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commercial IPTV systems

commercial IPTV systems






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  • My talk digests some of the topics at the recent conference, highlights key points w/ regard to where technology is heading, and tries to show how commercial vendors are responding to iptv.
  • This slide shows that pplive may be having some shortcomings and is under pressure – see DRM Impatient may imply less seeding VOD is seen as crucial in order to have iptv compete with p2p streaming video. Not all streaming would be efficient – we want streaming which is locality aware and to somehow give the user the best experience given their particular bandwidth constraints. [Nahrstedt]
  • Less b/w utilization at origin with “smart seeding”, but client mean download rates were lower. This may pose a problem if the provider wants to provide HDTV comparable video, which is highly demanded. (King)
  • Transcoding observation from PAT: Peer-Assisted Transcoding for Overlay Streaming to Heterogeneous Devices
  • The constraint on b/w has us question whether mesh or tree topologies can be used to distribute content in US vs. other countries. Multicast is still a topic of consideration. According to the conference, a paper was published on: A Middleware for Implementation and Evaluation of Application Layer Multicast Protocols in Real Environments

commercial IPTV systems commercial IPTV systems Presentation Transcript

  • How are commercial IPTV services responding to P2P Streaming Video services? Presented by: Roland Krystian Alberciak
  • Roadmap
    • Introduction
    • PPLive: current status and insights
    • What commercial services are doing
    • Conversation with IPTV-for-pay service
  • Introduction
    • Network and Operating Systems Support for Digital Audio & Video (NOSSDAV) conference
    • Panel session: Large Scale Peer-to-Peer Streaming & IPTV Technologies
    • Released in 2004 by “Bill” who dropped out of post-grad school in order to deploy software in dorms
    • Claims:
      • Sept 2007: 3.5 million daily users
      • Jan 2006: 400,000 daily users
      • Weekly average usage time - 11 hours
    • Lots of foreign content [especially China]
  • PPLive limitations
    • Findings show that PPLive peers are “impatient” – only use pplive when actively watching.
    • PPlive now claims to provide DRM controls
    • Questions for p2p streaming:
      • How to enable channel selection based on user interest?
      • VOD?
      • Render multiple channels for simultaneous viewing?
      • Efficient media streaming?
  • RealNetworks: Adopting P2P
    • No need for large scale server farms which only get used a few times of year for rare and infrequent events
    • P2P accomodates popularity, flash crowds
    • Bittorrent distribution and superseeding have been shown to cause b/w cost savings
    • Problems: Though superseeding saves bandwidth, mean download rate was substantially lower.
  • Music workload
  • How to scale iptv
    • How to distribute content? Data Centers? CDN’s?
      • P2P was chosen, since it scales best to ‘flash crowds’ (ie: olympic viewership of 2.5 billion viewers)
    • P2P traffic will have more locality
    • P2P transcoding
    • P2P will become ISP friendly
  • Iptv operators want to…
    • Capitalize on the loading time for a channel during channel switch to provide ads
    • Recognize that most people who use IPTV do so while doing ‘other stuff’
    • A la carte pricing? [debatable]
  • IPTV-service operator conversation
    • Became very ‘animated’ when asked about thoughts on p2p streaming video and how it may influence his/her business
  • Conversation continued
    • Observ.: Unlike Bittorrent, IPTV requires minimum speed to operate
    • Claims: Few peers have enough upload bandwidth to support 2 or more peers
    • Claims: more viable in other countries than US, like Japan, Korea, Sweden
      • DSL for home users goes to 700kbps-8Mbps
      • Compared with 100Mbps in Japan/Korea and even claimed 40 gigabits/s in Sweden
    • Believes multicast will be successful in the future
  • Questions?
  • Sources
    • ACM SigComm 2007 Keynote speech
    • US Internet stuck in the slow lane.
    • Works cited