Title :
Adaptive silence deletion for speech storage and voice mail applications
Author :
Gan, Cheong K. ; Donaldson, Robert W.
Author_Institution :
IBM Canada, Toronto, Ont., Canada
fDate :
6/1/1988 12:00:00 AM
Abstract :
An algorithm that uses two adaptive-amplitude thresholds and zero-crossing rate was used to delete nonspeech material from speech waveforms which have been digitally encoded and then decoded using PCM, adaptive-differential PCM, and adaptive-delta-modulation. Typically, compression rates of 35% resulted. Subject evaluations are used to assess reconstructed speech quality, which improves significantly when absolute silence on playback is replaced with prerecorded background noise
Keywords :
decoding; encoding; speech; speech analysis and processing; voice mail; PCM; absolute silence; adaptive silence deletion; adaptive-amplitude thresholds; adaptive-delta-modulation; adaptive-differential PCM; compression rates; nonspeech material; prerecorded background noise; reconstructed speech quality; speech storage; voice mail; zero-crossing rate; Algorithm design and analysis; Approximation algorithms; Interpolation; Material storage; Maximum likelihood estimation; Phase change materials; Signal processing algorithms; Speech processing; Time series analysis; Voice mail;
Journal_Title :
Acoustics, Speech and Signal Processing, IEEE Transactions on
