Pulse or digital communications – Pulse code modulation – Correcting or reducing quantizing errors
Patent
1996-11-12
1997-12-16
Chin, Stephen
Pulse or digital communications
Pulse code modulation
Correcting or reducing quantizing errors
375350, 381 47, 395 236, H04B 1404, G10L 900
Patent
active
056993820
ABSTRACT:
The invention is used to shape noise in time domain and frequency domain coding schemes. The method advantageously uses a noise weighting filter based on a filterbank with variable gains. A method is presented for decoding an encoded signal based on received side information and on a masking matrix derived from the masking properties of speech. In particular, the encoded signal is separated into subband signal components, each of which is multiplied by a corresponding gain value based on the masking matrix. These multiplied subband signal components are then combined to produce a decoded signal.
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Shoham Yair
Wierzynski Casimir
Brown Kenneth M.
Chin Stephen
Gluck Jeffrey W.
Lucent Technologies - Inc.
Olson Katharyn E.
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