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Adaptive mode-dependent scan for H.264/AVC intracoding

[+] Author Affiliations
Yung-Chiang Wei

Far East University, Department of Electronic Engineering, No. 49, Chung-Hua Road, Hsin-Shih, Tainan County 744, Taiwan

Jar-Ferr Yang

National Cheng Kung University, Institute of Computer and Communication Engineering, Department of Electrical Engineering, No. 1, University Road, Tainan 710, Taiwan

J. Electron. Imaging. 19(3), 033008 (August 11, 2010). doi:10.1117/1.3476330
History: Received October 14, 2009; Revised June 23, 2010; Accepted June 28, 2010; Published August 11, 2010; Online August 11, 2010
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In image/video coding standards, the zigzag scan provides an effective encoding order of the quantized transform coefficients such that the quantized coefficients can be arranged statistically from large to small magnitudes. Generally, the optimal scan should transfer the 2-D transform coefficients into 1-D data in descending order of their average power levels. With the optimal scan order, we can achieve more efficient variable length coding. In H.264 advanced video coding (AVC), the residuals resulting from various intramode predictions have different statistical characteristics. After analyzing the transformed residuals, we propose an adaptive scan order scheme, which optimally matches up with intraprediction mode, to further improve the efficiency of intracoding. Simulation results show that the proposed adaptive scan scheme can improve the context-adaptive variable length coding to achieve better rate-distortion performance for the H.264/AVC video coder without the increase of computation.

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Citation

Yung-Chiang Wei and Jar-Ferr Yang
"Adaptive mode-dependent scan for H.264/AVC intracoding", J. Electron. Imaging. 19(3), 033008 (August 11, 2010). ; http://dx.doi.org/10.1117/1.3476330


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