CN104581393A - Fault judging and switching method and system for television broadcasting signal - Google Patents
Fault judging and switching method and system for television broadcasting signal Download PDFInfo
- Publication number
- CN104581393A CN104581393A CN201510040783.0A CN201510040783A CN104581393A CN 104581393 A CN104581393 A CN 104581393A CN 201510040783 A CN201510040783 A CN 201510040783A CN 104581393 A CN104581393 A CN 104581393A
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- CN
- China
- Prior art keywords
- signal
- television broadcasting
- broadcasting signal
- digital watermarking
- breakdown judge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/44209—Monitoring of downstream path of the transmission network originating from a server, e.g. bandwidth variations of a wireless network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/4425—Monitoring of client processing errors or hardware failure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/835—Generation of protective data, e.g. certificates
- H04N21/8358—Generation of protective data, e.g. certificates involving watermark
Abstract
The invention discloses a fault judging and switching method and system for a television broadcasting signal. The fault judging and switching method for the television broadcasting signal comprises the following steps that before the television broadcasting signal is output, whether the signal contains a digital watermark is detected, whether the digital watermark is correct is detected if the digital watermark is contained in the signal, the television broadcasting signal is output if the digital watermark is correct, and a standby broadcasting signal is output if the signal does not contain a digital watermark or the digital watermark is not correct. The fault judging and switching system for the television broadcasting signal comprises a one-out-multiple switch and a digital watermark detecting device. According to the fault judging and switching method and system for the television broadcasting signal, whether a television broadcasting signal is abnormal or not can be detected, and the abnormal situations refer to the severe broadcasting problems including a black field, a colored field, a colored strip, a frozen frame, audio loss and the like; automatic switching of multiple paths of SDI signals is achieved, the working intensity of operators on duty is relieved, emergency accuracy is improved, and emergency response time is shortened.
Description
Technical field
The present invention relates to television broadcasting technical field, especially the breakdown judge of television broadcasting signal and changing method and system thereof.
Background technology
At present, in television broadcasting technical field, in order to improve the fail safe of broadcasting, when actual play, usually active and standby two-way video-signal is broadcasted simultaneously.Signal is before really being broadcasted, can through the conversion of a lot of equipment and distribution, wherein a lot of equipment can have an impact to the quality of signal and content, and especially some equipment can carry out encoding and decoding again to signal, and original image increases the process such as captions, station symbol, gain.When wherein one or more equipment go wrong or there is artificial incorrect operation, often produce some and badly broadcast problem, this just may cause inconsistent (such as main broadcaster's signal goes wrong, normal for broadcasting signal) of two paths of signals, therefore needs to carry out manual intervention to output signal.Broadcast operator on duty is such as needed to judge how to carry out broadcast emergent (when main broadcaster going wrong, for broadcasting normally, then needing to be switched to for broadcasting signal; Active and standby two paths of signals all goes wrong, then need to be switched to pad and broadcast signal), if operator on duty did not notice this mistake at that time, or unskilled to emergency operation, broadcast accident will be caused, or increase emergency event, extend wrong time.
In the prior art, usually single channel sdi signal is detected, judge whether signal exists the bad property the broadcast mistakes such as black field, color field, colour bar, quiet frame, audio frequency loss.But due to this kind of method, to detect error items limited, therefore, it is possible to the error situation of process is few, detect bad to broadcast problem limited, also need manual intervention.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of breakdown judge of television broadcasting signal and changing method and system thereof, can detect broadcasting signal and whether there is exception, and when there being abnormal conditions, automatically switching and exporting normal signal.
For solving the problems of the technologies described above, according to an aspect of the present invention, a kind of breakdown judge and changing method of television broadcasting signal is provided, comprises the steps:
Before television broadcasting signal exports, detect whether comprise digital watermarking, if comprise digital watermarking, then carry out next step, otherwise be that signal broadcast by pad by output switching;
Whether correctly detect digital watermarking, if correctly, exporting this road television broadcasting signal, if incorrect, is that signal broadcast by pad by output switching.
