CN1411276A - Method of integrated control of descrambler terminal primary and secondary machine in descrambler added system - Google Patents
Method of integrated control of descrambler terminal primary and secondary machine in descrambler added system Download PDFInfo
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- CN1411276A CN1411276A CN 01127270 CN01127270A CN1411276A CN 1411276 A CN1411276 A CN 1411276A CN 01127270 CN01127270 CN 01127270 CN 01127270 A CN01127270 A CN 01127270A CN 1411276 A CN1411276 A CN 1411276A
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- machine tool
- handset
- command code
- descrambling
- composite aircraft
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Abstract
This invention discloses an interference-relief terminal sub master machines joint control method in interference addition and relief system in which the front end interference addition master machine controls the interference-relief to the rear user master and sub machines, the sub machine has an independent user number having same authorized functions with the master and receiving authorized data from network, the master sends interference relief order code to the sub, realizing signal receiving. This method enables end user to spread selecting different programs for watching or playing and the front machine chamber executes interference relief control to the end use sub and master machines authorized by the front before connecting to the rear sub machine by themselves and the sub should by authorized by the front and the master at the same time, can it receive wire TV channel signals.
Description
Technical field
The addressable that the present invention relates to a kind of cable TV adds the method for descrambling, especially a kind of method of the descrambler descrambles for front end scrambling, terminal descrambling.
Background technology
The descrambling that adds to cable TV has several different methods at present, one of them method is that the same head of multi-channel video signal is corrected into synchronously also homophase with the method for time base correction, then each channel signals is carried out synchronous head compression scrambling, then pass through descrambling at user side, simultaneously channel signals is carried out synchronous head and recover, realize the toll administration of cable TV.If its weak point terminal temperature difference connects handset more voluntarily, TV signal is shared, then headend room can not be controlled.
Summary of the invention
The object of the present invention is to provide a kind ofly to add the descrambling terminal temperature difference, control the mandate of terminal temperature difference simultaneously, realize the joint control of front end composite aircraft to its handset by headend room.
Purpose of the present invention is achieved through the following technical solutions:
The method of descrambler terminal composite aircraft joint control in a kind of interference blanking system, front end scrambling host computer control is carried out descrambling to the machine tool and the handset of terminal temperature difference, handset has independent user number, have the authorization function identical with machine tool, can from network, receive authorization data, send the descrambling command code by machine tool, realize that signal receives;
Machine tool wherein:
Machine tool can send " descrambling command code " from the composite aircraft interface and give handset, and this function can then not send " descrambling command code " by front end scrambling host computer control when closing the composite aircraft function;
The numerical value of " descrambling command code " is given when programming, also can change as requested;
Handset wherein:
Handset is only assert one predetermined " descrambling command code ", " the descrambling command code " of the authorization data that receives as there not being machine tool to send here, and authorization data can not come into force;
" the descrambling command code " of machine tool delivered to handset from the composite aircraft interface in the mode of serial, and after handset received " descrambling command code ", authorization data came into force, up to remote-control closedown or outage shutdown.
Above-mentioned " descrambling command code " just sends from the composite aircraft interface after machine tool carries out cryptographic calculation.
The key of above-mentioned encryption usefulness is that machine tool receives next current address data as key from network, and the machine tool encrypted secret key will constantly change in time; Equally, the key of handset deciphering also is to receive the current address data of coming from network, and the key synchronization of composite aircraft changes.
Adopt said method, headend room control terminal temperature difference descrambler descrambles can be expanded terminal temperature difference and is selected different program audiences or request program.Simultaneously, headend room is controlled the machine tool and the handset descrambling of terminal temperature difference simultaneously, if terminal temperature difference connects handset more voluntarily, need front end to give machine tool and handset mandate simultaneously, and give the authorization command of machine tool to handset, just handset possesses the mandate of front end and machine tool simultaneously, just can receive the signal of cable television channels.This joint control method is for developing value-added services in the interference blanking system of cable TV station provides convenience.
Description of drawings
Fig. 1 is the theory diagram of machine tool of the present invention;
Fig. 2 is the theory diagram of handset of the present invention.
Embodiment
The prerequisite of enforcement of the present invention is that headend room is provided with the scrambling main frame, and realizes the descrambling to terminal temperature difference.
Interference blanking system front end scrambling equipment is mainly by synchronous motor, scrambling main frame, scrambler, data encryption modulator, and computer and Control Software are formed.In the headend equipment, according to the subscriber data of input computer, computer is delivered to the scrambling main frame with it, forms authorization message by the scrambling main frame, mixes the back via data modulator modulation back and broadcasts.
