Fast 16-bit fixed-point 8x8 IDCT approximations

被引：0

作者：

Liu, Lijie ^{[1
]}

Tran, Trac D. ^{[1
]}

Topiwala, Pankaj ^{[2
]}

机构：

[1] Johns Hopkins Univ, Dept Elect & Comp Engn, Baltimore, MD 21218 USA

[2] LLC, FastVDO, Columbia, MD 21046 USA

来源：

2006 FORTIETH ASILOMAR CONFERENCE ON SIGNALS, SYSTEMS AND COMPUTERS, VOLS 1-5 | 2006年

关键词：

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, we propose two 16-bit fixed-point IDCT schemes, i.e., the rotation-based approximation and the lifting-based approximation. Both schemes can pass IEEE1180 tests and maintain satisfactory compatibility with the floating-point IDCT. The structures of these two schemes are derived from Loeffler's plane rotation-based factorization of the IDCT matrix. Coefficients in the structures are approximated carefully by dyadic rationales, leading to the fast multiplierless implementation. The drifting performance in H.263+, MPEG-2 and MPEG-4 is also demonstrated.

引用

页码：989 / +

页数：2

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