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Wireless Multimedia Services and Applications
Published in K.R. Rao, Zoran S. Bojkovic, Dragorad A. Milovanovic, Wireless Multimedia Communications, 2018
K.R. Rao, Zoran S. Bojkovic, Dragorad A. Milovanovic
SIP is a session control protocol. It can create and terminate sessions with one or more participations. SIP supports user mobility by proxying and redirecting requests to the user’s current location. SIP allows the specification of session properties during session initiation via the Session Description Protocol (SDP). SDP is used for describing multimedia sessions for the purposes of session announcement, session invitation, and other forms of multimedia session initiation. For example, an SDP description can include the session name and purpose, the time the session is active, the media compressing the session, information on how to receive such media (addresses, ports, formats, etc.), as well as many other session attributes. For new types of sessions, new SDP description formats can be introduced and standardized.
Compression Support in SDP
Published in Radhika Ranjan Roy, Handbook of SDP for Multimedia Session Negotiations, 2018
This section describes Request for Comments (RFC) 3485 that specifies Session Description Protocol (SDP) and Session Initiation Protocol (SIP) static dictionary for SIP and SDP for signaling compression (SigComp). SIP is a text-based protocol for initiating and managing communication sessions. The protocol can be compressed by using SigComp. Similarly, the SDP is a text-based protocol intended for describing multimedia sessions for the purposes of session announcement, session invitation, and other forms of multimedia session initiation. This RFC defines the SIP/SDP-specific static dictionary that SigComp may use in order to achieve higher efficiency. The dictionary is compression algorithm independent.
Live Video and On-Demand Streaming
Published in Borko Furht, Syed Ahson, Handbook of Mobile Broadcasting, 2008
I. S. Venieris, E. Kosmatos, C. Papagianni, G. N. Prezerakos
The Session Description Protocol (SDP) is used to describe multimedia sessions, for the purpose of session announcement, session invitation, and other forms of multimedia session initiation. SDP is a format for session description and is used in conjunction with transport protocols such as the Session Announcement Protocol (SAP), Session Initiation Protocol (SIP), Real-Time Streaming Protocol, and Hypertext Transport Protocol. The SDP carries information concerning the multimedia session, such as session name and purpose, time the session is active, media comprising the session, and information to receive the media (address, etc.).
Evaluation of video payload over low latency networks: Flexilink
Published in International Journal of Parallel, Emergent and Distributed Systems, 2020
Rongxuan Ma, Yonghao Wang, Wei Hu, Mahir Payyanil Karalakath
The original incoming MPEG stream is fed to the network port of an interface and the MPEG stream passed over an IP tunnel is extracted through the network port of the interface. As a result, it is possible to provide QoS features to the MPEG stream fed via the network port of Aubergine. In this case, the number of slots required to transmit the AV packets needs to be found out and this can be done by reading the SIP/SDP (Session description protocol) information. An AV packet header needs to be inserted at the front of each 63byte AV payload. All the AV header will have length n = 63 and f = 1 (representing information is continued in next packet) except for the last one, which has a length equivalent to the number of bytes left and f = 0. There will be more AV packets generated because the IP packet must be chopped into fragments of up to 63 bytes each, with f = 0 in the last one and f = 1 in all the others. Option 3 (ripping the MPEG stream over IP and fetching via media port)
Efficient video transmission—a critical review of various protocols and strategies
Published in Journal of the Chinese Institute of Engineers, 2021
Ali Siddique, Abdul Rauf Bhatti, Ahmed Bilal Awan, Arslan Dawood Butt, Ali S. Alghamdi, Muhammad Farhan, Nadia Rasheed
The session initiation protocol (SIP, see [Rosenberg et al. 2002]) along with the session description protocol (SDP, see [Handley and Jacobson 1998]), real-time streaming protocol (RTSP), and H.245 (ITU (International Telecommunication Union) 2011) are the commonly used as control protocols. These are used to announce the availability of a media stream, to negotiate the capabilities of the sender/receiver, to control a running session, and to establish (physical or virtual) connections. They are not relevant for the media transmission itself and are ignored in most papers on video coding (Wenger 2003).