CP TECHNOLOGIES 4 CH Digital Video System Manual de usuario descargar pdf (Pagina 3)

For example, cable and satellite providers use conditional access technology to

prevent unauthorized access to content as it is transmitted from the provider to a set-

top box. HDCP then protects that content as it is transmitted from the set-top box to a

TV. The role of HDCP is to prevent interception and copying or other unauthorized use

of this bit stream.

Interfaces

HDCP operates entirely over certain digital interfaces, known as HDCP-protected interfaces,

as shown in gure 1. Some upstream content protection technologies, such as the Advanced

Access Content System (AACS) used for Blu-ray discs, require all content transmitted over digital

interfaces to be protected using HDCP.

HDCP does not protect content that is sent to TVs via traditional analog outputs; however,

using analog outputs may mean losing desirable features, such as higher resolution, that are

made available only via digital interfaces.

In this paper, we will focus on the use of HDCP over the High-Denition Multimedia Interface

(HDMI). This digital interface has been very widely adopted by makers of HDTVs and other

Content Protection

Media Sources

HDMI

DVI

Display Port

GVIF

UDI

Sinks

AACS

CSS

Vendor-Specic DRM

Conditional Access

Blu-Ray Player

Computer Monitor

Projector

Set-Top Box

Interfaces

HDCP

Figure 1.

The Content Protection chain.

1 2 3 4 5 6 7 8 ... 11 12

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