Title :
Joint optimization algorithm of multi-parameter codebook size based on superframe mode
Author :
Xu, Mengdi ; Ye Li ; Cui, Hao ; Tang, Ke
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing
Abstract :
An algorithm based on superframe mode has been proposed to jointly optimize the multi-parameter codebook sizes in research of 0.3 Kb/s speech coding algorithm based on MELP. Codebook sizes for pitch, line spectrum frequency (LSF) and short term energy in various superframe modes are optimized together depending on the bits to quantize them. Simulation results showed that the proposed algorithm greatly reduced the quantization error of the parameters while enhancing the reconstructed speech quality compared with the classic algorithm without jointly optimizing the codebook sizes.
Keywords :
optimisation; quantisation (signal); speech coding; joint optimization algorithm; line spectrum frequency; multiparameter codebook size; quantization error; short term energy; speech coding algorithm; speech quality; superframe mode; Bit rate; Digital communication; Frequency; Image reconstruction; Power engineering and energy; Quantization; Signal processing algorithms; Speech coding; Speech enhancement; Speech processing;
Conference_Titel :
Signal Processing, 2008. ICSP 2008. 9th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2178-7
Electronic_ISBN :
978-1-4244-2179-4
DOI :
10.1109/ICOSP.2008.4697183
