Adaptive Sub-Sampling Based Reconfigurable SAD Tree Architecture for HDTV Application
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- HUANG Yiqing
- IPS, Waseda University
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- LIU Qin
- IPS, Waseda University
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- GOTO Satoshi
- IPS, Waseda University
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- IKENAGA Takeshi
- IPS, Waseda University
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抄録
This paper presents a reconfigurable SAD Tree (RSADT) architecture based on adaptive sub-sampling algorithm for HDTV application. Firstly, to obtain the the feature of HDTV picture, pixel difference analysis is applied on each macroblock (MB). Three hardware friendly sub-sampling patterns are selected adaptively to release complexity of homogeneous MB and keep video quality for texture MB. Secondly, since two pipeline stages are inserted, the whole clock speed of RSADT structure is enhanced. Thirdly, to solve data reuse and hardware utilization problem of adaptive algorithm, the RSADT structure adopts pixel data organization in both memory and architecture level, which leads to full data reuse and hardware utilization. Additionally, a cross reuse structure is proposed to efficiently generate 16 pixel scaled configurable SAD (sum of absolute difference). Experimental results show that, our RSADT architecture can averagely save 61.71% processing cycles for integer motion estimation engine and accomplish twice or four times processing capability for homogeneous MBs. The maximum clock frequency of our design is 208MHz under TSMC 0.18µm technology in worst work conditions(1.62V, 125°C). Furthermore, the proposed algorithm and reconfigurable structure are favorable to power aware real-time encoding system.
収録刊行物
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- IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
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IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E92-A (11), 2819-2829, 2009
一般社団法人 電子情報通信学会
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詳細情報 詳細情報について
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- CRID
- 1390282681286782208
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- NII論文ID
- 10026860909
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- NII書誌ID
- AA10826239
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- ISSN
- 17451337
- 09168508
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可