Preferably, in the breakdown judge of television broadcasting signal provided by the invention and changing method, when television broadcasting signal is multiple signals, detects each road signal successively and whether comprise digital watermarking and whether digital watermarking is correct, if digital watermarking is correct, be then this road signal by output switching;
If this road signal do not comprise digital watermarking or digital watermarking incorrect time, detect next road signal.
Preferably, when television broadcasting signal is active and standby two paths of signals, detects main broadcaster signal and whether comprise digital watermarking and whether digital watermarking is correct, if digital watermarking is correct, is then main broadcaster's signal by output switching;
If main broadcaster's signal does not comprise digital watermarking or digital watermarking is incorrect, detect standby signal of broadcasting and whether comprise digital watermarking and whether digital watermarking is correct, if correct, then output switching is broadcast signal for standby, if broadcasting signal standby and do not comprise digital watermarking or digital watermarking is incorrect, is that signal broadcast by pad by output switching.
Preferably, in the breakdown judge of television broadcasting signal provided by the invention and changing method, when whether correctly detecting digital watermarking, if the digital watermarking detected continuous wrong time is not more than Preset Time, then think that digital watermarking is correct.
Preferably, in the breakdown judge of television broadcasting signal provided by the invention and changing method, described television broadcasting signal is sdi signal.
Preferably, in the breakdown judge of television broadcasting signal provided by the invention and changing method, be also included in before described television broadcasting signal broadcasts, broadcast at it step that file increases digital watermarking.
According to a further aspect in the invention, the breakdown judge of a kind of television broadcasting signal provided by the invention and switched system, comprise
Whether digital watermark detecting device, comprise digital watermarking for detecting television broadcasting signal that input through its signal input part, that come from broadcast system prime, and whether digital watermarking is correct, and according to testing result, export control command by its output; With
Multiselect one switch, it comprises multiple input, an output and at least one control end, described input connects the television broadcasting signal coming from broadcast system prime respectively, according to the control command coming from described digital watermark detecting device that control end receives, output end signal is switched to corresponding input end signal.
Preferably, in the breakdown judge of television broadcasting signal provided by the invention and switched system, the input of described multiselect one switch connects multi-channel television broadcasting signal respectively and signal broadcast by pad, and the input of described digital watermark detecting device connects corresponding multi-channel television broadcasting signal respectively.
Preferably, described multi-channel television broadcasting signal is for main broadcaster's signal with for broadcasting signal.
Preferably, in the breakdown judge of television broadcasting signal provided by the invention and switched system, also comprise digital watermarking generator, before broadcasting at broadcast file, increase digital watermarking.
By the present invention, whether extremely can detect television broadcasting signal, this exception includes situation, and Ru Heichang, color field, colour bar, quiet frame, audio frequency loss etc. are bad broadcasts problem; And achieve the automatic switchover of multichannel sdi signal, reduce operator on duty's working strength, improve emergent accuracy, reduce the emergency response time.
Accompanying drawing explanation
By referring to the description of accompanying drawing to the embodiment of the present invention, above-mentioned and other objects of the present invention, feature and advantage will be more clear, in the accompanying drawings:
The breakdown judge that Fig. 1 is television broadcasting signal described in inventive embodiments one and switched system structural representation;
The breakdown judge that Fig. 2 is television broadcasting signal described in this bright embodiment one and changing method flow chart;
Fig. 3 is breakdown judge and the switched system application schematic diagram of television broadcasting signal of the present invention;
The breakdown judge that Fig. 4 is television broadcasting signal described in this bright embodiment two and changing method flow chart.
Embodiment
Hereinafter with reference to accompanying drawing, various embodiment of the present invention is described in more detail.In various figures, identical element adopts same or similar Reference numeral to represent.For the sake of clarity, the various piece in accompanying drawing is not drawn in proportion.
As shown in Figure 1, the breakdown judge of a kind of television broadcasting signal provided for the embodiment of the present invention one and switched system, comprise digital watermark detecting device 1 and multiselect one switch 2, both inputs connect respectively come from broadcast system prime, same television broadcasting signal after looking depending on point device 31,32 point, the output output television broadcasting signal of multiselect one switch 2; The output of digital watermark detecting device 2 connects the control end of described multiselect one switch 1, for exporting control command to described multiselect one switch 1.
The digital watermarking that the present invention relates to refers in video and audio original image, after video and audio process, increases human eye and the unrecognizable sign of hearing, and is distributed in every frame sdi signal.Based on this principle and said system, the breakdown judge of television broadcasting signal of the present invention and changing method flow process are as shown in Figure 2.
Step S101, before television broadcasting signal exports, detects described sdi signal;
Step S102, judges whether to comprise digital watermarking, if comprise digital watermarking, then carries out next step S103, otherwise forwards step S104 to;
Whether correct step S103, detect digital watermarking, if correctly, export this road television broadcasting signal, if incorrect, forward step S104 to;
Output switching is that signal broadcast by pad by step S104;
Step S105, finally broadcasts sdi signal.
Whether digital watermarking is comprised about how detecting this sdi signal, and whether digital watermarking is correct, multiple method can be had, such as: in above-mentioned testing process, vision signal is analyzed frame by frame, judge whether contain extra mark in signal to be detected, if added, then isolate this mark frame by frame, and compared with original mark, if the two is identical, then think that digital watermarking is correct.
Above method only broadcasts signal to be input as a road broadcasting signal one road pad, in fact, can be multichannel broadcasting signal as required, and wherein, the most conventional is two paths of signals, is respectively active and standby and broadcasts signal.Following examples two, for active and standby signal of broadcasting as input signal, are described further the present invention.
As shown in Figure 3, for inventing breakdown judge and the switched system application structure schematic diagram of described television broadcasting signal.In the present embodiment, comprise active and standby video server 71,72, emergent video tape recorder 73 and extraneous signal access device 74, active and standby video server 71,72 exports sdi signal with digital watermarking respectively to switch between master and slave platform 51,52, these two kinds of signals respectively through respective intermediate equipment, as loudness controller 61,62, at end, every road signal, after looking depending on a point device 31,32 point, outputs to digital watermark detecting device 1 and one-out-three automatic switch 2 simultaneously.Digital watermark detecting device 1 detects this two paths of signals respectively, and detailed process as shown in Figure 4.
Step S111, detects two-way sdi signal in television broadcasting Signal transmissions final stage;
Step S112, judge whether main broadcaster's signal comprises digital watermarking, if comprised, then further, judge that whether digital watermarking is correct in step S113, if correct, then send control command in step S117 to three elections switch, control three elections switch, gating main broadcaster signal exports, final in step S119, broadcast main broadcaster's sdi signal.
If learn that main broadcaster's signal does not have digital watermarking according to judgement in step S112, or detect that the digital watermarking of main broadcaster's signal is incorrect in step S113, then detect for broadcasting signal in step S114.With main broadcaster's signal in like manner, judge standby to broadcast signal whether digital watermarking, comprise and comprise, then S115 judges that whether digital watermarking is correct further, if correctly, then sends control command in step S118 to three elections switch, control three elections switch, the standby signal of broadcasting of gating exports, and finally in step S119, broadcasts for broadcasting sdi signal.
If standby broadcast signal and do not have digital watermarking of detecting in step S114, or detect that the standby digital watermarking broadcasting signal is incorrect in step S115, then send control command to three elections switch in step S116, strobe pad is broadcast signal and is exported.Final in step S119, broadcast pad and broadcast sdi signal.
In the present invention, before broadcast file enters into broadcast system, by digital watermarking adding technique, digital watermarking is added to and waits to broadcast in file, and move in broadcast video server.When broadcasting, controlling video server, according to programme, broadcast files loading being carried out decoding to video server decoding channels and broadcasting.
Further, in the present invention, when detecting that the digital watermarking of main broadcaster's sdi signal is abnormal, judging whether the continuous incorrect length of sdi signal digital watermarking is greater than predetermined threshold Tth, if be not more than, then continuing to detect.If the continuous incorrect length of sdi signal digital watermarking is greater than predetermined number of seconds Tth, then think that the quality of this main broadcaster's signal has problems, then judge that whether the digital watermarking for broadcasting sdi signal is abnormal, if digital watermarking mistake detected, sentence the continuous incorrect length of sdi signal digital watermarking and whether be greater than predetermined threshold Tth, if be not more than, then intermittently detect.If the continuous incorrect length of sdi signal digital watermarking is greater than predetermined threshold Tth, then think that this standby quality broadcasting signal has problems, control three elections switch, strobe pad is broadcast signal and is exported.
