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Title: Fast DCT to IT conversion using integer approximation for H.263 to H.264 video transcoding
Authors: Fung, KT
Siu, WC 
Constantinides, AG
Keywords: Video transcoder
DCT coefficients
Integer transform coefficients
Video coding standards
Issue Date: 2005
Publisher: IEEE
Source: 2005 IEEE International Workshop on VLSI Design and Video Technology : proceedings : May 28-30, 2005, Suzhou, China, p. 377-380 How to cite?
Abstract: In this paper, a compressed domain video transcoder for H.263 to H.264 is proposed. The proposed video transcoder focuses on the conversion of DCT coefficients to Integer Transform (IT) coefficients. A set of operators is derived for converting the DCT coefficients to integer transform coefficients in the compressed domain. Using these operators, the proposed architecture is able to transcode the DCT coefficients to the integer transform coefficients directly. The integer approximation of the operators is proposed to avoid the floating point implementation for the proposed transcoder. Experimental results show that the proposed video transcoder can reduce substantially the amount of computation and provide transcoded videos with similar quality as compared with those obtained from the conventional cascaded video transcoder.
ISBN: 0-7803-9005-9
Rights: © 2005 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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