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| Design of Multi-standard Discrete Cosine Transform Based on Coarse-grained Reconfigurable Array |
| Chen Rui①② Yang Hai-gang① Wang Fei① Jia Rui①② Yu Wei①② |
①(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)
②(University of Chinese Academy of Sciences, Beijing 100190, China) |
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Abstract Discrete Cosine Transform (DCT) plays an important role in the codec process of video signals, and has a significant influence on the compression efficiency and quality. In this paper, a Coarse-Grained Reconfigurable Array (CGRA) based hardware architecture is proposed for 8-point 2D DCT. Through the reconfiguration of coarse-grained reconfigurable array, the proposed architecture is capable of supporting 8×8 2D discrete cosine transform of the multiple video compression coding standards in a single platform. The experimental results show that the proposed architecture is able to parallel process 8 pixels in a cycle, and the throughput achieves up to 1.157×109 pixels per second. The design efficiency and power efficiency is about 4.33 times and 12.3 times higher than existing works respectively. Moreover, the proposed architecture can support real-time decoding of 4096×2048 at 30 fps (4:2:0) video sequences.
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Received: 15 January 2014
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Corresponding Authors:
Yang Hai-gang
E-mail: yanghg@mail.ie.ac.cn
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2015, Vol. 37 
