Title :
Real-time implementation of a 12.8 kbit/s LD-CELP speech codec
Author_Institution :
Coll. of Inf. Eng., Taiyuan Univ. of Technol., China
Abstract :
The paper describes a 12.8 kbit/s LD-CELP speech coding algorithm on the basis of the G.728 speech codec, and presents the concept of codeword use frequency (CUF). The experimental results show that the method can decrease effectively the complexity of vector quantization codebooks and give better synthesis speech quality than other similar methods. The algorithm is implemented in duplex real-time on a high-speed DSP system with two TMS320C31 chips
Keywords :
digital signal processing chips; linear predictive coding; speech codecs; speech coding; vector quantisation; 12.8 kbit/s; G.728 speech codec; LD-CELP speech codec; TMS320C31 DSP chips; codeword use frequency; complexity reduction; high-speed DSP system; low delay code excited linear prediction; real-time implementation; speech coding algorithm; vector quantization codebooks; Delay; Digital signal processing chips; Filters; Frequency; Linear predictive coding; Speech analysis; Speech codecs; Speech coding; Speech synthesis; Vector quantization;
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.2000.891603
