Title :
Perceptually Constrained Variable Bitrate Wideband Speech Coder
Author :
Livshitz, Michael ; Petrovsky, Alexander
Author_Institution :
Comput. Eng. Dept., Belarusian State Univ. of Informatics & Radioelectron., Minsk
Abstract :
A high quality wideband speech coder based on code-excited linear prediction (CELP) algorithm with perceptually constrained variable bitrate (VBR) is proposed in this paper. A VBR is achieved with the help of reconfigurable structure of multiband multistage codebook of excitation vectors controlled by psychoacoustic model based on warped discrete-Fourier transform (WDFT). Comparison with MPEG1 Layer III codecs at 16, 24 and 32 kbps is implemented
Keywords :
speech coding; variable rate codes; vocoders; code-excited linear prediction; excitation vectors; high quality wideband speech coder; multiband multistage codebook; perceptually constrained variable bitrate; psychoacoustic model; variable bitrate wideband speech coder; warped discrete-Fourier transform; Bandwidth; Bit rate; Codecs; Discrete transforms; Frequency; Psychoacoustic models; Psychology; Quantization; Speech; Wideband; CELP; Multiband Codebook with Multistage Structure; Psychoacoustics; Reconfigurable Codebook Structure; Variable Bitrate; WDFT;
Conference_Titel :
Computer as a Tool, 2005. EUROCON 2005.The International Conference on
Conference_Location :
Belgrade
Print_ISBN :
1-4244-0049-X
DOI :
10.1109/EURCON.2005.1630195
