DocumentCode :
2280161
Title :
Enhanced multiband excitation coding of speech at 2.4 Kb/s with discrete all-pole spectral modeling
Author :
Das, Amitava ; Rao, Ajit V. ; Gersho, Allen
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA
Volume :
2
fYear :
1994
fDate :
28 Nov- 2 Dec 1994
Firstpage :
863
Abstract :
This paper presents a high quality, low bit rate speech coder which applies an effective spectral modeling technique called discrete all-pole (DAP) modeling to efficiently represent speech spectra. The technique provides a fixed-dimension representation of the (pitch-dependent) variable dimension spectral shape vectors which arise in harmonic coders. Consequently, the spectral shapes are quantized more efficiently than with the usual linear prediction modeling, leading to better speech quality. We present a 2.4 kb/s speech coder, based on the multiband excitation (MBE) model and DAP modeling of the speech spectra, which delivers speech quality comparable to two standard higher rate coders: the 4.8 kb/s U.S. Federal Standard 1016 CELP coder and the 4.15 kb/s IMBE coder, adopted as the INMARSAT-M standard for satellite voice communications
Keywords :
harmonics; quantisation (signal); spectral analysis; speech coding; 2.4 Kbit/s; DAP modeling; discrete all-pole spectral modeling; effective spectral modeling technique; enhanced multiband excitation coding; fixed-dimension representation; harmonic coders; low bit rate speech coder; satellite voice communications; spectral shape vectors; speech coding; speech quality; speech spectra; Artificial satellites; Bit rate; Code standards; Communication standards; Digital audio players; Predictive models; Spectral shape; Speech coding; Speech enhancement; Vectors;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Global Telecommunications Conference, 1994. GLOBECOM '94. Communications: The Global Bridge., IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-1820-X
Type :
conf
DOI :
10.1109/GLOCOM.1994.512717
Filename :
512717
Link To Document :
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