CN104580935B - HDMI audio and video switching devices - Google Patents
HDMI audio and video switching devices Download PDFInfo
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- CN104580935B CN104580935B CN201510024388.3A CN201510024388A CN104580935B CN 104580935 B CN104580935 B CN 104580935B CN 201510024388 A CN201510024388 A CN 201510024388A CN 104580935 B CN104580935 B CN 104580935B
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Abstract
The invention discloses a kind of HDMI audio and video switching device, including at least two HDMI input interfaces, video switcher, HDMI output interface, SPDIF output interfaces, microcontroller and key-press module；Wherein, the audio and video input terminal of video switcher and at least two HDMI input interfaces, for the HDMI signals that one of at least two HDMI interface is selected to export in response to video switching signal；The video output terminals of video switcher are connect with HDMI output interface, are exported for exporting high-definition video signal to the HDMI output interface；First audio output of video switcher is connect with SPDIF output interfaces, for exporting the first digital audio and video signals to SPDIF output interfaces；Key-press module includes at least a switching key, and the first control terminal of microcontroller is connect with video switcher, and the input terminal of microcontroller is connect with key-press module.The device of the invention can realize the switching output of multichannel HDMI signals.
Description
Technical field
The present invention relates to audio and video control technology field more particularly to a kind of HDMI audio and video switching devices.
Background technology
HDMI is high-definition multimedia interface, and HDMI interface can provide the up to data transfer bandwidth of 5Gbps, can be with
Transmit audio signal and high definition video signal without compression.Present family or market are regarded there are many sound based on HDMI signals
Frequency playback equipment, these HDMI signal output apparatus need to be wired to respectively in the display equipment of compatible high-definition signal, still,
HDMI signal output apparatus and display equipment quantity not necessarily match or it is certain display equipment often to replace display it is different
The program of HDMI signal output apparatus, and same display equipment can not access more simultaneously without enough HDMI signaling interfaces
Platform HDMI signal output apparatus brings very big inconvenience to using.In view of this, market can be to multichannel HDMI signals there is an urgent need for one kind
Channel implements switching HDMI audio and video switching devices.
Invention content
A kind of HDMI audio and video switching device is provided it is an object of the invention to overcome of the prior art insufficient, the dress
The switching output of multichannel HDMI signals can be realized by putting.
Technical solution is used by the present invention solves prior art problem：A kind of HDMI audio and video switching device, including
At least two HDMI input interfaces, video switcher, HDMI output interface, SPDIF output interfaces, microcontroller and button mould
Block；
Wherein, at least two HDMI input interfaces are used for defeated to receive video source from external different video source connection
The HDMI signals gone out；
The audio and video input terminal of the video switcher and at least two HDMI input interfaces, cut for responding video
The HDMI signals for changing signal and one of described at least two HDMI interface being selected to export；The video output terminals of the video switcher
It connect with the HDMI output interface, is exported for exporting high-definition video signal to the HDMI output interface；The video is cut
First audio output of parallel operation is connect with the SPDIF output interfaces, for exporting the first digital audio and video signals to described
SPDIF output interfaces；
The key-press module includes at least a switching key, and the first control terminal and the video of the microcontroller switch
Device connects, and the input terminal of the microcontroller is connect with the key-press module, for according to the first of the switching key the triggering
Signal generates the video switching signal.
Preferably, earphone input interface is further included, analog signal turns digital efm signal, analog switching circuit, power amplifier list
Member and loudspeaker；
The earphone input interface is used to connect the first external audio-source to receive the first analog audio signal, the mould
Intend signal to turn digital efm signal and connect with the earphone input interface, for first analog audio signal to be converted to the
Two digital audio and video signals；
The input terminal of the analog switching circuit and the analog signal turn the of digital efm signal and video switcher
Two audio outputs connect, and are exported with receiving second digital audio and video signals and the second audio output of the video switcher
Third digital audio and video signals, the output terminal of the analog switching circuit is connect with the power amplifier unit, for responding the first sound
Frequency switching signal and the second digital audio and video signals or third digital audio and video signals is selected to export to the power amplifier unit；
The power amplifier unit is connect with the loudspeaker, for second digital audio and video signals or third digital audio to be believed
Number amplification after exported by the loudspeaker；
Second control terminal of the microcontroller is connect with the analog switching circuit, for according to the switching key
Second trigger signal generates the Audio conversion signal.
