CN204316626U - HDMI audio frequency and video switching device shifter can be extended - Google Patents

Abstract

The utility model discloses one and can extend HDMI audio frequency and video switching device shifter, comprise a HDMI input interface, the 2nd HDMI input interface, netting twine input interface, a HDbaseT video transmitter receiving terminal, video switcher, HDMI output interface, a HDbaseT video transmitter transmitting terminal, netting twine output interface, microcontroller and key-press module etc.; The input of video switcher is connected with a HDMI input interface, the 2nd HDMI input interface, a HDbaseT video transmitter receiving terminal, the output of video switcher and HDMI output interface and a HDbaseT video transmitter transmitting terminal; One HDbaseT video transmitter transmitting terminal is connected with netting twine output interface; Key-press module at least comprises a switching key, and microcontroller is connected with described video switcher and key-press module.The utility model can realize multi-path high-definition vision signal and switch output, meanwhile, can realize high-definition video signal with HDbaseT Chief Technology Officer Distance Transmission.

Description

Extendable HDMI audio and video switching device

technical field

The utility model relates to the technical field of audio and video control, in particular to an extendable HDMI audio and video switching device.

Background technique

HDMI is a high-definition multimedia interface. The HDMI interface can provide data transmission bandwidth up to 5Gbps, and can transmit uncompressed audio signals and high-resolution video signals. Now there are many audio and video playback devices based on HDMI signals in homes or shopping malls. These HDMI signal output devices need to be connected to display devices compatible with high-definition signals. However, the number of HDMI signal output devices and display devices does not necessarily match, or Some display devices need to frequently change the programs displayed by different HDMI signal output devices, but the same display device does not have enough HDMI signal interfaces to connect multiple HDMI signal output devices at the same time, which brings great inconvenience to use. In view of this, there is an urgent need in the market for an HDMI audio and video switching device capable of switching multiple HDMI signal channels. In addition, for high-definition video signals such as HDMI signals, long-distance transmission cannot be realized, which brings great inconvenience to people's use.

Utility model content

The purpose of the utility model is to overcome the deficiencies in the prior art and provide an extendable HDMI audio and video switching device, which can realize multi-channel HDMI signal switching output, and at the same time, can realize HDMI signal long-distance transmission.

The technical solution adopted by the utility model to solve the problems of the prior art is: an extendable HDMI audio and video switching device, characterized in that it includes a first HDMI input interface, a second HDMI input interface, a network cable input interface, a first HDbaseT video Transmitter receiver, video switcher, HDMI output interface, first HDbaseT video transmitter transmitter, network cable output interface, SPDIF output interface, microcontroller and key module;

Wherein, the first HDMI input interface is used to receive a first HDMI signal from an external first video source, and the second HDMI input interface is used to receive a second HDMI signal from an external second video source; The network cable input interface is used to receive the first HDbaseT signal from the second HDbaseT video transmitter transmitter of the outside, and the first HDbaseT video transmitter receiver is connected to the network cable input interface to convert the first HDbaseT signal is the third HDMI signal;

The audio and video input end of the video switcher is connected with the first HDMI input interface, the second HDMI input interface, and the first HDbaseT video transmitter receiving end, for selecting and inputting the first HDMI signal in response to a video switching signal , the second HDMI signal or the third HDMI signal; the video output end of the video switcher is connected to the HDMI output interface and the first HDbaseT video transmitter transmitter for outputting high-definition video signals to the HDMI output interface or The first HDbaseT video transmitter receiver; the first audio output of the video switcher is connected to the SPDIF output interface for outputting the first digital audio signal to the SPDIF output interface;

The transmitting end of the first HDbaseT video transmitter is connected to the output interface of the network cable, and is used to convert the high-definition video signal into a second HDbaseT signal and output it to the external second HDbaseT video transmitter receiving terminal through the output interface of the network cable ;

The button module includes at least one switch button, the first control terminal of the microcontroller is connected to the video switcher, the input terminal of the microcontroller is connected to the button module, and is used to switch the button according to the first control terminal of the switch button. A trigger signal generates the video switching signal.

Preferably, it also includes an earphone input interface, an analog signal conversion unit, an audio switcher, a power amplifier unit and a speaker;

The earphone input interface is used to connect the external audio source 40 to receive the first analog audio signal, and the analog signal conversion unit is connected to the earphone input interface, and is used to convert the first analog audio signal into a second analog audio signal. digital audio signal;

The input end of the audio switcher is connected to the second audio output end of the analog signal to digital signal unit and the video switcher to receive the second digital audio signal and output the second audio output end of the video switcher The third digital audio signal; the first output end of the audio switcher is connected to the power amplifier unit, and is used to select the second digital audio signal or the third digital audio signal to output to the power amplifier unit in response to the audio switching signal;

The power amplifier unit is connected to the speaker, and is used to amplify the second digital audio signal or the third digital audio signal and output it from the speaker;

The second control terminal of the microcontroller is connected to the audio switcher, and is used to generate the audio switching signal according to the second trigger signal of the switching button.

