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http://dx.doi.org/10.7776/ASK.2007.26.3.109

Improvement of the TCX Module in AMR-WB+ Codec Using Pyramid VQ  

Park, Sang-Kuk (한양대학교 전자컴퓨터공학부)
Park, Jung-Eun (한양대학교 전자컴퓨터공학부)
Baik, Seung-Kweon (전자통신연구원)
Seo, Jung-Il (전자통신연구원)
Kang, Sang-Won (한양대학교 전자컴퓨터공학부)
Publication Information
The Journal of the Acoustical Society of Korea / v.26, no.3, 2007 , pp. 109-114 More about this Journal
Abstract
In this paper, we Propose a pyramid VQ to quantize the transform coefficients of TCX module for the audio improvement of AMR-WB+ codec. The Proposed pyramid VQ is compared to the $RE_8$ Lattice VQ used in the AMR-WB+ standard codec. demonstrating improvement 4% and 5.7%. respectively, in Mean Squared Error (MSE) and 3.3% and 4.7%. respectively, in Perceptual Evaluation of Audio Quality (PEAQ) by 8-dimensional and 16-dimensional Pyramid VQ.
Keywords
Audio coding; Pyramid VQ; AMR-WB+; Quantization;
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