Title :
Smoothed DPCM codes
Author :
Chang, Wen-Whei ; Gibson, Jerry D.
Author_Institution :
Dept. of Commun. Eng., Nat. Chiao-Tung Univ., Taiwan
fDate :
9/1/1991 12:00:00 AM
Abstract :
Interpolative differential pulse code modulation (IDPCM) is known to outperform DPCM at rate 1 b/sample for several synthetic source models. The authors use minimum-mean-squared error (MMSE) fixed-lag smoothing with DPCM to develop a code generator using delayed decoding. This smoothed DPCM (SDPCM) code generator is compared to DPCM and IDPCM code generators at rates 1 and 2 b/sample for tree coding several synthetic sources and to a DPCM code generator at 2 b/sample for speech sources
Keywords :
encoding; pulse-code modulation; speech analysis and processing; MMSE fixed-lag smoothing; SDPCM; code generator; delayed decoding; interpolative differential pulse code modulation; minimum-mean-squared error; smoothed DPCM codes; speech sources; synthetic sources; tree coding; Acoustic testing; Data compression; Decoding; Delay; Distortion measurement; Encoding; Interpolation; Pulse modulation; Spectrogram; Speech coding;
Journal_Title :
Communications, IEEE Transactions on
