CN2588702Y - Terminal monitoring controller - Google Patents
Terminal monitoring controller Download PDFInfo
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- CN2588702Y CN2588702Y CN 02294151 CN02294151U CN2588702Y CN 2588702 Y CN2588702 Y CN 2588702Y CN 02294151 CN02294151 CN 02294151 CN 02294151 U CN02294151 U CN 02294151U CN 2588702 Y CN2588702 Y CN 2588702Y
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Abstract
The utility model provides a terminal monitoring device which is used for a cable TV network monitoring system. The utility model comprises an input unit of a TV signal, an identifying unit of identification code and a monitoring processing unit, wherein, the input unit of a TV signal is used for inputting the cable TV signal of a monitored channel; the identifying unit of identification code is used for identifying the identification code in the cable TV signal; according to the state that the cable TV signal is input by the input unit of a signal, such as the strength of a video signal, etc. and the identification situation to the identification code, the monitoring processing unit is used for determining operation to the monitored channel, such as the abnormal situation is reported to the monitoring administration center of the cable TV network monitoring system by a communications unit, the channel which is inserted with an illegal program is cut off by a switching circuit, the monitored channel is scrambled by a scrambling circuit of the video signal, etc. The terminal monitoring device of the utility model is generally arranged behind a trunk amplifier or an amplifier for users on the cable TV network.
Description
Technical field of the present utility model
The utility model relates to cable television appliances, specifically, relates to terminal monitoring device used in the cable television network monitoring system.
Background technology of the present utility model
Modern society, broadcasting and TV have become people's central indispensable pith of living.The mode of television network broadcast comprises wireless, wired and the satellite television net.The wired broadcasting TV transmission network is the important component part of broadcasting and television network.The wired broadcasting television network has all been set up in national most of areas at present.In this case, content and running technology index that cable television network broadcasts are carried out remote monitoring, help safeguarding the play quality of wired broadcasting TV and carry out the broadcast television transmissions safety management of network, and the broadcast of bootlegging such as monitoring piracy or the illegal program of handling and improve the ability of handling accident.
Under this background, cable television network monitoring system has been proposed.Basic demand to cable television network monitoring system is can monitor in real time the broadcasting signal of wired broadcasting TV network, and when unusual circumstance when situation such as harmful interference signal or normal broadcast singal interruption occurring, the position that takes place of estimate of situation exactly, and take measures areput.
In cable television network monitoring system, the terminal monitoring device is one of them important part.The major function of terminal monitoring device is the identification code by front end identification code inserter insertion of quick identification in vision signal, and then in time find the circuit abnormal conditions, for example occur illegal signals or circuit broken string etc. in the circuit, and when finding these abnormal conditions, in time deal with and to the supervision and management center report of cable television network monitoring system.
At present, designer of the present utility model does not see the product of the terminal monitoring device in cable television network monitoring system and relevant technology report as yet.
The utility model content
The utility model purpose is to propose a kind of terminal monitoring device that is used for cable television network monitoring system.
Comprise according to the terminal monitoring device that is used for cable television network monitoring system of the present utility model: signal input unit is used to import the cable TV signal of monitored channel; The identification code recognition unit is used for discerning the identification code of cable TV signal; The monitoring processing unit is used for the definite operation to institute's monitor channel of state according to the cable TV signal of signal input unit input.
In one embodiment of the present invention, the terminal monitoring device also comprises communication unit, and above-mentioned monitoring processing unit is by the supervision and management center report abnormal conditions of this communication unit to cable television network monitoring system.In addition, the terminal monitoring device also can comprise switching circuit, and above-mentioned monitoring processing unit cuts off the TV signal of the channel that is inserted with illegal programs by this switching circuit.In addition, the terminal monitoring device also can comprise the vision signal scrambling circuit, and above-mentioned monitoring processing unit is implemented scrambling by this vision signal scrambling circuit to institute's monitor channel.
By below in conjunction with the description of the drawings, those skilled in the art will understand feature and advantage of the present utility model better.
Brief description of drawings
Fig. 1 is the structural representation of terminal monitoring device of the present utility model.
Concrete execution mode
Fig. 1 has shown a kind of embodiment preferred of terminal monitoring device of the present utility model.This terminal monitoring device mainly comprises: signal input unit 1, monitoring processing unit 2 and identification code recognition unit 3.
