Adaptive differential pulse code modulation decoding circuit

Details Adaptive differential pulse code modulation decoding circuit Adaptive differential pulse code modulation decoding circuit

1983-12-05

1986-02-18

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

332 11D, 340347DD, H04B 1406

Patent

active

045717370

ABSTRACT:
In an APDCM decoding circuit, an adaptive inverse quantizer which forms a quantized coded signal, produces a residual signal and upper and lower limits thereof. An adaptive prediction circuit uses the residual signal to predict a quantization, which is added to the other signals. The added residual is converted into a nonlinear encoded PCM for output. However the output is PCM linearized and compared to the added upper and lower limits to determine if the output should be incremented or decremented.

REFERENCES:
patent: 4179710 (1979-12-01), Ishiguro et al.
patent: 4319082 (1982-03-01), Gilloire et al.
patent: 4437087 (1984-03-01), Petr
"Proceedings of ICASSP 82" published by IEEE, May, 1982, pp. 960 to 963.
"Transactions on Communications" pp. 1362 to 1365, published by IEEE, in the year of 1975.
"Proceedings of IEEE", Apr. 1980, pp. 488 to 525.

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