Internet distributed image information system

A new IP multimedia distributed system is presented. The two main functiona lities are error-resilience for image and video transmission and storage an d distribution of partial information among several servers in order to use different Internet routes. The system is based on a redundant transform ca lled the Mojette transform that projects the original information into diff erent pieces. Our group has developed this transform for the last five year s. The main theoretical results of the Mojette transform are recalled for t he 2-D and 3-D cases. The transform is then used to break a data volume int o several pieces and to transmit or store them with several levels of redun dancy such that a receiver is able to reconstruct the original message by a subset of pieces despite erasures. The second main feature is to provide i nsufficient pieces onto a single server to avoid a network information thef t whereas being able to use the redundancy located on other servers to rebu ild the information after the network destruction of a server. The characte ristics of this distributed system are exemplified. The relationships with duality of service and multiple description theory are analyzed and exempli fied with the telemedecine case. Finally, a multiple description scheme wit h prioritized flows is defined and implemented. The Mojette operators and t he resultant multimedia distributed architecture is valid both for any mult imedia signals (image, video, voice) to be encoded and those already encode d and available as bit streams.