CN1852435A - Digital medium safety broadcasting system and method - Google Patents
Digital medium safety broadcasting system and method Download PDFInfo
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- CN1852435A CN1852435A CN 200610032892 CN200610032892A CN1852435A CN 1852435 A CN1852435 A CN 1852435A CN 200610032892 CN200610032892 CN 200610032892 CN 200610032892 A CN200610032892 A CN 200610032892A CN 1852435 A CN1852435 A CN 1852435A
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- multiplexer
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Abstract
The system includes following parts: switching matrix connected to program source; multiplexer connected to the output end of the switching matrix; control equipment for filling up broadcast; and backup program source with backup programs being stored. The control equipment for filling up broadcast is connected to the multiplexer. The backup program source is connected to the input end of the switching matrix. When the multiplexer detect abnormal code flow from the switching matrix, the said control equipment switches the input of the multiplexer from program source to backup program source. The invention also discloses corresponding method. Through real time analysis of digital program code flow, and filling up broadcast mode of program code flow, the invention solves issue of safe broadcast when code flow of digital TV program is suffering from attack. The invention ensures safe broadcast for front end of digital broadcast/TV effectively.
Description
Technical field
The present invention relates to the multi-media communication technical field, more particularly, relate to a kind of digital medium safety broadcasting system and method.
Background technology
Broadcasting and TV conduct be medium the most widely, have become people's necessary part of living.And the safety of broadcasting and TV medium is broadcasted, and seeming becomes more and more important.Satellite-signal, transmission line are when under attack, and media program content tends to destroyed or replaces with illegal programs, and this will cause serious consequence.Therefore guarantee to broadcast/the TV signal safe transmission is the problem that current broadcast/TV presses for solution.
At current each big province net, districts and cities have all realized the digitized program transmission and have broadcasted.When running into circuit and attack, generally can only evade illegal programs and broadcast by manually pulling out under line, the equipment means such as electricity.Yet adopt this kind physical treatment mode to have following problem:
1, problem detection speed is slow: usually destroy take place after, wait until artificial passive examining, or terminal use's phone feedback just can detect attack, need minute rank detection time.
2, operation is loaded down with trivial details, and consequence influence is serious: need manual machine under electricity usually or pull out line, stop broadcast, the terminal use can't watch program.
Summary of the invention
The technical problem to be solved in the present invention is, detects the defective that reaches complex operation more slowly at above-mentioned existing broadcasting/TV when under attack, and a kind of digital medium safety broadcasting system and method are provided.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of digital medium safety broadcasting system, include the switching matrix that is connected to program source, the multiplexer that is connected with the output of described switching matrix, also include and carry out the backup program source that the program pad is broadcast the pad Broadcast Control system device of operation and stored the backup program, described pad Broadcast Control system device is connected with multiplexer, described backup program source is connected with the input of switching matrix, and described pad Broadcast Control system device detects from the code stream of switching matrix at multiplexer and makes the input of multiplexer switch to the backup program source from program source when unusual.
In digital medium safety broadcasting system of the present invention, also comprise the network management system that is connected with switching matrix with multiplexer, the decoder that is connected with described switching matrix, the screen supervisory control system that is connected with described decoder, described network management system detects code stream at multiplexer and by switching matrix unusual code stream is dispatched to decoder when unusual, and described decoder is play unusual code stream in the screen supervisory control system.
In digital medium safety broadcasting system of the present invention, described code stream includes PCR shake, PSI/SI information change unusually.
In digital medium safety broadcasting system of the present invention, described network management system includes and produce the device of reporting to the police when multiplexer detects unusual code stream.
The present invention also provides a kind of digital medium safety player method, is used for realizing the security control of Digital Media broadcast, may further comprise the steps:
Whether (a) multiplexer detects code stream when handling code stream unusual;
(b) pad Broadcast Control system device detects described code stream when unusual at multiplexer, makes multiplexer that its input is switched to the backup program source from program source.
