ADPCM synthesizer without look-up table

Details ADPCM synthesizer without look-up table ADPCM synthesizer without look-up table

1994-01-11

1996-06-04

Tse, Young T.

Pulse or digital communications

Pulse code modulation

Differential

341 76, H04B 1406

Patent

active

055240240

ABSTRACT:
The present invention provides a circuit for use in an ADPCM synthesizer for generating a function of a quantization step without the use of a look-up table. Illustratively, the function is represented in a piecewise linear fashion. This permits an ADPCM synthesizer to be implemented without the use of a memory storing a look-up table for the function so the area of the synthesizer chip can be reduced.

REFERENCES:
patent: 4860313 (1989-08-01), Shpiro

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