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Shape-adaptive DCT with block-based DC separation and ΔDC correction

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2 Author(s)
Kauff, P. ; Dept. of Process., Heinrich-Hertz-Inst. for Commun. Technol., Berlin, Germany ; Schuur, K.

This paper refers to a shape-adaptive DCT algorithm (SA-DCT) originally proposed by Sikora and Makai (see ibid., vol.5, p.59-62, 1995). The SA-DCT has been developed in the framework of the ongoing MPEG-4 standardization phase of ISO/IEC, and has been included in the video verification model of MPEG-4. In this context, the focus of the paper is to emphasize a systematic performance limitation of conventional SA-DCT, and to propose an extended version (ΔDC-SA-DCT) which avoids this restriction in general. This modification considerably improves the efficiency of SA-DCT, and can easily be implemented in existing SA-DCT tools

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Circuits and Systems for Video Technology, IEEE Transactions on  (Volume:8 ,  Issue: 3 )