, not shown in FIG. 4” requesting recording to the storage device 26 to the AV data input / output control circuit 10.
- Audio ′ video data S 10 b output from the external device 2, is recorded in the storage device 26 via the AV data input / output control circuit 10 i and the data bus 22.
- the storage device 26 sends a recording completion notification signal to the AV data input / output control circuit 10i via the control bus 20. Is output.
- FIG. 5 is a diagram showing a signal sequence between respective components of the data recording / reproducing apparatus 1 when reproducing the audio / video data recorded in the storage device 26. Note that, in FIG. 5, for simplification of the description, the exception processing in the case where the audio / video data requested to be reproduced is not recorded in the storage device 26 is omitted.
- the external device 2 receives a reproduction request signal for requesting to reproduce the audio and video data recorded in the storage device 26 as a control signal S 10 a, and inputs and outputs AV data. Output to control circuit 1 O i.
- the AV data input / output control circuit 1 O i receiving the reproduction request signal outputs a reproduction request signal to the recording / reproduction control circuit 3 via the control bus 20.
- the recording / reproduction control circuit 3 Upon receiving the reproduction request signal, the recording / reproduction control circuit 3 searches the area of the storage device 26 where the audio / video data requested to be reproduced is recorded, and controls an area notification signal indicating the found recording area. The data is output to the AV data input / output control circuit 10 and the storage device 26 via the bus 20.
- the AV data input / output control circuit 1 O i that has received the area notification signal outputs the reproduction permission signal to the external device 2 as a control signal 10 a i.
- the external device 2 that has received the playback enable signal outputs the playback command signal to the AV data input / output control circuit 1 O i as a control signal S 10 a, and the AV data input / output control circuit 1 that receives the playback command signal O i outputs a playback completion signal to the storage device 26 via the control bus 20.
- the storage device 26 which has received the playback completion signal reproduces the audio / video data requested to be reproduced from the recording area indicated by the area notification signal received from the recording / reproduction control circuit 34, and outputs the data. 2 to the AV data input / output control circuit 10 i.
- the AV data input / output control circuit 1 O i outputs the audio / video data received from the storage device 26 to the external device 2 as real-time audio / video data S 10 C i (FIG. 5 Not shown).
- the storage device 26 transmits the reproduction completion notification signal to the AV data via the control bus 20. Output to the input / output control circuit 10 i.
- Regeneration completion notification AV data output control circuit 1 signals received 0; the reproduction completion notification via the control bus 20 and outputs to the recording and reproduction control circuit 34.
- the recording / playback control circuit 34 having received the playback completion notification signal outputs a playback completion recognition notification signal to the AV data input / output control circuit 1 O i via the control bus 20.
- the AV data input / output control circuit 1 O i that has received the notification of the completion of the reproduction outputs a reproduction processing completion notification signal to the external device 2 as a control signal S 10 a,
- AV data input / output control circuits 10 If all the same control signal (collective control signal S 32) is input, AV data input-output control circuit 1 0, ⁇ 1 0 n all perform the same recording or reproduction operation.
- the reference synchronizing signal S28 or the time code S30 is input from the synchronizing signal IF circuit 28 or the TC IF circuit 30, and the recording / playback control circuit 34 outputs the reference synchronizing signal S28 or the time code S3. If the AV input / output control circuit 10, ⁇ 10 adjand the synchronous / asynchronous conversion circuit 24 are controlled so that data transfer synchronized with 0 is performed, the transfer of audio and video data on the data bus 22 The second embodiment is performed in synchronization with these signals.
- FIG. 6 is a diagram showing a configuration of an AV data input / output control circuit 40 according to the second embodiment of the present invention.
- the AV data input / output control circuit 40 is provided between the external device 2 and the memory circuit 1 1 2 of the AV data input / output control circuit 10 i shown in FIG. And a decompression decoding circuit 122 are added.
- the AV data input / output control circuit 40 in the data recording / reproducing apparatus 1 shown in FIG. 2, transmits the baseband uncompressed audio / video data 10 b>, 10 c ( with the external device 2). It is used in place of the AV data input / output control circuit 10 i when recording / reproducing audio / video data compressed / encoded in the storage device 26 by inputting / outputting data between the storage devices 26.
- the compression encoding circuit 1200 compresses and encodes the uncompressed real-time audio / video data SIO bi input from the external device 2 using a compression encoding method such as MPEG, and outputs the data to the memory circuit 112. Output to
- the decompression decoding circuit 122 expands and decodes the compressed and encoded compressed audio and video data input from the data bus IF 114, and outputs real-time baseband uncompressed audio and video data Sl. Output to external device 2 as OC i.
- real-time uncompressed audio / video data manually input from the external device 2 to the compression encoding circuit i 20 is compression-encoded by the compression encoding circuit 120, and The data is output to the storage device 26 via the circuit 112 and the data bus IF 114, and is recorded on a predetermined recording medium by the storage device 26.
- the compressed audio / video data reproduced from the storage device 26 by the signal sequence shown in FIG. 5 is input to the extension decoding circuit 122 via the data bus IF 114 and the memory circuit 112. The data is then decompressed and decoded and output to the external device 2 as real-time audio / video data.
- audio / video data S 10 which is input as a base-band audio / video data bi can be compression-encoded and recorded in the storage device 26, and the compressed audio and video data reproduced by the storage device 26 can be converted to baseband audio. • Can be output to external device 2 as video data S10ci.
- the compression encoding circuit 120 and the decompression decoding circuit 122 may be configured to handle either audio data or video data.
- the synchronous / asynchronous conversion circuit 24 may be deleted or the operation of the synchronous / asynchronous conversion circuit 24 may be stopped.
- the AV data input / output control circuit 10 of the data recording / reproducing apparatus 1 shown in the first embodiment is intended to input / output real-time audio / video data.
- the data recording / reproducing device 1 can only input and output real-time audio / video data, high-speed audio / video between the data recording / reproducing device 1 and the external device 2 can be obtained.
- Data for example, audio / video data under double-speed playback cannot be transferred, so it takes time to transfer audio / video data, and the efficiency of editing work on the external device 2 is reduced.
- the audio / video data is deteriorated by the compression / expansion processing.
- the data recording / reproducing device 3 shown in the third embodiment is provided to solve such a problem.
- the data recording / reproducing device 1 receives non-real-time audio / video data.
- the configuration is such that an AV data input / output control circuit 50 to be output is added.
- FIG. 7 is a diagram showing a configuration of the data recording / reproducing device 3 according to the present invention in the third embodiment. Note that, of the components of the data recording / reproducing device 3 shown in FIG. 7, the same components as those of the data recording / reproducing device 1 shown in FIG. 2 are denoted by the same reference numerals. As shown in FIG.
- the data recording / reproducing apparatus 3 has n pieces of real-time audio as the same components as the data recording / reproducing apparatus 1 shown in the first embodiment and the second embodiment.
- the data recording / reproducing device 3 has an AV data input / output control circuit 50 as a component different from the data recording / reproducing device 1 shown in the first embodiment and the second embodiment.
- the AV data input / output control circuit 50 is different from normal real-time audio / video data obtained by performing, for example, double-speed or triple-speed reproduction from a VTR device. It is used to input and output data rate audio and video data (non-real-time audio and video data) to and from external equipment 2.
- the AV data input / output control circuit 50 is connected to the synchronous / asynchronous conversion circuit 24 and the data bus 22 in the same manner as the AV data input / output control circuit 10,.
- the AV data input / output control circuit 50 is connected to the recording / reproduction control circuit 34 and the storage device 26 via a control bus 20.
- the AV data input / output control circuit 50 receives a reference signal from the external device 2 via a synchronization signal IF circuit 28 as necessary.
- the signal S28 is input.
- a time code S30 which indicates the time of audio and video data and is used for establishing synchronization, is input to the AV data input / output control circuit 50 via the TCIF circuit 30.
- the AV de Isseki output control circuit 5 via the multiplexing IF circuit 3 2, AV data output control circuit 1 0, the operation of ⁇ 1 0 n and AV data input-output control circuit 5 0
- a collective control signal S32 used for collective control is input.
- the audio / video data on the data bus 22 synchronized with the reference synchronization signal and the time code input from the outside is recorded. Transfer is possible.
- FIG. 8 is a diagram showing a configuration of an AV data input / output control circuit 50 for non-real time baseband uncompressed audio / video data shown in the third embodiment. Note that among the components of the AV data input / output control circuit 50 shown in FIG. 8, the same components as those of the AV data input / output control circuit 10,... Is attached.
- a data recording / reproducing device 50 for inputting / outputting uncompressed audio / video data to / from the external device 2 and the storage device 26 includes a microprocessor 102, a memory circuit 500 It is composed of the De-Isana bus IF1-14.
- the memory circuit 500 stores the audio / video data S 500 b input from the external device 2 under the control of the microphone port processor 102 in the same manner as the data recording / reproducing device 112 (FIG. 3).
