Method of adaptive quantization in differential pulse code modul

Details Method of adaptive quantization in differential pulse code modul Method of adaptive quantization in differential pulse code modul

1988-12-01

1990-11-27

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

360 32, 375 30, H04B 1406

Patent

active

049742353

ABSTRACT:
A transmission method for digital data which is adapted to transmit a predictive residual at every sample and a predictive coefficient and a normalization gain at every data block to thereby provide highly efficient coding and data transmission.
An adaptive quantization method suitable for use in the above-mentioned digital data transmission, forms samples into a block and a predetermined multiplication is effected on the sample of each of the blocks to thereby improve the accuracy of the predictive coefficients. A stable operation may be ensured in the adaptive quantizing method by cancelling the subsequent operation when the auto-correlation of input data is not recognized.

REFERENCES:
patent: 4317208 (1982-02-01), Araseki et al.
patent: 4468640 (1984-08-01), Gritton
patent: 4509150 (1985-04-01), Davis
patent: 4587620 (1986-05-01), Niimi et al.

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