ICIP 2006, Atlanta, GA
 

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Paper Detail

Paper:MP-P3.4
Session:Transcoding
Time:Monday, October 9, 14:20 - 17:00
Presentation: Poster
Topic: Image & Video Coding: Transcoding
Title: MODE REFINEMENT ALGORITHM FOR H.264 INTER FRAME REQUANTIZATION
Authors: Damien Lefol; University of Bristol 
 David R. Bull; University of Bristol 
Abstract: The latest video coding standard H.264 has been recently approved and has already been adopted for numerous applications including HD-DVD and satellite broadcast. To allow interconnectivity between different applications using H.264, transcoding will be a key factor. When requantizing a bitstream the incoming coding decisions are usually kept unchanged to reduce the complexity, but it can have a major impact on the coding efficiency. This paper proposes a novel algorithm for mode refinement of inter prediction in the case of requantization of H.264 bitstreams. The proposed approach gives a comparable quality to a full search for a fraction of its complexity by exploiting the statistical properties of the mode distribution and motion vector refinement.