Preferably, it further includes fiber optic receiver and fiber-optic signal turns digital efm signal, the fiber optic receiver is used to connect
The second external audio-source is connect with reception optical fiber signal, the fiber-optic signal turns digital efm signal and connects with the fiber optic receiver
It connects, for the fiber-optic signal to be converted to the 4th digital audio and video signals；
The input terminal of the analog switching circuit also turns digital efm signal with fiber-optic signal and connect, for responding the second sound
Frequency switching signal and the 4th digital audio and video signals is selected to export to the power amplifier unit；
The microprocessor is additionally operable to generate second Audio conversion according to the third trigger signal of the switching key
Signal.
Preferably, it further includes digital signal revolving die and intends signal element and headset output interface, the digital signal revolving die is intended
Signal element is connect with the output terminal of the analog switching circuit, for by second digital audio and video signals, third number sound
Frequency signal is converted or the 4th digital audio and video signals are converted to the second analog audio signal and are exported by the headset output interface.
Preferably, the power amplifier unit is also associated with supper bass driver, and the supper bass driver is connected with supper bass
Output interface.
Preferably, the microcontroller is connected with an infrared receiving terminal, for receiving the telecommand of external remote.
Preferably, the SPDIF output interfaces include optical fiber output interface and coaxial output interface.
Preferably, the video switcher uses SIL9533 chips.
The beneficial effects of the invention are as follows：HDMI audio and video switching device provided by the invention, can will at least two-way HDMI
Video source is connected to same video display apparatus, then the high definition at least two-way HDMI video source can be realized by video switcher
Vision signal switching output.In this way, user cost can be reduced, user experience is improved.
Description of the drawings
Fig. 1 is the functional-block diagram of HDMI audio and video switching device in the embodiment of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that term " first ", " second " are only used for description purpose, and cannot
It is interpreted as indicating or implies relative importance or imply the quantity of the technical characteristic indicated by indicating.Define as a result, " the
One ", one or more this feature can be expressed or be implicitly included to the feature of " second ".In the description of the present invention,
" multiple " are meant that two or more, unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or be integrally connected；It can be machine
Tool is connected or is electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be two members
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
With reference to shown in Fig. 1, an embodiment of the present invention provides a kind of HDMI audio and video switching device, including at least two HDMI
Input interface, video switcher 13, HDMI output interface 14, SPDIF output interfaces, microcontroller 28 and key-press module 29.
Specifically, at least two HDMI input interfaces are used to connect to receive video source output from external different video source
HDMI signals.Such as in example described in Fig. 1, HDMI input interfaces are three, and the first HDMI input interfaces 10, the 2nd HDMI are defeated
11 and the 3rd HDMI input interfaces 12 of incoming interface, wherein, the first HDMI input interfaces 10 are used to connect the first external video source
31 to receive the first HDMI signals of the first video source 31 output, and the 2nd HDMI input interfaces 11 are used for and the second external video
Source 32 connects the 2nd HDMI signals to receive the output of the second video source 32, and the 3rd HDMI input interfaces 12 are used for and external the
Three video sources 33 connect the 3rd HDMI signals to receive the output of third video source 33.First video source 31, the second video source 32
And third video source 33 can play the playback equipment of HDMI HD videos, the first video source 31, the second video source 32
And third video source 33 is respectively as three road video inputs to video switcher 13.
