International Journal of Applied Science and Engineering
Published by Chaoyang University of Technology

Cheng-Hsiung Hsieh1, Chen-Wei Fu and Wei-Lung Hung

Department of Computer Science and Information Engineering Chaoyang University of Technology, Wufong, Taichung County 41349, Taiwan, R.O.C.

 

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ABSTRACT

This paper presents a simple but effective approach to improve the performance of MPEG-2. This study is motivated by (i) the energy compaction property in DCT and (ii) the property of human visual system. Both (i) and (ii) indicate that low-frequency coefficients are more important than others in the DCT transformed blocks. Moreover, the quantized transformed coefficients in high-frequency region are zero or approximate zero in general. Those coefficients contribute nothing or little to PSNR and may waste some bit rate in the MPEG-2. Therefore, the zonal coding scheme is applied to the MPEG-2 where some high-frequency coefficients are discarded. The proposed approach is called zonal MPEG-2 which is totally compatible with the traditional MPEG-2. The zonal MPEG-2 is verified by examples and shown to be able to significantly reduce the bit rate with acceptable perceptual quality degradation when compared with the traditional MPEG-2.


Keywords: Zonal Coding; MPEG-2; Bit RateReduction.


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REFERENCES

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ARTICLE INFORMATION



Accepted: 2007-10-30
Available Online: 2007-12-01


Cite this article:

Hsieh, C.-H., Fu, C.-W., Hung, W.-L. 2007. Zonal MPEG-2. International Journal of Applied Science and Engineering, 5, 159–171. https://doi.org/10.6703/IJASE.2007.5(2).151

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