Digital DPCM-coder having a high processing speed

Details Digital DPCM-coder having a high processing speed Digital DPCM-coder having a high processing speed

1983-08-16

1985-08-20

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

332 11D, H04B 1204, H03K 1322

Patent

active

045368805

ABSTRACT:
In an improved digital DPCM-coder having a high calculating speed, a second quantizer is provided which is supplied with a DPCM-signal determined in a calculating loop, and which emits from its output a quantized DPCM-signal multiplied by a prediction factor. With the improved coder, one calculating operation less is required, and the coder can process a higher PCM-data rate at a constant calculating speed of the components.

REFERENCES:
patent: 4468790 (1984-08-01), Hofelt
patent: 4470146 (1984-09-01), Yatsuzuka et al.
"A Real-Time Adaptive Predictive Coder Using Small Computers", Aaron J. Goldberg, IEEE Transactions on Communications, vol. Com-23, No. 12, Dec. 1975.
"Comparison of Adaptive Linear Prediction Algorithms in ADPCM", Michael L. Honig, IEEE Transactions on Communications, vol. Com-30, No. 7, Jul. 1982.
"Principles of Pulse Code Modulation", K. W. Cattermole, ILIFFE Books, London, 1973.

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