Title :
Adaptive forward-backward quantizer for low bit rate high-quality speech coding
Author :
Vass, J. ; Yunxin Zhao ; Xinhua Zhuang
Author_Institution :
Dept. of Comput. Eng., Missouri Univ., Columbia, MO
fDate :
11/1/1997 12:00:00 AM
Abstract :
A novel variable-rate linear predictive coding (LPC) parameter quantization scheme is proposed, in which linear prediction is done by using either the current (forward LPC) or previously decoded (backward LPC) speech blocks. The proposed LPC quantization scheme was integrated into the FS1016 Federal Standard CELP coder. Significant LPC bit rate reduction is achieved without compromising the decoded speech quality
Keywords :
adaptive codes; linear predictive coding; quantisation (signal); spectral analysis; speech coding; speech intelligibility; variable rate codes; FS1016 Federal Standard CELP coder; LPC parameter quantization; adaptive forward-backward quantizer; bit rate reduction; decoded speech quality; high quality speech coding; logarithmical spectral distortion measure; low bit rate coding; speech blocks; variable rate linear predictive coding; Bandwidth; Bit rate; Code standards; Decoding; Delay; Linear predictive coding; NASA; Quantization; Speech analysis; Speech coding;
Journal_Title :
Speech and Audio Processing, IEEE Transactions on
