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Signal receiving system, TV signal receiving device and method

A TV signal and signal receiving technology, which is applied in the direction of analog security/payment system, TV, color TV, etc., can solve the problem of high implementation cost

Active Publication Date: 2008-10-29
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Signal receiving system, TV signal receiving device and method
  • Signal receiving system, TV signal receiving device and method

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Embodiment Construction

[0021] In order to enable those skilled in the art to better understand the solution of the present invention, and to make the above-mentioned purpose, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings of the embodiments.

[0022] figure 1 It is a system structure diagram of an embodiment of the signal receiving system of the present invention, including a frequency modulation device 1, a demodulation device 2, a buffer device 3, and a subsequent processing device 4, and the received TV signal flows through the frequency modulation device 1 and the demodulation device 2 sequentially in one direction , buffer device 3, follow-up processing device 4.

[0023] The frequency modulation device 1 receives digital signals and / or analog signals and performs frequency modulation processing on the signals. Taking TV signal rec...

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Abstract

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 card to 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, if not, 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

technical field [0001] 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 [0002] 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 CI card from the broadcast TV operator and insert the CI card into a set-top box or TV with a decryption device In the computer, the CA authorization system ensures that users can legally watch encrypted TV programs through a one-way cable network. [0003] In a set-top box or a TV set, there is a separate decoding device for independent decoding of CI card identification, billing, and decoding of encrypted TV programs. Moreover, such a decoding device can only decrypt encrypted digital television signals. For ordinary analog TV signals, encrypted analog TV signal...

Claims

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Application Information

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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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