Interfacing an NRSS-A smart card within an NRSS-B PCMCIA

Details Interfacing an NRSS-A smart card within an NRSS-B PCMCIA Interfacing an NRSS-A smart card within an NRSS-B PCMCIA

2000-06-02

2004-02-17

Gaffin, Jeffrey (Department: 2182)

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus access regulation

C710S013000, C710S033000, C710S074000, C712S225000, C370S509000

Reexamination Certificate

active

06694396

ABSTRACT:

FIELD OF INVENTION
This invention is related to descrambling a transport stream. In particular, this invention is related to descrambling a transport stream using information from a smart card.
BACKGROUND OF THE INVENTION
The National Renewal Security System (NRSS) has defined two types of conditional access (CA) modules, an NRSS-A module (with a smart card form factor) and NRSS-B module (with a PCMCIA form factor). Not only are the form factors different for the part A and part B modules but also the protocols are different.
A television (TV), set top box, or cable box manufacturer may need to provide two types of NRSS slots for the CA module, one that has a smart card form factor, and one that has a PCMCIA form factor, and support the protocols for each. To support the two conditional access modules, a TV, set top box or cable box manufacturer currently needs to implement a separate NRSS-B PCMCIA form factor reader as well as a separate NRSS-A smart card form factor reader, as shown in
FIGS. 1 and 2
.
FIG. 1
shows an NRSS-B CA module
100
that receives smart card
110
. A smart card interface
120
transmits signals from the smart card
110
to central processing unit (CPU)
130
. The CPU
130
detects control words from the signals, and sends the control words to descrambler integrated circuit (IC)
140
. The descrambler IC
140
receives a scrambled transport stream from host
150
, descrambles the stream using the control words, and outputs a descrambled stream to copy protection module
160
. Copy protection module
160
protects the descrambled stream and transmits the stream back to host
150
. The copy protected descrambled stream may be a digitally formatted movie, for example.
FIG. 2
shows an NRSS-A smart card
200
that receives a scrambled transport stream from host device
210
. The scrambled stream is received by descrambler IC
220
. CPU
230
sends control words to descrambler IC. The descrambler IC
220
then uses the control words to descramble the transport stream and to output a descrambled stream to host
210
. The stream is protected by copy protection module
240
, and the descrambled copy protected transport stream is set from smart card
200
to host
210
.
SUMMARY OF THE INVENTION
An adapter having a slot, a connector, and a passive router that routes signals from a smart card inserted in the slot to the connector, is disclosed.


REFERENCES:
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patent: 5768539 (1998-06-01), Metze et al.
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patent: 6122175 (2000-09-01), Shieh
patent: 6149450 (2000-11-01), Gastineau
patent: 6370143 (2002-04-01), Yamagishi
patent: 6396850 (2002-05-01), De Vito
patent: 6457641 (2002-10-01), Reichardt
International Search Report in connection with International Application No. PCT/US00/16196 dated Aug. 28, 2000 (6 pages).

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