Block Constrained Trellis Coded Vector Quantization of LSF Parameters for Wideband Speech Codecs
نویسندگان
چکیده
ETRI Journal, Volume 30, Number 5, October 2008 ABSTRACT⎯In this paper, block constrained trellis coded vector quantization (BC-TCVQ) is presented for quantizing the line spectrum frequency parameters of the wideband speech codec. Both a predictive structure and a safety-net concept are combined into BC-TCVQ to develop the predictive BC-TCVQ. The performance of this quantization is compared with that of the linear predictive coding vector quantizer used in the AMRWB codec, demonstrating reductions in spectral distortion.
منابع مشابه
Quantization of LSF parameters using a trellis modeling
An efficient Block-based Trellis Quantization (BTQ) scheme is proposed for the quantization of the Line Spectral Frequencies (LSF) in speech coding applications. The scheme is based on the modeling of the LSF intraframe dependencies with a trellis structure. The ordering property and the fact that LSF parameters are bounded within a range is explicitly incorporated in the trellis model. BTQ sea...
متن کاملQuantization of LSF Parameters Using A Trellis Modelling
An efficient Block-based Trellis Quantization (BTQ) scheme is proposed for the quantization of the Line Spectral Frequencies (LSF) in speech coding applications. The scheme is based on the modelling of the LSF intraframe dependencies with a trellis structure. The ordering property and the fact that LSF parameters are bounded within a range is explicitly incorporated in the trellis model. BTQ se...
متن کاملCodage conjoint source-canal des paramètres lsf du codeur FS1016: application de la quantification vectorielle par treillis optimisée pour un canal bruité
In this paper, we present an optimized trellis coded vector quantization (TCVQ) coding system designed for the effective and robust coding of LSF spectral parameters at low bit rate. The aim of this system, called at the beginning « LSF-OTCVQ Encoder », is to achieve a low bit rate transparent quantization of LSF parameters of the US Federal Standard (FS1016) speech Codage conjoint source-canal...
متن کاملWideband speech coding, speech spectral quantisation Speech Spectral Quantizers for Wideband Speech Coding
In this treatise a range of Line Spectrum Frequency (LSF) Vector Quantization (VQ) schemes were studied comparatively, which were designed for wideband speech codecs. Both predictive arrangements and memoryless schemes were investigated. Specifically, both memoryless Split Vector Quantization (SVQ) and Classified Vector Quantization (CVQ) were studied. These techniques exhibit a low complexity ...
متن کاملIntra-frame and Inter-frame Coding of Speech LSF Parameters Using A Trellis Structure
Linear Predictive Coding (LPC) parameters are widely used in various speech processing applications for representation of the spectral envelope of speech. Low bit-rate speech coding applications, require accurate quantization of these parameters using as few bits as possible. Line Spectral Frequency (LSF) representation is the most widely accepted representation of LPC parameters for quantizati...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2008