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US Patent 7098816 Tri-state delta codec method and system

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Patent
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Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
1
Patent Number
70988161
Patent Inventor Names
Yu Chau Ng1
Cheuk Wai Mok1
Date of Patent
August 29, 2006
1
Patent Application Number
109086871
Date Filed
May 23, 2005
1
Patent Primary Examiner
‌
Brian Young
1
Patent 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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