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Prediction mode reordering and IDCT direction control for fast intra 8×8 prediction

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3 Author(s)
Tae Sung Kim ; Dept. of Electr. Eng., Seoul Nat. Univ., Seoul, South Korea ; Chae Eun Rhee ; Hyuk-Jae Lee

This paper presents a novel architecture of intra 8×8 prediction for a high profile H.264 intra frame encoder. Intra 8×8 prediction consists of prediction and reconstruction phases and two phases are performed in a pipeline manner. In the 2-stage pipelined schedule, bubbles between prediction and reconstruction phases are the main bottleneck for fast 8×8 prediction. To reduce bubbles, prediction mode reordering and Inverse Discrete Cosine Transform (IDCT) direction control schemes are proposed. The proposed schemes reduce 115 cycles of bubbles to perform intra 8×8 prediction for a macroblock and achieve a 24.5% speed-up.

Published in:

2011 IEEE 54th International Midwest Symposium on Circuits and Systems (MWSCAS)

Date of Conference:

7-10 Aug. 2011