Super-wideband bandwidth extension for speech in the 3GPP EVS codec
Venkatraman Atti, Venkatesh Krishnan, Duminda A. Dewasurendra, Venkata Chebiyyam, Shaminda Subasingha, Daniel J. Sinder, Vivek Rajendran, Imre Varga
Abstract
This paper describes the time-domain bandwidth extension (TBE) framework employed to code wideband and super-wideband speech in the newly standardized 3GPP EVS codec. The TBE algorithm uses a nonlinear harmonic modeling technique that incorporates principles of time-domain envelope-modulated noise mixing. At 13.2 kbps, the super-wideband coding of speech uses as low as 1.55 kbps for encoding the spectral content from 6.4-14.4 kHz. Subjective evaluation results from ITU-T P.800 Mean Opinion Score (MOS) tests are provided, showing significantly improved quality compared to the other standardized SWB codecs under both clean speech and speech with background noise.
BibTeX
@inproceedings{icassp2015_superwidebandban,
title = {Super-wideband bandwidth extension for speech in the 3GPP EVS codec},
author = {Venkatraman Atti and Venkatesh Krishnan and Duminda A. Dewasurendra and Venkata Chebiyyam and Shaminda Subasingha and Daniel J. Sinder and Vivek Rajendran and Imre Varga and Jon Gibbs and Lei Miao and Volodya Grancharov and Harald Pobloth},
booktitle = {ICASSP 2015},
year = {2015}
}