This Recommendation defines the requirements of multicast adaptive bitrate (M-ABR) system for efficient delivery of real time and non-real time television programs over cable network.

The scope of this Recommendation includes:

 – description of the architecture;

 – requirements of M-ABR system over cable networks and its components;

 – features of multicast network for M-ABR system and content selection.

For more information on the M-ABR system, there are some types of implementations, which can be found, for example, in [b-ETSI TS 103 769], [b-OC-TR-IP-MULTI-ARCH].

This Recommendation is targeted specifically to M-ABR system implementations in cable television network environment.