Real-time implementation of a 12.8 kbit/s LD-CELP speech codec
Xueying Zhang · 2002
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.