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Title: Fast intra mode decision algorithm for H.263 to H.264/AVC transcoding
Authors: Jing, X
Siu, WC 
Chau, LP
Constantinides, AG
Issue Date: 2008
Source: 2008 IEEE International Conference on Neural Networks and Signal Processing (ICNNSP 08) : Zhenjiang, China, June 8-10, 2008, p. 666-670
Abstract: In this paper, we present a fast mode decision method for H.263 to H.264/AVC intraframe transcoding. The proposed algorithm is based on the observation that features of DCT coefficients extracted from H.263 coded intraframe strongly relates to the optimal mode in H.264/AVC intra mode decision. Specifically, the total number of non-zero AC coefficients of four 8x8 DCT blocks in H.263 is taken as a measurement in the intra block size decision. The objective is to reject improbable block types in earlier stages in order to achieve computation saving. In addition, a transform domain edge direction estimation is also adopted into our scheme to further speed up the intra mode prediction. Simulation results show that the proposed approach can reduce the computational complexity of intraframe transcoding by up to 65% while maintaining the rate-distortion (R-D) performance.
Keywords: Transcoding
Mode decision
Publisher: IEEE
ISBN: 978-142-44-2311-8
Rights: © 2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
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