AUDIO DIGITAL RECORDING AND PLAYBACK SYSTEM
    2.
    发明申请
    AUDIO DIGITAL RECORDING AND PLAYBACK SYSTEM 审中-公开
    音频数字录音和回放系统

    公开(公告)号:WO1984004195A1

    公开(公告)日:1984-10-25

    申请号:PCT/US1984000605

    申请日:1984-04-19

    CPC classification number: G11B5/012 G11B20/10

    Abstract: A microcomputer system for converting an analog signal, such as an audio signal representative of sound into a digital form for storing in digital form in a highly condensed code and for reconstructing the analog signal from the coded digital form. The system includes reductive analytic means where the original digital data stream is converted to a sequential series of frequency spectrograms, signal amplitude histograms and waveform code tables. Approximately 100 times less storage space than priviously required for the storage of digitized audio signals of high fidelity quality is thereby obtained. Additive synthesis logic interprets the stored codes and recreates an output digital data stream for digital to analog conversion that is nearly identical to the original analog signal.

    AUDIO DIGITAL RECORDING AND PLAYBACK SYSTEM.
    3.
    发明公开
    AUDIO DIGITAL RECORDING AND PLAYBACK SYSTEM. 失效
    音频数字记录和重放系统。

    公开(公告)号:EP0140957A4

    公开(公告)日:1988-02-03

    申请号:EP84901887

    申请日:1984-04-19

    Applicant: COMPUSOUND INC

    CPC classification number: G11B5/012 G11B20/10

    Abstract: A microcomputer system for converting an analog input signal, such as an audio signal representative of sound into a digital form for storing in digital form in a highly condensed code and for reconstructing the analog signal from the coded digital form is disclosed. The system includes reductive analytic means where the original digital data stream is converted to a sequential series of frequency spectrograms, signal amplitude histograms and waveform code tables. Approximately 100 times less storage space than previously required for the storage of digitized audio signals of high fidelity quality is thereby obtained. Additive synthesis logic interprets the stored codes and recreates an output digital data stream for digital to analog conversion that is nearly identical to the original source material.

    AUDIO DIGITAL RECORDING AND PLAYBACK SYSTEM
    4.
    发明公开
    AUDIO DIGITAL RECORDING AND PLAYBACK SYSTEM 失效
    音频数字记录和重放系统。

    公开(公告)号:EP0140957A1

    公开(公告)日:1985-05-15

    申请号:EP84901887.0

    申请日:1984-04-19

    CPC classification number: G11B5/012 G11B20/10

    Abstract: Système à micro-ordinateur permettant de convertir un signal analogique, tel qu'un signal audio représentant un son, en une forme numérique en permettant le stockage numérique à l'aide d'un code très condensé et de reconstruire le signal analogique à partir de la forme numérique codée. Le système comprend des organes analytiques réducteurs où le courant de données numériques originales est converti en une série séquentielle de spectrogrammes de fréquence, d'histogrammes d'amplitude de signaux et de tableaux de codes de formes d'ondes. On parvient ainsi à réduire d'environ 100 fois l'espace de stockage nécessaire antérieurement pour le stockage de signaux audio numérisés à haute fidélité. Une logique à synthèse additive interprète les codes stockés et recrée pour la conversion numérique/analogique un courant de données numériques de sortie qui est presque identique au signal analogique original.

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