Statistical multiplexing of distributed video streams

Nesrine Changuel (1) , Bessem Sayadi (1) , Michel Kieffer (2, 3)

1 Alcatel Lucent Bell Labs
2 L2S - Laboratoire des signaux et systèmes
3 LTCI - Laboratoire Traitement et Communication de l'Information

We consider a media aware network element (MANE) fed by several remote video servers. The role of the MANE is to bufferize the encoded video contents and to build a multiplex containing all video programs to be broadcasted or multicasted over a wireless link. We design a decentralized control technique able to satisfy some video quality fairness constraint among programs. Unlike most statistical multiplexing systems, our scheme is partly decentralized. The bandwidth allocation among programs is centralized and done within the MANE, but takes into account the quality fairness constraint. Each video server is controlled independently from the others, requiring no exchange between servers. The MANE feds back to each video server the level of its associated buffer to help the remote video servers to adapt their rate-distorsion trade-off so that the buffer reaches some reference level. Experimental results show that in the case of Gaussian sources, compressed and delivered to the MANE, an equilibrium is reached, and that the fairness constraint is satisfied.

Domaines: Multimédia [cs.MM]; Réseaux et télécommunications [cs.NI]

Nesrine Changuel, Bessem Sayadi, Michel Kieffer. Statistical multiplexing of distributed video streams. GRETSI 2011, Sep 2011, Bordeaux, France. pp.1-4. ⟨hal-00614577⟩