Title :
A 1.44 kbps vocoder based on LSP
Author :
Jiang, Tianyi ; Li, Yongming ; Chen, Hongyi
Author_Institution :
Inst. of Microelectron., Tsinghua Univ., Beijing, China
Abstract :
This paper presents a simple and efficient speech coding algorithm based on traditional LPC vocoder. By employing a dynamic smoothing method to optimize the pitch detector and split vector quantization to quantize the LSP parameters, a high level of speech quality and intelligibility is achieved at 1.44 kbps. Because of the low computational complexity and high coding efficiency, it is one of the best algorithms suitable for ASIC design
Keywords :
application specific integrated circuits; computational complexity; linear predictive coding; smoothing methods; spectral analysis; speech coding; vector quantisation; vocoders; 1.44 kbit/s; ASIC design; LPC vocoder; LSP; LSP parameters; dynamic smoothing method; efficient speech coding algorithm; high coding efficiency; low computational complexity; pitch detector; speech intelligibility; speech quality; split VQ; split vector quantization; vocoder; Algorithm design and analysis; Application specific integrated circuits; Computational complexity; Detectors; Linear predictive coding; Optimization methods; Smoothing methods; Speech coding; Vector quantization; Vocoders;
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.2000.891606
