Title :
Study and development of MELP vocoder
Author :
Wenyuan, Li ; Xin, Ma ; Yuzhong, Zhang ; Yifang, Zeng
Author_Institution :
Inst. of Electron. & Inf. Eng., Tianjin Univ., China
Abstract :
In mixed-excitation linear prediction (MELP) coding, a new speech synthesis model that approaches actual human pronunciation mechanism is adopted to improve the performance of low bit-rate speech coding. A penetrating analysis of the MELP algorithm is presented in this paper. Improvements in multi-stage vector searching method and in pitch estimation are suggested. A 2.4 kbit/s MELP vocoder has been simulated on PC and realized real time using one single TMS320C5402 DSP.
Keywords :
data compression; digital signal processing chips; frequency estimation; linear predictive coding; real-time systems; search problems; speech coding; speech synthesis; vocoders; MELP coding; TMS320C5402 DSP; human pronunciation mechanism; low bit-rate speech coding; mixed-excitation linear prediction; multi-stage vector search; performance; pitch estimation; real time vocoder; speech compression; speech synthesis model; Humans; Interpolation; Jitter; Prototypes; Signal synthesis; Speech analysis; Speech coding; Speech synthesis; Vectors; Vocoders;
Conference_Titel :
Signal Processing, 2002 6th International Conference on
Print_ISBN :
0-7803-7488-6
DOI :
10.1109/ICOSP.2002.1180125
