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Conditional Access Module Various types of CAM. A conditional access module (CAM) is an electronic device, usually incorporating a slot for a smart card, which equips an integrated digital television or set-top box with the appropriate hardware facility to view conditional access content that has been encrypted using a conditional access system. [1]
An analog Nagravision system (Syster) for scrambling analog satellite television programs was used in the 1990s.In this line-shuffling system, bottom 32 lines of the PAL TV signal are shifted in time by one video field, and read out in permuted order under the control of a pseudorandom number generator.
The Common Interface allows TV manufacturers to support many different pay TV stations, by allowing to plug in exchangeable conditional-access modules (CAM) for various encryption schemes. The Common Interface is the connection between the TV tuner (TV or set-top box) and the module that decrypts the TV signal (CAM). This module, in turn, then ...
The MediaCipher system, owned by Motorola, along with Scientific Atlanta's PowerKEY system, are the only digital TV encryption systems which have not publicly been compromised. This is largely thanks to there being no PC card conditional-access modules (CAMs) available for either encryption system.
The 8-VSB modulation in the ATSC system corresponds with the 64-QAM modulation of J.83b. In a 6 MHz channel, the data rate is at most 36 Mbit/s (for 64-QAM or 8-VSB); the 8-VSB ATSC achieves a data rate of 19.3926 Mbit/s while the 64-QAM J.83b achieves a data rate of 26.970 Mbit/s.
DISH HD, newest version used with the Hopper and Joey system Hopper is a line of multi-tuner set-top boxes first introduced in 2012; they are digital video recorders that can be networked with accompanying "Joey" set-top boxes for multi-room access to recordings.