NDLI: Rapid synchronization of RTP multicast sessions using the retransmission server

Content Provider	IEEE Xplore Digital Library
Author	Begić, Z. Bajrić, H. Kos, M.
Copyright Year	2010
Description	Author affiliation: BH Telecom Joint Stock Company Sarajevo, Bosnia and Herzegovina (Begić, Z.; Bajrić, H.) \|\| Faculty of Electrical Engineering and Computing, University of Zagreb, Croatia (Kos, M.)
Abstract	Quality of Service (QoS) is still one of the major challenges for emerging services based on the Real-Time Transport Protocol (RTP) to deliver multimedia content. In the context of the Internet Protocol Television (IPTV) services, the synchronization of multimedia components plays an important role. In order to synchronize audio and video components of multimedia content, RTP timestamps have to be related. Periodic Real-Time Transport Control Protocol (RTCP) Sender Report (SR) packets, which associate the RTP timestamps in the stream with a common clock at the transmitter, are associated with each stream. Thus, the frequency and the timing of the RTCP SR packets often contribute to the delay before audio and video are rendered, not just to their synchronization, because many clients will not render anything before the synchronization has been established. Whereas the synchronization delay is problematic in case of network congestion, the retransmission technique is used for the RTP receiver to request the rapid synchronization of RTP multicast sessions from the retransmission server (RS). This paper investigates the concept of isolation of the RTCP from the RTP packets sent from the RS by assigning them to higher priority class which ensures the synchronization delay of the multicast multimedia sessions sufficient for lip-synchronization without excessive delay regardless of network congestion, with accurate statistics measured by RTCP.
Starting Page	326
Ending Page	330
File Size	437879
Page Count	5
File Format	PDF
ISBN	9781424486632
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-09-23
Publisher Place	Croatia
Access Restriction	Subscribed
Rights Holder	University of Split, FESB
Subject Keyword	Strontium Protocols Receivers Streaming media Synchronization Servers Delay
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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