An Improved Scaled DCT Architecture

作者：Wu Zhigang^*; Sha Jin; Wang Zhongfeng; Li Li; Gao Minglun

来源：IEEE Transactions on Consumer Electronics, 2009, 55(2): 685-689.

DOI：10.1109/tce.2009.5174440

• DCT
• Scaled DCT
• CORDIC algorithm

This paper presents an efficient architecture for computing the eight-point 1-D scaled DCT (Discrete Cosine Transform) with a new algorithm based on a selected Loeffler DCT scheme whose multiplications are placed in the last stage. The proposed DCT architecture does not require any scaling compensation in the computation. Furthermore, a multiplication approximation method is developed, which is, more efficient than traditional CORDIC (Coordinate Rotation Digital Computer) -based algorithms. Compared to the latest work [8], the proposed approach can save 14% addition operations for the same precision requirement and the path delay can be significantly reduced as well.(1)

• 出版日期2009-5
• 单位南京大学