A perceptually-based motion compensated video encoder

Author

Ansari, A.C.

Author_Institution

Center for Comput. Aids for Ind. Productivity, Rutgers Univ., Piscataway, NJ, USA

fYear

1992

fDate

30 Aug-3 Sep 1992

Firstpage

25

Lastpage

28

Abstract

A perceptually based video encoder for monochrome image sequences is presented. It incorporates characteristics of the human visual system to detect, track, and encode image blocks (of 8×8 pixels) perceived to be in apparent motion. The Weber relation in the spatio-temporal domain is used for motion detection. A decimation-interpolation scheme is developed to produce good quality video at very low-bit-rates. An efficient technique based on the discrete cosine transform and vector quantization is developed to encode image blocks which have changed beyond a perceptual threshold. The new encoder is demonstrated to yield competitive quality video at low-bit-rates

Keywords

discrete cosine transforms; image coding; image sequences; vector quantisation; video signals; 64 pixels; 64 to 128 kbit/s; 8 pixels; Weber relation; apparent motion; decimation-interpolation scheme; discrete cosine transform; image coding; monochrome image sequences; motion detection; perceptually-based motion compensated video encoder; spatio-temporal domain; vector quantization; very low-bit-rates; Computed tomography; Computer industry; Discrete cosine transforms; Humans; Image coding; Image sequences; Image storage; Motion detection; Productivity; Visual system;

fLanguage

English

Publisher

ieee

Conference_Titel

Pattern Recognition, 1992. Vol.III. Conference C: Image, Speech and Signal Analysis, Proceedings., 11th IAPR International Conference on

Conference_Location

The Hague

Print_ISBN

0-8186-2920-7

Type

conf

DOI

10.1109/ICPR.1992.201919

Filename

201919