Title :
A robust harmonic vector excitation speech coder at 2 kbps
Author :
Qinghai, Ding ; Zhonghu, Huang ; Xianzhi, Chen
Author_Institution :
Inst. of Commun. Eng. of PLAUST, Nanjing, China
Abstract :
This paper describes a more robust algorithm for encoding speech signals at very poor signal to noise ratios (SNR) and low bit rate based on information share. It consists of an improved speech enhancement scheme integrated into a 2 kbps vocoder framework. In this scheme, the speech enhancement is based on an improved spectral minim tracking (SMT) and the encoder is based on a mixed harmonic and vector modeling of the excitation (HVXC). Results showing the effects of the presented scheme are given for very noisy environments
Keywords :
harmonics; speech coding; speech enhancement; vocoders; 2 kbit/s; HVXC algorithm; harmonic vector excitation speech coder; low bit rate coding; noisy environments; robust algorithm; signal to noise ratio; spectral minim tracking; speech coding; speech enhancement scheme; vocoder; Bit rate; Costs; Digital signal processing; Encoding; Linear predictive coding; Noise robustness; Signal to noise ratio; Speech coding; Speech enhancement; Working environment noise;
Conference_Titel :
Signal Processing Proceedings, 2000. WCCC-ICSP 2000. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-5747-7
DOI :
10.1109/ICOSP.2000.891595
