四维矩阵离散余弦变换的整数实现

吉林大学学报(工学版)

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Integer implementation of four-dimensional matrix DCT

Zhao Zhi-jie^1,2;Chen He-xin¹;Chen Mian-shu¹

1.College of Communication Engineering, Jilin University, Changchun 130022, China； 2.College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061, China

Received:2007-02-03 Revised:2007-04-12 Online:2008-05-01 Published:2008-05-01

Abstract

Abstract: According to the definition of 4D matrix DCT, the transfer core matrix can be considered as twodimensional unitary matrix. Float 4DMDCT inversible factorization was conducted and integer to integer inversible transform metrix was obtained. Then this implementation of 4DMDCT was applied to video sequnces and the integer trasform coefficients were quantized by the vector quantizer based on robust statistics. Experiment results indicate that the PSNR of the reconstructed image through this scheme improves more than 1dB than that of the reconstructed image of float scheme and the subject quality of the image is also improved.

Key words: information processing technology, integer mapping, four-dimensional matrix, matrix factorization, video compression

CLC Number:

TN911.73

Zhao Zhi-jie;Chen He-xin;Chen Mian-shu . Integer implementation of four-dimensional matrix DCT[J].吉林大学学报(工学版), 2008, 38(03): 700-0703.

References

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