8th European Conference on Speech Communication and Technology

Geneva, Switzerland
September 1-4, 2003


Optimization of Window and LSF Interpolation Factor for the ITU-T G.729 Speech Coding Standard

Wai C. Chu, Toshio Miki

DoCoMo USA Labs, USA

A gradient-descent based optimization procedure is applied to the window sequence used for linear prediction (LP) analysis of the ITU-T G.729 CS-ACELP coder. By replacing the original window of the standard by the optimized versions, similar subjective quality is obtainable at reduced computational cost and / or lowered coding delay. In addition, an optimization strategy is described to find the line spectral frequency (LSF) interpolation factor.

Full Paper

Bibliographic reference.  Chu, Wai C. / Miki, Toshio (2003): "Optimization of window and LSF interpolation factor for the ITU-t g.729 speech coding standard", In EUROSPEECH-2003, 1061-1064.