Picture archiving and communication systems (PACS) have to handle a lot of moving or still images services with different resolution levels (HDTV-like, TV-like and lower resolutions), quality requirements (from acceptable visual quality to lossless) and different priorities. In this paper we present a new system for the integration of hierarchical images transmission in a broadband network based on the DQDB protocol (IEEE 802.6 standard). This system is based on the combination of two new tools. First we have designed a multiresolution/multiquality image coding scheme based on wavelet transforms. The main original feature of the algorithm is that it allows a multiresolution lossless access to images. A greater compression ration is possible at the price of graceful degradations. Secondly, we have implemented an improved priority mechanism in the DQDB protocol. The aim was that, in case of network overload, the emissions lose quality but are always maintained. A simulation of the implementation of such a system for the handling of the communications inside a hospital is also presented.

Date Published: 29 October 1993
PDF: 11 pages
Proc. SPIE 1977, Video Communications and PACS for Medical Applications, (29 October 1993); doi: 10.1117/12.160495

Published in SPIE Proceedings Vol. 1977:
Video Communications and PACS for Medical Applications
Rudy A. Mattheus; Andre J. Duerinckx; Peter J. van Otterloo, Editor(s)