Title :
A new error criterion for block based motion estimation
Author :
Fuldseth, Arild ; Ramstad, Tor A.
Author_Institution :
Dept. of Telecommun., Norwegian Inst. of Technol., Trondheim, Norway
Abstract :
A new error criterion for block based motion estimation in a hybrid video coder is proposed. Traditionally, the mean squared error between the current and the previous frames has been considered as an appropriate criterion for selecting the displacement vectors in hybrid video coders. It is shown that when the spatial domain coder is based on a DCT and dynamic bit allocation, improved performance can be achieved by using the geometric mean of the DCT coefficient variances as the error criterion. The proposed coder offers a significant gain in terms of PSNR, typically in the range of 0.2-1.0 dB, without much increase in the computational complexity
Keywords :
coding errors; discrete cosine transforms; error statistics; image sequences; motion compensation; motion estimation; transform coding; video coding; DCT coefficient variances; PSNR; block based motion estimation; computational complexity; displacement vectors; dynamic bit allocation; error criterion; geometric mean; hybrid video coder; image frames; mean squared error; motion compensation; performance; spatial domain code; video sequence coding; Bit rate; Computational complexity; Design for disassembly; Discrete cosine transforms; Filter bank; Motion compensation; Motion estimation; PSNR; Redundancy; Video sequences;
Conference_Titel :
Image Processing, 1995. Proceedings., International Conference on
Conference_Location :
Washington, DC
Print_ISBN :
0-8186-7310-9
DOI :
10.1109/ICIP.1995.537612