Monitoring processing unit 2 comprises CPU (CPU) 21, can detect its signal level (signal strength signal intensity) by CPU 21 on the one hand from the vision signal of TV signal demodulator 13 outputs, on the other hand, CPU 21 control TV signal demodulators 13 make its cycling jump to each monitor channel.This channel video signal is sent to identification code recognition unit 3, and CPU 21 control identification code recognition units 3 detect in the vision signal whether have legal identification code.
In an embodiment shown in Figure 1, the detection of signal level realizes by analog-digital converter (ADC) 22.Specifically, the vision signal (analog signal) of TV signal demodulator 13 output inputs among the ADC 22, by ADC 22 signal level of this analog signal is converted to digital signal level, is detected by 21 pairs of these digital levels of CPU then.CPU 21 is by the detection to digital level, and compares with the standard television signal level, analyzes the propagation quality of cable TV signal.System parameterss such as standard signal level are stored in the memory 23, are read by CPU 21.In a kind of preferred embodiment, memory 23 can be EEPROM, to avoid obliterated data when the power down.In addition, can also detect synchronizing signal, will use video synchronous separator for this reason, can adopt the Video Sync Separator Chip of the existing special use that can buy from market.This video synchronous separator can be extracted information lock in time from vision signal, comprise after compound and vertical synchronizing signal, the chrominance pulse information along time and strange/even field (field).CPU judges having or not of video synchronization signal in conjunction with these several indexs.
In the above-described embodiment, monitoring processing unit 2 also comprises switch element 24.In one embodiment, switch element 24 turn-offs relay by high frequency and constitutes, its effect is, be input to the high frequency shutoff relay from the cable TV signal of branch circuit 11 outputs, because relay is in normally off, so even under the idle state of terminal, also can not influence output to the cable TV signal of rear end.When CPU 21 according to identification code recognition unit 3 (hereinafter will describe) to it to institute's monitor channel in the identification carried out of the identification code that comprises of vision signal, when having judged illegal signals and having sneaked into this channel, the user of level promptly sends control signal the high frequency shutoff relay of switch element 24 turn-offed, so that can not receive illegal TV programme behind the monitor terminal.Certainly, for example also can using, transistor switching device (for example metal-oxide-semiconductor) replaces above-mentioned high frequency to turn-off relay as switch element 24.
In the terminal monitoring device, can be provided with and automatically shut down and manually turn-off dual mode.Manually shutoff is exactly can be sent from front end by administrative staff to turn-off instruction with switch element 24 shutoffs.And automatically shut down under the mode, then as described above, after the CPU in the terminal monitoring device 21 finds to have illegal signals to insert, send control signal switch element 24 is turn-offed.
On the other hand, monitoring processing unit 2 can also comprise composite video signal (comprising vision signal and audio signal) scrambling circuit 25.After CPU 21 finds to have illegal signals to insert in the channel of being monitored, promptly send control command, make 25 pairs of this channel output of vision signal scrambling circuit co-channel interference signal, thereby disturb its video synchronization signal, the user's of subordinate television set just can't normally have been watched the program of this channel like this.Vision signal scrambling circuit 25 can adopt conventional scrambling circuit technology to realize, for example uses commercially available on the market chip.For example, can adopt the radio television signal signal scrambling technique, interference CF signal that departs from vision carrier frequency 2.5MHz of stack on by the vision carrier frequency of scrambled channel, thereby the accompanying sound intermediate frequency signal that produces in original vision carrier frequency signal and the demodulating process is all caused interference, picture-and-sound is produced the effect of scrambling.
Identification code recognition unit 3 is used for being identified in the identification code that the vision signal of institute's monitor channel adds.This identification code is to be inserted in the capable any delegation of the 6-21 of vision signal vertical blanking period by the identification code inserter that is arranged in cable TV network first order trunk portion in the cable television network monitoring system.Identification code recognition unit 3 can adopt commercially available on the market conventional chip, for example SAA5284 equally.The various level of the identification code information that it is detected to CPU output representative compare judgement by CPU, thereby finish the function with error correction and identification code signature authentication of detecting of identification code.Identification code detects error correction and mainly finishes the correct identification of inserting identification code.Whether the identification code signature authentication then detects the contained key of this insertion identification code correct.
