Title :
Low-Complexity PARCOR Coefficient Quantizer and Prediction Order Estimator for G.711.0 (Lossless Speech Coding)
Author :
Kamamoto, Yutaka ; Moriya, Takehiro ; Harada, Noboru
Author_Institution :
NTT Commun. Sci. Labs., Nippon Telegraph & Telephone Corp., Atsugi, Japan
Abstract :
This paper presents two low-complexity tools used for the new ITU-T recommendation G.711.0, which is the standard for lossless compression of G.711 (A-law/Mu-law logarithmic PCM) speech data. One is an algorithm for quantizing the PARCOR/reflection coefficients and the other is an estimation method for the optimal prediction order. Both tools are based on a criterion that minimizes the entropy of the prediction residual signals and can be implemented in a fixed-point low-complexity algorithm. G.711.0 with the developed practical tools will be widely used everywhere because it can losslessly reduce the data rate of G.711, the prevailing speech-coding technology.
Keywords :
data compression; quantisation (signal); speech coding; G.711 lossless compression; ITU-T recommendation; entropy; fixed-point low-complexity algorithm; lossless compression; low-complexity PARCOR coefficient quantizer; optimal prediction order; prediction order estimator; reflection coefficients; residual signals; speech-coding technology; Codecs; Decoding; Entropy; Linear predictive coding; Phase change materials; Pulse modulation; Quantization; Reflection; Signal processing; Speech coding; G.711; Linear predictive coding; Lossless compression; Speech coding; Standardization;
Conference_Titel :
Data Compression Conference (DCC), 2010
Conference_Location :
Snowbird, UT
Print_ISBN :
978-1-4244-6425-8
Electronic_ISBN :
1068-0314
DOI :
10.1109/DCC.2010.49