The audio and video input terminal of video switcher 13 and at least two HDMI input interfaces, for responding video switching signal
And the HDMI signals that one of described at least two HDMI interface is selected to export.The video output terminals of video switcher 13 with it is described
HDMI output interface 14 connects, and is exported for exporting high-definition video signal to the HDMI output interface 14；The video switching
First audio output of device 13 is connect with the SPDIF output interfaces, for exporting the first digital audio and video signals to described
SPDIF output interfaces.That is, video switcher 13 can select in first, second, third video source 33 it is arbitrary all the way
HDMI signals access, and the high-definition video signal in selected HDMI signals is exported to HDMI output interface 14.And for quilt
The first digital audio and video signals in the HDMI signals of selection are exported by SPDIF output interfaces.
HDMI output interface 14 is used to connect external video display apparatus 34, by the first HDMI signals, the 2nd HDMI
Selected HDMII signals are exported to the video display apparatus 34 in signal or the 3rd HDMI signals.That is, in video
A HDMI letter in the first HDMI signals, the 2nd HDMI signals or the 3rd HDMI signals can be selected under the control of switch 13
Number, and the high-definition video signal in the selected HDMI signals is directly exported into video display apparatus 34 and is shown.
It is understood that SPDIF output interfaces can include optical fiber output interface 16 and coaxial output interface 15, also
It is that can export the first digital audio and video signals by optical fiber output or by coaxial cable.
Key-press module 29 includes at least a switching key, the first control terminal of microcontroller 28 and the video switcher 13
Connection, the input terminal of the microcontroller 28 are connect with the key-press module 29, for being touched according to the first of the switching key
It signals to generate the video switching signal.In this way, the selection that user can carry out video source by switching key switches output,
Such as the high-definition video signal in the first video source 31 is selected to be directly output to video display apparatus by HDMI output interface 14
34 etc..
It is understood that key-press module 29 can also including volume button etc., be also associated with USB on microcontroller 28 and connect
Mouth and communication serial port etc..
According to HDMI audio and video switching device provided by the invention, can will at least two-way HDMI video source be connected to it is same
Video display apparatus 34, then can realize that the high-definition video signal at least two-way HDMI video source switches by video switcher 13
Output.In this way, user cost can be reduced, user experience is improved.
In a preferred embodiment of the invention, earphone input interface 17 is further included, analog signal turns digital signal list
Member 18, analog switching circuit 19, power amplifier unit 20 and loudspeaker 21.
Earphone input interface 17 (such as 3.5mm earphone sockets) is for connecting the first external audio-source 35 to receive first
Analog audio signal, the analog signal turn digital efm signal 18 and are connect with the earphone input interface 17, for by described in
First analog audio signal is converted to the second digital audio and video signals.
The input terminal of analog switching circuit 19 and the analog signal turn digital efm signal 18 and video switcher 13
Second audio output connects, to receive 13 second audio output of second digital audio and video signals and the video switcher
The third digital audio and video signals of output, the output terminal of the analog switching circuit 19 is connect with the power amplifier unit 20, for ringing
It answers the first Audio conversion signal and the second digital audio and video signals or third digital audio and video signals is selected to export to the power amplifier unit
20.Power amplifier unit 20 is connect with the loudspeaker 21, for second digital audio and video signals or third digital audio and video signals to be put
It is exported after big by the loudspeaker 21.
That is, there is two-way audio input, i.e., inputted by earphone input interface 17 and believed by analog signal revolution word
The second digital audio and video signals that number unit 18 is converted and the third digital audio and video signals removed by video switcher 13.Second number
One of them is exported to power amplifier unit 20 by the control of analog switching circuit 19 for word audio signal, third digital audio and video signals, then
By power amplifier unit 20 export by loudspeaker 21 after signal amplification.That is, the HDMI audio and video switching devices of the present invention
Included power amplifier, the second digital audio and video signals or third digital audio and video signals lead to after signal amplification being carried out by power amplifier unit 20
Loudspeaker 21 are crossed to export.
