Pipelined implementation of AI-based Loeffler DCT

IEICE Electronics Express

Hyeong-cheol Oh²  Yong-luo Shen¹ 

[1] College of Info. Sci., Guangdong Univ. of Business Studies;College of Sci. and Tech, Korea Univ.

关键词: discrete cosine transform;    two-dimensional algebraic integer encoding;    Loeffler algorithm;   

DOI  :  10.1587/elex.10.20130319

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(8)Cited-By(1)We propose a pipelined implementation of the eight-point Loeffler discrete cosine transform (DCT) for portable applications. The pipelined structure produces one DCT coefficient per clock cycle, which meets the limited memory bandwidth of many portable devices. Two-dimensional algebraic integer (AI) encoding and the shift-and-add approach were used to make the implementation multiplication-free. A hardware cost reduction of approximately 40% was achieved by trading off the precision of the adders against a negligible amount of error in the reconstructed images.

【 授权许可】

Unknown