open access

https://hdl.handle.net/2115/39743

Joint FMO and Adaptive Intra Refresh for Error Resilience in H.264 Video Coding

英語

2009-10-04

Asia-Pacific Signal and Information Processing Association, 2009 Annual Summit and Conference, International Organizing Committee

Proceedings : APSIPA ASC 2009 : Asia-Pacific Signal and Information Processing Association, 2009 Annual Summit and Conference

449-452

APSIPA ASC 2009: Asia-Pacific Signal and Information Processing Association, 2009 Annual Summit and Conference. 4-7 October 2009. Sapporo, Japan. Poster session: Image, Video, and Multimedia Signal Processing 2 (6 October 2009).

In this paper, we propose an explicit Flexible Macroblock Ordering (FMO) map using distortion from error propagation. The effects caused by the damaged MBs of the current frame to the next frame and the other MBs in the same slice group are estimated. These effects can be used in the evaluation of the MBs' importance in the current frame, and a suitable map with a reduced effect of error propagation can be generated. In addition, to counteract with error propagation, intra refresh is a known method used to reduce the dependency between frames therefore could stop error propagation. Taking into account the channel state information, this paper also proposes an intra refresh algorithm that chooses the number of intra MBs for each frame. MBs having much effectiveness to the current frame and the next frame will be chosen for intra coding mode. By coupling this method with proposed FMO, it would help reduce the loss of important and intra coded MB. Results show that the proposed method has some improvements in terms of PSNR and the number of undecodable macroblocks as compared to some other methods.

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