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Zastosowanie protokołu SDP w systemach multimedialnych realizowanych w technice WEBRTC

Chodorek R. R., Chodorek A., Rzym G., Wajda K.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

2016

nr 6

564--567, CD

Artykuł przedstawia opis sesji multimedialnej za pomocą protokołu SDP, jednego z elementów sygnalizacji WebRTC. Omówiono protokół SDP wraz z odniesieniami do techniki WebRTC oraz komponenty semantyczne sesji WebRTC. Opis formalny zilustrowano przykładami praktycznej realizacji transmisji, z uwzględnieniem danych przesyłanych na poziomach: sesji i mediów.

The paper presents a description sessions using the SDP protocol, functional component of WebRTC signaling. The paper describes the SDP with reference to the WebRTC, as well as semantic components of SDP for the WebRTC. Formal description is illustrated by an example of SDP offer and answer, accomplished with the use of the WebRTC. Signaling data, generated and transferred at the session and media layers, are also presented.

Networked Multimedia with Internet Media Guides

Ott J., Kutscher D., Greifenberg J., Loos K.

Computational Methods in Science and Technology

2005

Vol. 11, nr 2

129-139

Internet Media Guides (IMGs) are a generalisation of Electronic Programme Guides (EPGs) as known from digital video broadcasting (DVB). They are independent of specific metadata formats and thus are able to support a broad range of applications, including EPG distribution for TV networks and distribution of session descriptions for Internet-based multimedia sessions. Unlike most existing approaches, the IMG framework is also completely independent of specific delivery networks for the media content described in media guides—and it is also independent of the distribution mechanisms for the media guides themselves: IMGs can be distributed in unidirectional broadcast networks, they can also retrieved over established query/response protocols such as HTTP, and they allow for asynchronous change-notifications to interested subscribers. This paper presents the fundamental concepts of the IMG framework and introduces the main components. We further describe implementation and application experiences and discuss potential enhancements to the existing IMG specifications.