CN101123710A - Method for adjusting packet identifier in transmission flow - Google Patents
Method for adjusting packet identifier in transmission flow Download PDFInfo
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- CN101123710A CN101123710A CNA2007101394636A CN200710139463A CN101123710A CN 101123710 A CN101123710 A CN 101123710A CN A2007101394636 A CNA2007101394636 A CN A2007101394636A CN 200710139463 A CN200710139463 A CN 200710139463A CN 101123710 A CN101123710 A CN 101123710A
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- packet identifier
- transport stream
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- control command
- receiving chip
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Abstract
The invention discloses a method used to adjust a packet identifier in transport stream and relates to a digital information processing technology about management and control on satellite digital TV broadcasting in communication field. According to the existing related standard and technology of the satellite digital TV, the invention controls a multiplexer with a front-end control system to adjust the packet identifier in transport stream, sends corresponding order to a safety receiving chip and controls the safety receiving chip to adjust the packet identifier to original value. With the method, the invention has the advantages that the invention can adjust the packet identifier of transport stream uniformly in upflow system, thus resulting in that the equipment without satellite TV safety receiving chip cannot receive legitimate program, which is not only with convenient management but also with higher reliability and security. Therefore, the invention can realize effective management and control on satellite digital TV broadcasting.
Description
Technical field
The present invention relates to a kind of method that Packet Identifier in the transport stream is adjusted in the communications field, it is specially adapted in up-link the Packet Identifier in the transport stream be unified to adjust, make the equipment that the satellite TV secure receiving chip is not installed to receive legal program, realize effective management and control satellite television broadcasting.
Background technology
The invention of safe receiving chip makes satellite television broadcasting is managed and control becomes a reality, it is by the program identification (platform name) that will receive legal name contrast with the chip stored, allow the program transmission stream that allows to receive pass through, filter out and do not allow the program transmission stream that receives, reach the purpose that the satellite television programming signal is controlled.
If but the user installs the satellite television receiver of not being with safe receiving chip privately, then still can receive illegal programs, may be utilized by the lawless person.Therefore to get rid of this hidden danger, will be controlled, make the satellite television receiver that does not have safe receiving chip can not receive legal program satellite TV broadcast system.
Summary of the invention
Technical problem to be solved by this invention just provides and a kind ofly produces related command to (the Packet identity of the Packet Identifier in the mpeg 2 transport stream by the front-end control system, be called for short PID) method that the Packet Identifier in the transport stream changed is adjusted, the present invention makes the equipment that the satellite TV secure receiving chip is not installed can not receive legal program.The present invention also can adopt application-specific integrated circuit (ASIC) to realize, can obtain high reliability and fail safe, is convenient to realize effective management and control to satellite television broadcasting.
The object of the present invention is achieved like this, and it comprises step:
1. by the front-end control system adjusted value that is used for adjusting Packet Identifier is converted to condition code,
2. condition code and control command after the front-end control system will change are packaged into the transport stream format that meets Moving Picture Experts Group-2,
3. the front-end control system is packaged into the TCP/IP form to transport stream and is sent to multiplexer by Ethernet,
4. multiplexer extracts the information in the transport stream, and according to adjusted value and control command Packet Identifier is adjusted, and Packet Identifier adjusted value and the control command that needs are sent to safe receiving chip is multiplexed in the transport stream,
5. adjusted transport stream transfers to safe receiving chip after modulators modulate, transmission network transmission, demodulator demodulation,
6. safe receiving chip extracts Packet Identifier adjusted value and control command, carries out the Packet Identifier recovery operation, finishes the Packet Identifier in the transport stream is adjusted.
2., 4., 6. the control command described in the step is for to add adjusted value with original Packet Identifier in the present invention the, or deducts the adjustment mode of adjusted value with original Packet Identifier.
The present invention compares with background technology, has following advantage:
(1) the present invention adopts and the relevant information of Packet Identifier adjustment and control command to be packaged into the transport stream format that meets Moving Picture Experts Group-2 to be multiplexed into method in the program transport streams again, need not change existing satellite television transmission system, only needing increases by a cover control appliance in upstream ends, therefore, operation is implemented convenient, and cost is low.
(2) the present invention adopts and the relevant information of Packet Identifier adjustment and order to be packaged into the transport stream format that meets Moving Picture Experts Group-2 to be multiplexed into method in the program transport streams again, therefore can not influence the transmission of program in the Packet Identifier adjustment process, can envoy's purpose quality not descend yet.
(3) the present invention conveniently operates and manages by in up-link the Packet Identifier in the transport stream being unified to adjust.
(4) the present invention also has and can adopt application-specific integrated circuit (ASIC) to realize, can obtain high reliability and fail safe, is convenient to realize effective management and control to satellite television broadcasting.