Preferably, it also includes a digital signal-to-analog signal unit and a headphone output interface, and the digital signal-to-analog signal unit is connected to the audio switcher for converting the second digital audio signal or the third digital audio signal into The second analog audio signal is output through the earphone output interface.

Preferably, the power amplifier unit is further connected with a subwoofer driver, and the subwoofer driver is connected with a subwoofer output interface.

Preferably, the receiving end of the first HDbaseT video transmitter is connected with an infrared receiving head for receiving remote control commands from the remote controller of the third video source to control the third video source.

Preferably, the transmitting end of the first HDbaseT video transmitter is connected with an infrared transmitting head for transmitting remote control commands to control external video display devices.

Preferably, the receiving end of the first HDbaseT video transmitter and the receiving end of the second HDbaseT video transmitter adopt the VS100RX receiving chip of Valens Company, and the transmitting end of the first HDbaseT video transmitter and the transmitting end of the second HDbaseT video transmitter adopt Valens' VS100TX launch chip. the

Preferably, the SPDIF output interface includes an optical fiber output interface.

Preferably, the video switcher adopts EP9442 chip.

The beneficial effects of the utility model are: the extendable HDMI audio-video switching device provided by the utility model can connect at least three HDMI video sources to the same video display device, and then the first HDMI input interface, the second HDMI input interface can be realized through the video switcher. 2. The high-definition video signals of the HDMI input interface and the network cable input interface are switched and output to the HDMI output interface or the network cable output interface, that is, the switching output of multiple high-definition videos. In this way, user costs can be reduced and user experience can be improved. At the same time, the network cable input interface, the first HDbaseT video transmitter receiving end, the first HDbaseT video transmitter transmitting end, and the network cable output interface in the utility model can realize the long-distance transmission of the high-definition video signal of the third video source with HDbaseT technology.

Description of drawings

Fig. 1 is a schematic block diagram of an extendable HDMI audio-video switching device according to an embodiment of the present invention.

The realization of the purpose of the utility model, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the number of indicated technical features . Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present utility model, "plurality" means two or more, unless otherwise specifically defined.

In this utility model, unless otherwise specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

Referring to Fig. 1, the utility model provides an extendable HDMI audio and video switching device, comprising a first HDMI input interface 10, a second HDMI input interface 11, a network cable input interface 12, a first HDbaseT video transmitter receiving end 13 , a video switcher 14 , an HDMI output interface 15 , a first HDbaseT video transmitter transmitter 16 , a network cable output interface 17 , a microcontroller 31 and a button module 32 .

Specifically, the first HDMI input interface 10 is used to receive a first HDMI signal from an external first video source 34, and the second HDMI input interface 11 is used to receive a second HDMI signal from an external second video source 35. The network cable input interface 12 is used to receive the first HDbaseT signal from the external second HDbaseT video transmitter transmitter 37, and the first HDbaseT video transmitter receiver 13 is connected to the network cable input interface 12 for converting the first HDbaseT signal into a third HDMI signal.

That is to say, the first HDMI input interface 10 is used for connecting with the first external video source 34 to receive the first HDMI signal output by the first video source 34, and the second HDMI input interface 11 is used for connecting with the external second video source 35 is connected to receive the second HDMI signal output by the second video source 35 . The first video source 34 and the second video source 35 can be playback equipment capable of playing HDMI high-definition video, and the video signal output by the first video source 34 is the first HDMI signal, which is input to the video switcher by the first HDMI input interface 10 14 , and the video signal played and output by the second video source 35 is a second HDMI signal, which is input to the video switcher 14 through the second HDMI input interface 11 . That is, the first video source 34 and the second video source 35 are input to the video switcher 14 as two channels of video. The network cable input interface 12 generally can be an RJ45 interface, which is used to connect with the second HDbaseT video transmitter transmitter 37 of the outside to receive the first HDbaseT signal output by the second HDbaseT video transmitter transmitter 37, and then the first HDbaseT signal It is converted into a third HDMI signal by the first HDbaseT video transmitter receiver 13 and input to the video switcher 14 . The external second HDbaseT video transmitter transmitter 37 is connected to the third video source 36 . That is, the third video source 36 is transmitted to the network cable input interface 12 through the second HDbaseT video transmitter transmitter 37 as the third video, and then input to the video switcher 14 through the first HDbaseT video transmitter receiver 13 .