- the data is buffered and output to the storage device 26 (synchronous / asynchronous conversion circuit 24) via the data bus IF114.
- the memory circuit 500 buffers audio / video data input from the storage device 26 via the data bus IF 114, and outputs it to the external device 2 as audio / video data S500c. Output to
- the AV data input / output control circuit 500 is the same as the AV data input / output control circuit 100!
- the memory circuit 500 stores the AV data shown in FIG.
- the storage capacity is larger than that of the memory circuits 112 of the input / output control circuits 10, to 10 n .
- FIG. 9 shows a signal sequence between components of the data recording / reproducing device 3 when recording non-real-time baseband audio / video data in the storage device 26 shown in FIG. FIG.
- the exception processing when the storage device 26 has no free recording area is omitted.
- a recording speed request signal is output from the external device 2 to the AV data input / output control circuit 50 as a control signal S50a.
- the external device 2 notifies the data recording / reproducing device 3 of the non-real-time audio / video data decoding rate using the recording speed request signal.
- the AV data input / output control circuit 50 outputs, to the external device 2, a recording speed approval signal notifying that recording is possible at the notified data rate as a control signal S50a. .
- the external device 2 that has received the recording speed approval signal outputs a recording request signal to the AV data input / output control circuit 50.
- the AV data input / output control circuit 50 that has received the recording request signal outputs a recording request signal to the recording / reproduction control circuit 34 via the control bus 20.
- the recording / playback control circuit 34 Upon receiving the recording request signal, the recording / playback control circuit 34 searches for an empty recording area in the storage device 26, and outputs an area allocation signal indicating the recording area allocated to the audio / video data requested to be recorded. Output to the AV input / output control circuit 50 and the storage device 26. The AV data input / output control circuit 50 that has received the area allocation signal outputs a recording permission signal to the external device 2.
- the external device 2 that has received the recording enable signal outputs a recording command signal to the AV data input / output control circuit 50, and the AV data input / output control circuit 50 outputs the recording command signal received via the control bus 20.
- the signal is output to the storage device 26.
- the external device 2 is a non-real-time baseband audio / video data S 50 b or a compression-coded audio / video data S 50 b (not shown in FIG. 9) to the AV data input / output control circuit 50.
- the audio / video data S 50 b output from the external device 2 is recorded in the storage device 26 via the AV data input / output control circuit 50 and the data bus 22.
- the storage device 26 When the audio / video data is recorded in all the recording areas allocated by the recording / playback control circuit 3, the storage device 26 outputs a recording completion notification signal to the AV data input / output control circuit 50 via the control bus 20. I do.
- the AV data input / output control circuit 50 that has received the recording completion notification signal outputs a recording processing completion notification signal to the external device 2.
- FIG. 10 shows a data recording / reproducing device 3 for reproducing non-real-time baseband or compression-encoded audio / video data recorded in the storage device 26 shown in FIG.
- FIG. 3 is a diagram showing a signal sequence. It should be noted that FIG. 10 omits, for simplicity of explanation, exception processing such as when audio / video data requested to be reproduced is not recorded in the storage device 26.
- the external device 2 records the data rate of the audio / video data to be played back over time and an AV data input / output control circuit that sends a playback speed request signal to notify the playback device 3. Output for 50.
- the AV data input / output control circuit 50 outputs, as a control signal S50a, a reproduction speed approval signal notifying that reproduction is possible at the notified data rate.
- the external device 2 having received the playback speed approval signal outputs a playback request signal to the AV data output control circuit 50.
- the AV data input / output control circuit 50 that has received the reproduction request signal outputs a reproduction request signal to the recording / reproduction control circuit 34 via the control bus 20.
- the recording / reproduction control circuit 34 Upon receiving the reproduction request signal, the recording / reproduction control circuit 34 searches the area of the storage device 26 where the audio / video data requested to be reproduced is recorded, and outputs an area notification signal indicating the found recording area. Output to the AV data input / output control circuit 50 and the storage device 26 via the control bus 20.
- the AV data input / output control circuit 50 that has received the area notification signal outputs the reproduction permission signal to the external device 2 as a control signal S50a.
- the external device 2 that has received the playback enable signal outputs the playback command signal to the AV data input / output control circuit 50 as a control signal S50a, and the AV data input / output control circuit that receives the playback command signal. 50 outputs a reproduction command signal to the storage device 26 via the control bus 20
- the storage device 26 that has received the reproduction command signal reproduces the audio / video data requested to be reproduced from the recording area indicated by the area notification signal received from the recording / reproduction control circuit 34, and outputs the data. And outputs it to the AV data input / output control circuit 50.
- the AV data input / output control circuit 50 outputs the audio / video data received from the storage device 26 to the external device 2 as non-real-time audio / video data S50c (see FIG. 10). (Not shown).
- the storage device 26 sends the reproduction completion notification signal to the AV via the control bus 20. Output to the input / output control circuit 50 overnight.
- the AV data input / output control circuit 50 that has received the reproduction completion notification signal outputs a reproduction completion notification to the recording / reproduction control circuit 34 via the control bus 20.
- the recording / playback control circuit 34 having received the playback completion notification signal outputs a playback completion recognition notification signal to the AV data input / output control circuit 50 via the control bus 20.
- the AV data input / output control circuit 50 that has received the notification of the completion of the reproduction
- the raw processing completion notification signal is output as the control signal S50a.
- the reproduction speed request signal and the reproduction speed acknowledgment signal precede the signal sequence (FIG. 5) at the time of reproduction of the data recording / reproducing apparatus 1, and the Real-time audio data can be reproduced from the storage device 26.
- the AV data input / output control circuits 10 When the same control signal (batch control signal S32) is input to all of the AV data input / output control circuits 50, the AV data input / output control circuits 10 to 10 ⁇ and the AV data The input / output control circuit 50 performs the same recording or reproducing operation.
- the reference synchronizing signal S28 or the timer code S30 is input from the synchronizing signal IF circuit 28 or the TCIF circuit 30, and the recording / reproducing control circuit 34 receives the reference synchronizing signal S28.
- the AV data overnight input / output control circuit 10, to 10 n , the AV data input / output control circuit 50, and the synchronous' asynchronous conversion circuit 24 were controlled so that data transfer synchronized with the time code S 30 was performed. In this case, the transfer of audio and video data on the data bus 22 is performed in synchronization with these signals.
- the AV data input / output control circuit 10 i performs recording / reproduction of audio / video data in parallel with the recording / reproduction operation of the AV data input / output control circuit 50. It goes without saying that it is possible to perform As described above, according to the data recording / reproducing device 3 shown in the third embodiment, the non-real-time audio / video data having a higher data rate than the real-time audio / video data can be obtained. Input and output become possible, the time required for transferring audio and video data to and from the external device 2 is reduced, and the efficiency of editing work on the external device 2 is improved.
- the AV data input / output control circuit 50 is compressed and encoded by further adding a high-speed compression encoding circuit 120 and a decompression decoding circuit 122 to the AV data input / output control circuit 50. Audio and video data can be transformed so that they can be input and output.
- the data recording / reproducing device 3 may be configured to have a plurality of AV data input / output control circuits 50.
- FIG. 11 is a diagram showing a configuration of a data recording / reproducing system 4 in the fourth embodiment.
- the data recording and reproducing system 4 As shown in FIG. 1 I, the data recording and reproducing system 4, data recording, reproducing apparatus 3 and the external device 2, composed of 2 2.
- External device 2 for example, a editing apparatus for editing the audio and video data, external device 2 is de Isseki recording 'reproducing apparatus 3 of AV de - click output control circuit 1 0 , between ⁇ 1 0 3, three control signals S 1 0 a, ⁇ 1 0 a: 1, 2 pieces of input (external device 2, as viewed from the side) audio 'video data S 1 0 c! And receives S 1 0 c 2 and one output audio and video de Isseki S 1 0 b 3.
- External device 2 2 the external device 2, and similarly, for example, data recording, with the AV data input-output control circuit 1 0 4 ⁇ 1 0 s of the reproducing apparatus 3, three control signals S 1 0 a 4 to transmit and receive ⁇ 1 0 a 6, 2 pieces of input audio and video data S 1 0 c 4, S 1 0 c 5 and one output audio and video data S 1 0 b 6.
- the external device 2,, 2 2 the supply data records subject to audio and video data of the edited respectively (Isseki Material de),
- the audio / video data obtained as a result of the editing process can be received from the playback device 3 and can be recorded on the data recording / playback device 3 o
- Data recording and playback device 3 the external device 2 two, voice in response to the 2 2 request, records the video data • be reproduced Can be.
- the data recording / reproducing system 4 can record the audio / video data received from the high-speed transmission device, reproduce the recorded audio / video data, and supply the reproduced data to the data recording / reproducing system 4. It is possible.
