增强的编码器，具有错误恢复能力

Proceedings of the Fourth IEEE International Caracas Conference on Devices, Circuits and Systems (Cat. No.02TH8611) Pub Date : 2002-08-07 DOI:10.1109/ICCDCS.2002.1004112

A. Basu, S. Shreinivasan, W. Moreno

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引用次数: 1

摘要

一个可扩展的视频编码器产生一个比特流，可在不同的比特率解码。它可以大大提高在容易出错的信道(如Internet或无线)上传输的视频的质量。可扩展视频编码利用运动预测实现更高的压缩效率。由于使用运动补偿来减少时间冗余，解码后的视频质量可能会因时域误差的传播而下降。因此，本文将双矢量运动补偿(DMC)应用于可扩展视频编码器中。采用了基于梯度下降法的搜索策略。在本研究中，使用了错误隐藏技术，该技术通过利用视频序列中的相关性来估计丢失的运动向量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Enhanced coder with error resilience

A scalable video coder produces a bit stream, decodable at different bit rates. It can substantially improve the quality of video transmitted over error prone channels such as Internet or wireless. The scalable video coding utilizes motion prediction to achieve higher compression efficiency. Since motion compensation is used to reduce temporal redundancy, the quality of the decoded video may decay due to the propagation of errors in the temporal domain. Hence, the double-vector motion compensation (DMC) is used in the scalable video coder, which is implemented in this work. Search strategies based on gradient-descent methods are used. In this study, error concealment techniques are used, which estimate the lost motion vectors by exploiting correlation within the video sequences.

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Proceedings of the Fourth IEEE International Caracas Conference on Devices, Circuits and Systems (Cat. No.02TH8611)

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