By Topic

Very low bit rate video coding using H.263 coder

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Ngan, K.N. ; Dept. of Electr. & Electron. Eng., Western Australia Univ., Nedlands, WA, Australia ; Chai, D. ; Millin, A.

Recently, ITU-T established a draft standard, H.263 to he used as a possible standard for very low bit rate video coding at less than 64 kb/s. It is based on the ITU-T H.261 standard for videoconferencing. This paper provides an analysis of the performance of H.263 coder with the aim of establishing its operational parameters and limitations when operating at very low bit rates. Its performance is then optimized by selecting the desired set of operational parameters. The H.263 coder suffers from “blocking” effects when operating at very low bit rates. To improve the subjective quality of the coded images, the discrete cosine transform (DCT) coefficients are weighted using a visual quantization matrix before quantization. Simulation results showed that the proposed method increases the peak signal-to-noise ratio (PSNR) values at all bit rates tested, but more importantly, the perceived visual quality is improved significantly by reducing the annoying “blocking” effects

Published in:

Circuits and Systems for Video Technology, IEEE Transactions on  (Volume:6 ,  Issue: 3 )