A FREQUENCY DOMAIN APPROACH TO INTRA MODE SELECTION IN H.264/AVC (WedPmOR5)

Author(s) : Andy Yu (University of Warwick, United Kingdom) Graham Martin (University of Warwick, United Kingdom) Heechan Park (University of Warwick, United Kingdom)

Abstract : Multiple intra-mode prediction is one of the new features introduced in the emerging video standard, H.264/AVC. Its function is to further reduce spatial redundancies in an intra-coded macroblock prior to conventional transform coding and entropy coding. However, the process is computationally expensive especially when Lagrangian cost evaluation is employed. In this paper, we propose a fast algorithm operating in the frequency domain to accelerate intra-frame mode selection. Extensive simulations verify that the proposed algorithm outperforms several existing methods, providing speed-ups of up to 75% with insignificant degradation in picture quality.

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