CN102602346A - Method for automatically switching audio and video signals of bus - Google Patents
Method for automatically switching audio and video signals of bus Download PDFInfo
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- CN102602346A CN102602346A CN201210069991XA CN201210069991A CN102602346A CN 102602346 A CN102602346 A CN 102602346A CN 201210069991X A CN201210069991X A CN 201210069991XA CN 201210069991 A CN201210069991 A CN 201210069991A CN 102602346 A CN102602346 A CN 102602346A
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Abstract
The invention relates to an automation control technology, in particular to a method for automatically switching audio and video signals of a bus. The method provided by the invention mainly comprises the steps of: automatically switching the outputs of the audio and video signals by using an audio and video signal switching system, and setting priority levels for the audio and video signals, thus timely outputting the audio and video signal with the top priority under any conditions. The method provided by the invention has the beneficial effects that the outputs of various vehicle-mounted audio and video output equipment can be automatically switched, therefore, the vehicle for the special purpose can automatically output signals as required at specific moments, the people in the vehicle can be timely and accurately reminded, a driver can drive the bus with less manual work, and the driving safety is improved. The method is especially applied to the bus.
Description
Technical field
The present invention relates to automated control technology, the method that a kind of specifically bus digital television signal automaticallyes switch.
Background technology
Along with extensively carrying out of domestic terrestrial DTV, the user of vehicle-mounted digital television just progressively increases.At present; Possibly possess multiple different playing audio/video simultaneously in the same vehicle; As DVD player that is equipped with simultaneously and mobile digital TV, and bus need possess specific function because of it: when arriving at a station, the reporting station system sounding; Prompt passengers site information etc., also needing the specific audio output system of additive incrementation is bus stop reporting system.The subject matter of bus audio frequency and video outdevice existence at present is between multiple audio-video signal, to automatically switch, and brings a lot of inconvenience thus.
Summary of the invention
The problem that the present invention solved has proposed a kind of method that can realize the audio-video signal automatic switchover of digital television receiver, DVD player and bus stop reporting system exactly.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: the method that a kind of bus audio-video signal automaticallyes switch, it is characterized in that, and may further comprise the steps:
A. start car bus audio-video signal switched system;
B. audio-video interface output audiovisual frequency in digital TV signal detects current audio frequency and video incoming signal;
C. judge whether current audio frequency and video incoming signal comprises other audio-video signals, if, then get into steps d, if not, then get back to step b;
Whether the audio-video signal of d. judging current input comprises particular audio signal, if, then get into step e, if not, then get into step f;
E. COBBAIF output particular audio signal, and detection judges whether this particular audio signal input finishes, if, then get back to step b, if not, continue this step;
Whether the audio-video signal of f. judging current input is other audio-video signals, if, then get into step g, if not, then get back to step b;
G. other audio-video signals of audio-video interface output judge whether the audio-video signal of current input comprises particular audio signal, if, then get into step h, if not, then get into step I;
H. COBBAIF output particular audio signal, and detection judges whether this particular audio signal input finishes, if, then get back to step g, if not, continue this step;
I. judge whether other audio-video signal inputs finish, if, then get back to step b, if not, then get back to step g.
The technical scheme that the present invention is total; Audio frequency input through specific is set to limit priority, when any sound signal of output, all preferentially exports and satisfies particular audio signal, need not manual intervention; Advantage is to export the signal that particular moment needs automatically; Can between multiple audio-video signal, automatically switch simultaneously, reduce vehicle driver's M/C, effectively improve traffic safety.
Concrete, said other audio-video signals are the DVD audio-video signal.
More specifically, said particular audio signal is the bus stop reporting sound signal.
Beneficial effect of the present invention does; Realize the output automatic switchover between the multiple vehicle-mounted audio frequency and video outdevice; Make the vehicle that possesses special purpose can export the signal that needs automatically in particular moment; Thereby the personnel in can prompting vehicle have promptly and accurately reduced the M/C of chaufeur simultaneously, have improved traffic safety.