- AV data output control circuit 1 0, the external device 2 via the ⁇ 1 0 S,, de via the data bus 2 2 audio and video data input from the 2 2 - evening recording and reproducing system 4 It is possible to supply audio / video data supplied from the high-speed transmission device to the external equipment 2, 2 2 Therefore, according to the data recording / reproducing system 4 shown in the fourth embodiment, it is possible to respond to a request for recording / reproducing audio / video data by a plurality of external devices 2, and furthermore, to provide a non-real-time audio ⁇ It becomes possible to transmit and receive the video data input S50b according to the request of the high-speed transmission device.
- the external device 2 the material data 2 2 uses, prepared in the data recording • reproducing apparatus 3 receives in advance from high-speed transmission system Can improve the efficiency of editing work.
- a plurality of external devices 2 are respectively connected to a plurality of data recording / reproducing devices 1 shown in the first and second embodiments, and a plurality of external devices 2 are connected to a plurality of data recording / reproducing devices 1.
- a plurality of external devices 2 are connected to a plurality of data recording / reproducing devices 1.
- each of the plurality of external devices 2 is connected to a plurality of data recording / reproducing devices 1
- each of the plurality of external devices 2 is connected to a plurality of data recording / reproducing devices 1 and the respective AV data. This occupies the input / output control circuit 1 O i.
- the overnight recording / reproducing system 5 shown in the fifth embodiment has been made to solve such a problem.
- the data recording and playback system 5 Recording * Use a data recording / reproducing device 3 (Fig. 7) in place of the reproducing device 1 (Fig. 2) to enable recording and playback of audio and video data for multiple data recording / reproducing devices by the external device 2, and
- the purpose is to allow as many external devices 2 as possible to be connected to a plurality of data recording and reproducing devices.
- FIG. 12 is a diagram showing a configuration of a data recording / reproducing system 6 according to the fifth embodiment.
- the data recording and reproducing system 5 two data recording, playback device 3, composed of 3 and four external devices 2! 21 to 24 of.
- the AV data input / output control circuit 50 (FIGS. 7 and 8) of the data recording / reproducing device 3 receives the non-real-time audio / video data S 50 b from the high-speed transmission device, and outputs the audio / video data. and outputs to the data S 5 0 c, de Isseki recording and reproducing apparatus 3 2 of AV de Isseki output control circuit 5 0.
- the AV data input / output control circuits 10, to 10 e of the data recording / reproducing device 3 control signals S 10 a 2 to S 10 a between the external devices 2,, 2 respectively. to send and receive e, the external device 2,, 2 2 audio and the video data S 1 0 b 3, S l 0 b s accept the external device 2,, 2 2 audio and video data S 1 with respect to 0c, S10c, S10c, and S10c are output.
- AV de Isseki output control circuit 5 0 of the data recording and reproducing apparatus 3 2 receives a non-real-time audio and video data S 5 0 b 2 from the high-speed transmission system, data SL ⁇ 'reproducing device 3, AV data input-output control circuit 5 0 0 audio and video data S 5 from c, and receives also, AV data output control circuit 1 0-1 0 6 data recording and reproducing apparatus 3 2 each external device 2 3, 2 control signal S 1 0 a between 4 and send and receive to S 1 0 a 6, the external apparatus 2 3, 2 4 sound from 'image data S 1 0 b 3, S l 0 b 6 accept the external device 2 3, 2 voice against 4 'video data S 1 0 c,, and outputs the S 1 0 c 2, S 1 0 c 4, S 1 0 c ⁇ .
- the data recording / reproducing device 3 2 can receive the audio / video data recorded in the data recording / reproducing device 3 as audio / video data S500c.
- the external device 2, of 21 to 24, sound external device 2 3 connected data Symbol recording * the reproducing apparatus 3 2, 2 4, data recording, reproducing apparatus 3, were recorded in any of the 3 2 and video data can also be subjected to editing processing, it is possible to record audio and video data obtained as a result of editing the data recording and reproducing apparatus 3 2.
- the data recording / reproducing system 5 shown in the fifth embodiment the data recording / reproducing device 3 responds to the requests of the four external devices 2 and video data S 1 0 b, a, the external device 2 receives accordingly the control signal S 1 0 a from non 21 to 24, further control signal S 1 0 a, data recording and reproducing instrumentation according Location 3, can perform the copying of the audio 'video data received between 3 2.
- audio / video data can be transmitted from an external device such as a VTR device to a server system data recording / reproducing apparatus in a relatively short time. Can be transferred (dubbed)
- the audio / video data recording / reproducing apparatus and the audio / video data recording / reproducing system described above in the broadcasting system of a television broadcasting station, the business scale of each television broadcasting station or the same television broadcasting
- the scale and function of the audio / video data server system can be changed according to the type of business to which the broadcasting system in the station is applied. Therefore, the above-described audio / video data recording / reproducing apparatus and audio / video data recording / reproducing system can easily change functions and configurations, have high expandability, and have low cost.
- audio / video data recording / reproducing device and the audio / video data recording / reproducing system described above usually in a broadcasting system in a television broadcasting station, Considering that audio / video data is transmitted and transmitted strictly in synchronization with the reference synchronization signal or time code, and is easily connected to existing broadcasting equipment, it is input from outside. Audio and video data can be handled in synchronization with the reference synchronization signal.
- the portion of the audio / video data to be handled that causes a system delay time is reduced as much as possible to reduce the system delay time.
- the control order from the external control device is supplied directly to the processing execution part, so that the control from the external control device is controlled. Can respond quickly
- audio / video data can be transmitted in synchronization with a reference synchronization signal used in the entire broadcasting system.
- the components that require the Z asynchronous conversion process can be reduced.
- baseband digital audio / video data can be transferred and exchanged.
- the audio / video data recording / playback device and audio / video data recording / playback system described above record non-real-time audio / video data in addition to the conventional real-time video / audio data recording / playback. ⁇ It can be played back, and the transmission time of audio and video data can be reduced. For example, it is suitable for editing a news video that has a limited editing work time.
- Non-tracking method
- PC / JP96 / 03367 Audio / video data is recorded on a video tape (VTR tape) by alternately inverting the azimuth angles of adjacent helical tracks. If the azimuth angle is alternately inverted for each helical track in this way, even if the playback head scans (traces) a helical track with a different azimuth angle, the audio and video data cannot be reproduced. .
- Non-Tracking video tape recorder
- VTR device On the tape running surface of the drum of the non-tracking type VTR, two reproduction heads (positive azimuth heads) with a positive azimuth angle are arranged at an interval of one helical track.
- two reproduction heads (negative azimuth heads) with a negative azimuth angle are placed at symmetrical positions with respect to the positive azimuth head and the rotation center of the drum, with an interval of one helical truck. Is done.
- these four playback heads scan the helical track and read out audio and video data, and the playback head whose azimuth angle matches the helical track (positive)
- the azimuth head or negative azimuth head) played back the audio and video with a lower error rate, which was read by the playback head that accurately traced the helical track during the entirety of the audio and video playback.
- Select and output data By adopting such a method, the non-tracking type VTR device greatly reduces the conditions for tracking control of the playback head for the helical track.
- VTR devices for television broadcasting stations use audio, video data recorded on VTR tapes at twice, four times the normal data rate (1x speed), etc.
- a double-speed playback function that plays back all audio and video data at a data rate that is an integer multiple of, or an arbitrary multiple such as 2.1 or 4.2 times is required.
- the frequency of the audio / video data (recording signal) read from the VTR tape will increase, and the operating frequency of the recording signal equalization processing circuit will increase.
- processing such as error correction for audio / video data reproduced from a recording signal has been accelerated, and it is difficult to realize the processing from hardware and software.
- the VTR device shown as each of the following embodiments solves these problems, and enables double-speed playback by a non-tracking method while using mechanical components with the same accuracy as a VTR device that performs 1x speed playback.
- the VTR device shown as each embodiment below enables double-speed reproduction by the non-tracking method without using special high-speed operation parts for the equalization processing circuit and the error correction processing circuit.
- the external device 2 connected to the AV data input / output control circuit 50 of the playback device 3 shown in FIG. 7 records audio 'video data on a magnetic tape
- VTR video tape recorder
- FIG. 13 is a diagram showing a configuration of a digital video device (VTR device) 1 according to the present invention in the sixth embodiment.
- the VTR device 61 includes a recording unit 61, a reproducing unit 62, and a tape running unit 616.
- Recording unit 6 1 the video data compression circuit (Bit- Rate Reduction ENCODE) 7 0 0, de - evening packing circuit (Dat a Packing) 7 0 2 , the outer code encoder circuit (ECC OUTER ENCODER) 7 0 4 , memory It consists of a circuit 706, an inner code encoder circuit (ECC INNNBR ENC0 DER) 708, and a recording head 612.
- the playback section 62 0 has a playback head section 62 2, an equalization section 62 4, an inner code correction section (ECC INN ER CORRECTION) 62 6, and a non-tracking processing section (Non-Tracking) section 62 8 , Memory section 630, outer code correction section (ECC OUTER CORRECTION) 632, data depacking section (Data Depacking) 634, jog memory section 636, data decimating circuit (RATE dec It is composed of 6 3 8 and a video data decompression circuit (Bit-Rate Reduction DECODE) 64 0.
