scope:

This Recommendation specifies the high level requirements to support IPTV services. These include IPTV requirements for service offering, network aspects, QoS and QoE, service and content protection, end system, middleware and content.

Organization

The taxonomy that articulates this Recommendation is therefore twofold:

• A functional taxonomy, which aims at reflecting the fact that IPTV services are deployed and operated according to the combined activation of a set of elementary capabilities - IPTV traffic forwarding and routing, IPTV quality of service and quality of experience, IPTV security, IPTV middleware, etc.

• Within each of the aforementioned functional areas, a further classification organizes the requirements into mandatory requirements, recommended requirements and optional requirements.

IPTV domains

Figure 1-1 shows the main domains that are involved in the provision of IPTV services [ITU-T Y.1910]. It is provided in this Recommendation to help the understanding of requirements which in some way relate to these domains. These domains do not define a business model. Also, one provider may play in multiple domains in the provision of an actual service.