Direct transform to transform computation

被引：21

作者：

Skodras, AN ^{[1
]}

机构：

[1] Univ Patras, Elect Lab, GR-26110 Patras, Greece

来源：

IEEE SIGNAL PROCESSING LETTERS | 1999年 / 6卷 / 08期

关键词：

compressed-domain processing; discrete cosine transform; downscaling; JPEG; MPEG; transcoding;

D O I：

10.1109/97.774865

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：

An efficient direct method for the computation of a length-N discrete cosine transform (DCT) given two adjacent length-(N/2) DCT coefficients, is presented in this letter. The computational complexity of the proposed method is lower than the traditional approach for lengths N > 8. Savings of N memory locations and 2N data transfers are also achieved.

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收藏

页码：202 / 204

页数：3

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