Title :
On Soft-Decision Demodulation for PCM- and DPCM- Encoded Speech
Author :
Jayant, N.S. ; Steele, R. ; Chan, Ngai Wai ; Schmidt, C.E.
Author_Institution :
Bell Labs., Murray Hill, NJ
fDate :
2/1/1980 12:00:00 AM
Abstract :
In a simulation of soft decision demodulation-interpolation for digital speech transmission, it has been noted that signal-to-noise ratio gains due to the technique are greater with nonadaptive and periodically adaptive quantizers than with instantaneously adaptive quantizers; further, the gains are greater with PCM than with differential PCM. Our results for nonadaptive PCM reinforce those in a recent analytical paper by Sundberg [1].
Keywords :
DPCM coding/decoding; Speech coding; Additive noise; Additive white noise; Amplitude modulation; Demodulation; Gaussian noise; Noise level; Phase change materials; Signal to noise ratio; Speech analysis; Speech coding;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOM.1980.1094645
