Title :
A real-time 8000 bps ACELP coder with low complexity and high quality
Author :
Zhiyong, Liu ; Kun, Tang ; Chongxi, Feng
Author_Institution :
State Key Lab., Tsinghua Univ., Beijing, China
Abstract :
A kind of real time speech coder with low complexity and high quality at a bit rate of 8.0 kbps is presented. The encoding algorithm is based on algebraic code excited linear prediction (ACELP). Efficient pitch and codebook search strategies along with efficient quantization procedures, have been developed to achieve high quality encoded speech with a complexity implementable on current low price fixed point DSP chips such as the TMS320C25. Through subjective tests we have verified that the proposed algorithm is comparable to the CVSD coder at 32 kbps
Keywords :
algebraic codes; digital signal processing chips; linear predictive coding; search problems; speech coding; speech intelligibility; 8 kbit/s; TMS320C25; algebraic code excited linear prediction; codebook search; encoded speech; encoding algorithm; fixed point DSP chips; high quality coder; low complexity coder; pitch search; quantization; real time ACELP coder; subjective tests; Algorithm design and analysis; Autocorrelation; Bit rate; Digital signal processing chips; Filters; Quantization; Speech analysis; Speech coding; Speech synthesis; Technological innovation;
Conference_Titel :
Communication Technology Proceedings, 1996. ICCT'96., 1996 International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-2916-3
DOI :
10.1109/ICCT.1996.545214