Description of drawings
Fig. 1 is the logic diagram of embodiment.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment, describe technical scheme of the present invention in detail:
A kind of method that realizes autonomous remote-health managing of the present invention, key step is: start vehicle-mounted digital television, the audio frequency and video of acquiescence are output as the audio-video signal of DTV; Begin to detect current audio frequency and video incoming signal simultaneously,, judge at first whether the audio-video signal of current input comprises particular audio signal if detect other audio-video signal input; If; Then preferentially export this particular audio signal, this signal output automatically switches to original sound signal after finishing, if the audio-video signal of current input is other audio-video signals; Then export other audio-video signals; Continue to judge whether the audio-video signal of current input comprises particular audio signal simultaneously,, behind the particular audio signal end of output, switch to other sound signal if having then preferentially export particular audio signal; If other audio-video signal end of output then automatically switches to the digital television receiver signal output.
Embodiment:
As shown in Figure 1; DTV on the bus, the output system of calling out the stops and vehicle-carrying DVD are connected with the audio-video signal switched system respectively; The audio-video signal switched system is connected with vehicle-mounted loudspeaker with vehicle-carrying display screen respectively, gives tacit consent to playing digital television signal after the system start-up, and this moment, vehicle-carrying display screen and vehicle-mounted loudspeaker were all exported the audiovisual frequency in digital TV signal; When the audio-video signal switched system has detected when calling out the stops output system signal; Just cut off the audiofrequency output of DTV, export the reporting station system sound signal simultaneously, behind reporting station system sound signal end of output, automaticallying switch feeds back out the sound signal of DTV; After having detected the DVD audio-video signal; Vehicle-carrying display screen and vehicle-mounted loudspeaker are all exported the DVD audio-video signal; When output DVD audio-video signal, when having detected when calling out the stops output system signal the audiofrequency output that just cuts off DVD; Export the reporting station system sound signal simultaneously, the sound signal of the DVD that behind reporting station system sound signal end of output, automaticallyes switch back; The automatic switchover of audio-video signal switched system feeds back out the audiovisual frequency in digital TV signal behind DVD audio-video signal end of output.
The concrete principle of work of embodiment is:
The sound signal of the DTV of the sound signal of reporting station system and process power amplifier is all sent in the audio frequency and video switched system; From the sound signal of station reporting instrument, extract signal simultaneously as detection signal; And detection signal is passed through amplifier amplify; More whether there is the reporting station system audiofrequency output at the VREF (Voltage Reference) of sending into comparator and comparator; Comparator will be exported positive electricity and be pressed onto control circuit when signal is imported, and passes through the sound signal of audio-video signal switched system switch output reporting station system, otherwise output receiver program audio signal; The audio-video signal of DVD and the audio-video signal of DTV are all sent in the audio-video signal switched system, by the audio-video signal switched system audio frequency and video output signal that automaticallyes switch.
By default; Audio-video signal switched system output digital television program audio frequency; No matter when the DVD audio-video signal, then export the DVD audio-video signal, when having detected the reporting station system input, be output digital television program audio frequency or DVD audio frequency; The audio-video signal switched system automatically switches to reporting station system output with closing television program audio or DVD audio frequency; When the reporting station system audiofrequency output finished, the audio-video signal switched system automatically switched to digital television program audio frequency or DVD audiofrequency output again.
