A unified algorithm for subband-based discrete cosine transform

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题名:	A unified algorithm for subband-based discrete cosine transform
作者:	陳竹一;Shieh, Yaw-Shih;Hsin, Hsi-Chin;Chen, Jwu-E.;Ko, Lu-Ting;Sung, Tze-Yun
贡献者:	資訊電機學院電機工程學系
日期:	2012-01-01
上传时间:	2026-04-23 13:24:17 (UTC+8)
出版者:	Hindawi Publishing Corporation;Cairo, Egypt: Hindawi Limiteds
摘要:	摘要： Discrete cosine transform (DCT) and inverse DCT (IDCT) have been widely used in many image processing systems and real-time computation of nonlinear time series. In this paper, the unified DCT/IDCT algorithm based on the subband decompositions of a signal is proposed. It is derived from the data flow of subband decompositions with factorized coefficient matrices in a recursive manner. The proposed algorithm only requires (4(log2n)−1−1) and (4(log2n)−1−1)/3 multiplication time for n-point DCT and IDCT, with a single multiplier and a single processor, respectively. Moreover, the peak signal-to-noise ratio (PSNR) of the proposed algorithm outperforms the conventional DCT/IDCT. As a result, the subband-based approach to DCT/IDCT is preferable to the conventional approach in terms of computational complexity and system performance. The proposed reconfigurable architecture of linear array DCT/IDCT processor has been implemented by FPGA. 出版者： Cairo, Egypt: Hindawi Limiteds 出版日期： 2012-01-01 出處： Mathematical Problems in Engineering, 2012-01, Vol.2012 (2012), p.888-918 資源來源： Chinese Electronic Periodical Services (CEPS) 版權： Copyright © 2012 Lu-Ting Ko et al. 識別號： ISSN: 1024-123X 識別號： ISSN: 1026-7077 識別號： ISSN: 1563-5147 識別號： EISSN: 1563-5147 識別號： DOI: 10.1155/2012/912194
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