• Title/Summary/Keyword: DCT/IDCT 구조

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A Low-Power 2-D DCT/IDCT Architecture through Dynamic Control of Data Driven and Fine-Grain Partitioned Bit-Slices (데이터에 의한 구동과 세분화된 비트-슬라이스의 동적제어를 통한 저전력 2-D DCT/IDCT 구조)

  • Kim Kyeounsoo;Ryu Dae-Hyun
    • Journal of Korea Multimedia Society
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    • v.8 no.2
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    • pp.201-210
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    • 2005
  • This paper proposes a power efficient 2-dimensional DCT/IDCT architecture driven by input data to be processed. The architecture achieves low power by taking advantage of the typically large fraction of zero and small-valued input processing data in video and image data compression. In particular, it skips multiplication by zero and dynamically activates/deactivates required bit-slices of fine-grain bit partitioned adders within multipliers and accumulators using simple input ANDing and bit-slice MASKing. The processed results from 1-D DCT/IDCT do not have unnecessary sign extension bits (SEBs), which are used for further power reduction in matrix transposer. The results extracted by bit-level transition activity simulations indicate significant power reduction compared to conventional designs.

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