Claims (3)
1. the method that the bus audio-video signal automaticallyes switch is characterized in that, may further comprise the steps:
A. start car bus audio-video signal switched system;
B. audio-video interface output audiovisual frequency in digital TV signal detects current audio frequency and video incoming signal;
C. judge whether current audio frequency and video incoming signal comprises other audio-video signals, if, then get into steps d, if not, then get back to step b;
Whether the audio-video signal of d. judging current input comprises particular audio signal, if, then get into step e, if not, then get into step f;
E. COBBAIF output particular audio signal, and detection judges whether this particular audio signal input finishes, if, then get back to step b, if not, continue this step;
Whether the audio-video signal of f. judging current input is other audio-video signals, if, then get into step g, if not, then get back to step b;
G. other audio-video signals of audio-video interface output judge whether the audio-video signal of current input comprises particular audio signal, if, then get into step h, if not, then get into step I;
H. COBBAIF output particular audio signal, and detection judges whether this particular audio signal input finishes, if, then get back to step g, if not, continue this step;
I. judge whether other audio-video signal inputs finish, if, then get back to step b, if not, then get back to step g.
2. the method that a kind of bus audio-video signal according to claim 1 automaticallyes switch is characterized in that said other audio-video signals are the DVD audio-video signal.
3. the method that a kind of bus audio-video signal according to claim 1 and 2 automaticallyes switch is characterized in that said particular audio signal is the bus stop reporting sound signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210069991XA CN102602346A (en) | 2012-03-16 | 2012-03-16 | Method for automatically switching audio and video signals of bus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210069991XA CN102602346A (en) | 2012-03-16 | 2012-03-16 | Method for automatically switching audio and video signals of bus |
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| CN102602346A true CN102602346A (en) | 2012-07-25 |
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| CN201210069991XA Pending CN102602346A (en) | 2012-03-16 | 2012-03-16 | Method for automatically switching audio and video signals of bus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102765349A (en) * | 2012-07-26 | 2012-11-07 | 东南（福建）汽车工业有限公司 | Voice prompting method for vehicle instrument |
| CN103079145A (en) * | 2012-12-26 | 2013-05-01 | 数源科技股份有限公司 | Novel vehicle-mounted multimedia player and implementation method thereof |
| CN103686546A (en) * | 2013-12-13 | 2014-03-26 | 大连现代高技术集团有限公司 | Method for controlling multichannel sound distributing and switching of vehicle-mounted terminal |
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| JP2009253385A (en) * | 2008-04-01 | 2009-10-29 | Sony Corp | Signal switching apparatus and control method of signal switching apparatus |
| CN201444346U (en) * | 2008-12-25 | 2010-04-28 | 中国华录集团有限公司 | Smart device on bus |
| CN201528379U (en) * | 2009-09-30 | 2010-07-14 | 福建新大陆通信科技有限公司 | Multifunctional vehicle-mounted digital television set-top box |
| CN102156450A (en) * | 2010-12-13 | 2011-08-17 | 青岛四方车辆研究所有限公司 | Carriage controller for train passenger information system |
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- 2012-03-16 CN CN201210069991XA patent/CN102602346A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1760638A (en) * | 2004-10-13 | 2006-04-19 | 菱科电子技术（中国）有限公司 | Car borne GPS navigation, video and audio system |
| JP2009253385A (en) * | 2008-04-01 | 2009-10-29 | Sony Corp | Signal switching apparatus and control method of signal switching apparatus |
| CN201444346U (en) * | 2008-12-25 | 2010-04-28 | 中国华录集团有限公司 | Smart device on bus |
| CN201528379U (en) * | 2009-09-30 | 2010-07-14 | 福建新大陆通信科技有限公司 | Multifunctional vehicle-mounted digital television set-top box |
| CN102156450A (en) * | 2010-12-13 | 2011-08-17 | 青岛四方车辆研究所有限公司 | Carriage controller for train passenger information system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102765349A (en) * | 2012-07-26 | 2012-11-07 | 东南（福建）汽车工业有限公司 | Voice prompting method for vehicle instrument |
| CN103079145A (en) * | 2012-12-26 | 2013-05-01 | 数源科技股份有限公司 | Novel vehicle-mounted multimedia player and implementation method thereof |
| CN103686546A (en) * | 2013-12-13 | 2014-03-26 | 大连现代高技术集团有限公司 | Method for controlling multichannel sound distributing and switching of vehicle-mounted terminal |
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Application publication date: 20120725 |