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Rapid synchronization of RTP multicast sessions using the retransmission server (CROSBI ID 585836)

Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija

Begić, Zlatan ; Bajrić, Himzo ; Kos, Mladen Rapid synchronization of RTP multicast sessions using the retransmission server // Proceedings of SoftCOM. Split: Institute of Electrical and Electronics Engineers (IEEE), 2010. str. 326-330

Podaci o odgovornosti

Begić, Zlatan ; Bajrić, Himzo ; Kos, Mladen

engleski

Rapid synchronization of RTP multicast sessions using the retransmission server

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.

RTP; RTCP; QoS; retransmission

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Podaci o prilogu

326-330.

2010.

objavljeno

Podaci o matičnoj publikaciji

Proceedings of SoftCOM

Split: Institute of Electrical and Electronics Engineers (IEEE)

978-1-4244-8663-2

Podaci o skupu

International Conference on Software, Telecommunications and Computer Networks (SoftCOM), 2010

predavanje

23.09.2010-25.09.2010

Split, Hrvatska

Povezanost rada

Elektrotehnika