Apparatus and method of reducing the bit rate of PCM speech

Details Apparatus and method of reducing the bit rate of PCM speech Apparatus and method of reducing the bit rate of PCM speech

1982-02-11

1984-11-06

Kemeny, E. S. Matt

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

340347DD, 375122, G10L 100, H03K 1322, H04B 166

Patent

active

044816596

ABSTRACT:
Bit rate in a PCM Companding system is reduced by transmitting sample magnitude (X.sub.n) if the sample is near a zero-crossing, and transmitting the difference (D.sub.n) between sequential samples if not near a zero-crossing. ROMs are used for mapping (transforming) full versus reduced data.

REFERENCES:
patent: 3559068 (1971-01-01), Almering et al.
patent: 3602818 (1971-08-01), Carrette
patent: 3674939 (1972-07-01), Brooks
patent: 3707680 (1972-12-01), Gabbard et al.
patent: 3784737 (1974-01-01), Waehner
patent: 3945002 (1976-03-01), Duttweiler et al.
patent: 4002841 (1977-01-01), Ching et al.
patent: 4005274 (1977-01-01), Vagliami et al.
patent: 4314105 (1982-02-01), Mozer
patent: 4375013 (1983-02-01), Cointot et al.

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