Title :
Quantization noise estimation for log-PCM
Author :
Konate, Mohamed ; Kabal, Peter
Author_Institution :
Dept. of Electr. & Comput. Eng., McGill Univ., Montreal, QC, Canada
Abstract :
ITU-T G.711.1 is a multirate wideband extension for the well known ITU-T G.711 pulse code modulation of voice frequencies. The extended system is fully interoperable with the legacy narrowband one. In the case where the legacy G.711 is used to code a speech signal and G.711.1 is used to decode it, quantization noise may be audible. For this situation, the standard proposes an optional postfilter. The application of postfiltering requires an estimation of the quatization noise. In this paper we review the process of estimating this coding noise and we propose a better noise estimator.
Keywords :
pulse code modulation; quantisation (signal); speech coding; ITU-T G.711 pulse code modulation; ITU-T G.711.1; LOG-PCM; coding noise; multirate wideband extension; optional postfilter; quantization noise estimation; speech signal; voice frequencies; Encoding; Estimation; Frequency domain analysis; Quantization; Signal to noise ratio; Speech; Postfilter; quantization noise;
Conference_Titel :
Electrical and Computer Engineering (CCECE), 2011 24th Canadian Conference on
Conference_Location :
Niagara Falls, ON
Print_ISBN :
978-1-4244-9788-1
Electronic_ISBN :
0840-7789
DOI :
10.1109/CCECE.2011.6030680
