Pulse or digital communications – Pulse code modulation – Differential
Patent
1995-01-17
1997-12-09
Chin, Stephen
Pulse or digital communications
Pulse code modulation
Differential
348409, 341143, 358430, H04B 346
Patent
active
056967918
ABSTRACT:
A method and apparatus of decoding a sequence of digitally encoded data. A sequence of digitally encoded data is received. If the digitally encoded data has a value indicative of a single corresponding decoded value, the corresponding decoded value is generated. If the digitally encoded data has a value indicative of a plurality of predetermined values, a unique decoded value is selected from the plurality of predetermined decoded values. The particular one of the plurality of predetermined values selected is determined by the number of consecutively received digitally encoded data values having a value indicative of a plurality of predetermined values, and further according to the sign bit of the most recently received digitally encoded datum having a value indicative of a single corresponding decoded value.
REFERENCES:
patent: 4569058 (1986-02-01), Grallert
Microsoft Corporation, "New Multimedia Data Types and Data Techniques", Apr. 15, 1994, pp. 18-24.
P.W. Noll, "Nonadaptive and Adaptive Differential Pulse Code Modulation of Speech Signals", Netherlands P.T. publication, Sep. 13, 1972, pp. 623-629.
Chin Stephen
Le Amanda T.
VTECH Industries, Inc.
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