Title :
Coded Domain Level Control for The AMR Speech Codec
Author_Institution :
Nokia Res. Center
Abstract :
This paper presents a coded domain level control technique for the adaptive multi-rate (AMR) speech codec. Level control in the coded domain is done by directly modifying quantized speech parameters. The advantage of the method is an accurate speech level control with minimized system complexity and end-to-end delay when tandem coding can be avoided completely. Requantization optimization functions are derived for scalar and vector quantization of relevant parameters. The experimental results show that the presented technique makes possible to apply a desired gain in the coded domain maintaining high speech quality
Keywords :
speech codecs; speech coding; speech synthesis; vector quantisation; AMR speech codec; adaptive multirate speech codec; coded domain level control; end-to-end delay; requantization optimization functions; scalar quantization; speech synthesis; vector quantization; Adaptive control; Bit rate; Decoding; Delay; Level control; Programmable control; Signal synthesis; Speech codecs; Speech enhancement; Speech synthesis;
Conference_Titel :
Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on
Conference_Location :
Toulouse
Print_ISBN :
1-4244-0469-X
DOI :
10.1109/ICASSP.2006.1660113
