A new 1.2 kb/s speech coding algorithm and its real-time implementation on TMS320LC548
Liang Chen, Xiongwei Zhang · 2002
In order to meet the needs of wireless digital communication, a new 1.2 kb/s speech coding algorithm based on mixed excitation linear prediction (MELP) is proposed in this paper. Compared with the US Federal Standard 2.4 kb/s MELP algorithm, this new algorithm improves several aspects such as model structure, LSF (line spectrum frequency) quantization and decoding. This algorithm has been implemented on Texas Instruments TMS320LC548 DSP processor. Informal listening test results show that the intelligibility, naturalness and anti-noise performance of the 1.2 kb/s speech coding algorithm are comparable to those of the 2.4 kb/s MELP algorithm.