- the tape running section 6 16 includes components for running the VTR tape 6 14, such as a drum motor, a capstan motor, a drive circuit for these motors, etc., and a VTR tape 6 14 And scan the helical track (Fig. 16B) of the VTR tape 6 14 with the two sets of playback heads of the playback head 6 22. It should be noted that the tape running section 6 16 runs the VTR tape 6 14 at the same speed as the 1x speed playback even when the playback section 620 of the VTR device 6O1 performs double speed playback such as 2x speed playback.
- drum 820 of the recording head 612 and the drum 820 of the reproducing head 622 are actually the same.
- the VTR device 601 converts the video data VIN and the audio data AIN input from the outside into a compression encoding method such as the MPEG method by these components.
- the recording data is generated by compression encoding and recorded on a video tape (VTR tape) 6 14.
- the VTR device 61 reproduces the recorded data recorded on the VTR tape 614 by the non-tracking method, decompresses and decodes it, and outputs it as video data VOUT and audio data AOUT.
- each component of the recording unit 6 10 (FIG. 13) will be described.
- the video data compression circuit 700 forms an uncompressed video data VIN input from an externally connected editing device, for example, two frames constitute one G ⁇ P (GR0UP OF PICURE) In this way, the data is compressed and encoded by the MPEG method and output to the data packing circuit 720 as a compressed video data at a data rate of Nb ps.
- FIG. 14 is a diagram showing a configuration of a synchronization block of audio / video data to be recorded on the VTR tape 6 14 shown in FIG. 13.
- FIG. 14A is a diagram showing the data packing shown in FIG. Synchronization after adding sync data, identification data ID, outer code (OUTER PARITY) and inner code (INNER PARITY) to the audio / video data (VIDEO / AUDIO DATA) assembled by the circuit 720
- the block configuration is shown.
- Fig. 14 1 shows the data configuration in the horizontal direction (line; SYNC block) of the synchronization block shown in Fig. 14 ⁇ .
- the data packing circuit 720 (Fig. I3) consists of the compressed video data at the data rate Nbps input from the video data compression circuit 700 and the uncompressed audio data A input from the outside. ⁇ Assemble the UT into GOP units, generate audio / video data (VIDEO / AUDIO DATA) during the synchronization block shown in Fig. 14A, and output it to the outer code encoder circuit 70 .
- the outer code encoder circuit 704 stores the input audio / video data in the memory circuit 706, generates an outer code shown in FIG. 14A for the audio / video data, and adds it to the audio / video data. And outputs it to the inner code encoder circuit 708.
- the inner code encoder circuit 708 converts the audio / video data to which the outer code has been added into the inner code and outer code (by combining the inner code and outer code shown in Fig. 14A) in GOP units. P67, generally referred to as a product code), so as to exhibit the highest error correction capability, and generate and add the inner codes shown in FIGS. 14A and 14B.
- FIG. 15 is a diagram showing a data structure of the identification data ID shown in FIG. 14B.
- FIG. 15A corresponds to FIG. 14B, and each line of the recording format (SYNC Figure 15B shows the data structure of the identification data ID shown in Figure 15A.
- the first byte (1D0) of the identification data ID has a synchronization indicating the order in the helical track (Fig. 14B) where the line (SYNC block) is recorded. Enter the block ID (Sync Block ID).
- the most significant bit (MSB) of the second byte (ID 1) of the identification data ID contains the audio / video data ID (VIDE0 / AUDB10 ID), and the third to least significant bits (LSB) contains the track ID (TRACK ID).
- the audio / video data ID is the data in the data area of the line (SYNC block) (DATA: audio / video data (ViDEO / AUDiO DATA) or outer code (OUTER PARITY) shown in Fig. 14A).
- the track ID indicates whether the data is audio data or video data, and the track ID indicates the order of each helical track (FIG. 16B) GOP in which the line (SYNC block) is recorded.
- the 3rd byte (ID 2) of the identification data ID and the 1st and least significant bits of the 4th byte (ID 3) contain the history ID (HISTORICAL ID) audio 'video data 1 D (VIDE0 / AUDEI0 ID) is entered, and the fourth to second bits of the fourth byte contain the CYCLIC ID.
- the history ID (H [STORICAL ID]) indicates the history of processing such as editing added to the recorded data.
- the cyclic ID is incremented in G ⁇ P units, and indicates the order of audio / video data for every 8 GOPs.
- the recording head section 6 1 2 has two recording heads, modulates the recording data generated by the inner code encoder circuit 708 to generate a recording signal, and generates a recording head.
- FIGS. 168 to 16C are diagrams showing the recording format when recording data (recording signal; FIG. 14A) is recorded on the VTR tape 614 (FIG. 13).
- the recorded data is recorded over multiple helical tracks in GOP units, and as shown in Figures 16B and 16C, each helical track , Multiple lines (SYNC blocks) are recorded.
- SYNC blocks Multiple lines
- the equalizing section 624 has two sets of reproducing heads of the reproducing head section 622 (one set of reproducing heads has two positive azimuth heads and two negative azimuth heads, respectively). ) Equalize the recording signals read by each of them, reproduce the recorded data (Fig. 14A), and output them to the inner code correction section 626.
- the azimuth angle of the VTR tape 6 14 is one.
- only the playback head that is correctly tracing the helical track (Fig. 16B) of the VTR tape 614 can read the recorded signal correctly.
- the data rate of the recording data reproduced by the equalizer 624 becomes 8 Jbps as a whole when performing the quadruple speed reproduction.
- the inner code correction unit 6 2 6 converts the recorded data input from the equalization unit 6 It performs error detection and error correction using the code (Fig. 14A), and outputs the result to the non-tracking processing unit 628.
- the data rate when the recording head section 612 writes the recording data to the VTR tape 614 is Jbps as described above. If this recorded data is to be reproduced at 4 ⁇ speed, the data rate of the recorded data read out by the reproducing head section 62 2 is 8 Jbps.
- the non-tracking processing section 628 selects the data having the least error from the recording data input from the inner code correction section 626, and the memory section 630 is used for each line (SYNC block). To memorize.
- the non-tracking processing unit 628 arranges the recording data stored in the memory unit 630 into an array suitable for the processing of the outer code correction unit 632 (the inner code encoder circuit 708 (FIG. 13) ), And outputs the result to the outer code correction section 632.
- the outer code correction section 632 performs error correction on the recording data using the outer code (FIG. 14A) included in the recording data input from the non-tracking processing section 628, and outputs the data data. Output to packing section 6 3 4.
- the data depacking section 634 separates the audio / video data and identification data ID (Fig. 14B) from the input recording data and outputs it to the external and data thinning circuit 638 .
- the data decimation circuit 638 thins out the video data and audio data from the audio / video data input from the data depacking section 634, outputs the audio data AOUT to the outside, and outputs the video data.
- the data thinning circuit 638 takes out one frame of data for every four frames of data, for example, in the case of VTR device 61 or 4x playback, and displays it on a mobile device, for example. It is used to generate audio / video data at the same data rate as 1x speed playback.
- the video data expansion circuit 640 expands and decodes the video data input from the data thinning circuit 638 using an expansion decoding method corresponding to the compression encoding method of the video data compression circuit 700. Output to the outside as video data VOUT.
- the controller 600 outputs a recording speed request signal to the AV data input / output control circuit 50 shown in FIG. 7 as a control signal S500a.
- the controller 600 notifies the data rate of the non-real-time audio / video data to be recorded in the data recording / reproducing apparatus 3 by the recording speed request signal.
- the AV data input / output control circuit 50 outputs, to the controller 600, a recording speed approval signal for notifying that recording is possible at the notified data rate as a control signal S500a. I do.
- the AV data input / output control circuit 50 that has received the recording speed approval signal outputs a recording request signal to the recording / reproduction control circuit 34 via the control bus 20.
- the recording / playback control circuit 34 Upon receiving the recording request signal, the recording / playback control circuit 34 searches for an empty recording area in the storage device 26, and outputs an area allocation signal indicating the recording area allocated to the audio / video data requested to be recorded. Output to AV data input / output control circuit 50 and storage device 26.
- the AV data input / output control circuit 50 that has received the recording assignment signal outputs a recording permission signal to the controller 600 as a control signal S50a.
- the controller 600 having received the recording enable signal outputs a recording command signal to the AV data input / output control circuit 50 as a control signal S 50 a, and the AV data input / output control circuit 50
- the received recording command signal is output to the storage device 26 via the bus 20.
- controller 600 sends the playback speed approved by the recording speed approval signal to the respective processing circuits of the playback unit 620 of the VTR device 600 via the control signal S100. To instruct.
- the data is played back from the data packing section 6 3 4 at the specified playback speed.
- the audio / video data is output, and the audio / video data S 50 b is supplied to the AV data input / output control circuit 50.
- the audio / video data S 50 b supplied to the AV data input / output control circuit 50 is output to the storage device 26 via the data bus 22, and the storage device 26 outputs the audio / video data. Record the data S50b.
