CN1170434C - Security monitor system for cable TV network - Google Patents
Security monitor system for cable TV network Download PDFInfo
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- CN1170434C CN1170434C CNB021381461A CN02138146A CN1170434C CN 1170434 C CN1170434 C CN 1170434C CN B021381461 A CNB021381461 A CN B021381461A CN 02138146 A CN02138146 A CN 02138146A CN 1170434 C CN1170434 C CN 1170434C
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Abstract
The present invention relates to a safety monitoring system for a cable television network. The present invention comprises a station terminal device and a user network terminal device, wherein the station terminal device is composed of a mixer and a cable television emitter; the user network terminal device is composed of trunk amplifiers, a plurality of user amplifiers, a plurality of intelligent branch distributors and user terminal televisions; the input of the mixer in the station terminal device is accessed with various paths of cable television signals, and the output is connected with the input of the cable television emitter; the output of the cable television emitter is connected with the input of the trunk amplifiers in the user network terminal device; the output of the trunk amplifiers is connected with the input of the user amplifiers respectively corresponding to the trunk amplifiers; the output of the user amplifiers is connected with the user terminal televisions respectively corresponding to the user amplifiers and through the intelligent branch distributors respectively corresponding to the user amplifiers; the input of the mixer in the station terminal device is connected with an encoder transmitting cryptographic digital sync signals through an FM broadcasting modulator. The system of the present invention has the functions of quick construction, high performance-price ratio, strong illegal inter cut preventing performance, signal stealthy connection prevention, prevention of users' disorder pulling and disorder connection; the present invention truly perfects the double purposes of intelligent fee management and network security management.
Description
Technical field
The present invention relates to a kind of safety monitoring system of cable TV network.
Background technology
Cable TV network distributes very wide in various places, spread all over the rural area, city, for such one huge and safety management of network that disperse is a very complicated and difficult job, particularly some illegal organizations reach its insidious political motives, bootlegging broadcasting and intercut illegal TV programme in cable television network, cause very bad political fallout, up to the present, also do not have a kind of good cable TV network that can prevent by bootlegging broadcasting and the safety monitoring system that intercuts.
Summary of the invention
Purpose of the present invention is exactly in order to address the above problem, and provides a kind of cable TV network that can effectively prevent by bootlegging broadcasting and the security monitor system for cable TV network that intercuts.
Technical solution of the present invention:
A kind of security monitor system for cable TV network, it includes cable TV station's sending ending equipment and subscriber network terminal equipment, wherein cable TV station's sending ending equipment is made up of blender and cable TV reflector, subscriber network terminal equipment is by each trunk amplifier, a plurality of subscriber's amplifiers and a plurality of intelligent branch distributor and user terminal television set are formed, blender input in cable TV station's sending ending equipment inserts each road cable TV signal, its output is connected to the input of line video transmitter, the output of cable TV reflector connects each the trunk amplifier input in the subscriber network terminal equipment, the output of each trunk amplifier connects the input of each self-corresponding a plurality of subscriber's amplifier, the output that it is characterized in that each subscriber's amplifier connects each respective user terminal televisions by each self-corresponding a plurality of intelligent branch distributor, the input of the blender in cable TV station's sending ending equipment receives and sends the encoder of enciphered digital synchronizing signal by the FM broadcasting modulator, this encoder constantly sends the detection signal sign indicating number, and with legal broadcast program channel transmission together, each user side has intelligent branch distributor, control each tame TV signal respectively, utilization single-chip microcomputer wherein constantly detected the code signal of cable TV station's transmitting terminal at 24 hours, detect once each second, in case detect less than this signal, all automatic scrambling of the intelligent branch distributor of user side or cut-off signals, even detect the code signal of cable TV station's transmitting terminal after a period of time again, the intelligent branch distributor of user side still keeps scrambled state, to prevent bootlegging broadcasting, spot enters.
