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Frame loss error concealment for SVC

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第5期7卷 677-683页

作者： PANDIT Purvin BOYCE Jill THOMSON Corporate Research Princeton NJ 08540 USA

Scalable video coding (SVC), as the Scalable Extension of H.264/AVC, is an ongoing international video coding standard designed for network adaptive or device adaptive applications and also offers high coding efficiency. However, packet losses often occur over unreliable networks even for base layer of SVC and have severe impact on the playback quality of compressed video. Until now, no literature has discussed error concealment support for standard SVC bit-stream. In this paper, we provide robust and effective error concealment techniques for SVC with spatial scalability. Experimental results showed that the proposed methods provide substantial improvement, both subjectively and objectively, without a significant complexity overhead.

关键词： Adaptive systems coding errors Computer networks Image compression Robustness (control systems) Standards

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The Effects of The Error Events Length on The Performance of TCM in Wireless Communications

The Effects of The Error Events Length on The Performance of...

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1998 International Conference on Communication Technology

作者： Pingyi Fan Xiang-Gen Xia Zhigang Cao Dept.Electronic Engineering Tsinghua University Dept.ECE University of DelawareNewarkDE 19711. Dept.Electrical and Computer Engineering University of DelawareNewarkDE 19716. Dept.of Electronic Engineering Tsinghua University

ISBN: (纸本)7800908275

＜正＞In this paper,we investigate the effect of the error events length on the performance of TCM over wireless channels by using the generating *** numerical results have shown that the performance of TCM is dominated by the error events with the first few shortest lengths when the signal to noise ratio（SNR） is in the reasonable ranges in *** some cases,the performance of TCM is not dominated by the error events with the same length associated by the free Euclidean distance events over an AWGN ***,the performance of TCM may not be dominated by the error events having the shortest length over a Rayleigh fading *** results provide us a new way to estimate or predict the performance for a given TCM code over wireless channels.

关键词： trellis coded modulation AWGN channels Rayleigh channels coding errors radiocommunication error events length performance TCM wireless communications wireless channels generating function signal to noise ratio SNR free Euclidean distance AWGN channel Rayleigh fading channel

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