DocumentCode
759822
Title
Envelope Dynamic Ratio Quantizer
Author
Xydeas, Costas S. ; Faruqui, M.N. ; Steele, Raymond
Author_Institution
Loughborough University of Technology, Loughborough England
Volume
28
Issue
5
fYear
1980
fDate
5/1/1980 12:00:00 AM
Firstpage
720
Lastpage
728
Abstract
The envelope dynamic ratio quantizer (envelope DRQ) is an adaptive quantizer for speech signals. By utilizing the envelope of the speech, nonlinear elements, a fixed quantizer and a simple predictor, a closed-loop adaptive quantizer emerges having a high constant SNR over a wide dynamic range. The theory of the quantizer is presented, together with computer simulation results which show an improvement.compared to the one word memory APCM system. Finally, the simplicity of implementing the envelope DRQ is described.
Keywords
Adaptive coding; Speech coding; Computer simulation; Control systems; Decoding; Dynamic range; Feedback loop; Modulation coding; Pulse modulation; Quantization; Signal to noise ratio; Speech;
fLanguage
English
Journal_Title
Communications, IEEE Transactions on
Publisher
ieee
ISSN
0090-6778
Type
jour
DOI
10.1109/TCOM.1980.1094713
Filename
1094713
Link To Document