An Efficient Mode Decision Algorithm Based on Dynamic Grouping and Adaptive Adjustment for H.264/AVC

B. Zhan, B. Hou, R. Sotudeh

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

    1 Citation (Scopus)
    42 Downloads (Pure)

    Abstract

    The rate distortion optimization (RDO) enabled mode decision (MD) is one of the most important techniques introduced by H.264/AVC. By adopting the exhaustive calculation of rate distortion, the optimal MD enhances the video encoding quality. However, the computational complexity is significantly increased, which is a key challenge for real-time and low power consumption applications. This paper presents a new fast MD algorithm for highly efficient H.264/AVC encoder. The proposed algorithm employs a dynamic group of candidate inter/intra modes to reduce the computational cost. In order to minimize the performance loss incurred by improper mode selection for the previously encoded frames, an adaptive adjustment scheme based on the undulation of bitrate and PSNR is suggested. Experimental results show that the proposed algorithm reduces the encoding time by 35% on average, and the loss of PSNR is usually limited in 0.1 dB with less than 1% increase of bitrate.
    Original languageEnglish
    Title of host publicationProcs IEEE Int Symposium on Signal Processing and Information Technology, ISSPIT 2007
    PublisherInstitute of Electrical and Electronics Engineers (IEEE)
    Pages785-790
    ISBN (Print)978-1-4244-1835-0
    DOIs
    Publication statusPublished - 2007

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