CN204578645U - A kind of multichannel audio-video frequency switched system - Google Patents
A kind of multichannel audio-video frequency switched system Download PDFInfo
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- CN204578645U CN204578645U CN201520091016.8U CN201520091016U CN204578645U CN 204578645 U CN204578645 U CN 204578645U CN 201520091016 U CN201520091016 U CN 201520091016U CN 204578645 U CN204578645 U CN 204578645U
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Abstract
The utility model provides a kind of multichannel audio-video frequency switched system, comprise single-chip microcomputer, Audio conversion integrated circuit, video switch integrated circuit, first audio frequency and video input interface, second audio frequency and video input interface, the audio output interface of external audio frequency playback equipment and the video output interface of external connection display equipment, the I2C signal that described Audio conversion integrated circuit and described video switch integrated circuit export according to described single-chip microcomputer, synchronism switching inputs to the audio-video signal of described Audio conversion integrated circuit and described video switch integrated circuit, and by described audio output interface and described video output interface synchronism output to audio-frequence player device and display device.The utility model can realize the synchronism switching of audio-video signal, can be applicable to the occasions such as school's multi-media classroom teaching, system itself, as road audio frequency and video, has the audio input interface of independently External microphone, when any road audio frequency and video are as output, this microphone all can normally use.
Description
Technical field
The utility model relates to audio and video playing technical field, more particularly, relates to a kind of multichannel audio-video frequency switched system.
Background technology
At present in the scenes such as multi-media classroom teaching, company's meeting, hotel's meeting, owing to only having a display unit (as display or projecting apparatus or TV screen) and one group of audio amplifier, therefore, can only an external road audio & video equipment play during use.And in practice, various audio & video equipment often occurs simultaneously, such as television set, DVD, power amplifier, projector, notebook computer, video tape recorder etc.Like this, just need the multichannel audio-video frequency signal exported by these equipment to select on demand to switch, make the audio frequency and video of a road audio & video equipment be transported in output channel, play.This shows, be necessary the switched system that a kind of multichannel audio-video frequency equipment is provided.
But in some multichannel audio-video frequency switching device, Voice & Video is when switching, can not arrive synchronous, make to see that picture a period of time just has corresponding sound to occur, and, some switching devices, before the handover, the voice signal that microphone gathers can be play when equipment carries out audio and video playing simultaneously, and when switching to another kind of audio & video equipment, as notebook computer, no longer can play the voice signal that microphone gathers when equipment carries out audio and video playing, namely microphone can not normally use.
Utility model content
The technical problems to be solved in the utility model is, the defect of multichannel audio-video frequency switching device in the needs switched for multichannel audio-video frequency and prior art, provides a kind of multichannel audio-video frequency switched system.
The utility model solves the technical scheme that its technical problem adopts: provide a kind of multichannel audio-video frequency switched system, it is characterized in that, this system comprises single-chip microcomputer, Audio conversion integrated circuit, video switch integrated circuit, the first audio frequency and video input interface, the second audio frequency and video input interface, the audio output interface of external audio frequency playback equipment and the video output interface of external connection display equipment, wherein: the output of described single-chip microcomputer is connected with the control end of described Audio conversion integrated circuit and described video switch integrated circuit respectively; Described first audio frequency and video input interface and described second audio frequency and video input interface are connected with the input of described Audio conversion integrated circuit and described video switch integrated circuit respectively; Described audio output interface is connected with the output of described Audio conversion integrated circuit, and described video output interface is connected with the output of described video switch integrated circuit; The I2C signal that described Audio conversion integrated circuit and described video switch integrated circuit export according to described single-chip microcomputer, synchronism switching inputs to the audio-video signal of described Audio conversion integrated circuit and described video switch integrated circuit, and by described audio output interface and described video output interface synchronism output to audio-frequence player device and display device.
In above-mentioned multichannel audio-video frequency switched system, described system also comprises motherboard platform harmony the core of the card sheet, and described motherboard platform and sound card chip are connected with the input of described Audio conversion integrated circuit and described video switch integrated circuit respectively; Described motherboard platform is made up of Intel H61 high-speed chip group and Intel Duo two generation processor.
In above-mentioned multichannel audio-video frequency switched system, described system also comprises single audio frequency input interface for External microphone and microphone module, and the input of described microphone module is connected with described single audio frequency input interface, output is connected with described audio output interface.
In above-mentioned multichannel audio-video frequency switched system, described system also comprises infrared remote control Receiver and Infrared remote controller, and described infrared remote control Receiver is connected with the input of described single-chip microcomputer.
In above-mentioned multichannel audio-video frequency switched system, described single-chip microcomputer comprises STC12C5A60S2 chip.
In above-mentioned multichannel audio-video frequency switched system, described Audio conversion integrated circuit is made up of PT2313E chip, and described video switch integrated circuit is made up of PI3V520 chip.
In above-mentioned multichannel audio-video frequency switched system, described sound card chip is ALC662 chip.
In above-mentioned multichannel audio-video frequency switched system, described microphone module comprises the power supply circuits, power amplifier and the volume control circuit that connect successively.