- the storage device 26 sends a recording completion notification signal to the AV data input / output control circuit 50 via the control bus 20. Is output.
- the AV data input / output control circuit 50 that has received the recording completion notification signal outputs a recording processing completion signal to the controller 600.
- a recording speed request signal as a control signal S50a to the controller 600 and the AV data input / output control circuit 50 shown in FIG.
- a control signal S500a for specifying the recording speed is supplied to the controller 600, and the controller 600 reproduces audio / video data at this speed.
- the respective processing circuits of the VTR device 61 may be controlled as described above. Hereinafter, the recording operation of the VTR 601 will be described.
- the video data compression circuit 700 compresses and encodes the video data V IN by the MPEG method so that, for example, two frames constitute one GOP.
- the data packing circuit 720 assembles the compressed video data input from the video data compression circuit 700 and the non-compressed audio data AOUT input from the outside into GOP units to produce audio / video data. (Fig. 14 A).
- the outer code encoder circuit 704 stores the input audio / video data in the memory circuit 706 and generates an outer code (FIG. 14A) for the recorded audio / video data. Add.
- the inner code encoder circuit 708 interleaves the audio and video data to which the outer code has been added, generates and adds the inner code (FIG. 14A and FIG. 14B), The SYNC and the identification data ID (Fig. 14A and Fig. 14B) are added to generate the recording data assembled in the synchronization block (Fig. 16A).
- the recording head section 612 modulates recording data to generate a recording signal, and records the recording signal on the VTR tape 614.
- the reproducing operation of the VTR device 61 will be described.
- the equalizing unit 62 equalizes the recording signal read from the VTR tape 614 by the two sets of reproducing heads of the reproducing head unit 622, and reproduces the recorded data (FIG. 14A). .
- the inner code corrector 6 26 performs error detection and error correction processing on the reproduced recorded data using the inner code (Fig. 14A), and outputs it to the non-tracking processor 6 28 .
- the non-tracking processing section 628 selects the data with the fewest errors from the error-detected and error-corrected recording data, stores the data in the memory section 630 line by line, and further performs the interleave processing. I do.
- the outer code correction section 632 performs error correction on the recording data using the outer code (FIG. 14A) included in the recording data input from the non-tracking processing section 628, respectively.
- the data depacking section 634 separates audio / video data and identification data ID (FIG. 14B) from the error-corrected recording data.
- the data thinning circuit 638 thins out audio and video data and generates audio and video data suitable for display on a monitor device.
- the video data decompression circuit 640 decompresses and decodes the video data input from the data decimation circuit 638, and outputs it as video data VOUT to the outside.
- the recording data (audio and video data) recorded on the VTR tape 614 can be reproduced by the non-tracking method.
- Playback of audio / video data using the non-tracking method eases the conditions related to tracking servo control.
- double-speed playback such as double, quadruple, and so on
- it is also possible to play at arbitrary speeds such as 2.1 times. Double-speed reproduction with a magnification of is possible.
- the case of azimuth angle or positive / negative binary values has been described.
- the number of azimuth angles is further increased, and the recording head section 6 1 2 and the playback head section 6 are used. It is also possible to provide a playback head corresponding to each of these azimuth angles in 22 to play back audio and video data.
- the magnification of the double-speed reproduction is limited by the operation speed of each component of the reproducing unit 620.
- the playback unit 620 cannot perform high-speed playback at a magnification higher than twice.
- the reproducing unit 650 shown in the seventh embodiment is used in the VTR device 601 instead of the reproducing unit 620, while suppressing the rotation speed of the drum 820 to the same as that at the time of 1 ⁇ speed reproduction.
- the purpose is to perform high-speed playback up to n-times speed playback.
- FIG. 17 is a diagram showing the configuration of the reproducing section 65 according to the present invention in the seventh embodiment.
- equalizing circuits 840, 84 2, 844 and 846 correspond to the equalizer 624 (Fig. 13).
- Each of the equalizing circuits 84, 84, 84, 84, 84, 46 has two positive azimuth and negative azimuth heads (Fig. 18).
- the equalizer 624 has an eight-circuit configuration as a whole.
- the positive azimuth head and negative azimuth head of the reproduction heads 824, 826, 828, 830 are collectively referred to simply as "reproduction head".
- the playback head 652 has a total of 16 playback heads, but the positive azimuth head and the negative azimuth head are symmetrical with respect to the rotation center of the drum 82.
- the VTR tape 614 is wound around the drum 820 for only half a turn. It is used alternately to support 16 playback heads, thereby suppressing an increase in circuit size.
- Inner code correction circuit 860 corresponding to equalizer circuits 84 0 and 842
- inner code correction circuit 862 corresponding to equalizer circuits 844 and 846
- buffering / distribution circuit Time sharing buffer, data distribute; BD circuit 864 and FIFO circuit (D1, D2) 866, 868 correspond to inner code correction section 626 (FIG. 13).
- Non-tracking processing circuit Outer code correction circuit corresponding to 880, 882
- Data depacking circuits 940, 942 corresponding to the outer code correction circuits 920, 922, FIFO circuits (Q and Q2) 944, 964 and data recombination circuits (DR; Data recombine (948) corresponds to the data depacking unit 634 (FIG. 13).
- Overnight depacking circuit 9 4 0, 94 2 Jog memory circuit corresponding to each 960 and 962 correspond to the jog memory section 636 (FIG. 13).
- a non-tracking processing circuit 880, a memory circuit 900, an outer code correction circuit 920, a data depacking circuit 940, and a jog memory circuit 9600 constitutes the first signal processing section 642
- a non-tracking processing circuit 882, a memory circuit 900, an outer code correction circuit 922, a data depacking circuit 9442, and a jog memory circuit 9 62 constitutes a seventh signal processing section 644.
- the signal processing systems 642 and 6444 are configured to process recording data in parallel.
- controller 600 controls the playback speed of the audio / video data in the playback unit 650.
- the control operation of controller 600 is substantially the same as the operation described with reference to FIG.
- the playback head for non-tracking system 652 (Fig. 17) has a helical track of VTR tape 5 14 on the tape running surface of drum 82. at intervals of duty of positive azimuth angle of the two-by-two to the playback head (net Masue' birds a! i, a 1 2 ( .A i), a 2].
- a 22 a 2) a 3 1, a 3 2 ⁇ A 3 ), a 4 i> a 42 (A 4 ), and positive azimuth angle reproduction head 8) to A 4 , for example, with respect to the rotation center of the drum 8 20 playhead negative azimuth angle positioned symmetrically two by two at a interval of one roll in a helical track (negative Ajimasuhe' de) bu, b 12 (B, ), b 21, b 22 (B 2) , b 3., b 32 (B 3 ), b, b 42 (B 4 ) and n (n ⁇ 1) playback heads 8 24, 8 26, 8 2 8, 8 3 0 Is arranged.
- the equalizer circuits 84, 84, 84, 84, and 46 are connected to the azimuth heads of the playback heads 82, 8, 26, 8, 28, 830. de a, ⁇ a 4 and Tsu KB to negative azimuth, .about.B 4 (Fig. 1 8), each recorded signal was equalized read, recorded data (Fig. 1 4 a) a playing inner code correcting unit 6 Output to 2 6
- the inner code correction circuits 860 and 862 are used to record at least double-speed reproduced data, that is, data at twice the data rate at 1x speed reproduction. It has the ability to perform error correction processing using the inner code for recording data at an overnight rate, and has a playback head 8 24, 8 26 and a playback head 8 28 8,
- the recording data input from 830 is processed in 8-bit parallel, and error detection and error correction are performed on the recording data using the inner code (Fig. 14A). Output.
- the BD circuit 864 buffers the data input from the inner code correction circuit 860, 862, and changes the routing according to the processing, and the FIFO circuits 866, 86 Output to 8
- the BD circuit 864 operates as the buffering operation of the FIF ⁇ circuits 866 and 868. Are controlled via control signals a 2 and b 2 .
- the FI FO circuits 866 and 868 buffer the recording data input from the BD circuit 864 under the control of the BD circuit 864, and the non-tracking processing circuits 880 and 882 respectively. Output to
- Each of the non-tracking processing circuits 880, 882 has the least error data among the recording data input from the inner code correction circuits 860, 862, respectively. Is selected and stored in the memory circuits 900 and 902 in units of lines (SYNC blocks).
- Each of the non-tracking processing circuits 880, 8822 further arranges the recording data stored in the memory circuits 900, 902 into an array suitable for processing by the outer code correction circuits 920, 922. (Dinterleave processing corresponding to the interleave processing in the inner code encoder circuit 708 (Fig. 13) is performed), and output to the outer code correction circuits 920, 922, respectively.
- the outer code correction circuits 920 and 922 use the outer code (Fig. 14A) included in the recording data input from the non-tracking processing circuits 880 and 882, respectively, for recording. Error detection and error correction are performed on the data and output to the data depacking circuits 940 and 942.
