The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
A Codificação de Vídeo Distribuída (DVC) é um paradigma emergente de codificação de vídeo que se caracteriza por uma arquitetura flexível para projetar codificadores de vídeo de custo muito baixo. Esse recurso pode ser utilizado de maneira muito eficaz em diversas aplicações potenciais de codificação de vídeo do tipo muitos para um. No entanto, a eficiência de compressão das mais recentes implementações DVC ainda fica aquém do estado da arte em tecnologias de codificação de vídeo convencionais, nomeadamente H.264/AVC. Neste artigo, um novo algoritmo de quantização não linear é proposto para DVC a fim de melhorar o desempenho da distorção de taxa (RD). Espera-se que a solução proposta explore a contribuição dominante para a qualidade da imagem dos coeficientes relativamente pequenos quando a alta concentração dos coeficientes perto de zero é evidente quando o sinal de vídeo de entrada residual para os quadros Wyner-Ziv é considerado no domínio de transformação. O desempenho da solução proposta incorporando o quantizador não linear é comparado com o desempenho de uma solução DVC de domínio de transformação existente que utiliza um quantizador linear. Os resultados da simulação mostram um desempenho RD consistentemente melhorado em todas as taxas de bits quando diferentes sequências de vídeo de teste com níveis variados de movimento são consideradas.
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Murat B. BADEM, Rajitha WEERAKKODY, Anil FERNANDO, Ahmet M. KONDOZ, "Design of a Non-linear Quantizer for Transform Domain DVC" in IEICE TRANSACTIONS on Fundamentals,
vol. E92-A, no. 3, pp. 847-852, March 2009, doi: 10.1587/transfun.E92.A.847.
Abstract: Distributed Video Coding (DVC) is an emerging video coding paradigm that is characterized by a flexible architecture for designing very low cost video encoders. This feature could be very effectively utilized in a number of potential many-to-one type video coding applications. However, the compression efficiency of the latest DVC implementations still falls behind the state-of-the-art in conventional video coding technologies, namely H.264/AVC. In this paper, a novel non-linear quantization algorithm is proposed for DVC in order to improve the rate-distortion (RD) performance. The proposed solution is expected to exploit the dominant contribution to the picture quality from the relatively small coefficients when the high concentration of the coefficients near zero as evident when the residual input video signal for the Wyner-Ziv frames is considered in the transform domain. The performance of the proposed solution incorporating the non-linear quantizer is compared with the performance of an existing transform domain DVC solution that uses a linear quantizer. The simulation results show a consistently improved RD performance at all bitrates when different test video sequences with varying motion levels are considered.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.E92.A.847/_p
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@ARTICLE{e92-a_3_847,
author={Murat B. BADEM, Rajitha WEERAKKODY, Anil FERNANDO, Ahmet M. KONDOZ, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Design of a Non-linear Quantizer for Transform Domain DVC},
year={2009},
volume={E92-A},
number={3},
pages={847-852},
abstract={Distributed Video Coding (DVC) is an emerging video coding paradigm that is characterized by a flexible architecture for designing very low cost video encoders. This feature could be very effectively utilized in a number of potential many-to-one type video coding applications. However, the compression efficiency of the latest DVC implementations still falls behind the state-of-the-art in conventional video coding technologies, namely H.264/AVC. In this paper, a novel non-linear quantization algorithm is proposed for DVC in order to improve the rate-distortion (RD) performance. The proposed solution is expected to exploit the dominant contribution to the picture quality from the relatively small coefficients when the high concentration of the coefficients near zero as evident when the residual input video signal for the Wyner-Ziv frames is considered in the transform domain. The performance of the proposed solution incorporating the non-linear quantizer is compared with the performance of an existing transform domain DVC solution that uses a linear quantizer. The simulation results show a consistently improved RD performance at all bitrates when different test video sequences with varying motion levels are considered.},
keywords={},
doi={10.1587/transfun.E92.A.847},
ISSN={1745-1337},
month={March},}
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TY - JOUR
TI - Design of a Non-linear Quantizer for Transform Domain DVC
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 847
EP - 852
AU - Murat B. BADEM
AU - Rajitha WEERAKKODY
AU - Anil FERNANDO
AU - Ahmet M. KONDOZ
PY - 2009
DO - 10.1587/transfun.E92.A.847
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E92-A
IS - 3
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - March 2009
AB - Distributed Video Coding (DVC) is an emerging video coding paradigm that is characterized by a flexible architecture for designing very low cost video encoders. This feature could be very effectively utilized in a number of potential many-to-one type video coding applications. However, the compression efficiency of the latest DVC implementations still falls behind the state-of-the-art in conventional video coding technologies, namely H.264/AVC. In this paper, a novel non-linear quantization algorithm is proposed for DVC in order to improve the rate-distortion (RD) performance. The proposed solution is expected to exploit the dominant contribution to the picture quality from the relatively small coefficients when the high concentration of the coefficients near zero as evident when the residual input video signal for the Wyner-Ziv frames is considered in the transform domain. The performance of the proposed solution incorporating the non-linear quantizer is compared with the performance of an existing transform domain DVC solution that uses a linear quantizer. The simulation results show a consistently improved RD performance at all bitrates when different test video sequences with varying motion levels are considered.
ER -