In a kind of embodiment of the present utility model, monitoring processing unit 2 also comprises communication unit 26, is used to make the supervision and management center of terminal monitoring device and cable TV network prison system to communicate.The main purpose of this communication is can in time report to the police to supervision and management center when the terminal monitoring device is found to have illegal signals to sneak into cable television channels, and after TV signal is normal, recover to the supervision and management center report signal, the terminal monitoring device find level cross low or disconnection fault etc. in time report to the police to supervision and management center, recover to the supervision and management center report signal in the normal back of TV signal.
The communication of monitor terminal and supervision and management center can be passed through three kinds of optional networks: PSTN network, GSM network, hfc plant.Correspondingly, communication unit 26 is made of the communication module that can communicate by letter in these three kinds of networks respectively.
Specifically, when the terminal monitoring device was mutual by HFC (coaxial cable/fiber mix net) network and supervision and management center, communication unit 26 comprised frequency shift keying (FSK) modulator-demodulator.In this case, the data-modulated that CPU 21 control FSK modulators will transmit is transmitted to certain carrier wave then.When the terminal monitoring device received data, the data demodulates that CPU 21 control fsk demodulators will receive was a Digital Signal Processing.When the terminal monitoring device was mutual by GSM network and supervision and management center, then communication unit 26 comprised GSM reflector and receiver, carries out alternately in the mode that short message sends.When the terminal monitoring device is mutual by PSTN network and supervision and management center, be the mode of utilizing dial-up.Monitor terminal is according to cable television network monitoring system user's requirement, as long as possess wherein a kind of communication modes.The PSTN communication module for example can use TDK73M2901 modem chip and serial interface circuit; The GSM communication module uses for example ZXGM18 series gsm module and peripheral 3.8V voltage stabilizing circuit and serial interface circuit; CableModem communication module in the HFC communication module for example can use, and the AD9835 chip carries out the FSK modulation, the MC3356 chip carries out FSK demodulation and serial interface circuit.The CableModem communication module uses the FSK modulation chip will send data-modulated to certain frequency.Is digital signal by the FSK demodulation chip with the data demodulates that receives for the data that receive.Wherein Tiao Zhi frequency can be by the front-end control of supervision and management center, and promptly the communication frequency is adjustable.
In another scheme of the present utility model, monitoring processing unit 2 also comprises ambient temperature, moisture measurement unit 28,29, is used for the residing environmental condition of measuring terminals supervising device.This temperature measurement unit 28, moisture measurement unit 29 can adopt conventional temperature sensor, humidity sensor to realize.They can send temperature, the humidity of measuring to CPU 21 in the mode of the signal of telecommunication.CPU 21 determines the residing environmental condition of terminal monitoring device according to these signals, and can send relevant information to supervision and management center by above-mentioned communication unit 26.
In a kind of preferred embodiment, the control circuit of monitor terminal has hardware watchdog and/or software watchdog, and they all are used to prevent program fleet, can make the monitor terminal operation more stable like this.Can make the monitor terminal operation more stable like this.Hardware or software watchdog are routine techniquess.Program just often CPU is carried out timing reset to house dog, if program fleet, house dog can not get resetting within a certain period of time, and then house dog can reset to CPU, thereby the assurance program is normally moved.
In sum, terminal monitoring device of the present utility model detects the legitimacy of cable TV signal by the identification of identification code.Monitor terminal also can be in time to supervision and management center report corresponding information when broken string or certain channel no signal and signal recovery appear in wired TV network.In addition, the terminal monitoring device can detect the multinomial technical parameter on the cable TV network, for example signal strength signal intensity, temperature, humidity etc., and these information are sent back supervision and management center.The terminal monitoring device with can carry out information interaction by PSTN network, GSM network, hfc plant thrin and supervision and management center.
Although described the utility model with embodiment with reference to the accompanying drawings, those skilled in the art obviously can carry out various modifications to it and substitute on the basis that does not break away from spirit and scope of the present utility model.Therefore, protection range of the present utility model is limited by appended claims.