- the data depacking circuits 9400 and 9422 respectively separate audio / video data and identification data IDs (Fig. 14B) from the input recording data, and combine the identification data with the data recombining circuit 9. 4 and output audio and video data to each of the FIFO circuits 9 4 4 and 9 4 6 (depacking processing)
- Each of the FI FO circuits 944 and 946 buffers the audio and video data input from each of the data depacking circuits 940 and 942, and a data recombining circuit 94. Output to 8
- the data recombining circuit 948 uses the cyclic ID of the identification data ID input from the data depacking circuits 940 and 942 to form a FIFO circuit 944, 94.
- the order of the audio and video data input from 6 is returned to the original (in the order of recording), and the data is output to the data thinning circuit 638 (data recombination processing).
- the configurations and operations of the data thinning circuit 538 and the video data decompression circuit 640 are as described in the sixth embodiment. Hereinafter, the operation of the reproducing unit 650 will be described.
- FIG. 19 is a timing chart showing the operation timing of each component of the reproducing section 65 0 shown in FIG. 17.
- FIG. 19A is a VTR tape 6 14 (FIG. 13).
- Fig. 19B shows the NT pulse signal indicating the GOP boundary of the recording signal shown in Fig. 19A
- Fig. 19C shows the BD circuit.
- 864 shows the timing of resetting the FIF I circuit 866
- Fig. 19D shows the WR A signal (which specifies the timing at which the BD circuit 864 writes the recording data to the FIFO circuit 866).
- control signal a 2) indicates
- FIG 1 9 E shows a timing nontracking processing circuit 8 8 0 to read the recorded data from the FIF 0 circuit 8 6 6, Fig.
- FIG. 19G shows the timing when the BD circuit 864 writes the recording data to the FIFO circuit 868.
- the W RB signal (control Traffic light b 2 )
- Figure 19H shows the timing at which the non-tracking processing circuit 882 reads out the recording data from the FIFO circuit 868
- Figure 19I shows the timing at which the non-tracking processing circuit 8
- Fig. 19J shows the timing at which the recording data is output from the non-tracking processing circuit 880
- Fig. 19K shows the recording data output from the non-tracking processing circuit 882.
- FIG. 19L shows the timing at which the recording data is output from the non-tracking processing circuit 882.
- FIG. 19M shows a synchronizing signal which defines the timing at which the outer code correction circuit 920, 922 outputs recording data
- FIG. 19N shows an outer code correction circuit 920.
- Fig. 19 ⁇ shows the recording data output from the outer code correction circuit 922.
- Fig. 19 P shows the audio / video data output from the data recombining circuit 948. Is shown. Note that the asterisk in FIGS. 19B to 19H, 19J, and 19L indicates that the corresponding signal is negative logic.
- the tape running section 6 16 runs the VTR tape 6 14 at 4 times the speed at 1x speed playback, and the drum 8 20 rotates at the same rotation speed as at 1x speed playback, and the playback head section. 6 5 2 playback heads 8 24, 82 6, 8 28, 8 3 0 VTR tape on 4 sets, 8 positive azimuth heads and 4 sets, 8 negative azimuth heads 6 1 4 Trace the spiral track (Fig. 16B).
- the positive and negative azimuth heads of the reproduction heads 824, 826, 828, 830 are VTR tapes 61
- the data rate of the recording signal (recording data) read from 4 gradually increases for a while from the start of running and the start of rotation of the drum 820, and each reaches the target speed and becomes constant.
- the equalization circuits 84, 84, 84, 84, 46 equalize the read recording signals and reproduce the recorded data.
- the inner code correction circuits 860 and 862 generate an NT pulse signal (FIG. 19B) indicating the boundary of the recording GOP based on the reproduced recording data.
- the components after the inner code correction circuit 860, 862 perform processing in synchronization with the NT pulse signal.
- the inner code correction circuits 860 and 862 perform an error detection process and an error correction process using the inner code on the reproduced recorded data.
- the BD circuit 864 buffers the recording data for which error detection and the like have been performed, and if the cyclic ID (Fig. 15B) included in the recording data is an even number, 9 At the timing shown in D, the recording data is written to the FIF ⁇ circuit 866, and if it is odd, the FIF 0 circuit 866 is turned on at the rising edge of the NT pulse as shown in Figure 19C. Reset.
- the BD circuit 864 buffers the recording data on which error detection or the like has been performed, and if the cyclic ID included in the recording data is an odd number, the timing shown in FIG. Then, the recording data is written to the FIFO circuit 868, and if it is an even number, the FIF0 circuit 868 is reset at the rising point of the NT pulse as shown in FIG. 19F.
- the BD circuit 864 causes the FIFO circuits 866, 686 to alternately buffer the recording data according to whether the cyclic ID included in the recording data is odd or even. .
- the data rate is up to 8 J bps.
- the non-tracking processing circuits 880 and 882 read the recording data alternately from the FIFO circuits 866 and 868 at the timing shown in Fig. 19E and Fig. 19H, respectively, and buffer them. And select the recording data with a low error rate. Since the recording data is alternately read from the FI FO circuits 866, 868, the recording data read from the FI FO circuits 866, 868 to the non-tracking processing circuits 880, 882 are read. Will have a data rate of 4 Jb ps.
- Each of the non-tracking processing circuits 880 and 882 has the least error among the recording data input from the inner code correction circuits 860 and 862 of the inner code correction section 626, respectively.
- Fig. 19 The recording data that has been subjected to the din / reave processing at the timing shown in 9L is output to the outer code correction circuits 920 and 922. 19 I and Figure 19 K).
- the data rate between the correction circuits 920 and 922 is 2 J bps.
- the outer code correction circuits 920 and 922 perform an error correction process using the outer code (FIG. 14A) on the recording data that has been subjected to the din / leave processing. Redundant portions of the recording data are removed by the outer code correction circuits 920 and 922, and the data between the outer code correction circuit 920 and the data depacking circuit 940 and 942 is removed.
- the overnight rate is 2 x (N + L) bps.
- the data depacking circuits 9400, 9422 separate the audio data and video data from the recorded data and transmit the identification data (Odd ID. Even ID) to the data recombining circuit 948.
- the image data is output to the FIFO circuits 944, 946.
- the de-packing de-packing circuits 940, 942 also perform a jog shuttle reproduction process using the jog memory circuits 960, 962.
- Each of the FIFO circuits 944, 946 buffers audio and video data input from each of the data depacking circuits 9400, 9442, and synchronizes with the synchronization signal shown in Fig. 19M. Output to the data recombination circuit 948 (Fig. 19N and Fig. 190).
- the data recombining circuit 948 uses the cyclic ID of the input identification data ID to return the order of the audio and video data to the order of recording, and the data rate is four times that of 1x speed playback. Output to the external and de-thinning circuit 6 38 (Fig. 19 P) o
- the data thinning circuit 638 thins out the input audio and video data at a rate corresponding to the double-speed playback magnification, outputs audio data AOUT to the outside, and converts the video data into a video data decompression circuit. Output for 6400.
- the data thinning circuit 6 3 8 It thins out 34 of the data and generates audio and video data at the same data rate as the data rate at 1x speed playback.
- the video data expansion circuit 640 expands and decodes the video data to generate video data VOUT, and outputs it to the outside.
- the operation speed in the case where quadruple-speed playback is performed in the playback unit 650 having each component in a parallel configuration will be further described.
- FIG. 20 is a diagram showing the relationship between the overhead related to the non-tracking processing and the bus bandwidth.
- FIG. 20A shows the non-tracking of the reproducing unit 62 shown in FIG. Overhead related to non-tracking processing in the bus bandwidth between the memory processing unit 628 and the memory unit 6330, and the recording data from the memory unit 6300 to the outer code correction unit 632.
- FIG. 20B shows the relationship between the bus bandwidth that can be used for reading, and FIG. 20B shows the non-tracking processing circuit 880, 882 and the memory circuit 900, of the reproducing unit 650 shown in FIG.
- the data rate when the recording head section 612 writes the recording data to the VTR tape 614 is Jbps as described above.
- the data rate of the recorded data read out by the reproducing head 652 is 8 Jbps.
- the circuit for performing error detection and error correction using the inner code is divided into two systems, an inner code correction circuit 860 and 862, and the inner code correction circuit 860, 862 Since the bit parallel processing is performed, the operating frequency of the inner code correction circuits 860 and 862 is 4 ⁇ JZ8 Hz.
- the operating frequency is lower than the operating frequency (50 MHz) when the configuration of the raw part 62 is adopted (Fig. 13). Therefore, if the configuration shown in the seventh embodiment (FIG. 17) is adopted, the inner code correction circuits 860, 862 and other components are configured using, for example, a normal CMOS logic element. It can be seen that there is no need to use special high-speed operation parts.
- the operating frequency of the non-tracking processing circuits 880 and 882 is 25 MHz under the above conditions.
