Audio digital recording and playback system

Details Audio digital recording and playback system Audio digital recording and playback system

1984-09-17

1987-01-13

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Converting an analog signal to digital form for recording;...

381 51, G11B 500, G10L 502

Patent

active

046368760

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 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 analog signal.

REFERENCES:
patent: 4164020 (1979-08-01), Griffith
patent: 4368988 (1983-01-01), Tahara et al.
patent: 4441201 (1984-04-01), Henderson et al.
patent: 4458110 (1984-07-01), Mozer
patent: 4519027 (1985-05-01), Vogelberg

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