Security monitor system for cable TV network of the present invention is that the transmitting terminal in cable TV station is provided with special-purpose coding transmitter and constantly sends the detection signal sign indicating number, and with legal broadcast program channel transmission together, vast user side has special-purpose intelligent branch distributor, intelligent branch distributor generally can control two to 16 families other, utilization single-chip microcomputer wherein constantly detected the code signal of you at 24 hours, detect once each second, in case detect for ten seconds less than this signal, the intelligent branch distributor of terminal is scrambling automatically all, signal can not normally teleview, even detect the code signal of you after 10 seconds again, the intelligent branch distributor of terminal still keeps scrambled state (to be used for preventing bootlegging broadcasting, spot), fix a breakdown after the you encoder sends and opens signal Deng the maintainer, could recover TV reception.Like this, no matter cable TV network is disconnected is wherein intercutted or bootlegging broadcasting, and the following network of this breakpoint all enters the shutoff scrambled state, has prevented the political conspiracy of illegal organization effectively.And can know immediately and can accurately locate when wired TV network in case because of natural cause (as hazard weather) or human factor (as stealing network appliance, field constructions etc. such as cable, amplifier) cause disconnection fault, you, be convenient to quick repairing.The present invention can prevent effectively that the disabled user from stealing and connect TV programme, because connecing method, various robbers all can cause network point to disconnect in short-term, and at this moment system of the present invention will detect and in time send and turn-off the scrambled signals order and in time report for repairment, is beneficial to find steal connect the family.System of the present invention has quick construction, cost performance height, anti-strong, the anti-signal of ability that illegally intercuts is stolen and connect and anti-user's private is drawn and function such as disorderly connect, and the dual purpose of real perfect intelligent toll administration and network security management has embodied the effect of achieving many things at one stroke.
Description of drawings
Fig. 1 is a theory structure schematic diagram of the present invention.
Fig. 2 is the electrical schematic diagram of encoder of the present invention.
Embodiment
As Fig. 1, security monitor system for cable TV network of the present invention, it includes cable TV station's sending ending equipment and subscriber network terminal equipment, wherein you equipment is made up of blender and cable TV reflector, subscriber network terminal equipment is by each trunk amplifier, a plurality of subscriber's amplifiers and a plurality of intelligent branch distributor and user terminal television set are formed, blender input in the you equipment inserts each road cable TV signal, its output is connected to the input of line video transmitter, the output of cable TV reflector connects each the trunk amplifier input in the subscriber network terminal equipment, the output of each trunk amplifier connects the input of each self-corresponding a plurality of subscriber's amplifier, characteristics of the present invention are, the output of each subscriber's amplifier connects each respective user terminal televisions by each self-corresponding a plurality of intelligent branch distributor, (it is existing commercially available prod by the FM broadcasting modulator in the input of the blender in you equipment, model can be FM-2000S) receive and send the encoder (it also is existing commercially available prod, and model can be SD-2000A) of enciphered digital synchronizing signal.
Encoder of the present invention utilizes a certain idle frequency in the FM broadcasting frequency range (88-108MHZ) constantly to send enciphered digital synchronizing signal (as double audio coding signal, FSK code signal etc.) to the cable TV reflector, it together enters each intelligent branch distributor in each subscriber network terminal equipment with each road cable TV signal, single-chip microcomputer in each intelligent branch distributor only need increase corresponding software, can discern the enciphered digital synchronizing signal, and this synchronizing signal is not because the frequency range difference then can form interference to cable TV signal.
The encoder of system of the present invention can be by single-chip microcomputer, the encrypted code generator, memory, two audio-frequency generators, the FSK code generator, audio power amplifier is formed, as Fig. 2, the serial line interface end of single-chip microcomputer (model can be 8031) connects control PC (i.e. Chang Yong common computer) in the you equipment by the R232 interface, PC is in order to the operating state of control single chip computer, the data/address bus of single-chip microcomputer links to each other with memory (model can be 2864), single-chip microcomputer input termination encrypted code generator (model can be 74LS163), its output termination double-tone is generator (model can be 5087) and FSK code generator (model can be FX469) frequently, the output of two audio-frequency generators and FSK code generator connects audio power amplifier (model can be LM386), and the output of audio power amplifier connects the input of FM broadcasting modulator by output interface.
Of the present inventionly anti-intercut principle and be, be provided with encoding device at you, the scrambled digital signal of its input is input to frequency-modulated broadcast transmitter or modulator, utilize a certain frequency (can be provided with voluntarily) of FM broadcasting to broadcast the digital synchronization signal of encryption, 24 hours uninterrupted, this synchronizing signal adds in the broadcast television channel behind the mixing apparatus of cable TV station and together transfers out, this cipher mode can be set up on their own and be changed by the you management system, and any program that intercuts does not have the digital synchronization signal of encryption, thereby has distinguished legal broadcast and illegally intercut.At user side, the detection that the present invention utilizes demodulator in terminal use's the intelligent branch distributor and single-chip microcomputer to finish the digital synchronization signal that you is sent in original intelligent toll system, in case detect digital synchronization signal at a time less than you, think that then transmission line is artificially disconnected or disconnection naturally, comprise and intercut into illegal TV signal, at this moment intelligent branch distributor can send alarm signal and turn-off rating from its user who is administered of trend, allow the user dial repair call to you, be beneficial to the you administrative staff and in time locate the site of an accident, and handle with the fastest speed scene of rushing to, dispose, the you encoder sends the rating that control code is recovered its user that administers automatically.No matter cable television network disconnects from main line and intercuts or disconnect spot from the subscriber's amplifier end as can be seen from Figure 1, the intelligent branch distributor of in its administrative area all can send alarm signal or turn-off the rating program to the user simultaneously, no matter which kind of technological means illegal clique takes to reach the purpose that it illegally intercuts.