Second control terminal of microcontroller 28 is connect with the analog switching circuit 19, for according to the switching key
Second trigger signal generates the Audio conversion signal.In this way, for Audio conversion output can be carried out by switching key.
In one embodiment of the invention, it further includes fiber optic receiver 26 and fiber-optic signal turns digital efm signal 27,
Fiber optic receiver 26 is used to connect the second external audio-source 36 with reception optical fiber signal, and fiber-optic signal turns digital efm signal 27
It is connect with the fiber optic receiver 26, for the fiber-optic signal to be converted to the 4th digital audio and video signals.
The input terminal of analog switching circuit 19 also turns digital efm signal 27 with fiber-optic signal and connect, for responding the second sound
Frequency switching signal and the 4th digital audio and video signals is selected to export to the power amplifier unit 20.That is, fiber optic receiver 26 is made
For third road audio input, first pass through fiber-optic signal and turn digital efm signal 27 fiber-optic signal is converted into the 4th digital audio letter
Number, then using the 4th digital audio and video signals as in third road audio input to analog switching circuit 19.Analog switching circuit 19 exists
Under the control of second Audio conversion signal, the 4th digital audio and video signals can be controlled to export to power amplifier unit 20, then pass through work(
It is exported after putting the amplification of 20 signal of unit by loudspeaker 21.
Microprocessor is additionally operable to generate the second Audio conversion signal according to the third trigger signal of the switching key.
More favorably, power amplifier unit 20 is also associated with supper bass driver 22, and the supper bass driver 22 is connected with
Supper bass output interface 23.In this way, while audio is exported by loudspeaker 21, there is supper bass effect.
In another embodiment of the present invention, it further includes digital signal revolving die and intends signal element 24 and headset output interface
25 (such as 3.5mm earphone sockets), digital signal revolving die are intended signal element 24 and are connect with the output terminal of analog switching circuit 19, used
In by the second digital audio and video signals, third digital audio and video signals conversion or the 4th digital audio and video signals be converted to the second analogue audio frequency
Signal simultaneously passes through headset output interface 25 and exports.That is, audio output includes, SPDIF is exported and earphone exports two-way audio
Output.
In one embodiment of the invention, microcontroller 28 is connected with an infrared receiving terminal 30, external distant for receiving
The telecommand of device is controlled, in this way, can realize that remote controler realizes the switching of audio and video.
It is understood that SIL9533 chips etc. may be used in video switcher 13.
In the description of this specification, reference term " one embodiment ", " example ", " is specifically shown " some embodiments "
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment of the present invention or example.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiments or example in combine in an appropriate manner.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art are not departing from the principle of the present invention and objective
In the case of can make changes, modifications, substitutions and variations to the above described embodiments within the scope of the invention.
Claims (7)
1. a kind of HDMI audio and video switching device, which is characterized in that including at least two HDMI input interfaces, video switcher,
HDMI output interface, SPDIF output interfaces, microcontroller and key-press module；
Wherein, at least two HDMI input interfaces are used to connect to receive video source output from external different video source
HDMI signals；
The audio and video input terminal of the video switcher and at least two HDMI input interfaces, for responding video switching letter
Number and select one of described at least two HDMI interface export HDMI signals；The video output terminals of the video switcher and institute
HDMI output interface connection is stated, is exported for exporting high-definition video signal to the HDMI output interface；The video switcher
The first audio output connect with the SPDIF output interfaces, for export the first digital audio and video signals it is defeated to the SPDIF
Outgoing interface；
The key-press module includes at least a switching key, and the first control terminal and the video switcher of the microcontroller connect
It connects, the input terminal of the microcontroller is connect with the key-press module, for the first trigger signal according to the switching key
Generate the video switching signal；
Further include earphone input interface, analog signal turns digital efm signal, analog switching circuit, power amplifier unit and loudspeaker；
The earphone input interface is used to connect the first external audio-source to receive the first analog audio signal, the simulation letter
Number turn digital efm signal connect with the earphone input interface, for first analog audio signal to be converted to the second number
Word audio signal；
The input terminal of the analog switching circuit turns the second sound of digital efm signal and video switcher with the analog signal
Frequency output terminal connects, to receive the of second digital audio and video signals and the output of the second audio output of the video switcher
Three digital audio and video signals, the output terminal of the analog switching circuit are connect with the power amplifier unit, are cut for responding the first audio
It changes signal and the second digital audio and video signals or third digital audio and video signals is selected to export to the power amplifier unit；
The power amplifier unit is connect with the loudspeaker, for second digital audio and video signals or third digital audio and video signals to be put
It is exported after big by the loudspeaker；
Second control terminal of the microcontroller is connect with the analog switching circuit, for second according to the switching key
Trigger signal generates the Audio conversion signal.