In above-mentioned multichannel audio-video frequency switched system, described power supply circuits comprise MAX764/5/6 chip; Described power amplifier comprises NE5532 chip; Described volume control circuit comprises PT2313E chip.
In above-mentioned multichannel audio-video frequency switched system, described first audio frequency and video input interface and described second audio frequency and video input interface include audio input interface and video input interface.
The beneficial effect implementing multichannel audio-video frequency switched system of the present utility model has: can be applicable to school's multi-media classroom teaching, company's meeting, the occasions such as hotel's meeting; When not external audio & video equipment, system itself is as road audio frequency and video; System comprises two-way audio frequency and video input interface, can other audio & video equipments external, as notebook computer; System has infrared remote control Receiver, can connect Infrared remote controller, selects audio & video equipment as output by Infrared remote controller, realizes the synchronism switching of audio frequency and video; System has the audio input interface of independently External microphone, and when any road audio frequency and video are as output, this microphone all can normally use.
Accompanying drawing explanation
Fig. 1 is the structure chart of the multichannel audio-video frequency switched system of the utility model embodiment.
Fig. 2 is the circuit diagram of the microphone module in Fig. 1.
Embodiment
The utility model provides a kind of multichannel audio-video frequency switched system, this system is using Intel H61 high-speed chip group and Intel Duo two generation processor (CPU) as motherboard platform, by Infrared remote controller remote control single-chip microcomputer, single-chip microcomputer exports I2C signal, make it to control Audio conversion integrated circuit and video switch integrated circuit, thus realize the synchronism switching of three road Voice & Videos.
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, it is the structure chart of the multichannel audio-video frequency switched system of the utility model embodiment, this system comprises motherboard platform 111 harmony the core of the card sheet 112, for providing a road audio-video signal, wherein, motherboard platform 111 is made up of Intel H61 high-speed chip group and Intel Duo two generation processor (CPU); Sound card chip 112 is ALC662 chip, is connected with Intel H61 high-speed chip group.
In the present embodiment, this system also comprises the first audio frequency and video input interface 105 and the second audio frequency and video input interface 106, wherein, first audio frequency and video input interface 105 is for connecting external computer, one road audio-video signal is provided, such as notebook computer, it comprises audio input interface and video input interface; Second audio frequency and video input interface 106 is for connecting the equipment such as outside DVD player, and provide a road audio-video signal, it comprises audio input interface and video input interface.It should be noted that, audio input interface and video input interface are according to different external equipments, and its interface type is arranged to the distinct interface corresponding to external equipment.
In the present embodiment, this system also comprises Audio conversion IC (Integrated Circuit, integrated circuit) 101 and video switch IC 102, wherein, Audio conversion IC 101 is made up of PT2313E chip, and then configure the pin circuitry of this chip, make it form complete integrated circuit, its input is connected with the audio interface of sound card chip 112, first audio-video interface 105 and the audio interface of the second audio-video interface 106 respectively; Video switch IC 102 is made up of PI3V520 chip, and then configure the pin circuitry of this chip, make it form complete integrated circuit, its input is connected with the video interface of Intel H61 high-speed chip group, the first audio-video interface 105 and the video interface of the second audio-video interface 106 respectively.
In the present embodiment, this system also comprises single-chip microcomputer 103, infrared remote control Receiver 104 and Infrared remote controller 113, infrared remote control Receiver 104 is connected with the input of single-chip microcomputer 103, the output of single-chip microcomputer 103 is connected with the control end of Audio conversion IC 101 and video switch IC 102 respectively, wherein, single-chip microcomputer 103 comprises STC12C5A60S2 chip; Infrared remote controller 113 comprises microcontroller and the keyboard be attached thereto, infrared receiver and radiating circuit, and this part belongs to prior art, does not repeat them here.
Infrared remote controller 113 carrys out control single chip computer 103 by infrared remote control Receiver 104, single-chip microcomputer 103 exports I2C signal, and then by I2C signal controlling Audio conversion IC 101 and video switch IC 102 synchronism switching, by inputing to the audio-video signal synchronism switching of Audio conversion IC 101 and video switch IC 102 to audio output interface 107 and video output interface 108, audio-visual synchronization is exported.
In the present embodiment, the audio-frequence player devices such as audio output interface 107 external speaker, with playback of audio information; Video output interface 108 external connection display equipment, with display video information.
In the present embodiment, this system also comprises single audio frequency input interface 109 and microphone module 110, and wherein, single audio frequency input interface 109 is for External microphone (MIC, microphone); The input of microphone module 110 is connected with single audio frequency input interface 109, output is connected with audio output interface 107, and concrete circuit structure will be described in detail below, for saving space, repeats in this step.
When external microphone works, MIC signal inputs to the input of microphone module 110 through single audio frequency input interface 109, and exports external audio-frequence player device to through the output of microphone module 110.
As shown in Figure 2, be the circuit diagram of the microphone module in Fig. 1, microphone module 110 comprises the power supply circuits 201, power amplifier 202 and the volume control circuit 203 that connect successively, wherein, power supply circuits 201 provide power supply for giving microphone module 110, and it comprises MAX764/5/6 chip; Power amplifier 202 is for amplifying MIC signal, and it comprises NE5532 chip; Volume control circuit 203 is for regulating the MIC signal after amplification, and to export suitable volume, it comprises PT2313E chip; The output of microphone module 110 comprises L channel and exports and R channel output.