When incidental signals is unstable, the digital watermarking added in vision signal in the short time can be caused and not originally to be inconsistent, and the signal now broadcasted does not belong to bad broadcasting, in order to avoid consequent false triggering, the present invention sets scheduled time threshold value Tth, when detecting that digital watermarking is wrong, also continue to detect its duration wrong continuously, if this duration is greater than scheduled time threshold value Tth, then think that signal is now bad signal, need to switch to other signals and export.Here time constant can be a parameter, and according to the difference of vision signal, its value is different, is specifically as follows 3-5 second.
By the present invention, can be implemented in active and standby two-way sdi signal when going wrong, system carries out emergent switching automatically, reduces person works's intensity on duty, improves emergent accuracy, reduces the emergency response time.
Claims (10)
1. the breakdown judge of television broadcasting signal and a changing method, wherein, comprise the steps:
Before television broadcasting signal exports, detect whether comprise digital watermarking, if comprise digital watermarking, then carry out next step, otherwise be that signal broadcast by pad by output switching;
Whether correctly detect digital watermarking, if correctly, exporting this road television broadcasting signal, if incorrect, is that signal broadcast by pad by output switching.
2. the breakdown judge of television broadcasting signal according to claim 1 and changing method, wherein, when television broadcasting signal is multiple signals, detects each road signal successively and whether comprise digital watermarking and whether digital watermarking is correct, if digital watermarking is correct, be then this road signal by output switching;
If this road signal do not comprise digital watermarking or digital watermarking incorrect time, detect next road signal.
3. the breakdown judge of television broadcasting signal according to claim 1 and 2 and changing method, wherein, when whether correctly detecting digital watermarking, if the digital watermarking detected continuous wrong time is not more than preset time threshold, then thinks that digital watermarking is correct.
4. the breakdown judge of television broadcasting signal according to claim 3 and changing method, wherein, described time threshold is 3-5 second.
5. the breakdown judge of television broadcasting signal according to claim 1 and 2 and changing method, wherein, described television broadcasting signal is sdi signal.
6. the breakdown judge of television broadcasting signal according to claim 1 and 2 and changing method, wherein, is also included in before described television broadcasting signal broadcasts, broadcasts at it step that file increases digital watermarking.
7. the breakdown judge of television broadcasting signal and a switched system, wherein, comprise
Whether digital watermark detecting device, comprise digital watermarking for detecting television broadcasting signal that input through its signal input part, that come from broadcast system prime, and whether digital watermarking is correct, and according to testing result, export control command by its output; With
Multiselect one switch, it comprises multiple input, an output and at least one control end, described input connects the television broadcasting signal coming from broadcast system prime respectively, according to the control command coming from described digital watermark detecting device that control end receives, output end signal is switched to corresponding input end signal.
8. the breakdown judge of television broadcasting signal according to claim 7 and switched system, wherein, the input of described multiselect one switch connects multi-channel television broadcasting signal respectively and signal broadcast by pad, and the input of described digital watermark detecting device connects corresponding multi-channel television broadcasting signal respectively.
9. the breakdown judge of television broadcasting signal according to claim 8 and switched system, wherein, described multi-channel television broadcasting signal is for main broadcaster's signal and standbyly broadcast signal.
10. the breakdown judge of television broadcasting signal according to claim 7 and switched system, wherein, also comprise digital watermarking generator, and before broadcasting for described television broadcasting signal, broadcasting file at it increases digital watermarking.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510040783.0A CN104581393A (en) | 2015-01-27 | 2015-01-27 | Fault judging and switching method and system for television broadcasting signal |
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| CN201510040783.0A CN104581393A (en) | 2015-01-27 | 2015-01-27 | Fault judging and switching method and system for television broadcasting signal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107592579A (en) * | 2016-05-31 | 2018-01-16 | 马克西姆综合产品公司 | Apparatus and method for protecting real time security and safety-related video data |
| CN107645674A (en) * | 2017-09-15 | 2018-01-30 | 成都视达科信息技术有限公司 | A kind of video broadcasting method and system |
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Application publication date: 20150429 |