Signal receiving system, TV signal receiving device and method
A technology for TV signal and signal reception, applied in analog security/charging system, TV, color TV, etc., can solve the problem of high implementation cost
Active Publication Date: 2010-11-10
HISENSE VISUAL TECH CO LTD
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Problems solved by technology
Although this kind of research and development is also committed to solving the transmission of TV signals, the implementation cost of this method is very high
Method used
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The invention relates to a signal receiving system, a television signal receiving device and a television signal receiving method, wherein, the signal receiving system comprises a frequency modulation device, a demodulation device, a buffering device, a decryption device, a follow-up treatment device and also comprises a card-type detection device which is used for detecting the type of a CI cardto determine whether the type of the card is the authorized one, if so, the voltage power supply is carried out for the authorized CI card and information identification in the CI card is started, ifnot, the detection of the card type is carried out repeatedly; and a decryption control device which is controlled by the card-type detection device and is switched on after the voltage power supply of the CI card and switched off when no voltage exists on the CI card.
Description
A signal receiving system, a TV signal receiving device and a TV signal receiving method technical field The invention relates to the field of television signal reception, in particular to a signal reception system, a television signal reception device and a television signal reception method in the field of digital signals. Background technique In the field of digital TV, since most of the digital signals are encrypted, if users need to watch encrypted TV programs, they need to buy a CIcard from the broadcast TV operator, and insert the CIcard into a set-top box or TV with a decryption device Among them, the CA authorization system is used to ensure that users legally watch encrypted TV programs through a one-way cable network. In a set-top box or a TV set, there is a separate decoding device for the identification, billing and decoding of encrypted TV programs of the CIcard to perform independent decoding. Moreover, such a decoding device can only decrypt encrypted dig...
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IPC IPC(8): H04N7/16H04N5/44H04N5/00H04N21/426H04N21/462
Inventor 杨勇董波林小峰张建春
Owner HISENSE VISUAL TECH CO LTD
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