• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Apparatus permits the use of a compact audio disc to provide digital data information other than audio signals without requiring a change of format of the audio disc and involving only minor changes to existing digital audio disc playback apparatus. Data signals are rearranged to permit searching of the data information in a fashion compatible with existing digital audio disc playback apparatus and maintaining consistency with respect to signal format and signal processing, such as error correcting and recording data format presently used in compact digital audio discs.
    公开号:SU1741619A3
    申请号:SU843784991
    申请日:1984-08-28
    公开日:1992-06-15
    发明作者:Фурукава Сунсуке；Сузуки Тадао；Йоханнес Бернардус Мария Монен Маритус
    申请人:Н.В.Филипс Глоэлампенфабрикен (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to disc playback devices using a disc on which basic and additional digital data are recorded for selective reproduction,
    The purpose of the invention is to increase the reliability of reproduction of digital information.
    FIG. 1, 2 shows charts of CD recording data; in fig. 3 is a diagram of the location of one data block during recording; in fig. 4 is a block diagram of an apparatus for reproducing digital information; in fig. 5 is a word format diagram of sequential data.
    The device (FIG. 4) contains a compact disk 1, on which a digital signal of the format shown in FIG.
    I.2. The disk 1 is rotated by the spindle of the motor 2 axial movement, regulated by the second driver 3 control signals, i.e. with constant linear velocity.
    The optical readout unit 4 has a laser source, a beam splitter, an optical system, a photoreceiver unit for a reflected beam, and the like. Unit 4 can be moved in the radial direction with the help of an electric motor 5, controlled by the first driver b of control signals. The block 4 is associated with a focus and radial tracking control unit 7. The signal of block 4 is fed through amplifier 8 to digital demodulator 9, which contains block 10 of playback of clock bits. Modulation of the EFM type 1 disk is a blocking method for converting 8-bit data into a preferred 14-bit set.
    The sub-coding signal from the modulator 9 is fed to the system controller 11, equipped with a central processor and controlling the rotation of the disk 1. The screw feed is read by block 4 and the like. The output data of the main data from the demodulator 9 is fed to the error correction block 12 of receiving the basic digital data of the read block containing the RAM 13. error correction circuit 14, terminals 15 for connecting digital-to-analog converters when playing audio data, and converter 16 to serial data from which through the interface 17 enters the controller
    I1.With the interface 17, the shaper 18 of the instructions for reading addresses is also connected, for example, in the form of a microcomputer, setting the read address and sending a -1 signal in addition to this address
    management The list of recording areas is recorded on the lead-in track in the innermost section, and disc 1 uses the sub-coding signal as an address. This list
    reproduced in its original state to start reading disc 1, and read by shaper 18.
    For a serial output from converter 16, one word consists of 32 bits, the first four bits are the preamble, the next four are auxiliary audio data bits, the next 20 bits are a digital audio sample. In the case when the digital audio reading consists
    out of 16 bits, 16 bits are inserted from the least significant bit (ISB). After the digital audio reading, four bits are added: the first bit (V) is a flag, the U bit is each bit of the sub-coding signal,
    Bit C is the identification bit of the beginning, and Bit P is the parity bit.
    Shaper 18 first executes a read command for a given address. This address is the absolute duration.time indication code in the Q-channel. The controller 11, observing the sub-coding signal reproduced by block 4, controls the driver b to move the head to the location
    near the desired location of the signal remover.
    One frame Fr consists of 588 bits (Fig. 1) and has a frame sync pulse Fs from a given set of bits, followed by
    3-bit RB limit signals. Next, bits 0-32 of the DB data are alternately recorded, of which the zero bits are called a sub-coding signal or user bits. 1-12 and 17-28 bits
    data intended for the audio data of the main channel. The remaining bits 13-16 and 29-32 are for parity data of the error correction code of the main channel. Each of the data bits consists
    of the 14 bits into which 8-bit data is converted.
    FIG. 2 shows the structure of one block (98 frames) in which the frames are arranged in parallel one after the other. For the Q-channel, cyclic redundancy check codes are inserted in the last 16 of 96 frames. The P-channel signal is a flag to indicate the music program.
    and pauses and has a lower level in the continuation of the program and a large level - in the pause, and in the output section has pulses with a frequency of 2 Hz. Other channels from R to W may be used for voice guidance or explanation.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    A device for reproducing digital information containing an axial displacement motor, on which a disk optical recording medium is mounted, located opposite an optical readout unit equipped with a laser and kinematically connected with a radial displacement motor, the input of which is connected to the output of the first driver of control signals, the second driver of control signals connected by the output to the input of the axial movement motor, the driver of the address reading commands, connected through an interface with a system controller, a control unit for focusing and radial tracking of the recording track, connected by outputs to the inputs of an optical readout unit connected by an output through an amplifier and demodulator to the inputs of the error correction block for receiving basic digital data
    0
    five
    0
    a readable unit, output connected via an interface with a system controller, to which control signal drivers are connected and the input of the focus control unit and radial tracking of the recording track, and the optical recording medium is made with a spiral recording track having sequentially recorded digital data blocks and blocks sub-digital data, combined into groups corresponding to a sub-digital information unit, characterized in that. that, in order to increase the reliability of the reproduction of digital information, the output of the sub-digital information of the demodulator is connected to the system controller, and each block of basic digital data on the spiral recording track of the optical recording medium disk contains a specified number of frames equal to or multiple times the group having the address defined by the relevant auxiliary data
    25
    f & btts)
    RB (3bits)
    AB
    RB
    in
    Fo
    F1 F2 F3
    AND I
    Fig 1
    Rya
    in (1-zg
    FIG. 2
    Ults
    LSB
    Fig.Z
    24 bits
    MSB
    5
    I ITT
    VUC P
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    引用文献:
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    NL7602015A|1976-02-27|1977-08-30|Philips Nv|MEMORY SYSTEM.|
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    US4161753A|1977-07-08|1979-07-17|International Business Machines Corporation|Video recording disk with interlacing of data for frames on the same track|
    JPS5913101B2|1977-12-16|1984-03-27|Hitachi Ltd|
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    CA1159949A|1980-04-18|1984-01-03|Yoshitaka Hashimoto|Digital video data recording apparatus|
    CA1161946A|1980-07-26|1984-02-07|Sony Corporation|Method and apparatus for recording digitizedinformation on a record medium|
    JPS649679B2|1980-08-08|1989-02-20|Sony Corp|
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    JPH0327994B2|1981-09-14|1991-04-17|Sony Corp|
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    DE3277512D1|1981-12-01|1987-11-26|Matsushita Electric Ind Co Ltd|Optical recording and reproducing disc|
    JPS58107738A|1981-12-21|1983-06-27|Sanyo Electric Co Ltd|Transmitting method for additional information|
    AT19167T|1982-01-25|1986-04-15|Discovision Ass|RECORDING AND PLAYING BACK SELECTED AUDIO MESSAGES FROM A MESSAGE BLOCK ON A RECORDER.|
    JPS58133689A|1982-02-02|1983-08-09|Sony Corp|Digital audio disc device|
    CA1196106A|1982-04-28|1985-10-29|Tsuneo Furuya|Method and apparatus for error correction|
    US4534031A|1982-08-02|1985-08-06|News Log International|Coded data on a record carrier and method for encoding same|
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    JPS60217567A|1984-04-13|1985-10-31|Matsushita Electric Ind Co Ltd|Data recording method|
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    法律状态:
    优先权:
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    JP58161514A|JPH0634304B2|1983-09-01|1983-09-01|Disk playback device|
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