Pulse or digital communications – Bandwidth reduction or expansion – Pulse code modulation
Patent
1995-07-26
1998-07-14
Chin, Stephen
Pulse or digital communications
Bandwidth reduction or expansion
Pulse code modulation
375242, 375253, 704229, 704501, 704504, 341 51, H04B 166
Patent
active
057815860
ABSTRACT:
A method and apparatus for encoding an input signal in which the input signal is transformed into frequency components which are encoded by quantization from one encoding unit to another. The information specifying zero encoding units among the encoding units in which encoding is done on the assumption that all frequency components contained in them are deemed to be zero are encoded, is encoded, while the quantization step information of the zero encoding units is outputted without encoding. With the encoding method and apparatus, the number of the encoding bits may be decreased while deterioration in the input signal is prohibited for improving the encoding efficiency.
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Chin Stephen
Le Amanda T.
Sony Corporation
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