Predictive coding device

Details Predictive coding device Predictive coding device

1989-04-03

1990-12-18

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

341 76, H04B 1406

Patent

active

049791877

ABSTRACT:
A predictive coding device includes: a limiter to limit an input value having a first dynamic range to a value within a second dynamic range narrower than the first dynamic range; a subtracter to calculate a differential value between an output value of the limiter and a predictive value; a quantization circuit to assign the same code to differential values which differ by a value which is equal to or larger than the second dynamic range and smaller than the first dynamic range; and a predictor to calculate a new predictive value by using an output of the quantization circuit. The quality of the code due to the limitation of the dynamic range is improved.

REFERENCES:
patent: 3582784 (1971-06-01), Gaunt, Jr.
patent: 3831092 (1974-08-01), Greefkes
patent: 4519073 (1985-05-01), Bertocci et al.
patent: 4554671 (1985-11-01), Collins

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