Advances in low bitrate time-frequency coding
Tommy Vaillancourt, Vladimir Malenovsky, Redwan Salami, Zexin Liu, Lei Miao, Jon Gibbs, Milan Jelinek
Abstract
In this paper a novel technique is presented to efficiently mix traditional ACELP time domain coding with a frequency domain coding model to improve the quality of generic audio signals coded at low bitrates without additional delay. The paper discusses how to integrate parts of a traditional Algebraic Code Excited Linear Prediction (ACELP) speech codec to create a time-domain contribution which coexists with a frequency based coding model. A mechanism to determine the value of the time-domain contribution is proposed and a method is described how the frequency-domain contribution might be added without increasing the overall delay of the codec. The proposed method forms part of the recently standardised 3GPP EVS codec.
BibTeX
@inproceedings{icassp2015_advancesinlowbit,
title = {Advances in low bitrate time-frequency coding},
author = {Tommy Vaillancourt and Vladimir Malenovsky and Redwan Salami and Zexin Liu and Lei Miao and Jon Gibbs and Milan Jelinek},
booktitle = {ICASSP 2015},
year = {2015}
}