Title :
Multimode quantization of LP parameters in MBE-LPC-FE coder
Author :
Han, Dahan ; Cui, Huijuan ; Tang, Kun
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
fDate :
29 June-1 July 2002
Abstract :
A new spectral parameter coding method is used in MBE-LPC-FE algorithm. In this method, the sub-band V/UV decision is first evaluated to decide which codebook should be used in the following quantization of LP model parameters, in which the gain and LSP coefficients are included. To get the exact V/UV mode, a new sub-band V/UV decision method is proposed, in which the frequency bound and the number of sub-band are fixed while the number of harmonics in a single sub-band is determined by the fundamental frequency. The experimental result shows this multimode quantization scheme performs better than the original single-mode quantization method.
Keywords :
data compression; harmonics; linear predictive coding; quantisation (signal); spectral analysis; speech coding; LP model parameters; LSP coefficients; MBE-LPC-FE coder; codebook; coding error; frequency bound; fundamental frequency; gain; harmonics; linear predictive coding; multi-band excitation; multimode quantization; quantization; single-mode quantization method; spectral parameter coding method; speech coding; sub-band V/UV decision; Digital communication; Frequency conversion; Frequency estimation; Laboratories; Microwave theory and techniques; Speech analysis; Speech coding; Speech synthesis; Vector quantization; Vocoders;
Conference_Titel :
Communications, Circuits and Systems and West Sino Expositions, IEEE 2002 International Conference on
Print_ISBN :
0-7803-7547-5
DOI :
10.1109/ICCCAS.2002.1180563