In the present embodiment, in power amplifier 202, combining power amplification circuit, but be not limited thereto by two NE5532 chip-in series, can also be other combining forms, or is formed by more than three NE5532 chip portfolios.
Summary, multichannel audio-video frequency switched system of the present utility model itself can export as road audio frequency and video, and also comprise two-way audio frequency and video input interface, can other audio & video equipments external; Meanwhile, the synchronism switching of three tunnel audio frequency and video has been carried out by Infrared remote controller; In addition, system has the audio input interface of independently External microphone, and when any road audio frequency and video are as output, this microphone all can normally use.
The above; be only the utility model preferably embodiment; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claim.
Claims (10)
1. a multichannel audio-video frequency switched system, it is characterized in that, this system comprises single-chip microcomputer (103), Audio conversion integrated circuit (101), video switch integrated circuit (102), first audio frequency and video input interface (105), second audio frequency and video input interface (106), the audio output interface (107) of external audio frequency playback equipment and the video output interface (108) of external connection display equipment, wherein: the output of described single-chip microcomputer (103) is connected with the control end of described Audio conversion integrated circuit (101) and described video switch integrated circuit (102) respectively, described first audio frequency and video input interface (105) and described second audio frequency and video input interface (106) are connected with the input of described Audio conversion integrated circuit (101) and described video switch integrated circuit (102) respectively, described audio output interface (107) is connected with the output of described Audio conversion integrated circuit (101), and described video output interface (108) is connected with the output of described video switch integrated circuit (102), the I2C signal that described Audio conversion integrated circuit (101) and described video switch integrated circuit (102) export according to described single-chip microcomputer, synchronism switching inputs to the audio-video signal of described Audio conversion integrated circuit (101) and described video switch integrated circuit (102), and by described audio output interface (107) and described video output interface (108) synchronism output to audio-frequence player device and display device.
2. according to the multichannel audio-video frequency switched system described in claim 1, it is characterized in that, described system also comprises motherboard platform (111) harmony the core of the card sheet (112), and described motherboard platform (111) and sound card chip (112) are connected with the input of described Audio conversion integrated circuit (101) and described video switch integrated circuit (102) respectively; Described motherboard platform is made up of Intel H61 high-speed chip group and Intel Duo two generation processor.
3. according to the multichannel audio-video frequency switched system described in claim 1, it is characterized in that, described system also comprises single audio frequency input interface (109) for External microphone and microphone module (110), and the input of described microphone module (110) is connected with described single audio frequency input interface (109), output is connected with described audio output interface (107).
4. according to the multichannel audio-video frequency switched system described in claim 1, it is characterized in that, described system also comprises infrared remote control Receiver (104) and Infrared remote controller (113), and described infrared remote control Receiver (104) is connected with the input of described single-chip microcomputer (103).
5. according to the multichannel audio-video frequency switched system described in claim 1, it is characterized in that, described single-chip microcomputer comprises STC12C5A60S2 chip.
6. according to the multichannel audio-video frequency switched system described in claim 1, it is characterized in that, described Audio conversion integrated circuit (101) is made up of PT2313E chip, and described video switch integrated circuit (102) is made up of PI3V520 chip.
7. according to the multichannel audio-video frequency switched system described in claim 2, it is characterized in that, described sound card chip is ALC662 chip.
8. according to the multichannel audio-video frequency switched system described in claim 3, it is characterized in that, described microphone module (110) comprises the power supply circuits (201), power amplifier (202) and the volume control circuit (203) that connect successively.
9. according to Claim 8 described in multichannel audio-video frequency switched system, it is characterized in that, described power supply circuits (201) comprise MAX764/5/6 chip; Described power amplifier (202) comprises NE5532 chip; Described volume control circuit (203) comprises PT2313E chip.
10. the multichannel audio-video frequency switched system according to any one of claim 1-9, it is characterized in that, described first audio frequency and video input interface (105) and described second audio frequency and video input interface (106) include audio input interface and video input interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520091016.8U CN204578645U (en) | 2015-02-09 | 2015-02-09 | A kind of multichannel audio-video frequency switched system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520091016.8U CN204578645U (en) | 2015-02-09 | 2015-02-09 | A kind of multichannel audio-video frequency switched system |
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| CN204578645U true CN204578645U (en) | 2015-08-19 |
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| CN201520091016.8U Expired - Fee Related CN204578645U (en) | 2015-02-09 | 2015-02-09 | A kind of multichannel audio-video frequency switched system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114338614A (en) * | 2021-12-06 | 2022-04-12 | 广东广播电视台 | Real-time audio and video conversation system capable of switching in real time |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114338614A (en) * | 2021-12-06 | 2022-04-12 | 广东广播电视台 | Real-time audio and video conversation system capable of switching in real time |
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Granted publication date: 20150819 Termination date: 20200209 |
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| CF01 | Termination of patent right due to non-payment of annual fee |