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

In-hand key digital television signal encryption system

A technology of digital TV signal and encryption system, applied in the direction of analog security/charging system, etc., can solve the problems of high cost of digital TV program signal encryption and decryption method, difficult technical development, etc., and achieves low technical development difficulty, low cost, The effect of improving reliability

Active Publication Date: 2010-08-11
KONKA GROUP
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, in view of the above shortcomings such as high cost of encryption and decryption methods for digital TV program signals, and great difficulty in technology development, it is necessary to develop a simple, low-cost digital TV system program encryption system and method

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
  • In-hand key digital television signal encryption system
  • In-hand key digital television signal encryption system
  • In-hand key digital television signal encryption system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Figure 1 shows the basic coding format of digital TV signals during transmission, and is also the basic transmission coding format of general digital signals. In this encoding format, there are three main components including a synchronization header, transmission data, and an end code. The synchronization header and the end code are collectively called a frame synchronization code, or a synchronization bit. This kind of data structure is called "frame", and digital signals are transmitted frame by frame. The synchronization header and the end code are composed of several bits respectively. Generally, the more bits of the frame, that is, the longer the frame length, and the shorter the interval between two adjacent frames, the bit bits of the synchronization header and the end code are required The number is also more. If the interval between two adjacent frames is very long, only one or two bits of the sync header and end code are sufficient. The length of the frame ...

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 discloses a kind of associating key digital TV signal encrypting system, its details are: encrypting the original digital TV signals, managing user data and encrypting digital TV signals and transmitting data signals by transmitting end; processing data information and de-encrypting the encrypted digital TV signals through key by receiving end. The encrypting method includes: dynamically memory digital TV signal and compare it with original digital TV signal to detect the synchronous head and end code of the digital signal and then replace the original synchronous head by the new one. Its procedures are:A1)dynamically memorizing original digital TV signal through shift memorizer; A2)using position comparator to detect original digital TV signal by each frame; A3)taking encrypted data as new digital TV signal's synchronization head and end code to replace original digital TV signal's synchronization head and end code.

Description

technical field [0001] The invention relates to a digital television system, in particular to an encryption system of a digital television system. Background technique [0002] At present, my country's digital TV programs are preparing to start broadcasting, and digital TV will replace analog TV. However, the technical problems of program signal encryption and conditional access that plague the development of digital TV in my country have not been well resolved. [0003] Digital TV signals are transmitted in the form of data frames, and the transmission bit rate is very high, especially for high-definition digital TV (HDTV), the bit rate is as high as 20MPS or more, so the encryption and decryption of signals generally require RISC- CPU (such as: ARM-CPU) or SOC and other high-speed data processing devices or circuits to achieve. The use of these devices also requires embedded operating system software, and middleware and data processing software to support. Therefore, the...

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): H04N7/16
Inventor 陶显芳
Owner KONKA GROUP