ClearOne Digital Media - Manual (Page 33)

Q: How can a dealer identify products which may not properly implement
HDCP?
Unfortunately HDCP was largely designed for consumer applications where point to point
is the normal connection protocol and 1 to n signal distribution, such as found in HDMI
matrix switches, is almost nonexistent. ClearOne will never attempt to label products as
“conforming” or “nonconforming”. However, in the interest of protecting our dealers from
making an innocent mistake and selecting products which could have a disastrous legal
result, we suggest you be cautious and seek written assurances if a manufacturer claims
any of the following.
1 . If a manufacturer says they have a special HDCP bypass or “lawyer” button, steer clear
as this is expressly prohibited by the HDCP robustness rules and is a clear violation of
their agreement with the Digital CP.
2 . If a manufacturer claims they can support more simultaneous displays than the
connected source has keys, steer clear as the only way to do this is to work around
the KSV limitation by regenerating keys or some other trick, all of which are expressly
prohibited.
3 . If a manufacturer claims they can support more than 127 connected devices. The
upper limit for the number of connected displays to a source is 127. Any claim beyond
this is a clear sign the manufacturer is not properly implementing HDCP.
4 . If a manufacturer suggests there is a consumer implementation of HDCP and a
professional implementation which is designed for the unique requirements of matrix
switched HDMI systems. At the moment of this writing there are not two different
implementation specifications. Furthermore, the content providers are the ones who
ultimately specify how their content is protected. This means even if a professional
version where to be introduced, if the leading content providers do not authorize it their
content will fail to play over your systems.
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pg 33 StreamNet Digital Media and System Design Reference Guide
HDCP Quick FAQ