Claims (10)
1. be used for the terminal monitoring device of cable television network monitoring system, comprise:
The TV signal input unit is used to import cable TV signal;
The identification code recognition unit is used for discerning the identification code of the cable TV signal that described signal input unit imports; With
The monitoring processing unit detects the cable TV signal state that described signal input unit is imported, and according to the state of the cable TV signal that is detected and/or the recognition result of identification code recognition unit, controls the output of described cable TV signal.
2. terminal monitoring device according to claim 1 is characterized in that, described signal input unit comprises:
Branch circuit, the cable TV signal that is used for being imported is exported respectively; With
The TV signal demodulator is used for and will exports after the cable TV signal demodulation.
3. terminal monitoring device according to claim 2, it is characterized in that, also comprise analog digital converting unit, the vision signal after the described TV signal demodulator input demodulation, after analog/digital conversion, export the monitoring processing unit to, to detect TV signal intensity.
4. terminal monitoring device according to claim 1 is characterized in that, described monitoring processing unit comprises:
CPU, the cable TV signal state that described signal input unit is imported detects, and the transmission of the TV signal of control institute monitor channel; With
Memory is used to store the reference data of terminal monitoring device.
5. terminal monitoring device according to claim 4 is characterized in that, described terminal monitoring device also comprises:
Switch element, the policer operation order according to described monitoring processing unit turns on and off the propagation of institute's monitor channel TV signal; With
The vision signal scrambling unit is according to the policer operation order of described monitoring processing unit, to the TV signal scrambling of institute's monitor channel.
6. according to each described terminal monitoring device of claim 1-5, it is characterized in that, also comprise communication unit, described monitoring processing unit by this communication unit to the supervision and management center of cable television network monitoring system report abnormal conditions with receive the monitored instruction of described cable TV network.
7. terminal monitoring device according to claim 6 is characterized in that, also comprises the environmental condition detecting unit, is used to detect the external environmental condition of described terminal monitoring device, and testing result is inputed to described monitoring processing unit.
8. terminal monitoring device according to claim 7 is characterized in that, described environmental condition detecting unit comprises temperature detecting unit and Humidity Detection unit.
9. terminal monitoring device according to claim 6 is characterized in that, also comprises watchdog unit, is used to prevent program fleet.
10. terminal monitoring device according to claim 9 is characterized in that, described watchdog unit is watchdog circuit or software watchdog.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02294151 CN2588702Y (en) | 2002-12-27 | 2002-12-27 | Terminal monitoring controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02294151 CN2588702Y (en) | 2002-12-27 | 2002-12-27 | Terminal monitoring controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2588702Y true CN2588702Y (en) | 2003-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02294151 Expired - Fee Related CN2588702Y (en) | 2002-12-27 | 2002-12-27 | Terminal monitoring controller |
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| CN (1) | CN2588702Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102300123A (en) * | 2011-09-20 | 2011-12-28 | 北京鹏润鸿途科技有限公司 | Method and device for monitoring IPTV (Internet Protocol Television) channels |
| CN102710964A (en) * | 2012-05-23 | 2012-10-03 | 成都东银信息技术股份有限公司 | Monitoring device and method capable of avoiding illegal signal attack |
| CN101739779B (en) * | 2008-11-21 | 2013-04-17 | 康佳集团股份有限公司 | Method and equipment for indicating digital signal strength |
| CN104244090A (en) * | 2014-09-04 | 2014-12-24 | 四川迪佳通电子有限公司 | Program authorization method and system |
-
2002
- 2002-12-27 CN CN 02294151 patent/CN2588702Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101739779B (en) * | 2008-11-21 | 2013-04-17 | 康佳集团股份有限公司 | Method and equipment for indicating digital signal strength |
| CN102300123A (en) * | 2011-09-20 | 2011-12-28 | 北京鹏润鸿途科技有限公司 | Method and device for monitoring IPTV (Internet Protocol Television) channels |
| CN102710964A (en) * | 2012-05-23 | 2012-10-03 | 成都东银信息技术股份有限公司 | Monitoring device and method capable of avoiding illegal signal attack |
| CN104244090A (en) * | 2014-09-04 | 2014-12-24 | 四川迪佳通电子有限公司 | Program authorization method and system |
| CN104244090B (en) * | 2014-09-04 | 2018-05-01 | 四川迪佳通电子有限公司 | A kind of program authorization method and system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |