MIXED FOURIER WALSH TRANSFORM SCHEME FOR SPEECH CODING AT 4.0 KBIT/S

被引：10
作者：
SPANIAS, AS
LOIZOU, PC
机构：
[1] Arizona State Univ, Tempe, AZ
来源：
IEE PROCEEDINGS-I COMMUNICATIONS SPEECH AND VISION | 1992年 / 139卷 / 05期
关键词：
FOURIER TRANSFORMS; SPEECH MODELS; VOCODERS; WALSH TRANSFORMS;
D O I：
10.1049/ip-i-2.1992.0063
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A mixed Fourier/Walsh transform scheme for speech coding is proposed. A set of harmonically structured frequency components is used to represent narrow-band components of speech. The broadband residual is characterised by a small number of sequency components. The frequencies and sequencies of the transform components are determined by sampling the short-time Fourier and Walsh transforms, respectively. The magnitudes and phases of the Fourier components and the amplitudes of the Walsh components are determined using an iterative algorithm based on the Gauss-Seidel method. A vector quantisation (VQ) scheme is developed to encode the frequency and the sequency components. Results and subjective evaluations are given for speech coding at 4.0 kbit/s.
引用
收藏
页码：473 / 481
页数：9
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