As shown in Figure 1, machine tool to terminal temperature difference carries out descrambling: the signal of receiver input scrambling, isolate image and data two paths of signals through data separation circuit, data-signal passes through data demodulation circuit, the output authorization signal, whether CPU judges the mandate of this receiver according to the frequency group of authorization signal and remote controller selection, and exports corresponding descrambling pulse; The descrambling pulse is reduced processing by descrambling circuit to the scrambling picture signal, the TV signal after the reduction of output descrambling.
Machine tool is provided with sub-line machine interface, send " descrambling command code " from the composite aircraft interface and give handset, " the descrambling command code " of machine tool delivers to handset from the composite aircraft interface in the mode of serial, and this function can then not send " descrambling command code " by front end scrambling host computer control when closing the composite aircraft function.The numerical value of " descrambling command code " is given when programming, also can change as requested.Handset is only assert one predetermined " descrambling command code ".
As shown in Figure 2, carry out descrambling, have independent user number, have the authorization function identical, can from network, receive authorization data with machine tool for the handset of terminal temperature difference." the descrambling command code " of the authorization data that receives as there not being machine tool to send here, authorization data can not come into force.
After handset received " descrambling command code ", authorization data came into force, up to remote-control closedown or outage shutdown.
Relevant " descrambling command code " just sends from the composite aircraft interface after machine tool carries out cryptographic calculation.
The key of encrypting usefulness is that machine tool receives next current address data as key from network, and therefore, the machine tool encrypted secret key will constantly change in time.Equally, the key of handset deciphering also is to receive the current address data of coming from network, and the key synchronization of composite aircraft changes.
Claims (3)
1. the method for descrambler terminal composite aircraft joint control in the interference blanking system, front end scrambling host computer control is carried out descrambling to the machine tool and the handset of terminal temperature difference, handset has independent user number, have the authorization function identical with machine tool, can from network, receive authorization data, send the descrambling command code to handset by machine tool, realize that signal receives;
Machine tool wherein:
Machine tool can send the descrambling command code to handset from the composite aircraft interface, and this function can then not send the descrambling command code by front end scrambling host computer control when closing the composite aircraft function;
The numerical value of descrambling command code is given when programming, also can change as requested;
Handset wherein:
Handset is only assert a predetermined descrambling command code, the descrambling command code that the authorization data that receives is sent here as there not being machine tool, and authorization data can not come into force;
The descrambling command code of machine tool is delivered to handset from the composite aircraft interface in the mode of serial, and after handset received the descrambling command code, authorization data came into force, up to remote-control closedown or outage shutdown.
2. the method for descrambler terminal composite aircraft joint control in a kind of interference blanking system as claimed in claim 1 is characterized in that the descrambling command code after machine tool carries out cryptographic calculation, just sends from the composite aircraft interface.
3. to be machine tool receive the current address data of coming as key from network for the method for descrambler terminal composite aircraft joint control in a kind of interference blanking system as claimed in claim 2, the key that it is characterized in that encrypting usefulness, and the machine tool encrypted secret key will constantly change in time; Equally, the key of handset deciphering also is to receive the current address data of coming from network, and the key synchronization of composite aircraft changes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011272708A CN1177477C (en) | 2001-09-24 | 2001-09-24 | Method of integrated control of descrambler terminal primary and secondary machine in descrambler added system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011272708A CN1177477C (en) | 2001-09-24 | 2001-09-24 | Method of integrated control of descrambler terminal primary and secondary machine in descrambler added system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1411276A true CN1411276A (en) | 2003-04-16 |
| CN1177477C CN1177477C (en) | 2004-11-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011272708A Expired - Fee Related CN1177477C (en) | 2001-09-24 | 2001-09-24 | Method of integrated control of descrambler terminal primary and secondary machine in descrambler added system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1177477C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100425074C (en) * | 2006-03-03 | 2008-10-08 | 北京视博数字电视科技有限公司 | Method for realizing master-slave intelligent card for one-user multiple-terminal management |
| CN102378054A (en) * | 2011-10-09 | 2012-03-14 | 深圳创维数字技术股份有限公司 | Slave card authentication method and authentication system for digital set-top box (DSTB) |
-
2001
- 2001-09-24 CN CNB011272708A patent/CN1177477C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100425074C (en) * | 2006-03-03 | 2008-10-08 | 北京视博数字电视科技有限公司 | Method for realizing master-slave intelligent card for one-user multiple-terminal management |
| CN102378054A (en) * | 2011-10-09 | 2012-03-14 | 深圳创维数字技术股份有限公司 | Slave card authentication method and authentication system for digital set-top box (DSTB) |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1177477C (en) | 2004-11-24 |
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