Page 41 - Use cases and requirements for the vehicular multimedia networks - Focus Group on Vehicular Multimedia (FG-VM)

Figure 14 – Diagram of the multimedia system with extended EMM
to support more rights control options

10.3 Gap analysis
At present, multimedia information service is mainly based on either the unidirectional network or
bidirectional networks.
For multimedia information system based on unidirectional networks, the following conventional CA
schemes can be applied to provide simple access control at terminals. Two major drawbacks for such
systems have been analysed in clause 10.2.
1) ETSI Standard: Support for use of scrambling and Conditional Access (CA) within digital
broadcasting systems ETSI ETR 289 ed.1 (1996-10) [ETSI ETR 289]
2) ATSC Standard: Conditional Access System for Terrestrial Broadcast (A/70 Part 1:2010)
[ATSC]
3) China's radio and television industry standard: Specification of conditional access system for
digital television broadcasting GY/Z 175-2001 [CN-CAS]
For multimedia information system based on bi-directional networks, the following conventional
digital rights management (DRM) schemes can be applied. A major drawback of such schemes is that
they cannot be seamlessly integrated with conventional conditional access schemes. Nevertheless, the
concept of rights rules in these DRM schemes can be used to enhance the conventional CA schemes.

1) Open Mobile Alliance: OMA digital rights management (DRM) [OMA DRM]
2) ChinaDRM: Technical specification of digital rights management for internet television,
GY/Z 277-2014 [ChinaDRM]

10.4 Requirements – Content rights protection requirements for CA
The requirements for the content rights protection in converged networks are as follows.

FGVM-01R1 (2019) 31