Single-iteration full-search fractional motion estimation for quad full HD H.264/AVC encoding

  • Authors:

  • Pei-Kuei Tsung;Wei-Yin Chen;Li-Fu Ding;Chuan-Yung Tsai;Tzu-Der Chuang;Liang-Gee Chen

  • Affiliations:

  • DSP/IC Design Lab, Graduated Institute of Electronics Engineering, National Taiwan University, Taipei, Taiwan;DSP/IC Design Lab, Graduated Institute of Electronics Engineering, National Taiwan University, Taipei, Taiwan;DSP/IC Design Lab, Graduated Institute of Electronics Engineering, National Taiwan University, Taipei, Taiwan;DSP/IC Design Lab, Graduated Institute of Electronics Engineering, National Taiwan University, Taipei, Taiwan;DSP/IC Design Lab, Graduated Institute of Electronics Engineering, National Taiwan University, Taipei, Taiwan;DSP/IC Design Lab, Graduated Institute of Electronics Engineering, National Taiwan University, Taipei, Taiwan

  • Venue:
  • ICME'09 Proceedings of the 2009 IEEE international conference on Multimedia and Expo
  • Year:
  • 2009

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Abstract

Fractional motion estimation (FME) is widely used in video compression standards. In H.264/AVC, the precision of motion vector is down to quarter pixels to improve the coding efficiency. However, FME occupies over 45% of the computation complexity in an H.264 encoder and this high complexity limits the processing capability. In this paper, a single-iteration full search FME is proposed. By the algorithm and architecture co-optimization, the bandwidth to the frame buffer is reduced by 31%. Furthermore, 82% of circuit area for the Hadamard transformation and subtraction are saved from the direct implementation. Compared with prior arts, the proposed design supports 3.39× higher throughput with only 0.02 dB PSNR drop. Thus, the specification of 4096 × 2160 quad full high definition H.264/AVC FME processing can be achieved.