Abstract:
A new criterion is derived for the design of the noise weighting filter in linear predictive coding (LPC) that accounts for the issue of noise propagation. It will be sho...Show MoreMetadata
Abstract:
A new criterion is derived for the design of the noise weighting filter in linear predictive coding (LPC) that accounts for the issue of noise propagation. It will be shown that the new filter design constitutes an approximation of the reverse waterfilling procedure known from rate-distortion theory and audio transform coding. It improves the overall coding SNR of closed-loop LPC with noise shaping. A practical application within the 3GPP AMRWB codec is presented. Objective test results indicate notable quality improvements.
Published in: Speech Communication; 11. ITG Symposium
Date of Conference: 24-26 September 2014
Date Added to IEEE Xplore: 17 October 2014
Print ISBN:978-3-8007-3640-9
Conference Location: Erlangen, Germany
