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Future of Movie Delivery on the Internet: Key Issues and Trends

Explore the challenges and trends in internet movie delivery including streaming vs. download, VBR vs. CBR, QoS levels, bandwidth demands, and storage issues. Discover insights into class-level vs. flow-level QoS, the impact of interactive VR, and the need for advanced solutions.

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Future of Movie Delivery on the Internet: Key Issues and Trends

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  1. Movie Delivery in the Internet- in 5 minutes - Jorg Liebeherr Department of Computer Science University of Virginia

  2. Interesting Issues • Streaming vs. Download • Storage • VBR vs. CBR • class-level vs. flow-level QoS

  3. Most media types: • have hardly real-time needs • have hardly bandwidth needs • High-bandwidth media types with stringent QoS demand: • don’t exist in large numbers Interactive VR • don’t exist Web-style content videoconference Games Movies Telephony Live TV Control Media Types and their Demand high Bandwidth Demand low online(stringent) offline(less stringent) QoS Demand

  4. Traditionally, are handled via over-provisioning or simple (TOS-like) differentiation Unsubstantiated claim • Claim: For media delivery, most of the bandwidth will be consumed by “offline high-bandwidth” media types • Two ways to transmit these media: • Download • Streaming

  5. Download Time of an MPEG-2 Movie • 90 min @ 6 Mbps  approx. 4 GB Probably not of interest Duration of Movie Probably Streaming Download or Streaming Probably Download (1 Mbps) (1 Gbps) (1 Tbps)

  6. very fast (> 100 Gbps) download cache slow (< 10 Mbps) stream Download vs. Streaming • Operating point will be determined by available technology • QoS issues: • probably none for downloads in core network (due to high data rates) • probably none for down-stream streaming in access network (due to lack of contention for resources) • Key Issue: • Placement of content at the edges of the core network determines user-level latencies.

  7. Summary: Movie delivery in the Internet within 5 years • Classical QoS concepts may not be useful • Storage issues seem more important  Good target for QoS research • Disclaimer: The above comments do not apply to media types with stringent QoS demands: • telephony • games • control • interactive VR

  8. Streaming Media: How to deal with VBR traffic? • Add delay: Smoothing turns VBR into CBR traffic • Traffic theory: Statistical multiplexing theory tells us that aggregated VBR sources appear smooth • Economy of scale: If number of receivers is large, peak rate allocation is justifiable

  9. Class-level vs. flow-level QoS • This is a matter of desired effort of deployment and desired QoS: • Theoretical understanding of flow-level QoS is very good, and catching up for class-level QoS • Class-level QoS is useful to protect legacy traffic (best effort, TCP) • Problems (of both types of QoS): • QoS notions are revamped before they mature • The quality of commercial QoS implementations is insufficient

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