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IEICE Transactions on Information and Systems 2008 E91-D(1):70-77; doi:10.1093/ietisy/e91-d.1.70
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Copyright © 2008 The Institute of Electronics, Information and Communication Engineers

Regular Section -- Papers -- Image Processing and Video Processing

Video Error Concealment Using Fidelity Tracking

Akio YONEYAMA1, Yasuhiro TAKISHIMA1, Yasuyuki NAKAJIMA1 and Yoshinori HATORI2

1 The authors are with KDDI R&D Laboratories Inc., Fujimino-shi, 356–8502 Japan. E-mail: yoneyama{at}kddilabs.jp, 2 The author is with Tokyo Institute of Technology, Yokohama-shi, 226–8503 Japan.


  Abstract

We propose a method to prevent the degradation of decoded MPEG pictures caused by video transmission over error-prone networks. In this paper, we focus on the error concealment that is processed at the decoder without using any backchannels. Though there have been various approaches to this problem, they generally focus on minimizing the degradation measured frame by frame. Although this frame-level approach is effective in evaluating individual frame quality, in the sense of human perception, the most noticeable feature is the spatio-temporal discontinuity of the image feature in the decoded video image. We propose a novel error concealment algorithm comprising the combination of i) A spatio-temporal error recovery function with low processing cost, ii) A MB-based image fidelity tracking scheme, and iii) An adaptive post-filter using the fidelity information. It is demonstrated by experimental results that the proposed algorithm can significantly reduce the subjective degradation of corrupted MPEG video quality with about 30 % of additional decoding processing power.

Key Words: error concealment, MPEG, H.264/AVC, error resilience

Manuscript received October 20, 2006. Manuscript revised April 23, 2007.


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