Distributed and compressed multimedia transmission using a discrete backprojection operator

Pierre Verbert; Jeanpierre V. Guedon; Benoit Parrein

doi:10.1117/12.473047

1 July 2002 Distributed and compressed multimedia transmission using a discrete backprojection operator

Pierre Verbert, Jeanpierre V. Guedon, Benoit Parrein

Proceedings Volume 4862, Internet Multimedia Management Systems III; (2002) https://doi.org/10.1117/12.473047
Event: ITCom 2002: The Convergence of Information Technologies and Communications, 2002, Boston, MA, United States

Abstract

To meet QoS for multimedia transmission over packet-lossy network such as IP networks, two ways can be followed, either the source scalability is extended to packets, or multiple description schemes are used. In this case, equivalence between packets is assumed and forward error correction is needed. In this paper the proposed solution allows multiple description of a scalable bitstream source using a backprojection operator. This operator belongs to the class of the Mojette transforms, already presented in ITCom2001. In this scheme a redundant projections set is firstly computed for different angles. In a second step only few projections are selected to check the reconstructibility (quantization step). Third an entropic coding on remaining projections is applied. The Mojette transform is an exact discrete Radon transform generating bins from ixels (information elements) computed as XOR or standard additions. This transform is linear (in number of pixels and number of projections) both for coding and decoding. In this new scheme we propose, sub flows (when assuming source scalability) issued from the application output bitstreams are mapped into buffers. The projections issued from these buffers meet both the compression of the bitstreams and the multiple descriptions constraints.

Citation Download Citation

Pierre Verbert, Jeanpierre V. Guedon, and Benoit Parrein "Distributed and compressed multimedia transmission using a discrete backprojection operator", Proc. SPIE 4862, Internet Multimedia Management Systems III, (1 July 2002); https://doi.org/10.1117/12.473047

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