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Author Hoang, D.T. ♦ Long, P.M. ♦ Vitter, J.S.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©1994
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Video coding ♦ Video compression ♦ Motion estimation ♦ Rate-distortion ♦ Discrete cosine transforms ♦ Minimization methods ♦ Computer science ♦ Application software ♦ Bit rate ♦ Heuristic algorithms
Abstract Compares methods for choosing motion vectors for motion-compensated video compression. The primary focus is on videophone and videoconferencing applications, where very low bit rates are necessary, where the motion is usually limited, and where the frames must be coded in the order they are generated. the authors provide evidence, using established benchmark videos of this type, that choosing motion vectors to minimize codelength subject to (implicit) constraints on quality yields substantially better rate-distortion tradeoffs than minimizing notions of prediction error. They illustrate this point using an algorithm within the p/spl times/64 standard. They show that using quadtrees to code the motion vectors in conjunction with explicit codelength minimization yields further improvement. They describe a dynamic-programming algorithm for choosing a quadtree to minimize the codelength.<<ETX>>
Description Author affiliation: Dept. of Comput. Sci., Duke Univ., Durham, NC, USA (Hoang, D.T.; Long, P.M.; Vitter, J.S.)
ISBN 0818656379
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 1994-03-29
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 576.47 kB
Page Count 10
Starting Page 175
Ending Page 184

Source: IEEE Xplore Digital Library