Block effect reduction for the two-layer video codec based on MPEG-2

Taehwan Shin; Tae-Sun Choi

doi:10.1117/12.298332

9 January 1998 Block effect reduction for the two-layer video codec based on MPEG-2

Taehwan Shin, Tae-Sun Choi

Proceedings Volume 3309, Visual Communications and Image Processing '98; (1998) https://doi.org/10.1117/12.298332
Event: Photonics West '98 Electronic Imaging, 1998, San Jose, CA, United States

Abstract

In this paper, we describe the two-layer video codec based on MPEG-2 and its layering algorithms, where we exploit the property that the human vidual system is more sensitive to low frequency coefficients than high frequency coefficients in the DCT domain. We prose a new bloc effect reduction algorithm, called content-based AC correction, which predicts AC coefficients considering the image content itself in the DCT domain; because the block effect occurs in a block which has few AC coefficients in DCT domain. First, this algorithm detects which block has a block effect. Secondly, this algorithm detects if a block is located near the edge or a boundary of video object. If the block is located near any edge or boundary, a new AC correction algorithm is used. Otherwise, the traditional AC correction algorithm is used.

Citation Download Citation

Taehwan Shin and Tae-Sun Choi "Block effect reduction for the two-layer video codec based on MPEG-2", Proc. SPIE 3309, Visual Communications and Image Processing '98, (9 January 1998); https://doi.org/10.1117/12.298332

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