Boundary block-searching algorithm for arbitrary shaped coding

Chia H. Yeh; Hsuan-Ting Chang

doi:10.1117/1.2013268

1 August 2005 Boundary block-searching algorithm for arbitrary shaped coding

Chia H. Yeh, Hsuan-Ting Chang

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Optical Engineering, Vol. 44, Issue 8, 087012 (August 2005). https://doi.org/10.1117/1.2013268

Abstract

Arbitrary shaped coding is an important issue of MPEG-4. In this study, an efficient shaped coding method, called the boundary block-searching (BBS) algorithm, which can enhance the coding efficiency of conventional padding schemes, is proposed. The proposed BBS algorithm assumes that boundary blocks have strong correlation even though they are not connected. For an input boundary block, the most similar block (only object pixels are considered) is sought from the previously coded data. Instead of being encoded by the use of discrete cosine transform, the boundary block is encoded by a position vector, which indicates the relative position of the most similar block. Therefore, the number of bits required to denote the boundary block is greatly reduced and low bit rate can be achieved. For two video sequences under different test conditions, simulation results show that the proposed BBS algorithm can greatly improve coding efficiency.

©(2005) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Chia H. Yeh and Hsuan-Ting Chang "Boundary block-searching algorithm for arbitrary shaped coding," Optical Engineering 44(8), 087012 (1 August 2005). https://doi.org/10.1117/1.2013268

Published: 1 August 2005

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KEYWORDS

Video

Liquid phase epitaxy

Distortion

Optical engineering

Video coding

Computer simulations

Linear filtering

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