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Internet Protocol Television

Internet Protocol Television. YOU ARE WATCHING IPTV The Future of Television. IPTV: Background. Digital TV service delivered using IP TV content received by viewer through network technologies Usually bundled with Internet services such as Web access and VoIP . IPTV vs. Internet TV.

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Internet Protocol Television

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  1. Internet Protocol Television YOU ARE WATCHING IPTVThe Future of Television

  2. IPTV: Background • Digital TV service delivered using IP • TV content received by viewer through network technologies • Usually bundled with Internet services such as Web access and VoIP

  3. IPTV vs. Internet TV • Control over delivery enables a guaranteed QoS • Allows service provider to offer enhanced user experience • Internet TV refers to transport streams sent over IP networks from outside the network that connects to user • Internet TV provider has no control over final delivery • Broadcasts on "best effort" basis • Elementary streams over IP networks (ex YouTube) are NOT considered IPTV

  4. IPTV: Delivery Methods • Delivery as a file transfer (FTP/Bit Torrent) • Broadcast (Live TV) • Video on demand (VOD) • Broadcast & VOD for real-time viewing

  5. IPTV: Broadcast • Each feed provided unique channel number • Establish multicast connection • Eliminates need for all digitized channels to flow into homes • Each source is input into broadcast encoder • Packetizes the video stream • Servers support delivery of multicast and unicast • VOD response flows as sequence unicast datagrams

  6. IPTV: Protocols • Compressed using MPEG-2 or MPEG-4 codec • Delivered via : • IP Multicast Live TV • IP Unicast Video on Demand • IP Multicast  Info simultaneously sent to multiple computers • Live TV: IGMP connecting to multicast stream and changing from one multicast stream to another • VOD: Real Time Streaming Protocol (RTSP)

  7. IPTV: Underlying Protocols • Real-time Transport Protocol (RTP) • Defines standardized packet format • Real-Time Transport Control Protocol (RTCP) • Provides info about participants in ongoing session • Mechanism to monitor the quality of service • Operates via periodic transmission control packets

  8. IPTV: Transport – UDP/RAW • Video can be transported in UDP packets without RTP • Transport stream referred to as UDP/RAW • Error/informational conditions can be detected: • Sender changed • Missing synchronization bytes • Incorrect packet size • Time-outs • Excessive jitter • Improper UDP bit rate

  9. IPTV: Transport – UDP/RTP • UDP/RTP can compensate for error conditions • UDP/RTP enables receiver to: • Determine if packet is lost • Can compensate for the occurrence of lost packets • Time stamp enables receiver to: • Perform synchronization • Resolve jitter due to delays • Detect several additional error conditions

  10. IPTV: Enhanced User Experience • Interactive program guide • Picture-in-picture functionality • Look up a player’s stats watching sports • Change camera angle • Access photos/music from PC on TV • Use cell phone to schedule recording

  11. IPTV: Benefits • Ability to integrate TV with other IP-based services (ex. high speed Internet and VoIP) • Delivery of more content and functionality • Only content customer selects sent • Frees up bandwidth • Customer’s choice less restricted by ‘pipe’ size

  12. IPTV: Drawbacks • Customer's privacy could be compromised • Provides a means to hack into or disrupt (ex. DoS attacks) the private network • Sensitive to packet loss • Sensitive to delays if connection not fast enough • Troublesome streaming across wireless links

  13. IPTV: Jitter Concerns • Problem: displacement of packets • Referred to as jitter • Solution: jitter buffer at receiver • Memory used to compensate for delays • Packets enter receiver’s jitter buffer • Extracted at applicable times

  14. IPTV: Screenshot

  15. IPTV: Major Players • BT Vision • Internet television • Joost • Continuous Computing • Microsoft Mediaroom • NOW TV • P2PTV • LiveStation • Zattoo • IP Triple Play

  16. IPTV: Future • Expected to grow • Biggest challenge is integration with core network • Better manage tech already in customer's domain • Long-term stability • Personalized TV • IPTV with NGN • Next-Generation Network (NGN) network handles heavy traffic • Enables content providers to deliver heavy media content across network • Killer app for Next Generation Internet??

  17. Citations • Marcio Nieblas Zapater, Graca Bressan, "A Proposed Approach for Quality of Experience Assurance of IPTV," icds, p. 25,  First International Conference on the Digital Society (ICDS'07),  2007 • Jay Kishigami, "The Role of QoE on IPTV Services style," ism, pp. 11-13,  Ninth IEEE International Symposium on Multimedia (ISM 2007),  2007 • Yuzo Iano, Marcus Pereira Magri, "How to architect an IPTV system," wiamis, p. 53,  Eight International Workshop on Image Analysis for Multimedia Interactive Services (WIAMIS '07),  2007 • Benjamin Alfonsi, "I Want My IPTV: Internet Protocol Television Predicted a 'Winner,'" IEEE Distributed Systems Online, vol. 6, no. 2, 2005.

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