<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The G.711 codec has been accepted as a standard for high quality coding in many applications. A dual-mode quantizer, which combines the nonlinear logarithmic quantizer for restricted input signals and G.711 quantizer for unrestricted input signals is proposed in this paper. The parameters of the proposed quantizer are optimized, where the minimal distortion is used as the criterion. It is shown that the optimized version of the proposed quantizer provides 5.4 dB higher SQNR (Signal to Quantization Noise Ratio) compared to G.711 quantizer, or equivalently it performs savings in the bit rate of approximately 0.9 bit/sample for the same signal quality. Although the complexity is slightly increased, we believe that due to the superior performance it can be successfully implemented for high-quality quantization.</p></abstract>

The G.711 codec has been accepted as a standard for high quality coding in many applications. A dual-mode quantizer, which combines the nonlinear logarithmic quantizer for restricted input signals and G.711 quantizer for unrestricted input signals is proposed in this paper. The parameters of the proposed quantizer are optimized, where the minimal distortion is used as the criterion. It is shown that the optimized version of the proposed quantizer provides 5.4 dB higher SQNR (Signal to Quantization Noise Ratio) compared to G.711 quantizer, or equivalently it performs savings in the bit rate of approximately 0.9 bit/sample for the same signal quality. Although the complexity is slightly increased, we believe that due to the superior performance it can be successfully implemented for high-quality quantization.

Dual-mode quasi-logarithmic quantizer with embedded G.711 codec

Deparment of Telecommunications, Faculty of Electronic Engineering

Journal of Electrical Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

{"article-title":"Dual-mode quasi-logarithmic quantizer with embedded G.711 codec"}

The G.711 codec has been accepted as a standard for high quality coding in many applications. A dual-mode quantizer, which combines the nonlinear logarithmic...

Dual-mode quasi-logarithmic quantizer with embedded G.711 codec

Published Online: Mar 07, 2018

Page range: 46 - 51

Received: May 24, 2017

DOI: https://doi.org/10.1515/jee-2018-0006

Keywords
scalar quantization, G.711 standard, Laplacian source, signal to noise ratio

© 2018 Bojan Denić et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Dual-mode quasi-logarithmic quantizer with embedded G.711 codec

Published Online: Mar 07, 2018

Page range: 46 - 51

Received: May 24, 2017

DOI: https://doi.org/10.1515/jee-2018-0006

Keywordsscalar quantization, G.711 standard, Laplacian source, signal to noise ratio

© 2018 Bojan Denić et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
scalar quantization, G.711 standard, Laplacian source, signal to noise ratio