BroadCatch: A Periodic Broadcast Technique for Heterogeneous Video-on-Demand

Scalable on-demand media streaming for heterogeneous clients

“…Our work uses this protocol as a building block because: 1) unlike other protocols, it can support any client reception bandwidth, even reception bandwidths that are less than twice the playback rate; and 2) it can be extended to support efficient packet loss recovery. Sections 2.2 and 2.3 review two recent proposals for supporting heterogeneous client bandwidths using periodic broadcast, the BroadCatch [Tantaoui et al 2004] and the Heterogeneous Receiver-Oriented Broadcasting (HeRO) [Hua et al 2003] protocols, respectively. Section 2.4 reviews work on quality adaptation for unicast streaming and discusses the difficulties that arise when applying similar approaches for multicast streaming.…”

“…The BroadCatch protocol divides a media file into 2 K −1 equal-sized segments, with a contiguous group of these segments being transmitted at playback rate (i.e., r = 1) on K separate channels [Tantaoui et al 2004]. The first two channels cyclically broadcast the entire media file, with the beginning of the transmission on the second channel offset by L/2 time units (where L is the media playback duration) with respect to the beginning of the transmission on the first channel.…”

“…All previous periodic broadcast protocols, with the exception of the recently proposed Heterogeneous Receiver-Oriented Broadcasting (HeRO) [Hua et al 2003] and BroadCatch [Tantaoui et al 2004] protocols that we discuss later in the article, assume that all clients can receive media streams at the same non-time-varying rate. This homogeneous client bandwidth assumption is unlikely to hold for delivery in the Internet.…”

Workload-Aware Resource Sharing and Cache Management for Scalable Video Streaming

“…Two resource sharing paradigms dominate scalable video streaming; stream merging [21,5,11,29,3,27,28] and periodic broadcasting [14,20,22,24,23,2,33,32]. Stream merging techniques combine streams when possible to reduce the delivery costs.…”

Towards scalable delivery of video streams to heterogeneous receivers

“…One notable exception is Bandwidth Skimming [10], which may require client bandwidth less than double the video playback rate through special video encoding or complex data delivery, but still assumes receivers homogeneity. Client heterogeneity has not been addressed except by a few, recent studies, such as HeRo [2] and BroadCatch [21] that use the server-push approach.…”