| Paper: | MP-P4.10 |
| Session: | Image Coding I |
| Time: | Monday, September 17, 14:30 - 17:10 |
| Presentation: |
Poster
|
| Title: |
ENHANCED QUALITY SCALABILITY FOR JPEG2000 CODE-STREAMS BY THE CHARACTERIZATION OF THE RATE-DISTORTION SLOPE |
| Authors: |
Francesc Auli-Llinas; Universitat Autonoma de Barcelona | | |
| | Joan Serra-Sagrista; Universitat Autonoma de Barcelona | | |
| | Joan Bartrina-Rapesta; Universitat Autonoma de Barcelona | | |
| | Jose Lino Monteagudo-Pereira; Universitat Autonoma de Barcelona | | |
| Abstract: |
Quality scalability is fundamental in JPEG2000, achieved through the use of quality layers. Two points, related with quality layers, need to be addressed: 1) lack of quality scalability of single quality layer code-streams, and 2) non rate-distortion optimality of windows of interest transmission. This paper introduces a rate control method that can be applied to already encoded code-streams, addressing these points. Its main key-feature is a characterization that estimates the rate-distortion slope of coding passes without using measures based on the original image. Experimental results suggest that this method supplies quality scalability achieving near-optimal results. Its low computational costs makes it suitable for use in interactive transmissions. |
