Subband vector excitation coding with adaptive bit-allocation

Author

Yong, Mei ; Gersho, Allen

Author_Institution

Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA

fYear

1989

Firstpage

743

Abstract

A study of the combination of VSC (vector excitation coding) with subband coding is reported. In subband VXC (SBVXC), the burden of redundancy removal is split between the frequency domain and time domain to take advantage of both predictive coding and subband coding techniques. The conventional adaptive bit-allocation method used in subband coding has been generalized for use in SBVXC. Simulated comparisons of several coding schemes, including one comparing SBVXC with the full-band VXC, are presented. Results show that a two-band version of SBVXC can produce fairly clear, intelligible, and natural-sounding synthetic speech at 4.8 kb/s and very high quality speech at 8 kb/s with a reasonable complexity

Keywords

encoding; speech analysis and processing; speech synthesis; 4.8 kbit/s; 8 kbit/s; adaptive bit-allocation; adaptive bit-allocation method; frequency domain; redundancy removal; speech coding; speech synthesis; subband coding; time domain; vector excitation coding; Distortion measurement; Dynamic range; Encoding; Frequency; Nonlinear filters; Signal synthesis; Speech coding; Speech synthesis; Stochastic processes; Vector quantization;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1989. ICASSP-89., 1989 International Conference on

Conference_Location

Glasgow

ISSN

1520-6149

Type

conf

DOI

10.1109/ICASSP.1989.266534

Filename

266534