ICIP 2006, Atlanta, GA
 

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Paper Detail

Paper:WP-P3.1
Session:Image and Video Coding - II
Time:Wednesday, October 11, 14:20 - 17:00
Presentation: Poster
Topic: Image & Video Coding: Transcoding
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.