Browsing locking method of digital programs, digital television terminal and safety device

A security device and program technology, applied in TV, electrical components, analog security/charging system, etc., can solve the problems of inability to effectively guarantee the vital interests of service providers, smart card restrictions, economic losses of service providers, etc., to protect the vital interests, prevention of infringement or attack, and protection of legitimate rights and interests

Active Publication Date: 2009-09-30
北京视博数字电视科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in the related art, there is no limit to the number of programs that the smart card 112 can simultaneously decrypt, which causes authorized users to use one smart card and multiple receiving terminals, that is, multiple machines and one card can watch multiple programs at the same time, which cannot effectively guarantee The vital interests of the service provider bring huge economic losses to the service provider

Method used

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  • Browsing locking method of digital programs, digital television terminal and safety device
  • Browsing locking method of digital programs, digital television terminal and safety device
  • Browsing locking method of digital programs, digital television terminal and safety device

Examples

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Comparison scheme
Effect test

Embodiment approach 1

[0031] The present invention also provides a digital television terminal, such as image 3 As shown, the terminal includes at least a descrambling unit 303 and a playback unit 305; wherein, the terminal also includes:

[0032] A filtering / receiving unit 301, configured to receive data packets sent by the front end;

[0033] The security device 302 includes at least a first processing unit 302a, the first processing unit 302a is configured to receive the data packet transmitted by the filtering / receiving unit 301, carrying the information including the program identification, the delivery time and / or the length of the decryption cycle, and the The data packet is analyzed, and at the same time, the number of decrypted data packets of different program streams is counted, and it is judged whether the number exceeds the preset value. If the judgment result is yes, the security device will not decrypt the data packet; if the judgment result is no , the packet is decrypted.

[003...

Embodiment approach 2

[0048] The present invention provides a method for browsing and locking digital programs. Figure 3-5 This method will be described in detail.

[0049] The method includes: the terminal security device 302 counts the number of data packets simultaneously decrypting different program streams; judging whether the number exceeds a preset value; if the judging result is yes, the security device 302 does not decrypt the received data packets decrypt.

[0050] Through this method, the number of simultaneous decryption of different program streams by the security device 302 is effectively limited, thereby limiting the number of digital programs descrambled by the terminal, that is, limiting the number of programs watched by the end user, and preventing one card and multiple machines from watching multiple programs at the same time , effectively protecting the vital interests of service providers and safeguarding the legitimate rights and interests of service providers.

[0051] In ...

Embodiment approach 3

[0111] The present invention also provides a safety device, the composition of the safety device is as follows: Figure 4 It is described in Embodiment 1 and will not be repeated here.

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Abstract

The invention provides a browsing locking method of digital programs, a digital television terminal and a safety device. The method comprises the following steps: a terminal safety device counts the quantity of data packets which decrypt different program streams simultaneously; whether the quantity exceeds a preset value or not is judged; and if the judged result shows that the quantity exceeds the preset value, the safety device dose not decrypt the received data packets. The invention effectively restricts the quantity of different program streams simultaneously decrypted by the safety device, thereby restricting the quantity of digital programs descrambled at the terminal, namely restricting the quantity of programs televiewed by terminal users, preventing a plurality of televisions from simultaneously televiewing a plurality of sets of programs using one card, effectively protecting the vital interests of service providers and guaranteeing the legitimate rights of the service providers.

Description

technical field [0001] The invention relates to digital television technology, in particular to a method for browsing and locking digital programs, a digital television terminal and a safety device. Background technique [0002] As we all know, the conditional access system (CAS) refers to a system used to control users to receive broadcast services, and usually realizes the paid service of the broadcast system through authorization management. [0003] figure 1 It is a schematic diagram of the digital TV conditional access system. Such as figure 1 As shown, the CA system includes a front end 101 and a terminal 102 . Wherein, the front end 101 includes an entitlement control message generator (ECMG: Entitlement Control Message Generator) 104 and an entitlement management message generator (EMMG: Entitlement Management Message Generator) 106; the terminal 102 includes a terminal security unit, which may be a smart card 112 . [0004] Such as figure 1 , 2 As shown, the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/16H04N7/167
Inventor 王天星王文军王宇李伟东
Owner 北京视博数字电视科技有限公司
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