Philips Q543.1E LA Service Manual page 44

EN 44 7. Q543.1E LA
7.7 Common Interface CI+
Together with this platform, an extension to the Common
Interface (CI) Conditional Access system is added, called CI+.
CI+ or Common Interface Plus is a specification that extends
the Common Interface (DVB-CI) as described in the digital
broadcasting standard DVB.
The weakness of the conventional CI module used in a
Conditional Access system was the absence of a Copy
Protection mechanism, as decrypted content could be sent
over the PCMCIA interface unscrambled. With the CI+
extension, a form of copy protection is established between the
Conditional Access Module (CAM) and the Integrated Digital
Television (IDTV). The security mechanisms in CI+ are
derived/copied from POD (with the exception of Out Of Band
(OOB) used in US CA systems). For more information about
conventional CA systems using a CI module, refer to the
BJ3.0E L/PA or BL2.xU Service Manual.
The CI+ standard is downwards compatible with the existing CI
standard.
The following figure shows the implementation of the CI+
Conditional Access system in the TV543 platform.
channel
TS -IN P U T
tuner
decoder
T ransport stream
interface
(S C )
Figure 7-13 CI+ Conditional Access implementation
2009-Mar-27
Circuit Descriptions
M atrix
M atrix
D E S /AE S d eco d er
d em u x
d escram b ler
M H E G C I+
P N X 8543
C om m and
interface
Tran sp o rt S tream s
C A-C o n tro l
C A M
P ro p rietary C A
scram b ling
C I + S tan d ard ised C C S
scram b ling
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