Tri-state delta codec method and system

Details Tri-state delta codec method and system Tri-state delta codec method and system

2006-08-29

2006-08-29

Young, Brian (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from multi-level codes

Reexamination Certificate

active

07098816

ABSTRACT:
A delta modulation method and system is provided for processing signals in a digital communications system. The method quantizes an input signal using a tri-state quantizer into a quantized value selected from a set of three different quantized values including a low value, a middle value, and a high value. The selection of the quantized value is based on a comparison between the input signal and a predicted signal of a corresponding sampling period. The method generates from the quantized value an output signal representative of the input signal, determines a predicted signal of the next sampling period, and then feeds the predicted signal of next sampling period back to the tri-state quantizer.

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James L. Flanacan, et al., “Speech Coding”, IEEE Transactions on Communications, vol. COM-27, No. 4, Apr. 1979.

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