- the transfer frequency of the recording data between the non-tracking processing circuits 880, 882 and the memory circuits 900, 902 can be suppressed to 12.5 MHz (at the time of 8-bit parallel).
- the bus bandwidth of the data bus between the non-tracking processing circuit 880, 882 and the memory circuit 90C, 902 is, for example, about 75 MHz (75MBps) which is a very common value.
- the bus bandwidth 25 MHz required for writing the recording data to the memory circuits 900, 902 is reduced, and the outer code correction circuit 920, 922 from the memory circuits 900, 902 is reduced.
- the bus bandwidth that can be used for reading recorded data to the HDD is 50 MHz.
- the overhead related to the non-tracking processing of the bus bandwidth between the non-tracking processing circuit 880, 882 and the memory circuit 900, 902 is 12.5. MHz, indicating that data transmission (OUTER READ) from the memory circuit 900, 902 to the outer code correction circuit 920, 922 can be performed in a very short time (Fig. 20B). .
- FIG. 21 shows the overhead related to non-tracking processing and the non-tracking processing.
- FIG. 21A is a diagram showing the relationship between the processing capacity required for processing components and the bus bandwidth.
- FIG. 21A shows the relationship between the non-tracking processing unit 628 of the reproducing unit 62 shown in FIG. FIG.
- 21B shows the relationship between the overhead related to non-tracking processing in the bus bandwidth between the memory unit 630 and the processing capacity required of the non-tracking processing unit 628, and FIG.
- the processing power required for the non-tracking processing circuits 880 and 882 are examples of the processing circuits 880 and 882.
- the time required to transfer one GOP of data from the memory circuit 900, 902 to the outer code correction circuit 920, 922 is a process of recording data of one GOP.
- the processing time A (GOP time) is 1/4 (2 12.5MHz / 50MHz), so the processing capacity A of the non-tracking processing circuits 880, 882 can be relatively small ( Figure 21B).
- the time required to transfer 1 GOP of data from the memory section 630 to the outer code correcting section 632 is equivalent to the processing of 1 G ⁇ P of recorded data. It takes 1/2 of the time T (GOP time) required, so that the non-tracking processing unit 628 requires a high processing capacity A (Fig. 21B).
- non-tracking processing circuits 880 and 882 are formed of the same components, more non-tracking processing sections 628 and 8 can perform more processing operations than the non-tracking processing section 628, and the same processing performance is required. In this case, it is possible to use a general component whose operation speed is lower than that of the non-tracking processing unit 628.
- FIG. 22 is a diagram illustrating a configuration in a case where the recording unit is reproduced at a reproduction speed of 650 ⁇ 1 ⁇ speed shown in FIG.
- the reproducing unit 650 reproduces the recorded data at 1 ⁇ speed (normal reproducing speed), for example, the BD circuit 864 is replaced by the inner code correcting circuits 860, 8
- the recording data input from any of 6 2 is routed so as to be output to the FIFO circuits 8 6 6 and 8 6 8 .
- the signal processing system 6 4 2 and the FIFO circuit 9 4 4 operate, and the signal processing system.
- the 644 and FIF ⁇ circuit 964 do not perform any processing.
- the playback head of the playback head section 652, 824, 826, 828, 830 (Fig. 18), for example, the playback head 8 Only the recording signal read by 24 is used.
- the tape running section 6 16 allows the VTR tape 6 14 to run at the speed at 1 ⁇ speed playback, and the drum 8 20 rotates at the rotation speed at 1 ⁇ speed playback.
- the equalizing circuit 840 equalizes the recording signal read by the reproducing head 824 and reproduces the recorded data.
- the inner code correction circuit 860 performs error detection and error correction on the recording data using the inner code.
- the BD circuit 864 buffers the recording data and outputs the data to the signal processing system 642 via the FIFO circuit 866.
- the signal processing system 642 performs non-tracking processing, error correction using an outer code, and depacking processing on the recorded data, and sends the data to the data recombining circuit 948 via the FIFO circuit 944. Output to
- the data recombining circuit 948 performs a data recombining process, and outputs 1x audio / video data to the outside.
- the recorded data is read from the VTR tape 614 using not only the playback head 824 but also the playback head 826, 828, and the signal processing system 624, 644 is used. May be used in parallel to reproduce three pieces of recorded data, and take a majority vote to make the recorded data more reliable.
- the reproducing unit 650 is used to reproduce the recording data (recording signal) recorded on the VTR tape 614 at the double speed by the recording unit 610 of the VTR device 601 (FIG. 13). The operation in this case will be described.
- the BD circuit 864 can be used for recording data input from either the inner code correction circuit 860 or 862. Is also output to the FI FO circuit 8 6 6, 8 6 8, and only the signal processing system 6 4 2 and the FIF ⁇ circuit 9 4 4 operate, and the signal processing system 6 4 4 and the FIF ⁇ Circuit 946 does not perform any processing.
- the playback head 8 52, 8 26, 8 2 8, 8 3 0 (Fig. 18) of the playback head 6 52 for example, the playback head 8 2 Only the recording signals read by 4, 8 26 are used.
- the tape running section 6 16 runs the VTR tape 6 14 at twice the speed of the 1 ⁇ speed playback, and the drum 8 20 rotates at the rotation speed at the 1 ⁇ speed playback.
- the equalizing circuits 84 0 and 84 2 equalize the recording signals read by the reproducing heads 8 24 and 8 26, respectively, and reproduce the recorded data.
- the inner code correction circuit 860 performs error detection and error correction on the recording data using the inner code.
- the BD circuit 864 buffers the recording data, and outputs it to the signal processing system 642 via the FIFO circuit 866.
- the signal processing system 6 4 2 performs non-tracking processing and outer code
- the error correction and depacking processing used are performed, and the result is output to the decombining circuit 948 via the FIFO circuit 944.
- the inner code correction circuit 860, the BD circuit 864, and the signal processing system 640 can operate independently at the processing speed related to double-speed playback.
- the data recombining circuit 948 performs data recombining processing and outputs a 1x audio / video data to the outside.
- VTR tape 6 14 For example, as in the case of 1 ⁇ speed playback, recording from VTR tape 6 14 using not only playback heads 3 24 and 8 26 but also playback heads 8 28 and 8 30
- the data is read out, and the same two recorded data are reproduced two by two by using the signal processing systems 642 and 644 in parallel, and the recorded data is matched to obtain the reliability of the recorded data. It may be operated so as to enhance the performance. Operation when the head is closed
- the playback head 8 24 when playing back recorded data using the playback head 82 4, the playback head 8 24 causes head clogging and the recorded data cannot be played back normally. Failure may occur.
- the error rate of the recorded data detected by the inner code correction circuit 860 increases.
- the reproduction is performed in place of the reproduction head 824
- the recording data (recording signal) is read out by using the heads 826, 828, and 830 sequentially, and the reproduction process is performed.
- the reproducing section 650 By configuring the reproducing section 650 in this way, even if a head clog occurs in any of the reproducing heads S24, 82, 828, 8330, the recorded data can be correctly reproduced. Can live. Operation during shuttle playback
- the shuttle playback means that the VTR tape is run at an arbitrary speed (m times, m ⁇ l) different from the running speed when the recorded data is played back at 1 ⁇ speed from the VTR tape 6 14 and the playback head is set to 1 speed.
- This is a playback method that uses only the audio and video data as much as possible and is different from the double-speed playback that requires all audio and video data to be played.
- the case of 1 ⁇ imI is called jog reproduction, and the case of 1 ImI is called shuttle reproduction.
- the tape running section 6 16 runs the recorded data from the VTR tape 6 14 at an arbitrary speed, uses only the playback head 8 24, and the drum 8 20 rotates at a rotation speed corresponding to the tape running speed.
- the helical track of the VTR tape 614 is scanned by the playback head 824 of the playback head section 652 (FIG. 18).
- the playback head 824 reads the recording signal from the VTR tape 614.
- the equalizing circuit 840 equalizes the read recording signal and reproduces the recorded data.
- the inner code correction circuit 860 performs an error detection process and an error correction process on the reproduced recording data using the inner code.
- the BD circuit 864 is designed so that as much continuous GOP as possible can be input to the non-tracking processing circuits 880, 882, up to the processing capacity of the non-tracking processing circuits 880, 882. All the recording data on which the error correction or the like has been performed is output to the non-tracking processing circuit 880 via the FIFO circuit 866.
- the BD circuit 864 is, for example, a non-tracking processing circuit 880 If there is a capacity to process k GOP (k> 1) of recorded data within 0 P time (Fig. 21), k G ⁇ P minutes that are continuous and correlated every 1 GOP time The recording data is output to the non-tracking processing circuit 880, and the recording data that cannot be processed by the non-tracking processing circuit 880 is discarded.
- the non-tracking processing circuit 880 sequentially buffers the recording data of k GPs input through the FIF 0 circuit 866 to the memory circuit 900 and has a low error rate. Select the recording data and perform the interleave processing on the selected recording data.
