Robust Transmission of Wavelet Video Sequence over Wireless Communication Channels

Joo-Kyong LEE  Ki-Dong CHUNG  

Publication
IEICE TRANSACTIONS on Information and Systems   Vol.E87-D   No.7   pp.1633-1640
Publication Date: 2004/07/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8532
Type of Manuscript: Special Section PAPER (Special Section on Hardware/Software Support for High Performance Scientific and Engineering Computing)
Category: Networking and System Architectures
Keyword: 
wavelet transform,  intra-frame motion estimation,  error propagation,  error resilience,  MRME,  

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Summary: 
Bit-errors in a subband of a wavelet-based video frame during network transmission affect not only lower-level subbands within the same frame but also the subsequent frames. This is because the video frame is wavelet-transformed image with multi-levels and referenced from later frames. In this paper, we propose a new motion estimation scheme for wavelet-based video called Intra-frame Motion Estimation (IME), in which each subband except the LL subband refers to the 1-level-lower subband in the same orientation within the same frame. This scheme protects video quality by confining the effects of the bit-errors of all subbands, except the LL subband, within a frame. We evaluated the performance of our proposed scheme in a simulated wireless network environment. As a result of tests, it was shown that the proposed IME algorithm performs better than MRME, a motion-compensated video coding scheme for wavelet video, in a heavy motion video sequence, while IME outperforms MRME at a high bit-rate in small motion video sequence.