Abstract
One of the most important challenges for next generation all-IP networks is the convergence and interaction of wireless and wired networks in a smooth and efficient manner. This challenge will need to be faced if broadcast transmission networks are to converge with IP infrastructure. The 2nd generation of DVB standards supports the Generic Stream, allowing the direct transmission of IP-based content using the Generic Stream Encapsulation (GSE), in addition to the native Transport Stream (TS). However, the current signalling framework is based on MPEG-2 Tables that rely upon the TS. This paper examines the feasibility of providing a GSE signalling framework, eliminating the need for the TS. The requirements and potential benefits of this new approach are described. It reviews prospective methods that may be suitable for network discovery and selection and analyses different options for the transport and syntax of this signalling metadata. It is anticipated that the design of a GSE-only signalling system will enable DVB networks to function as a part of the Internet.
Highlights
The first generation of Digital Video Broadcasting (DVB) standards [1,2,3] uses a timedivision transmission multiplexing method derived directly from the Moving Pictures Expert Group-2 Transport Stream (MPEG-2 TS) standards [4]
Some transmission systems use IP-based Service Discovery and Selection (SD&S) procedures to obtain content metadata, for example, acquisition of an Electronic Service Guide (ESG), the network signalling necessary for the initial bootstrapping is sent using MPEG
Its compression gain is typically much lower than for BIM; Program Specific Information (PSI)/Service Information (SI) Sections converted into XML and compressed with GZIP can increase the overall volume of data by 30% compared to the original binary encoded size [34]
Summary
The first generation of DVB standards [1,2,3] uses a timedivision transmission multiplexing method derived directly from the Moving Pictures Expert Group-2 Transport Stream (MPEG-2 TS) standards [4]. The MPEG-2 specifications define the Program Specific Information (PSI), a Tablebased signalling system that is multiplexed with the content and allows a receiver to identify MPEG-2 Programs and to demultiplex their Program Elements from the TS. Some transmission systems use IP-based Service Discovery and Selection (SD&S) procedures to obtain content metadata, for example, acquisition of an Electronic Service Guide (ESG), the network signalling necessary for the initial bootstrapping is sent using MPEG. The receiver needs to set a filter that extracts the appropriate signalling from the multiplex selected based on the required network service.
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