Rate buffered fractal video

Author

Wilson, D.L. ; Nicholls, J.A. ; Monro, D.M.

Author_Institution

Sch. of Electron. & Electr. Eng., Bath Univ., UK

Volume

v

fYear

1994

fDate

19-22 Apr 1994

Abstract

We report real time fractal coding of 176 by 144 luminance images on a 33 MHz i-486 computer. With a zero searching first order (bilinear) Bath fractal transform, square blocks of 64 pixels are coded in 250 μsec and decoded in 200 μsec. This permits coding of 40% of each frame in a 25 Hz video sequence, or full coding at 10 Hz. By transmitting only those blocks of greatest error, we can obtain any degree of data compression. Useful video sequences of talking heads have been achieved with rates as low as 40 kbits/sec. We describe the techniques used, give illustrations of the degradation, and show the evolution of the errors in the decoded sequence as various events occur. The overall compression at 40 kbits/sec is 99:1, with further error reductions possible

Keywords

block codes; data compression; decoding; fractals; image sequences; transform coding; video coding; 10 Hz; 25 Hz; 33 MHz; 40 kbit/s; 64 pixel; Bath fractal transform; bilinear transform; block coding; data compression; decoded sequence; errors; luminance images; rate buffered fractal video; real time fractal coding; talking heads; video sequence; Data compression; Decoding; Equations; Fractals; Head; Image coding; Least squares approximation; Least squares methods; Tiles; Video sequences;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1994. ICASSP-94., 1994 IEEE International Conference on

Conference_Location

Adelaide, SA

ISSN

1520-6149

Print_ISBN

0-7803-1775-0

Type

conf

DOI

10.1109/ICASSP.1994.389460

Filename

389460