Description of drawings
Fig. 1 is the electric functional-block diagram of the embodiment of the invention.Multiplexer is 100 among Fig. 1, and the front-end control system is 200, and modulator is 300, and transmission network is 400, and demodulator is 500, and safe receiving chip is 600.
Fig. 2 is the electric functional-block diagram of front-end control of the present invention system 200.User interface of software is 201 among Fig. 2, and PID adjustment information maker is 202, and safe receiving chip control command maker is 203, and multiplexer control command maker is 204, and the Ethernet packing device is 205.
Fig. 3 is the electric functional-block diagram of multiplexer 100 of the present invention.The PSI resolver is 101 among Fig. 3, and the PID adjuster is 102, and the packaging multiplexing device is 103, and system controller is 104.
Fig. 4 is the electric functional-block diagram of safe receiving chip 600 of the present invention.The PSI resolver is 601 among Fig. 4, and the PID adjuster is 602, and system controller is 603, and the program filtering device is 604.
Embodiment
Referring to figs. 1 through Fig. 4, the inventive method comprises step:
1. by the front-end control system adjusted value that is used for adjusting Packet Identifier is converted to condition code.
2. condition code and control command after the front-end control system will change are packaged into the transport stream format that meets Moving Picture Experts Group-2.Its control command is for to add adjusted value with original Packet Identifier, or deducts the adjustment mode of adjusted value with original Packet Identifier.
3. the front-end control system is packaged into the TCP/IP form to transport stream and is sent to multiplexer by Ethernet.
4. multiplexer extracts the information in the transport stream, according to adjusted value and control command Packet Identifier is adjusted, and Packet Identifier adjusted value and the control command that needs are sent to safe receiving chip is multiplexed in the transport stream.Its control command is for to add adjusted value with original Packet Identifier, or deducts the adjustment mode of adjusted value with original Packet Identifier.
5. adjusted transport stream transfers to safe receiving chip after modulators modulate, transmission network transmission, demodulator demodulation.
6. safe receiving chip extracts Packet Identifier adjusted value and control command, carries out the Packet Identifier recovery operation.Its control command is for to add adjusted value with original Packet Identifier, or deducts the adjustment mode of adjusted value with original Packet Identifier.Finish the Packet Identifier in the transport stream is adjusted.
The present invention is based on the adjustment of satellite TV broadcast system realization to Packet Identifier in the transport stream, Fig. 1 is the electric functional-block diagram of the embodiment of the invention, it comprises multiplexer 100, front-end control system 200, modulator 300, transmission network 400, demodulator 500, safe receiving chip 600, transmission network 400 is made of parts such as transmitting antenna, satellite, reception antennas.Give multiplexer 100 by front-end control system 200 generation Packet Identifier adjusted values and control command, multiplexer 100 is according to adjusted value and control command is adjusted Packet Identifier and adjusted value and control command that needs are given safe receiving chip 600 are sent to receiving terminal, by safe receiving chip 600 Packet Identifier is restored, finish the Packet Identifier in the transport stream is adjusted.
1., 2., 3. go on foot embodiment is finished by front-end control system 200.Fig. 2 is the electric functional-block diagram of front-end control of the present invention system 200.The data of front-end control system 200 outputs that multiplexer is 100 pairs are handled.Front-end control system 200 is made up of the software of special purpose computer and custom-made, the encapsulation of the conversion of Packet Identifier adjusted value, the generation of control command, transport stream format and IP bag is finished by software, then data message is sent to multiplexer 100 by the ethernet controller of computer.Its control command of embodiment can be for adding adjusted value with original Packet Identifier, or deduct the adjustment mode of adjusted value with original Packet Identifier.
Comprise among Fig. 2 with lower module: user interface of software 201, PID adjustment information maker 202, safe receiving chip control command maker 203, multiplexer control command maker 204, Ethernet packing device 205.
PID adjustment information maker 202 converts the adjusted value that is used for adjusting Packet Identifier to condition code, safe receiving chip control command maker 203 generates the control command that need give safe receiving chip 600, multiplexer control command maker 204 generates the control command that need give multiplexer 100, and above-mentioned information and order are packaged into the transport stream format that meets Moving Picture Experts Group-2.Ethernet packing device 205 is packaged into the TCP/IP form to the transport stream after encapsulating, and is sent to multiplexer 100 by Ethernet again.
4. the present invention goes on foot embodiment and is finished by multiplexer 100.Fig. 3 is the electric functional-block diagram of multiplexer 100 of the present invention.The data of front-end control system 200 outputs are as the input of multiplexer 100.The result of multiplexer 100 outputs to modulator 300.Multiplexer 100 receives the IP bag that the past end control system 200 sends in the program receiving transport stream, the Packet Identifier adjustment information that multiplexer 100 extracts wherein, according to adjusted value and control command the Packet Identifier in the transport stream is adjusted again, and the Packet Identifier adjusted value and the control command that need be sent to safe receiving chip 600 are multiplexed in the transport stream.Its control command of embodiment can be for adding adjusted value with original Packet Identifier, or deduct the adjustment mode of adjusted value with original Packet Identifier.