In digital medium safety player method of the present invention, described step (b) may further comprise the steps:
(b1) network management system detects code stream at described multiplexer and by switching matrix unusual code stream is dispatched to decoder when unusual;
(b2) described decoder is play unusual code stream in the screen supervisory control system, confirms further whether code stream is unusual;
(b3) pad Broadcast Control system device is confirmed to make multiplexer that its input port is switched to the backup program source from program source when unusual at code stream.
In digital medium safety player method of the present invention, further comprise in the described step (b1), detect code stream when unusual at described multiplexer, the step that network management system is reported to the police.
In digital medium safety player method of the present invention, when switching input, multiplexer described in the described step (b) keeps the PSI/SI information of former program source.
In digital medium safety player method of the present invention, described code stream includes PCR shake, PSI/SI information change unusually.
Digital medium safety broadcasting system of the present invention and method, by real-time analysis, the program stream pad broadcast mode to the digital program code stream, the safety that has solved under the digital television program code stream situation under attack is broadcasted.In addition, the present invention detects code stream and the picture control combination, realizes that automatically the program pad when digital broadcasting/TV programme code stream is attacked is broadcast, and ensures that effectively the program safety of digital broadcasting/television headend is broadcasted.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the first example structure schematic diagram of digital medium safety broadcasting system of the present invention;
Fig. 2 is the flow chart of the digital medium safety player method of embodiment correspondence among Fig. 1;
Fig. 3 is the second example structure schematic diagram of digital medium safety broadcasting system of the present invention;
Fig. 4 is the flow chart of the digital medium safety player method of embodiment correspondence among Fig. 3.
Embodiment
As shown in Figure 1, in first embodiment of digital medium safety broadcasting system of the present invention, include switching matrix 15, multiplexer 18, pad Broadcast Control system device 12 and backup program source 13, wherein back up the input that program source is connected to switching matrix 15, multiplexer 18 is connected with switching matrix 15, and pad Broadcast Control system device 12 is connected to multiplexer 18.In the present embodiment, switching matrix 15, multiplexer 18 and backup program source 13 can be positioned at same equipment machine room, form the digital TV front-end network.
In the present embodiment, normal broadcast items source can derive from satellite or SDH (SynchronousDigital Hierarchy, synchronous digital hierarchy) network.The code stream that derives from satellite receiver 17 via satellite converts to and is input to multiplexer 18 after ASI (Asynchronous Serial Interface Asynchronous Serial Interface) code stream inserts switching matrix 15, and the code stream that derives from the SDH network is separated by adapter 16 and converted the ASI code stream after adaptive to and insert switching matrix 15 and be input to multiplexer 18.
Store the backup program in the backup program source 13, it can be common video/audio server or similar code stream generation equipment/system.Backup program source 13 is connected to the input of switching matrix 15, for switching matrix provides the backup program stream.Switching matrix 15 is the ASI switching matrix, and it is used for the exchange of ASI digital signal.By this equipment, utilize a spot of Network adaptation and decoding device can realize the monitoring of program, pad is broadcast and is recorded.In the present embodiment, switching matrix 15 is used for the code stream from program source (from SDH or satellite) or backup program source 13 is assigned to the code stream input port of each multiplexer 18.
The audio/video code stream and the supplemental bit stream of multiplexer 18 received code ends, according to certain multiplexing method with its multiplexing single transport stream (TS) that becomes.In the present embodiment, multiplexer 18 sends to QAM modulator 19 with synthetic transport stream, and is transferred to HFC (Hybrid Fiber Coaxial, hybrid fiber coax) by blender, realizes the transmission of audio/video data.
In the present embodiment, multiplexer 18 is in processing audio/video code flow, can realize that also code stream detects, each input code flow is detected, comprise whether transport stream loses synchronously, whether companion's byte wrong, transport stream whether continuously, whether PAT, pmt table and pid value correct etc.Because when program is under attack, the program stream relevant information can change, PCR (Program Clock Reference for example, Program Clock Reference) shake, PSI/SI (Program Specific Information/ServiceInformation, Program Specific Information/business information) change etc., whether multiplexer 18 promptly judges unusually by detecting above-mentioned code stream whether program is under attack.
Pad Broadcast Control system device 12 detects code stream when unusual at multiplexer 18, carry out the program pad and broadcast operation, it generates control command and sends to multiplexer 18, make multiplexer 18 that multiplexing code stream is used for replacing from the backup code stream that backs up program source, and maintenance PSI/SI information constant (, then returning to the PSI/SI information of former program source when code stream is unusual) if PSI/SI information changes.User terminal is watched the code stream after pad is broadcast.Like this, just realized the safety broadcast of Digital Media (audio/video).
As shown in Figure 2, be the flow chart of the digital medium safety player method of embodiment correspondence among Fig. 1.
The code stream that multiplexer 18 is handled from switching matrix 15 carries out multiple connection or tap with SPTS or the MPTS of importing, and generates or replace (step S21) such as PSI/SI information.
If multiplexer 18 judges that code stream is not under attack, PCR shake, PSI/SI information change etc. promptly do not appear, then return step S21.
If multiplexer 18 judges that code stream is under attack, PCR shake, PSI/SI information change etc. promptly do not appear, and then multiplexer 18 produces alarm signal.Pad Broadcast Control system device 12 is when multiplexer 18 produces alarm signal, generate control command, make multiplexer 18 that its input is switched to backup program source 13 from program source, use the backup code stream of backup program source 13 to replace unusual code stream, finish pad and broadcast operation (step S23).
As shown in Figure 3, in second embodiment of digital medium safety broadcasting system of the present invention, similar with first embodiment, it includes switching matrix 35, multiplexer 38, pad Broadcast Control system device 32, backup program source 33, wherein back up the input that program source 33 is connected to switching matrix 35, multiplexer 38 is connected with switching matrix 35, and pad Broadcast Control system device 32 is connected to multiplexer 38.
Different with first embodiment, in the present embodiment, digital medium safety broadcasting system of the present invention also comprises network management system 31, decoder 34 and screen supervisory control system, wherein network management system 31 is connected respectively to backup program source 33, switching matrix 35, multiplexer 38, decoder 34 pad Broadcast Control system device 32 and screen supervisory control systems (can pass through Ethernet or similar network), and the input of decoder 34 and output are connected respectively to switching matrix 35 and screen supervisory control system.In the present embodiment, switching matrix 35, multiplexer 38, backup program source 33, decoder 34 and network management system 31 can be positioned at same equipment machine room, form the digital TV front-end network.
Decoder 34 the code stream that is used to decode from switching matrix 35, and decoded code stream sent to the screen supervisory control system.The screen supervisory control system includes the AV matrix and screen monitors wall, and the AV matrix is used for the data stream scheduling from decoder 34 is play to the different TVs (TV) of screen monitoring wall.
It is unusual and when producing alarm signal that network management system 31 detects code stream at multiplexer 38, is dispatched to decoder 34 according to the code stream alarm signal by switching matrix 35 code stream of will being correlated with, and monitors wall thereby decoding is played to screen.In addition, network management system also can generation sound/light or other forms of alarm.
Different with first embodiment is, in the present embodiment, pad Broadcast Control system device 32 does not fill up immediately and broadcasts operation after multiplexer 38 produces alarm signals, but broadcasts operation confirming that by the screen supervisory control system code stream fills up when under attack again.Like this, just guaranteed the accuracy of operation.
As shown in Figure 4, be the flow chart of the digital medium safety player method of embodiment correspondence among Fig. 3.
The code stream that multiplexer 38 is handled from switching matrix 35 carries out multiple connection or tap with SPTS or the MPTS of importing, and generates or replace (step S41) such as PSI/SI information.
