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