An Improved 1.2 kb/s Speech Coding Algorithm and its Real-time Implementation
Liang Chen, Pla Uni, Pla Military · Journal of PLA University of Science and Technology · 2002
In order to meet the needs of wireless communication, a new 1.2 kb/s speech coding algorithm based on mixed excitation linear prediction is proposed in this paper. Compared with the traditional 2.4 kb/s LPC algorithm, this new algorithm improves several aspects such as model structue, LSP quantization and decoding. This algorithm has been implemented on TMS320VC5416 DSP processor. Objective speech quality testing and informal listening testing results show that the intelligibility, naturalness and anti-noise performance of the 1.2 kb/s speech coding algorithm excel 2.4 kb/s LPC algorithm.