Multiplexer 38 is when carrying out the code stream processing, also carrying out code stream detects, each input code flow is detected, comprise whether transport stream loses synchronously, whether companion's byte wrong, transport stream whether continuously, whether whether PAT, pmt table and pid value correct etc., under attack to judge code stream.In the present embodiment, multiplexer 38 is when detecting code stream unusual (for example PCR shake, PSI/SI information change etc.), and the judgement code stream is received attack (step S42).
If multiplexer 38 judges that code stream is not under attack, PCR shake, PSI/SI information change etc. promptly do not appear, then return step S41.
If multiplexer 38 judges that code stream is under attack, PCR shake, PSI/SI information change etc. promptly do not appear, and then multiplexer 38 produces alarm signal.When network management system 31 produces alarm signals at multiplexer 38, be dispatched to decoder 34, play relevant code stream (step S43) by the screen supervisory control system behind the relevant code stream of decoder 34 decodings according to the code stream alarm signal code stream of will being correlated with.When receiving the alarm signal of multiplexer 38, network management system 31 also can generation sound/light alarm.
The code stream that pad Broadcast Control system device 32 is play according to the screen supervisory control system is further confirmed code stream whether (step S44) under attack.
If confirm code stream not under fire, then return step S41.
If pad Broadcast Control system device 32 confirms that code stream is under attack, then generate control command, make multiplexer 38 that its input is switched to backup program source 33 from program source, use the backup code stream of backup program source 33 to replace unusual code stream, finish pad and broadcast operation (step S45).
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (9)
1, a kind of digital medium safety broadcasting system, include the switching matrix that is connected to program source, the multiplexer that is connected with the output of described switching matrix, it is characterized in that, also include and carry out the backup program source that the program pad is broadcast the pad Broadcast Control system device of operation and stored the backup program, described pad Broadcast Control system device is connected with multiplexer, described backup program source is connected with the input of switching matrix, and described pad Broadcast Control system device detects from the code stream of switching matrix at multiplexer and makes the input of multiplexer switch to the backup program source from program source when unusual.
2, digital medium safety broadcasting system according to claim 1, it is characterized in that, also comprise the network management system that is connected with switching matrix with multiplexer, the decoder that is connected with described switching matrix, the screen supervisory control system that is connected with described decoder, described network management system detects code stream at multiplexer and by switching matrix unusual code stream is dispatched to decoder when unusual, and described decoder is play unusual code stream in the screen supervisory control system.
3, digital medium safety broadcasting system according to claim 1 and 2 is characterized in that, described code stream includes PCR shake, PSI/SI information change unusually.
4, digital medium safety broadcasting system according to claim 2 is characterized in that, described network management system includes and produce the device of reporting to the police when multiplexer detects unusual code stream.
5, a kind of digital medium safety player method is used for realizing the security control of Digital Media broadcast, it is characterized in that, may further comprise the steps:
Whether (a) multiplexer detects code stream when handling code stream unusual;
(b) pad Broadcast Control system device detects described code stream when unusual at multiplexer, makes multiplexer that its input is switched to the backup program source from program source.
6, digital medium safety player method according to claim 5 is characterized in that, described step (b) may further comprise the steps:
(b1) network management system detects code stream at described multiplexer and by switching matrix unusual code stream is dispatched to decoder when unusual;
(b2) described decoder is play unusual code stream in the screen supervisory control system, confirms further whether code stream is unusual;
(b3) pad Broadcast Control system device is confirmed to make multiplexer that its input port is switched to the backup program source from program source when unusual at code stream.
7, digital medium safety player method according to claim 6 is characterized in that, further comprises in the described step (b1), detects code stream when unusual at described multiplexer, the step that network management system is reported to the police.
8, digital medium safety player method according to claim 5 is characterized in that, keeps the PSI/SI information of former program source when multiplexer described in the described step (b) switches input.
