Interpolative PCM decoder utilized for .mu.-law and A-law

Details Interpolative PCM decoder utilized for .mu.-law and A-law Interpolative PCM decoder utilized for .mu.-law and A-law

1978-12-15

1980-10-28

Sloyan, Thomas J.

Communications: electrical

Audible indication

Percussion-type sound producer

340347M, 370109, H03K 1302

Patent

active

042310229

ABSTRACT:
An interpolative PCM decoder converts PCM signals having polarity bits, segment selection bits and uniform quantization bits into an analog signal. The PCM decoder may be used both for .mu.-law and A-law conversion by use of simple circuits and includes an AND gate circuit which produces a logical product between a selection signal for selecting a minimum unit of an analog value of a lower end of a segment and a control signal for change-over between the .mu.-law and the A-law, and a circuit generating the same analog values as the minimum unit of the analog value in accordance with an output of the AND gate circuit.

REFERENCES:
patent: 3893102 (1975-07-01), Candy
patent: 3987436 (1976-10-01), Candy et al.
Ritchie et al., "Interpolative Digital-to-Analog Converters," IEEE Transactions on Communications, Nov. 1974, pp. 1797-1806 (COM-22; No. 11).

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