2. HDMI audio and video switching device according to claim 1, which is characterized in that further include fiber optic receiver and optical fiber
Signal turns digital efm signal, and the fiber optic receiver is used to connect the second external audio-source with reception optical fiber signal, described
Fiber-optic signal turns digital efm signal and is connect with the fiber optic receiver, for the fiber-optic signal to be converted to the 4th digital sound
Frequency signal；
The input terminal of the analog switching circuit also turns digital efm signal with fiber-optic signal and connect, and is cut for responding the second audio
It changes signal and the 4th digital audio and video signals is selected to export to the power amplifier unit；
The microcontroller is additionally operable to generate the second Audio conversion signal according to the third trigger signal of the switching key.
3. HDMI audio and video switching device according to claim 2, which is characterized in that further include digital signal revolving die and intend letter
Number unit and headset output interface, the digital signal revolving die intends signal element and the output terminal of the analog switching circuit connects
It connects, for second digital audio and video signals, the conversion of third digital audio and video signals or the 4th digital audio and video signals to be converted to the
Two analog audio signals are simultaneously exported by the headset output interface.
4. HDMI audio and video switching device according to claim 3, which is characterized in that the power amplifier unit is also associated with weight
Bass drivers, the supper bass driver are connected with supper bass output interface.
5. HDMI audio and video switching device according to claim 1, which is characterized in that it is red that the microcontroller is connected with one
Outer reception head, for receiving the telecommand of external remote.
6. HDMI audio and video switching device according to claim 1, which is characterized in that the SPDIF output interfaces include
Optical fiber output interface and coaxial output interface.
7. HDMI audio and video switching device according to claim 1, which is characterized in that the video switcher uses
SIL9533 chips.
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| CN201510024388.3A CN104580935B (en) | 2015-01-17 | 2015-01-17 | HDMI audio and video switching devices |
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| CN201510024388.3A CN104580935B (en) | 2015-01-17 | 2015-01-17 | HDMI audio and video switching devices |
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| CN104580935B true CN104580935B (en) | 2018-07-06 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106713786A (en) * | 2017-03-10 | 2017-05-24 | 锐达互动科技股份有限公司 | Multimedia high definition output controller for teaching |
| CN110475143B (en) * | 2018-05-10 | 2022-01-14 | 视联动力信息技术股份有限公司 | Switching method and device of HDMI video data |
| CN109254753B (en) * | 2018-09-27 | 2022-04-19 | 京东方科技集团股份有限公司 | Audio signal interface circuit and device, control method and playing equipment thereof |
| CN112188120A (en) * | 2020-10-09 | 2021-01-05 | 深圳市玩视科技有限公司 | Audio and video processing device and software upgrading system |
| CN112653856B (en) * | 2020-12-14 | 2024-02-27 | 中国华录集团有限公司 | Method for intelligently switching audio output equipment of laser projection television |
| CN116456043A (en) * | 2023-04-26 | 2023-07-18 | 北京阳光昌盛科技发展有限公司 | Intelligent HDMI switching system and HDMI switcher |
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