The concrete course of work of the present invention is as follows, when certain administrative area intercut or natural disconnection fault after, the user can make a phone call to report for repairment, at this moment the you master server can automatic startup report receiving system software for repairment, this running software is on voice platform, system accepts fault message automatically, and can on computer screen, demonstrate the information such as address code of guilty culprit location, position, administrative staff and subscriber equipment, can start GSM network or telephone network simultaneously and be dealt with problems in the maintenance personal scene of arriving in the very nick of time by mobile phone or the landline telephone of calling out relevant maintenance personal.
Claims (2)
1, a kind of security monitor system for cable TV network, it includes cable TV station's sending ending equipment and subscriber network terminal equipment, wherein cable TV station's sending ending equipment is made up of blender and cable TV reflector, subscriber network terminal equipment is by each trunk amplifier, a plurality of subscriber's amplifiers and a plurality of intelligent branch distributor and user terminal television set are formed, blender input in cable TV station's sending ending equipment inserts each road cable TV signal, its output is connected to the input of line video transmitter, the output of cable TV reflector connects each the trunk amplifier input in the subscriber network terminal equipment, the output of each trunk amplifier connects the input of each self-corresponding a plurality of subscriber's amplifier, the output that it is characterized in that each subscriber's amplifier connects each respective user terminal televisions by each self-corresponding a plurality of intelligent branch distributor, the input of the blender in cable TV station's sending ending equipment receives and sends the encoder of enciphered digital synchronizing signal by the FM broadcasting modulator, this encoder constantly sends the detection signal sign indicating number, and with legal broadcast program channel transmission together, each user side has intelligent branch distributor, control each tame TV signal respectively, utilization single-chip microcomputer wherein constantly detected the code signal of cable TV station's transmitting terminal at 24 hours, detect once each second, in case detect less than this signal, all automatic scrambling of the intelligent branch distributor of user side or cut-off signals, even detect the code signal of cable TV station's transmitting terminal after a period of time again, the intelligent branch distributor of user side still keeps scrambled state, to prevent bootlegging broadcasting, spot enters.
2, by the described security monitor system for cable TV network of claim 1, it is characterized in that described encoder is by single-chip microcomputer, the encrypted code generator, memory, two audio-frequency generators, the FSK code generator, audio power amplifier is formed, the serial line interface end of single-chip microcomputer connects control PC in the you equipment by the R232 interface, the data/address bus of single-chip microcomputer links to each other with memory, single-chip microcomputer input termination encrypted code generator, its output termination double-tone is generator and FSK code generator frequently, the output of two audio-frequency generators and FSK code generator connects audio power amplifier, and the output of audio power amplifier connects the input of FM broadcasting modulator by output interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021381461A CN1170434C (en) | 2002-08-21 | 2002-08-21 | Security monitor system for cable TV network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021381461A CN1170434C (en) | 2002-08-21 | 2002-08-21 | Security monitor system for cable TV network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1396771A CN1396771A (en) | 2003-02-12 |
| CN1170434C true CN1170434C (en) | 2004-10-06 |
Family
ID=4749312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021381461A Expired - Fee Related CN1170434C (en) | 2002-08-21 | 2002-08-21 | Security monitor system for cable TV network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1170434C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101982980A (en) * | 2010-09-26 | 2011-03-02 | 成都新光微波工程有限责任公司 | Intelligent real-time monitoring integrated platform for digital television transmitters |
| CN103078694B (en) * | 2011-10-25 | 2015-12-02 | 中国传媒大学 | The method and system of guarding against illegal inter-cut in a kind of synchronous frequency-modulating broadcast |
| TWI502994B (en) * | 2012-03-05 | 2015-10-01 | Chen Fei Chang | Cable TV system theft detection method |
| WO2013155646A1 (en) * | 2012-04-19 | 2013-10-24 | Chang Chen-Fei | Detecting and informing device for access without authorization in cable television system |
| US9774459B2 (en) * | 2012-06-22 | 2017-09-26 | Sensormatic Electronics, LLC | Security system and method using wireless adapters and PoE cameras |
| CN105407363A (en) * | 2015-11-17 | 2016-03-16 | 深圳Tcl数字技术有限公司 | Television anti-theft monitoring method and device |
-
2002
- 2002-08-21 CN CNB021381461A patent/CN1170434C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1396771A (en) | 2003-02-12 |
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