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robust coding of wideband speech immittance spectral frequencies

speech COMMUNICATION 2014年 65卷 94-108页

作者： Salah-Eddine, Cheraitia Merouane, Bouzid USTHB Elect Fac Speech Commun & Signal Proc Lab Algiers 16111 Algeria

In this paper, we propose a reduced complexity stochastic joint source-channel coding system developed for efficient and robust coding of wideband speech ISF (Immittance Spectral Frequency) parameters. Initially, the aim of this encoding system was to achieve a transparent quantization of ISF parameters for ideal transmissions over a noiseless channels. It was designed based on the switched split vector quantization (SSVQ) technique and called "ISF-SSVQ coder". After that, our interest was drawn to the improvement of the ISF-SSVQ robustness for transmissions over a noisy channel. To protect implicitly our ISF coders, we developed a stochastic joint source-channel coding system based on a reduced complexity version of the channel optimized SSVQ technique. Simulation results will show that our new encoding system, called ISF-SCOSSVQ coder, can provide a good implicit protection to ISF parameters. The ISF-SCOSSVQ coder was further used to encode the ISF parameters of the Adaptive Multi-rate Wideband (AMR-WB, ITU-T G.722.2) speech coder operating over a noisy channel. We will show that the proposed ISF-SCOSSVQ coder contribute significantly in the improvement of the AMR-WB performance by ensuring a good coding robustness of its ISF parameters. (C) 2014 Elsevier B.V. All rights reserved.

关键词： SSVQ quantization Source-channel coding robust speech coding ISF parameters Wideband speech coder

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Reduced complexity algorithm for channel optimized switched split vector quantization: Application to wideband LSF parameters

Reduced complexity algorithm for channel optimized switched ...

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IEEE Jordan Conference on Applied Electrical Engineering and Computing Technologies (AEECT)

作者： Salah-Eddine, Cheraitia Bouzid, Merouane USTHB Univ Elect Fac Dept Telecommun Algiers Algeria

ISBN: (纸本)9781479923052;9781479923038

In this paper, a reduced complexity stochastic joint source-channel coding system is proposed for efficient and robust coding of wideband speech LSF (Line Spectral Frequencies) parameters. The aim of the initial version of this system was to achieve a transparent quantization quality of LSF parameters under noiseless channel conditions. It was developed based on the switched split vector quantization (SSVQ) technique and called "LSF-SSVQ coder". After that, we were interested on the improvement of the LSF-SSVQ coder robustness for real transmissions over a noisy channel. To protect implicitly our wideband LSF encoders, we developed a non-redundant joint source-channel coding system based on a reduced complexity stochastic version of the channel optimized SSVQ technique.

关键词： SSVQ Quantization source-channel coding robust speech coding LSF parameters

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Reduced complexity system for robust encoding of wideband speech LSF parameters

Reduced complexity system for robust encoding of wideband sp...

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Saudi International Electronics, Communications and Photonics Conference (SIECPC)

作者： Cheraitia, Salah Eddine Bouzid, Merouane Univ Sci & Technol Houari Boumediene Elect Fac Dept Telecommun Algiers 16111 Algeria

ISBN: (纸本)9781467361958;9781467361965

In this paper, we present a reduced complexity joint-source channel coding system developed for efficient and robust coding of wideband speech line spectral frequencies (LSF) parameters. Initially, the aim of this encoding system was to achieve a transparent quantization of LSF parameters for ideal transmissions over noiseless channels. It was designed based on the switched split vector quantization (SSVQ) and called "LSF-SSVQ encoder". After that, our interest was drawn to the improvement of the LSF-SSVQ encoder robustness for real transmissions over a noisy channel. To protect implicitly our LSF encoder, we proposed a non-redundant joint source-channel coding system based on a reduced complexity version of the channel optimized switched split vector quantization technique.

关键词： Source coding Switched SVQ Source-channel coding robust speech coding wideband LSF AMR-WB G.722.2

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A basic experiment on time-varying speech quality

A basic experiment on time-varying speech quality

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Measurement of speech and Audio Quality in Networks, MESAQIN 2005

作者： Voran, Stephen D. Institute for Telecommunication Sciences United States

We present a general formulation of a basic open question regarding the perception of time-varying speech quality. We then describe the design, implementation, conduct, and analysis of a practical experiment that addresses a small but fundamental part of that open question. In this experiment, listeners rate the overall speech quality of single sentence stimuli that contain two different levels of nominal speech quality and two transitions between these levels. We present several results including those related to human integration of speech quality and the recency effect. Finally, we discuss these results and suggest potential additional work that might build upon them.

关键词： robust speech coding Subjective listening experiment Time-varying speech quality

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