Method and device for realizing digital television fast descrambling

A digital TV, fast technology, applied in the direction of TV, electrical components, selective content distribution, etc., can solve the problems of poor user experience, unrealistic analysis, occupying more hardware resources, etc., to reduce descrambling time and fast descrambling Effect

Active Publication Date: 2017-02-15
SHENZHEN SKYWORTH DIGITAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Digital TV provides people with rich program content and high-quality audio-visual enjoyment. Compared with analog TV, its signal loss is small and its reception effect is better. Difference
[0003] At present, the commonly used method for quickly changing channels and descrambling is to descramble three programs at the same time, and at the same time analyze the two programs before and after the program list to get CW (Control Word, control word), and some methods even convert all the programs under the current frequency All the programs analyze the CW. Considering the limited resource usage of the processor in the top box, the limit on the total number of Filters, and the communication time of the smart card, it is unrealistic to analyze the CW of all the programs at the current frequency. Interfering with three-channel programs will take up more hardware resources

Method used

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  • Method and device for realizing digital television fast descrambling
  • Method and device for realizing digital television fast descrambling
  • Method and device for realizing digital television fast descrambling

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Embodiment 1

[0025] Please refer to figure 1 , which is a schematic flowchart of a method for realizing fast descrambling of digital TV provided by Embodiment 1 of the present invention. The method of this embodiment can be executed by a set-top box of a digital TV, and can be applied to a scenario where a digital TV switches programs.

[0026] The method for realizing fast descrambling of digital TV in this embodiment may include the following steps:

[0027] S110: Receive a channel change instruction input by a user to switch to a target program.

[0028] Exemplarily, the user can send various commands to the set-top box through the remote control of the digital TV or the menu key on the panel, such as a channel-changing command to switch to target program A, and the set-top box receives the channel-changing command.

[0029] S120: Determine whether there is target entitlement control information of the target program in the prestored entitlement control information data.

[0030] Exe...

Embodiment 2

[0036] Please refer to figure 2 , which is a schematic flowchart of a method for realizing fast descrambling of a digital TV provided by Embodiment 2 of the present invention. The main difference between this embodiment and the embodiment is that the content of the pre-stored authorization control information data sent by the front end is added, and an optional implementation mode is provided when it is determined that there is no target authorization control information in the pre-stored authorization control information data. And an optional implementation after the first descrambling.

[0037] The method for realizing fast descrambling of digital TV in this embodiment may include the following steps:

[0038] S210: Pre-store the authorization control information data sent by the front end.

[0039] Exemplarily, the authorization control information data sent by the front end may include the authorization control information of all programs under the current frequency poi...

Embodiment 3

[0056] Please refer to image 3 , which is an embodiment of an apparatus for realizing fast descrambling of a digital TV provided by Embodiment 3 of the present invention.

[0057] The device 300 for realizing fast descrambling of digital TV in this embodiment may include the following content:

[0058] The channel-changing instruction receiving module 310 is configured to receive a channel-changing instruction input by a user to switch to a target program.

[0059] A judging module 320, configured to judge whether there is target entitlement control information of the target program in the prestored entitlement control information data.

[0060] The control word extraction module 330 is used to judge whether there is target authorization control information of the target program in the pre-stored authorization control information data; if so, send the target authorization control information to the smart card and receive the control word returned by the smart card.

[0061]...

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Abstract

The embodiment of the invention discloses a method and device for realizing digital television fast descrambling. The method comprises the steps of receiving a channel switching instruction of switching to a target program inputted by a user, judging whether pre-stored authorization control information data has the target authorization control information of a target program, sending the target authorization control information to a smart card if so, receiving the control word returned by the smart card, setting a descrambler according to the control word, and descrambling the target program. In the technical scheme, when the pre-stored authorization control information data of a set-top box in the database has the authorization control information of the target program, the control word is extracted from the smart card directly according to the authorization control information to set the descrambler, the control word is obtained without through obtaining the program mapping table of the target program, analyzing and filtering and other operations, in the condition of occupying few hardware resources, the descrambling time of digital TV channel switching is reduced, and the fast descrambling is realized.

Description

technical field [0001] The invention relates to the field of digital television, in particular to a method and device for realizing fast descrambling of digital television. Background technique [0002] Digital TV provides people with rich program content and high-quality audio-visual enjoyment. Compared with analog TV, its signal loss is small and its reception effect is better. Difference. [0003] At present, the commonly used method for quickly changing channels and descrambling is to descramble three programs at the same time, and at the same time analyze the two programs before and after the program list to get CW (Control Word, control word), and some methods even convert all the programs under the current frequency All the programs analyze the CW. Considering the limited resource usage of the processor in the top box, the limit on the total number of Filters, and the communication time of the smart card, it is unrealistic to analyze the CW of all the programs at the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/4623H04N21/426H04N21/434H04N21/4367H04N21/4627H04N7/167
CPCH04N7/167H04N21/426H04N21/434H04N21/4367H04N21/4623H04N21/4627
Inventor 高翔
Owner SHENZHEN SKYWORTH DIGITAL TECH CO LTD
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