DocumentCode :
1642997
Title :
Subpixel accuracy in motion estimation for video coding
Author :
Bellifemine, F. ; Celidonio, M. ; Chimienti, A. ; Marcone, G. ; Picco, R.
Author_Institution :
Centro Studi per la Televisione, CNR Torino, Italy
fYear :
1992
fDate :
9/11/1992 12:00:00 AM
Firstpage :
105
Lastpage :
110
Abstract :
The aim is analysis of estimation accuracy for use in hybrid DCT coding schemes. The traditional block-matching algorithm has been generalized in order to take into account displacements of subpixel accuracy: 1, 1/2 and 1/4 pixel accuracies and different interpolation functions have been tested. The prediction error energy has been used to evaluate the performance of the estimation process. The problem has also been approached from the rate distortion theory point of view and the total performance tested considering also the increase in overheads for transmission of the motion vectors. An attempt to overcome the computational complexity of subpixel accuracies has been made. Results have been obtained by simulating a hybrid coder for constant quality coding
Keywords :
computational complexity; discrete cosine transforms; filtering and prediction theory; high definition television; image coding; interpolation; motion estimation; video signals; block-matching algorithm; computational complexity; estimation accuracy; hybrid DCT coding schemes; interpolation functions; motion estimation; performance; prediction error energy; rate distortion theory; subpixel accuracy; video coding; Digital TV; Encoding; Entropy; HDTV; Image coding; Motion estimation; Quantization; Rate distortion theory; Testing; Video coding;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications and Signal Processing, 1992. COMSIG '92., Proceedings of the 1992 South African Symposium on
Conference_Location :
Cape Town
Print_ISBN :
0-7803-0807-7
Type :
conf
DOI :
10.1109/COMSIG.1992.274303
Filename :
274303
Link To Document :
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