Main functional modules comprises among Fig. 3: PSI resolver 101, PID adjuster 102, packaging multiplexing device 103, system controller 104.Packet Identifier adjusted value and control command that front-end control system 200 generates are input to system controller 104, system controller 104 control PSI resolvers 101 are resolved program transport streams, and relevant information table is offered the operation that PID adjuster 102, packaging multiplexing device 103, system controller 104 are correlated with.System controller 104 each module of control are operated and are controlled packaging multiplexing device 103 to the relevant information table Packet Identifier adjusted value and the control command that needs are sent to safe receiving chip 600 is multiplexed in the transport stream.Transport stream after multiplexer 100 is adjusted and be multiplexing is delivered to modulator 300 and is modulated.
5. the present invention goes on foot embodiment and is finished by modulator 300, transmission network 400, demodulator 500.Transport stream after multiplexer 100 is adjusted and be multiplexing is modulated into radiofrequency signal by modulator 300 and transmits, by transmission network 400 with radio signal transmission to demodulator 500, convert digital signal to by demodulator 500 again and give safe receiving chip 600.
6. the present invention goes on foot embodiment and is finished by safe receiving chip 600.Fig. 4 is the electric functional-block diagram of safe receiving chip 600 of the present invention.Safe receiving chip 600 extracts the bag that comprises the Packet Identifier adjustment information from transport stream, according to Packet Identifier adjusted value and control command transport stream is carried out the Packet Identifier recovery operation.Its control command of embodiment can be for adding adjusted value with original Packet Identifier, or deduct the adjustment mode of adjusted value with original Packet Identifier.
Main functional modules comprises among Fig. 4: PSI resolver 601, PID adjuster 602, system controller 603, program filtering device 604.Tuning and A/D conversion becomes digital signal and is input to safe receiving chip 600 radiofrequency signal through demodulator 500, PSI resolver 601 analyzing atransmission stream are extracted relevant information table and control command and are offered PID adjuster 602, system controller 603, program filtering device 604 and carry out relevant operation.System controller 603 will recover its original value through the Packet Identifier of adjusting according to Packet Identifier adjusted value and control command that PSI resolver 601 extracts, finish the whole operation that Packet Identifier is adjusted.Each module of simultaneity factor controller 603 control are operated and are controlled program filtering device 604 to the relevant information table relevant information table of illegal programs is filtered out, and only allow legal program pass through.
Claims (2)
1. method that the Packet Identifier in the transport stream is adjusted is characterized in that comprising step:
1. by the front-end control system adjusted value that is used for adjusting Packet Identifier is converted to condition code,
2. condition code and control command after the front-end control system will change are packaged into the transport stream format that meets Moving Picture Experts Group-2,
3. the front-end control system is packaged into the TCP/IP form to transport stream and is sent to multiplexer by Ethernet,
4. multiplexer extracts the information in the transport stream, and according to adjusted value and control command Packet Identifier is adjusted, and Packet Identifier adjusted value and the control command that needs are sent to safe receiving chip is multiplexed in the transport stream,
5. adjusted transport stream transfers to safe receiving chip after modulators modulate, transmission network transmission, demodulator demodulation,
6. safe receiving chip extracts Packet Identifier adjusted value and control command, carries out the Packet Identifier recovery operation, finishes the Packet Identifier in the transport stream is adjusted.
2. the method that Packet Identifier in the transport stream is adjusted according to claim 1, it is characterized in that: the 2., 4., 6. the control command described in the step is for to add adjusted value with original Packet Identifier, or deducts the adjustment mode of adjusted value with original Packet Identifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101394636A CN101123710A (en) | 2007-09-20 | 2007-09-20 | Method for adjusting packet identifier in transmission flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101394636A CN101123710A (en) | 2007-09-20 | 2007-09-20 | Method for adjusting packet identifier in transmission flow |
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| Publication Number | Publication Date |
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| CN101123710A true CN101123710A (en) | 2008-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2007101394636A Pending CN101123710A (en) | 2007-09-20 | 2007-09-20 | Method for adjusting packet identifier in transmission flow |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101635824A (en) * | 2009-08-11 | 2010-01-27 | 中山广电视讯有限公司 | Small area control system of digital television |
| CN101325505B (en) * | 2008-07-24 | 2010-06-16 | 中兴通讯股份有限公司 | Transmission method for multiplexed data flow |
-
2007
- 2007-09-20 CN CNA2007101394636A patent/CN101123710A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101325505B (en) * | 2008-07-24 | 2010-06-16 | 中兴通讯股份有限公司 | Transmission method for multiplexed data flow |
| CN101635824A (en) * | 2009-08-11 | 2010-01-27 | 中山广电视讯有限公司 | Small area control system of digital television |
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Open date: 20080213 |