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The differential structure of sub pixels interpolated from integer pixels using n-tab FIR filters for high definition H.264 video encoding

Published: 23 October 2006 Publication History

Abstract

In this paper, we propose a differential structure of subpixels which are interpolated from integer pixels using ntab linear FIR filters. The generation and management of sub-pixels are a very serious problem in high-definition H.264 video encoding. Since the amount of sub-pixels in H.264 encoding is about 16 times larger than that of integer pixels, H.264 encoder needs very high speed memory access for realtime encoding of high-definition video. In order to avoid the sub-pixel problem, we estimate the distortion value for a motion estimation of sub-pixel resolution by using the nonlinear combination of the distortion value derived from a motion estimation of related integer pixel, based on the proposed differential structure. Simulation results show that the proposed mathematical properties are valid by the sub-pixel motion estimation based on the proposed mathematical analysis. It also shows that the proposed sub-pixel motion estimation is so effective that the encoding speed is dramatically increased without a considerable depression of video quality.

References

[1]
J. V. T. of ISO/IEC MPEG ITU-T VCE. Draft itu-t recommendation and final draft international standard of joint video specification. ITU-T Rec. H.264 -- ISO/IEC 14496-10 AVC, September 2001.
[2]
J. Suh and J. Jeong. Fast sub-pixel motion estimation techniques having lower computational complexity. IEEE Transactions on Consumer Electronics, 50(3):968--973, August 2004.

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  • (2010)Specification of hierarchical-model-based fast quarter-pixel motion estimationOptical Engineering10.1117/1.345438949:6(067003)Online publication date: 1-Jun-2010

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  1. The differential structure of sub pixels interpolated from integer pixels using n-tab FIR filters for high definition H.264 video encoding

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    cover image ACM Conferences
    MM '06: Proceedings of the 14th ACM international conference on Multimedia
    October 2006
    1072 pages
    ISBN:1595934472
    DOI:10.1145/1180639
    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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    New York, NY, United States

    Publication History

    Published: 23 October 2006

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    Author Tags

    1. H.264
    2. differential structure
    3. fast encoding
    4. sub-pixel

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    MM06
    MM06: The 14th ACM International Conference on Multimedia 2006
    October 23 - 27, 2006
    CA, Santa Barbara, USA

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    Overall Acceptance Rate 1,639 of 6,626 submissions, 25%

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    • (2010)Specification of hierarchical-model-based fast quarter-pixel motion estimationOptical Engineering10.1117/1.345438949:6(067003)Online publication date: 1-Jun-2010

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