Title :
Shape-adaptive DCT with block-based DC separation and ΔDC correction
Author :
Kauff, Peter ; Schuur, Klaas
Author_Institution :
Dept. of Process., Heinrich-Hertz-Inst. for Commun. Technol., Berlin, Germany
fDate :
6/1/1998 12:00:00 AM
Abstract :
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
Keywords :
adaptive signal processing; code standards; coding errors; discrete cosine transforms; error correction codes; image segmentation; standardisation; telecommunication standards; transform coding; video coding; ΔDC correction; ΔDC-SA-DCT; MPEG-4; MPEG-4 standardization; block-based DC separation; performance limitation; segmented video; shape-adaptive DCT algorithm; video coding; video verification model; Discrete cosine transforms; IEC standards; ISO standards; Image coding; Image segmentation; MPEG 4 Standard; Noise shaping; Quantization; Shape; Video coding;
Journal_Title :
Circuits and Systems for Video Technology, IEEE Transactions on