According to each described digital medium safety player method among the claim 5-9, it is characterized in that 9, described code stream includes PCR shake, PSI/SI information change unusually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100328929A CN100440974C (en) | 2006-01-10 | 2006-01-10 | Digital medium safety broadcasting system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100328929A CN100440974C (en) | 2006-01-10 | 2006-01-10 | Digital medium safety broadcasting system and method |
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| CN1852435A true CN1852435A (en) | 2006-10-25 |
| CN100440974C CN100440974C (en) | 2008-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100328929A Expired - Fee Related CN100440974C (en) | 2006-01-10 | 2006-01-10 | Digital medium safety broadcasting system and method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102006498A (en) * | 2010-12-10 | 2011-04-06 | 北京中科大洋科技发展股份有限公司 | Safe broadcast monitoring method based on video and audio comparison |
| CN101572778B (en) * | 2008-04-28 | 2011-11-30 | 北大方正集团有限公司 | Method and system for broadcasting programs |
| CN101695134B (en) * | 2009-10-15 | 2016-08-03 | 中兴通讯股份有限公司 | The terminal of a kind of improving play performance of terminal in weak signal environment, system and method |
| CN108696713A (en) * | 2018-04-27 | 2018-10-23 | 苏州科达科技股份有限公司 | Safety detecting method, device and the test equipment of code stream |
| CN112449237A (en) * | 2019-08-12 | 2021-03-05 | 中兴通讯股份有限公司 | Method, device and system for detecting video code stream |
| CN114070828A (en) * | 2022-01-17 | 2022-02-18 | 中央广播电视总台 | Program stream fault detection method and device, computer equipment and readable storage medium |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH11112528A (en) * | 1997-10-03 | 1999-04-23 | Mitsubishi Heavy Ind Ltd | Catv access system |
| EP1436686A4 (en) * | 2001-09-20 | 2005-09-21 | Ucentric Holdings Inc | Centralized resource manager with passive sensing system |
| CN1199458C (en) * | 2002-04-18 | 2005-04-27 | 华为技术有限公司 | All-process backup video communication system |
| US20040255327A1 (en) * | 2003-06-12 | 2004-12-16 | Digital Deck, Inc. | Media content distribution system and method |
-
2006
- 2006-01-10 CN CNB2006100328929A patent/CN100440974C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101572778B (en) * | 2008-04-28 | 2011-11-30 | 北大方正集团有限公司 | Method and system for broadcasting programs |
| CN101695134B (en) * | 2009-10-15 | 2016-08-03 | 中兴通讯股份有限公司 | The terminal of a kind of improving play performance of terminal in weak signal environment, system and method |
| CN102006498A (en) * | 2010-12-10 | 2011-04-06 | 北京中科大洋科技发展股份有限公司 | Safe broadcast monitoring method based on video and audio comparison |
| CN102006498B (en) * | 2010-12-10 | 2012-05-30 | 北京中科大洋科技发展股份有限公司 | Safe broadcast monitoring method based on video and audio comparison |
| CN108696713A (en) * | 2018-04-27 | 2018-10-23 | 苏州科达科技股份有限公司 | Safety detecting method, device and the test equipment of code stream |
| CN108696713B (en) * | 2018-04-27 | 2021-08-24 | 苏州科达科技股份有限公司 | Code stream safety test method, device and test equipment |
| CN112449237A (en) * | 2019-08-12 | 2021-03-05 | 中兴通讯股份有限公司 | Method, device and system for detecting video code stream |
| CN112449237B (en) * | 2019-08-12 | 2023-05-05 | 中兴通讯股份有限公司 | Method, device and system for detecting video code stream |
| CN114070828A (en) * | 2022-01-17 | 2022-02-18 | 中央广播电视总台 | Program stream fault detection method and device, computer equipment and readable storage medium |
| CN114070828B (en) * | 2022-01-17 | 2022-05-17 | 中央广播电视总台 | Program stream fault detection method and device, computer equipment and readable storage medium |
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| CN100440974C (en) | 2008-12-03 |
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