Unlock instant, AI-driven research and patent intelligence for your innovation.

Descrambling device and TV system using the descrambling device

A TV system and descrambling technology, which is applied in the field related to descrambling technology, can solve the problem of loss of chip manufacturers

Active Publication Date: 2017-04-19
MEDIATEK INC
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, once the software used to set the descrambling mode in the chip is cracked and modified (for example, turning on a function that was originally set to be disabled by the chip manufacturer), the descrambling chip that is scheduled to be sold to region A may be transferred to Region B is used, resulting in huge losses for chipmakers

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Descrambling device and TV system using the descrambling device
  • Descrambling device and TV system using the descrambling device
  • Descrambling device and TV system using the descrambling device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] According to a specific embodiment of the present invention is figure 1 The shown descrambling device 100 includes a descrambling module 11 and a one time programmable module 12 . In practical applications, the descrambling device 100 can be integrated into various electronic devices (such as a TV system or a TV set-top box) that require descrambling, and can also exist independently.

[0019] The descrambling module 11 with multiple descrambling modes is used for descrambling an input data stream, and determines which mode should be used to descramble the input data stream according to the state of the one-time programmable module 12 . For example, the descrambling module 11 can determine according to the state of the one-time programmable module 12 whether to perform the descrambling procedure, the number of keys that can be accepted, which group of keys should be used in the descrambling procedure, or whether the descrambling procedure should be performed. Which des...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a descrambling device comprising a descrambling module and a one-time programmable module. The descrambling module is used for descrambling an input data flow. When the one-time programmable module is in a first state, the descrambling module descrambles the input data flow in a first mode. When the one-time programmable module is in a second state which is different from the first state, the descrambling module descrambles the input data flow in a second mode.

Description

technical field [0001] The present invention is related to descrambling techniques. Background technique [0002] In order to protect their own rights and interests, TV program providers usually scramble the content of pay TV channels, and only provide key information required by the descrambling process to paid users. TV program providers in different regions may adopt different types and degrees of scrambling mechanisms. Digital video broadcasting common scrambling algorithm (DVB-CSA), which is widely used at present, specifies that two bits must be set in the file header of each image block to mark the image Whether the image content contained in the block has been scrambled, and which set of keys should be used to descramble. [0003] In order to strengthen the degree of protection, TV operators in some regions alternately use several keys to scramble video blocks. For example, the first 100 video blocks in the same video stream must be descrambled with the first key. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/4405
Inventor 曹定邦
Owner MEDIATEK INC