VG DRM 简介

VideoGuard DRM

最近做项目时，要集成多种DRM到视频解决方案中，有Insys （NC+运行商），VG-DRM （Megacable墨西哥运行商），Verimatrix等。今天先把了解到的VG-DRM的资料整理下。VG-DRM集成到运营商现在的视频解决方案中可以降低复杂度和减少成本，有以下的一些优势。

VG-DRM 系统里可以支持多种DRM，提供一个multi DRM Framework和统一的Headend service，这种解决方案对于可适用与运营商选择不用的DRM系统。在付费视频领域，运营商也会选择几种DRM配合使用，而VG-DRM可以提供接口整合其他DRM。

VG-DRM支持当前大多数设备，PC，Macs，iPad, iPhone, iPod touch， Android mobile and tablet devices, Gameing consoles, IP set-boxes and Connected TV等。

VG-DRM 也可以支持多种用户场景，非常灵活，比如 订阅，租用，下载，Cloud DVR，Event-based等。

 

VG-DRM不仅负责对live，VOD，cDVR进行加密和授权，还包括以下多种功能。

 

VG-DRM Headend component

Secure Gateway

 The SGW is the headend entry point, It validates the client and it’s requests and prevents unauthorized access. It can also enforce various commands on the client.

 

Policy server (DCCS)

The policy server manages the active concurrent session tickets for each device per domain and enforcing predefined license generation policies.

 

DRM Server (DRM-S)

The main DRM Headend component, responsible for:

•Client registration process (Identity)

•Generation of Linear and VOD viewing licenses

•Enforcing the system’s security on the devices

 

SDLL/DNXg Generator

Generate the encrypted device personalized secured objects.

Different plugins platforms:

SDLLg – intended for PC/Mac platforms

DNXg – intended for mobile devices iOS/Android platforms

 

 

Key Store

Responsible for allocation and sharing of the VOD assets keys

（注明：负责VOD的加密）

 

ECM Server

Sends to the DRM Server the Linear channels data (channel id, channel access crateria, channel events…)

 （注明：负责live的加密）

User Profile Management (UPM)

Central Repository of domain related data, holds the Households and devices profiles (Authorization, Preferences and any associated data)

 

ABR-E

The Adaptive Bitrate Encryptor encrypts content, both Linear(LIVE) or VOD (offline) using the keys and control word(CW) provided by the ECM Server and Keystore.