scope:

The present document provides a first set of standardized specifications for early deployments of DVB services over bi-directional IP networks. The phase 1 work is limited to MPEG-2 DVB services [1] encoded with MPEG-2 technology [63], [64] and encapsulated in MPEG-2 TS [62] and covers both Live Media Broadcast services (i.e. TV or radio styles) Media Broadcast with Trick Modes and Content on Demand services (CoD) (see also clause 6.2). These specifications define the mechanisms required in order for a consumer to be able to buy a standard DVB Home Network End Device, take it home, plug it into an IP network, choose and consume DVB services available over the IP network. Clause 4 describes the architectural framework defined for this set of specifications and introduces the system reference model. The contents of the remaining clauses are described below.

Scope of the present document

What is within the scope

The present document provides specifications to be supported on the interface to the HNED defined as IPI-1 in clause 4 and is based on IP version 4.

It provides a set of technical specifications which covers the following areas:

• The delivery of DVB MPEG-2 based services over bi-directional IP networks, both for Live Media Broadcast services (i.e. TV or radio styles) and Content on Demand services. Clause 7 on transport covers the encapsulation of MPEG-2 services for delivery over IP and the protocols to be used to access such services. Quality of Service is covered, based on Differentiated Services (DiffServ).

• The Service Discovery and Selection (SD&S) mechanism for DVB MPEG-2 based A/V services over bi-directional IP networks. Clause 5 on SD&S defines the service discovery information, its data format and the protocols to use for carriage of this information. Both push and pull models of delivery are supported.

• The use of command and control application-level protocol RTSP to control CoD services and optionally to join multicast services. This is covered in clause 6.

• Clause 8 deals with the assignment of an IP Address to a Home Network End Device (HNED) to get onto the network. The specification is based on DHCP and is restricted to the scenarios where an HNED has a single interface onto the home network and there is a single Delivery Network Gateway (DNG) per home network segment.

• Clause 9 covers an identification agent for the HNED. This agent provides a simple identification of the HNED to signal its existence to the Network Service Provider if requested.

• Network provisioning. Clause 10 covers an optional network management and provisioning agent. This agent allows a Network Service Provider to automatically provision the end device with additional functionalities.

What is out of the scope

The following subjects are not covered in the present document:

• Support for non MPEG-2 TS based services.

• Specific support for Conditional Access or Content Protection.

• Network security and authentication.

• Trick modes (i.e. Pause, Fast Forward, etc.) for Live Media Broadcast services over multicast, e.g. network PVR services.

• IP version 6.

• Configuration of current retail routers and DNGs.

Additional Specifications for Home Network Segments

The present document does not cover home networking but does not conflict with protocols like UPnP. These protocols can be added to the IPI-1 interface as options.

Clauses 11 and 12 provide respectively specifications for the carriage over Ethernet and IEEE P1394.1 [10].

DTDs and XML Schemas

The normative DTDs and XML schemas referenced by the present document are attached as separate files contained in archive ts_102034v010201p0.zip which accompanies the present document. The DTDs and XML schemas included in the present document are informative.