Low bitrate video coding with depth compensation

Author

van Schalkwyk, J.J.D. ; Venter, M.A.H.

Author_Institution

Dept. of Electr. & Electron. Eng., Pretoria Univ., South Africa

Volume

141

Issue

3

fYear

1994

fDate

6/1/1994 12:00:00 AM

Firstpage

149

Lastpage

153

Abstract

A depth-compensated low bitrate hybrid video coder for videophone applications is described. Depth and associated position information is extracted from the video frames using an edge-based stereo algorithm. A global motion vector and scale factor are extracted from the depth map and used as parameters for a model of the moving object. These global parameters are used to make the motion-compensated prediction more effective, by compensating for the change in size of the object. Simulations show that the compensated coder results in coded sequences with SNRs up to 1 dB better than those coded with conventional hybrid coders, at a coding rate of 64 kbit/s

Keywords

codecs; edge detection; image coding; image sequences; motion estimation; video equipment; video signals; videotelephony; 64 kbit/s; SNR; coded sequences; coding rate; depth compensation; depth information; depth map; edge-based stereo algorithm; global motion vector; global parameters; low bitrate hybrid video coder; motion-compensated prediction; moving object; position information; scale factor; simulations; video coding; video frames;

fLanguage

English

Journal_Title

Vision, Image and Signal Processing, IEE Proceedings -

Publisher

iet

ISSN

1350-245X

Type

jour

DOI

10.1049/ip-vis:19941056

Filename

296571