Crestron HD-DA-2-QUAD Specifications download pdf (Page 56)

Crestron DigitialMedia

™

Design Guide

Appendix B - HDCP

HDCP Limits in Source Devices

All HDMI sources that utilize HDCP limit the number

of devices that may be connected at any given time.

An important aspect of HDCP is its use of “keys” to

manage the handshaking that occurs between any

two devices.

Every HDMI source device has a limit to the number

of downstream devices it can support, determined

by the number of available HDCP keys, while

simultaneously limiting the depth of devices in the

signal path.

Too many devices or greater-than-allowed depth

in a signal path (from source to display) may create

problems with displaying of audio and video content.

The HDCP specification states that the maximum

depth of devices between source and display is six.

Connecting too many displays or processors causes

the source to simply stop outputting a signal without

warning.

To prevent failures, DigitalMedia tests the HDCP

limits of each HDMI source, allowing the installer

to configure the system around any limitations,

or substitute a different component.

This diagram presents a few possibilities to illustrate

the HDCP key and device depth limitations.

NOTE: Room Media Controllers and Repeaters do not

require HDCP Keys and do not count as devices.

1 2 ... 51 52 53 54 55 56 57 58 59 60 61 ... 79 80

No comments

Crestron HD-DA-2-QUAD Specifications Page 56