Title :
Implementation of a 12.8 kbit/s LD-CELP speech codec
Author_Institution :
Taiyuan Univ. of Technol., China
Abstract :
The paper presents a 12.8 kbit/s LD-CELP speech coding algorithm that is based on the G.728 speech coding standard. The method can decrease effectively the size of the vector quantization codebook by doing a statistical experiment on the codeword use frequency for the codebook. The results show that the algorithm can hold better synthesised speech quality than other same type ways. Finally, the algorithm is implemented in duplex real-time on a high speed DSP system with two TMS320C31s
Keywords :
digital signal processing chips; linear predictive coding; speech codecs; speech coding; vector quantisation; 12.8 kbit/s LD-CELP speech codec; G.728 speech coding standard; TMS320C31; codeword use frequency; duplex real-time; high speed DSP system; statistical experiment; synthesised speech quality; vector quantization codebook; Digital signal processing; Frequency; Paper technology; Real time systems; Speech codecs; Speech coding; Speech synthesis; Vector quantization;
Conference_Titel :
Intelligent Control and Automation, 2000. Proceedings of the 3rd World Congress on
Conference_Location :
Hefei
Print_ISBN :
0-7803-5995-X
DOI :
10.1109/WCICA.2000.862495
