基於使用FMO的 H.264/AVC視訊傳輸抗錯誤方法

An error-resilient scheme based on new FMO for H.264 video transmission

涂日昇(Jih-Sheng Tu)

指導教授 ： 張隆紋

國立清華大學/電機資訊學院/資訊系統與應用研究所/碩士(2007年)

https://doi.org/10.6843/NTHU.2007.00323

摘要

H.264/AVC為新一代的視訊編碼標準，由於它相較於傳統的編碼標準而言有更佳的壓縮比，加強了網路友善性的設計以及提供錯誤回復工具來回復錯誤的影像，所以使得H.264適用於各種多媒體傳輸環境；然而在網路傳輸的過程中，發生封包遺失或錯誤是不可避免的，尤其是以無線網路為傳輸媒介時更是顯著。因此，本篇論文希望能運用H.264錯誤回復工具裡的FMO與RS來加強遺失封包時的受損的影像品質，我們運用了FMO的第六種類型，它能讓我們自訂MBAmap用以設計出較能將錯誤擴散的FMO類型，使得遺失的MB周圍有較多正確接收的MB，藉此才能更正確的修復該遺失的MB；實驗結果顯示，我們提出的方法確實能有效抵抗封包遺失後影像品質的衰減，並且相對於原始的FMO類型來說，我們能提供更好更穩定的影像品質。

關鍵字

H.264/AVC ； 錯誤回復工具

並列摘要

H.264/AVC is the newest video coding standard of the ITU-T Video Coding Experts Group and the ISO/IEC Moving Picture Experts Group. The H.264/AVC standard is designed to provide high compression performance and a “network-friendly” video representation and error resilience tools, and hence it is suitable for different types of network applications, such as conversational (video telephony), streaming, storage, and broadcast. However, the error resilience tools provided by H.264 are not good enough to handle the packet loss situation when video is transmitted over error-prone channels. In this paper, we propose a video coding method that enhances the error resilient functionality of H.264, the proposed method merges the explicit type of Flexible Macroblock Ordering (FMO) with a redundant macroblock strategy for I-frame. Experimental results are presented to show that the proposed scheme performs well against packet loss errors and gives outstanding enhancement over the existing H.264 FMO disperse type.

並列關鍵字

error resilience ； H.264/AVC ； Flexible Macroblock Ordering

參考文獻

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[1] Joint Video Team of ITU-T VCEG and ISO/IEC MPEG, “Advanced Video Coding for Generic Audiovisual Services,” ITU-T Rec. H.264 and ISO/IEC 14496-10 (MPEG4-AVC), v4, July 2005.