Title :
Hybrid fractal/DCT coding of video
Author :
De Faria, Sérgio M M ; Ghanbari, M.
Author_Institution :
Essex Univ., Colchester, UK
Abstract :
We introduce two techniques that can be used together to improve video coding performance. Firstly, block matching motion estimation with spatial transformation (BMST) is used to increase the motion compression efficiency, and then the motion compensated prediction (MCP) errors are encoded using a hybrid fractal/DCT scheme. The MCP error blocks are classified according to their energy content and they should be coded with a low bit rate. Many of them can be DCT coded, but for those which require a large bit rate to achieve a certain quality, fractal coding can be efficiently used considering the bit rate constraint. This hybrid scheme speeds up the decoding process, reduces the bit rate, and due the efficiency of the motion compensation only a few MCP error images are coded
Keywords :
discrete cosine transforms; fractals; image classification; image matching; motion compensation; motion estimation; prediction theory; transform coding; video coding; DCT coded; bit rate constraint; bit rate reduction; block matching motion estimation; energy content; fractal coding; hybrid fractal/DCT coding; low bit rate coding; motion compensated prediction errors; motion compression efficiency; spatial transformation; video coding;
Conference_Titel :
Image Processing and its Applications, 1995., Fifth International Conference on
Conference_Location :
Edinburgh
Print_ISBN :
0-85296-642-3
DOI :
10.1049/cp:19950673
