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A Hardware-Efficient H.264/AVC Motion-Estimation Design for High-Definition Video

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4 Author(s)
Yu-Kun Lin ; Inst. of Electron., Nat. Chiao-Tung Univ., Hsinchu ; Chia-Chun Lin ; Tzu-Yun Kuo ; Tian-Sheuan Chang

Motion estimation (ME) in high-definition H.264 video coding presents a significant design challenge for memory bandwidth, latency, and cost because of its large search range and various modes. To conquer this problem, this paper presents a low-latency and hardware-efficient ME design with three design techniques. The first technique on integer-pel ME (IME) adopts parallel instead of serial multiresolution search so that we can process 1080 p @ 60 fps videos with plusmn128 search range within just 256 cycles, 5.95-KB buffers, and 213.7 K gates. The second technique on fractional-pel ME (FME) uses a single-iteration six-point search to reduce the cycle count by half with similar gate count and negligible quality loss. The third technique applies a mode-filtering approach to further reduce the bandwidth and cycles and share the buffer of IME and FME. The final ME implementation with 0.13-mum process can support processing of 1080 p @ 60 fps with just 128.8 MHz, 282.6 K gates, and 8.54-KB buffer, which saves 60% gate count, and 68.9% SRAM buffers when compared with the previous design.

Published in:

IEEE Transactions on Circuits and Systems I: Regular Papers  (Volume:55 ,  Issue: 6 )