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Exploiting MPEG-7 texture descriptors for fast H.264 mode decision

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Original languageEnglish
Title of host publication15th IEEE International Conference on Image Processing, 2008 (ICIP 2008), San Diego, USA
Publisher or commissioning bodyInstitute of Electrical and Electronics Engineers (IEEE)
Pages2796 - 2799
ISBN (Print)9781424417650
StatePublished - 2008
Event15th International Conference on Image Processing - San Diego, CA, United States

Publication series

ISSN (Print)15224880


Conference15th International Conference on Image Processing
CountryUnited States
CitySan Diego, CA
Period1/10/08 → …


A novel technique for exploring the use of indexing metadata in improving coding efficiency is proposed in this paper. The technique uses an MPEG-7 descriptor as the basis for a fast mode decision algorithm for H.264/AVC encoders. The descriptor is used to form homogenous clusters for each frame, within which limited available coding modes for each macroblock are defined. The coding mode of an already coded macroblock that belongs to the same cluster in the same frame as well as the statistics of the coding modes of similar clusters in previous frames, are used for limiting the range of available coding modes within each cluster. The results show that the proposed algorithm is able to achieve an average of 47% time-saving when compared to the full search method and 21% when compared to the fast mode decision algorithm employed in the JM12.2 reference H.264 software encoder. In both cases, results yield only a small degradation in rate-distortion performance and a negligible loss in subjective quality

Additional information

Rose publication type: Conference contribution Additional information: With accompanying conference presentation Terms of use: Copyright © 2008 IEEE. Reprinted from IEEE International Conference on Image Processing (ICIP 2008). This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or 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 must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

    Research areas

  • metadata, video coding, H.264, mode decision, MPEG-7


15th International Conference on Image Processing

Duration1 Oct 2008 → …
CitySan Diego, CA
CountryUnited States

Event: Conference

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