Scalable Streaming of JPEG 2000
The JPEG 2000 image coding standard provides excellent compression performance in comparison to earlier image coding standards, and also provides a scalable representation of the coded image or image sequence. With the scalable representation, different spatial-temporal resolutions, levels of quality, and Region-of-Interests (ROIs) may be easily accessed or streamed in a progressive manner. In this project, we consider technology to enable progressive streaming of images and images sequences according to ROI information considering display and bandwidth limitations.
Background & Objective: Smart surveillance systems will require the latest techniques most efficient storage and transmission of images. Many new systems employ JPEG 2000 for image compression processing to gain a better understanding of objects in a scene. To satisfy bandwidth constraints and display important parts of the images fast and precisely, the compressed images are efficiently transcoded in the compressed-domain based on the ROI information.
Technical Discussion: In our system, an image sequence is encoded and stored as a JPEG 2000 bitstream, and then the stored images are efficiently transcoded in the compressed-domain, to reorder the image stream and achieve a wide range of effects and progressions. In one effect the regions of interest (ROIs) are preserved while higher quality portions of the background are replaced with empty packets to satisfy network constraints. We have designed a dynamic rate control algorithm that achieves high bandwidth utilization, hence better overall quality, while minimizing the quality variations over time. Another technique allows the order of transmission to differ from the ordering of the stream, thereby achieving flexible progressive transmission. Other possible effects include resolution reduction, component reduction and cropping functions.
Future Direction: We are considering additional scalable progressive transmission techniques.
Contacts:
Derek Schwenke
Anthony Vetro
Publications:
Schwenke, D.; Vetro, A.; Hata, T, "Server-Driven Progressive Image Transmission of JPEG 2000", SPIE Conference on Visual Communications and Image Processing (VCIP), Vol. 6822, January 2008 (SPIE Publications, TR2008-005)
| Technical Reports: | |
| Surveillance System with Object-Aware Video Transcoder | |
| Fast Region-of-Interest Transcoding for JPEG 2000 Images | |
Technology Areas:
Multimedia
Digital Video
Modification Date: July 3, 2007
