CP TECHNOLOGIES 4 CH Digital Video System Manual de usuario descargar pdf (Pagina 6)

Some possible arrangements:

1. A TV (sink) is connected to one or more sources. An example is an HDTV with four HDMI

inputs. A consumer could connect one source, such as a Blu-ray player, satellite set-top

box or game console, to each of these inputs. The consumer selects a single source and

views the content via the TV.

2. Multiple sources are connected to an audiovisual receiver, which acts as a repeater, as

shown in gure 2. The receiver’s output is connected to the sink (TV). In this case, the

consumer uses the AV receiver to select the source. The receiver separates out the audio

signal and amplies it to deliver surround sound, and then transmits the visual content to

the TV.

3. A sports bar has a single input, such as a digital broadcast of a football game, and wishes

to display the content on multiple TV screens. The bar uses an HDMI repeater to do this.

The repeater receives input from a single satellite box source and sends the content to

multiple displays (sinks).

How HDCP works

HDCP protects content using authentication and encryption. Before sending HDCP-protected

data, the transmitting device initiates an authentication process to conrm that the receiver

is authorized to receive the data. Once the receiver has been authenticated, the transmitter

encrypts the data stream to prevent eavesdropping and sends it to the receiver.

Each HDCP transmitter or receiver includes 40 56-bit secret keys, known as Device Private Keys,

as shown in gure 3. These keys, provided by DCP, are unique to the transmitter or receiver,

highly condential and not available to other devices.

Source

Repeater Sinks

Receiver

0100010001

HDCP

Render

only

Render

only

Upstream content

protection e.g. AACS

Transmitter

Receiver

Figure 3.

HDCP tree showcasing receivers,

transmitters and keys

1 2 3 4 5 6 7 8 9 10 11 12

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CP TECHNOLOGIES 4 CH Digital Video System Manual de usuario Pagina 6