Error control for receiver-driven layered multicast of audio and video | IEEE Journals & Magazine | IEEE Xplore

Error control for receiver-driven layered multicast of audio and video


Abstract:

We consider the problem of error control for receiver-driven layered multicast of audio and video over the Internet. The sender injects into the network multiple source l...Show More

Abstract:

We consider the problem of error control for receiver-driven layered multicast of audio and video over the Internet. The sender injects into the network multiple source layers and multiple channel coding (parity) layers, some of which are delayed relative to the source, Each receiver subscribes to the number of source layers and the number of parity layers that optimizes the receiver's quality for its available bandwidth and packet loss probability. We augment this layered FEC system with layered pseudo-ARQ. Although feedback is normally problematic in broadcast situations, ARQ can be simulated by having the receivers subscribe and unsubscribe to the delayed parity layers to receive missing information. This pseudo-ARQ scheme avoids an implosion of repeat requests at the sender and is scalable to an unlimited number of receivers, We show gains of 4-18 dB on channels with 20% loss over systems without error control and additional gains of 1-13 dB when FEC is augmented by pseudo-ARQ in a hybrid system, Optimal error control in the hybrid system is achieved by an optimal policy for a Markov decision process.
Published in: IEEE Transactions on Multimedia ( Volume: 3, Issue: 1, March 2001)
Page(s): 108 - 122
Date of Publication: 07 August 2002

ISSN Information:


I. Introduction

This paper addresses the problem of error control for receiver-driven layered multicast. The application scenario is that of broadcasting live or prestored audio and video over the Internet to potentially millions of simultaneous receivers. This problem is important to address as the Internet moves to augment or supplant existing radio and television distribution systems and as it begins to provide a broadcast infrastructure for new smaller markets, such as the distance learning market.

References

References is not available for this document.