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Technical Program
Paper Detail
| Paper: | WP-P3.1 |
| Session: | Image and Video Coding - II |
| Time: | Wednesday, October 11, 14:20 - 17:00 |
| Presentation: |
Poster
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| Title: |
A FAST ALGORITHM FOR CONVERSION FROM DCT BLOCKS TO INTEGER COSINE TRANSFORM BLOCKS |
| Authors: |
Zhihua He; Boston University | | | | | Maja Bystrom; Boston University | | |
| Abstract: |
Variants of the discrete cosine transform (DCT) have been selected for different image/video compression standards, and fast conversion algorithms between these transforms are needed. In this paper, conversion between an 8X8 DCT block, used in MPEG-2, and its corresponding 4X4 integer DCT blocks, used in H.264, is studied. By investigating the structure of the two transform kernels, a DCT decomposition scheme is adopted in development of the fast conversion algorithm. Analysis of the performance of this conversion scheme shows that the proposed scheme provides over 45% computation savings on multiplications, as compared to an existing scheme, while maintaining high fidelity in terms of PSNR. |
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