- the outer code correction circuit 920 performs an error correction process using an outer code (FIG. 14A) on the recording data that has been subjected to the ding-removing process.
- the data depacking circuit 940 separates audio and video data from the recorded data, buffers the data in the jog memory circuit 960, and reconnects the data via the FIF circuit 944. Output to
- the de-multiplexing circuit 948 passes the input audio / video data and outputs it to the data thinning circuit 638.
- the data thinning circuit 6 3 8 also passes the input audio / video data, outputs the audio data AOUT to the outside, and outputs the video data to the video data expansion circuit. Output for 6400.
- each component of the VTR device 61 and the reproducing units 62 and 65 shown in each of the embodiments described above is configured by software as long as the same function and performance can be realized. Or hardware.
- the number of playback heads in the playback head section 652 is an example.
- the tape drive section 616, the drum 820, and the playback section 650 of the VTR device 601 are appropriately controlled, particularly, the jog memory circuits 960, 962.
- double-speed playback at integer multiples double-speed playback at non-integer magnifications such as 2.1 times is possible.
- the VTR device 601 is developed because the conditions for the operating speed of the components are moderate. There is no need to use special high-speed components. Therefore, when development is promoted using general parts, and high-speed operation parts become inexpensive and general, the components composed of general parts are replaced to further improve performance. Phased development is possible, and development costs are low.
- the quality of audio / video data obtained by jog shuttle reproduction can be improved.
- VTR apparatus non-tracking type reproduction apparatus capable of performing double-speed reproduction while using mechanical components having the same accuracy as a VTR apparatus performing 1-time reproduction. be able to.
- a non-tracking type data reproducing apparatus capable of performing double-speed reproduction without using special high-speed operation parts is provided for an equalization processing circuit or an error correction processing circuit. can do.
- the performance of other special reproduction processing functions for example, a jog shuttle reproduction function, can be enhanced by utilizing the components used for realizing double-speed reproduction.
- the video data recording / reproducing device, audio / video data recording / reproducing device and its system, and the data reproducing device according to the present invention are an editing system used for video editing in a television broadcasting station or the like, and an audio system. 'Applicable to server systems that store and manage video data.
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Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US08/860,537 US6611652B1 (en) | 1995-11-15 | 1996-11-15 | Video data recording/reproducing system, audio/video data recording/reproducing device, its system, and data reproducing device |
DE69636593T DE69636593T2 (de) | 1995-11-15 | 1996-11-15 | Vorrichtung zur aufnahme/wiedergabe von fernseh-/tondaten |
EP96938487A EP0805589B1 (en) | 1995-11-15 | 1996-11-15 | Audio/video data recording/reproducing apparatus |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP7/297224 | 1995-11-15 | ||
JP29722495A JPH09139019A (ja) | 1995-11-15 | 1995-11-15 | 磁気テープデータ再生装置 |
JP7/332296 | 1995-12-20 | ||
JP33229695A JP3704771B2 (ja) | 1995-12-20 | 1995-12-20 | 音声・映像データ記録・再生装置およびそのシステム |
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WO1997018671A1 true WO1997018671A1 (fr) | 1997-05-22 |
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PCT/JP1996/003367 WO1997018671A1 (fr) | 1995-11-15 | 1996-11-15 | Systeme d'enregistrement/reproduction de donnees video, dispositif d'enregistrement/reproduction de donnees audio/video, son systeme, et dispositif de reproduction de donnees |
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US (1) | US6611652B1 (ja) |
EP (1) | EP0805589B1 (ja) |
KR (1) | KR100462420B1 (ja) |
DE (1) | DE69636593T2 (ja) |
WO (1) | WO1997018671A1 (ja) |
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Publication number | Priority date | Publication date | Assignee | Title |
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JP2001215997A (ja) * | 2000-01-31 | 2001-08-10 | Olympus Optical Co Ltd | 音声記録装置、情報処理装置、及び情報処理プログラムを記録した記録媒体 |
US7668455B2 (en) * | 2004-12-20 | 2010-02-23 | Fujifilm Corporation | Image capturing apparatus, image capturing method, reproducing apparatus, reproducing method and program |
JP4284370B2 (ja) * | 2007-03-09 | 2009-06-24 | 株式会社東芝 | ビデオサーバ及びビデオ編集システム |
US20120105719A1 (en) * | 2010-10-29 | 2012-05-03 | Lsi Corporation | Speech substitution of a real-time multimedia presentation |
JP5979948B2 (ja) | 2012-04-11 | 2016-08-31 | キヤノン株式会社 | 画像データ送信装置及び画像データ受信装置 |
JP5979949B2 (ja) * | 2012-04-11 | 2016-08-31 | キヤノン株式会社 | 画像データ送信装置及び画像データ受信装置 |
KR101577055B1 (ko) | 2015-06-29 | 2015-12-21 | 반성욱 | 원목 절단 장치 및 방법 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06236506A (ja) * | 1993-02-08 | 1994-08-23 | Aiwa Co Ltd | ノントラッキング方式の再生装置 |
JPH06236505A (ja) * | 1993-02-08 | 1994-08-23 | Aiwa Co Ltd | ノントラッキング方式の再生装置 |
JPH08115547A (ja) * | 1994-10-14 | 1996-05-07 | Sony Corp | 再生装置 |
JPH08289246A (ja) * | 1995-04-14 | 1996-11-01 | Sony Corp | 映像素材編集システム |
JPH08336101A (ja) * | 1995-06-08 | 1996-12-17 | Sony Corp | ビデオデータ記録装置とその方法、ビデオデータ記録媒体、および、ビデオデータ再生装置とその方法 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2111288B (en) * | 1981-11-20 | 1985-04-11 | Sony Corp | Magnetic tape recording and reproducing arrangements |
JPS62140203A (ja) * | 1985-12-13 | 1987-06-23 | Pioneer Electronic Corp | 回転ヘツド式デジタル信号再生装置 |
GB2225685B (en) * | 1988-11-30 | 1993-05-05 | Sony Corp | Television signal editing |
US5164839A (en) * | 1988-12-27 | 1992-11-17 | Explore Technology, Inc. | Method for handling audio/video source information |
US5267351A (en) * | 1989-12-22 | 1993-11-30 | Avid Technology, Inc. | Media storage and retrieval system |
EP0581307B1 (en) * | 1992-07-31 | 1999-10-06 | Canon Kabushiki Kaisha | Recording and/or reproducing apparatus having rotary heads |
DE69431048T2 (de) * | 1993-12-10 | 2003-02-13 | Sony Corp | Datenaufzeichnungsträger und datenwiedergabegerät |
DE69428180T2 (de) * | 1993-12-13 | 2002-05-02 | Sony Corp | Schnittsysteme und -verfahren |
US5535137A (en) * | 1994-02-14 | 1996-07-09 | Sony Corporation Of Japan | Random access audio/video processor with compressed video resampling to allow higher bandwidth throughput |
WO1995025400A1 (fr) * | 1994-03-16 | 1995-09-21 | Sony Corporation | Editeur d'images |
US5828841A (en) * | 1994-10-31 | 1998-10-27 | Sony Corporation | Video signal recording and reproduction apparatus |
JP3456064B2 (ja) * | 1995-09-08 | 2003-10-14 | ソニー株式会社 | 音声・映像データ記録・再生装置 |
-
1996
- 1996-11-15 DE DE69636593T patent/DE69636593T2/de not_active Expired - Fee Related
- 1996-11-15 US US08/860,537 patent/US6611652B1/en not_active Expired - Fee Related
- 1996-11-15 WO PCT/JP1996/003367 patent/WO1997018671A1/ja active IP Right Grant
- 1996-11-15 KR KR1019970704728A patent/KR100462420B1/ko not_active IP Right Cessation
- 1996-11-15 EP EP96938487A patent/EP0805589B1/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06236506A (ja) * | 1993-02-08 | 1994-08-23 | Aiwa Co Ltd | ノントラッキング方式の再生装置 |
JPH06236505A (ja) * | 1993-02-08 | 1994-08-23 | Aiwa Co Ltd | ノントラッキング方式の再生装置 |
JPH08115547A (ja) * | 1994-10-14 | 1996-05-07 | Sony Corp | 再生装置 |
JPH08289246A (ja) * | 1995-04-14 | 1996-11-01 | Sony Corp | 映像素材編集システム |
JPH08336101A (ja) * | 1995-06-08 | 1996-12-17 | Sony Corp | ビデオデータ記録装置とその方法、ビデオデータ記録媒体、および、ビデオデータ再生装置とその方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0805589A4 * |
Also Published As
Publication number | Publication date |
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EP0805589A1 (en) | 1997-11-05 |
DE69636593D1 (de) | 2006-11-16 |
EP0805589B1 (en) | 2006-10-04 |
EP0805589A4 (en) | 2003-06-25 |
US6611652B1 (en) | 2003-08-26 |
KR19980701339A (ko) | 1998-05-15 |
DE69636593T2 (de) | 2007-08-16 |
KR100462420B1 (ko) | 2005-08-29 |
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