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Cable TV control technology added with de-interference

A kind of cable television and control technology technology, applied in the direction of analog security/charging system, etc., can solve the problem of unauthorized connection, and achieve the effect of eliminating unauthorized connection, good security and high cost performance.

Inactive Publication Date: 2003-03-26
梁光海
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent completely overcomes the deficiencies of various previous patents, and truly solves the problems of stealthy signal connection, private connection and random connection, and reliable, safe and effective addressing, so as to complete the conditional reception of cable TV and facilitate the management of cable TV charges

Method used

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  • Cable TV control technology added with de-interference
  • Cable TV control technology added with de-interference
  • Cable TV control technology added with de-interference

Examples

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Embodiment Construction

[0028] The descrambling controller at the back end of the present invention is located outdoors of the controlled single user and constitutes a collective device for performing group decoding on the controlled 2-24 user viewing radio frequency signals, and is authorized and addressed by the front-end computer in the front-end scrambling device The control provides descrambling recovery to recover the attenuated compressed sync header.

[0029] Such as figure 1 , 2 The present invention is made up of two major parts of the scrambling device of front-end and the descrambling controller of back-end, and the scrambling device of front-end is made up of synchronous scrambling / frame machine, data encryption processor, single-chip microcomputer and adjacent frequency modulator, is characterized in that: The video signal of each channel is corrected into a unified synchronous and in-phase signal after the line and field correction and synchronization of the signal by the frame synchr...

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Abstract

The technique comprises the adding disturbance unit and the subtracting disturbance controller. With being carried out the synchronization correction of the line and field through synchronous adding disturbance/frame unit as well as the synchronous adding disturbance processing through the data encryption processor, the video signal is divided into two routes. With being through attenuation, compress and phase inversion, one route of the signal is sent to the adjacent frequency modulator to be mixed as the cable TV signal entering into the cable TV network, then to user's subtracting disturbance controller. With being demodulated by the single chip, the line and field compound signal in other route is sent to the adjacent frequency modulator through the mixer going to the user's substracting disturbance controller.

Description

Technical field: [0001] The invention relates to the comprehensive application of cable TV transmission technology, TV scrambling and descrambling technology, single-chip microcomputer technology, computer technology, modern data transmission technology and high-frequency microelectronic technology, especially a cable TV scrambling and descrambling control technology. Background technique: [0002] In recent years, there are two main types of CATV conditional access system technologies: [0003] 1. The front end is not scrambled and the end is turned off or scrambled. Addressable charging system [0004] The system uses addressable branches and distributors to control the opening, closing or terminal scrambling of cable TV signals. This scheme is mainly composed of two parts: the charging control center and the addressable branch distributor. The charging control center mainly completes the input and management of user information and payment information, and encrypts these...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/16
Inventor 梁光海
Owner 梁光海