HDBaseT is a new high-definition video transmission technology. The HDBaseT Alliance was formed by LG, Samsung, Sony and other companies from Japan and South Korea, as well as Valens Semiconductor, an Israeli semiconductor company. It passed Intel's HDCP certification in 2009 and passed Intel's HDCP certification in 2010 At the end of June 2019, the official specification of HDBaseT 1.0 was determined. HDbaseT 1.0 supports a transmission rate of up to 20Gbps, and can perfectly support FULL 3D and 4K x 2K video formats. The transmission uses ordinary CAT5e/6 network cables for uncompressed transmission, and the connector also uses ordinary RJ45 connectors. The transmission distance reaches In addition, it also provides Ethernet function, 100W power supply capability (PoE) and other control signal channels. HDBaseT2.0 realizes the transition of HDBaseT from professional audio-visual to consumer electronics, and helps to establish a multimedia interconnected home solution. Category 6) brings together uncompressed high-definition video (including 4K), audio, power, Ethernet, control signals, and a power of up to 100W. It can provide 5Play function sets for multiple displays at the same time, and supports HDMI2.0, etc.

And the HDbaseT video transmitter transmitter and the HDbaseT video transmitter receiver in the utility model are exactly the HDbaseT video transmitter for transmitting uncompressed high-definition video (comprising 4K) based on HDbaseT done by the semiconductor company Valens Semiconductor of initiator Israel. The HDbaseT video transmitter includes an HDbaseT video transmitter transmitter and an HDbaseT video transmitter receiver, and the two are connected through a network cable, so that the purpose of long-distance transmission of uncompressed high-definition video signals can be achieved.

That is to say, the HDMI signal output by the third video source 36 can first be converted into the first HDbaseT signal by the second HDbaseT video transmitter transmitter 37, and then transmitted to the utility model through a network cable (such as a 100-meter network cable) to extend the HDMI audio signal. The network cable input interface 12 (RJ45 interface) of the video switching device converts the first HDbaseT signal into a third HDMI signal and inputs it to the video switcher 14 through the first HDbaseT video transmitter receiving end 13 inside. Since the 100-meter network cable can be connected between the network cable input interface 12 and the second HDbaseT video transmitter transmitter 37, so the third video source 36 and the extendable HDMI audio-video switching device of the present utility model can be far away from each other, so, played a role in extending the distance.

The audio-video input end of video switcher 14 is connected with described first HDMI input interface 10, second HDMI input interface 11, first HDbaseT video transmitter receiving end 13, is used for selecting input described first in response to video switching signal HDMI signal, the second HDMI signal or the third HDMI signal; the video output end of the video switcher 14 is connected with the HDMI output interface 15 and the first HDbaseT video transmitter transmitter 16 for outputting high-definition video signals to the Described HDMI output interface 15 or the first HDbaseT video transmitter receiving end 13; The first audio output end of described video switcher 14 is connected with described SPDIF output interface, for outputting the first digital audio signal to described SPDIF output interface . That is to say, the video switcher 14 can select any HDMI signal in the first, second, and third video sources 36 to be connected, and output the high-definition video signal in the selected HDMI signal to the HDMI output interface 15 or the network cable output interface17. However, the first digital audio signal in the selected HDMI signal can be output through the SPDIF output interface.

It can be understood that the SPDIF output interface may include an optical fiber output interface 22, that is, the first digital audio signal may be output through an optical fiber.

The HDMI output interface 15 is used for connecting an external video display device 39 to output the selected HDMI II signal from the first HDMI signal, the second HDMI signal or the third HDMI signal to the video display device 39 . That is to say, under the control of the video switcher 14, one of the first HDMI signal, the second HDMI signal or the third HDMI signal can be selected, and the high-definition video signal in the selected HDMI signal can be directly output to the video display The device 39 makes a display.

And the first HDbaseT video transmitter transmitter 16 is connected with the network cable output interface 17, and is used to convert the high-definition video signal into the second HDbaseT signal by the network cable output interface 17 output to the second HDbaseT video transmitter of the outside Receiver 38 . That is to say, the video switcher 14 can also select an HDMI signal in the first HDMI signal, the second HDMI signal or the third HDMI signal, and output the high-definition video signal in the selected HDMI signal to the first HDbaseT video signal. Transmitter transmitter 16 is converted into a second HDbaseT signal by the first HDbaseT video transmitter transmitter 16, and the second HDbaseT signal is then transmitted to the external first HDbaseT signal through a network cable (such as a 100-meter network cable) connected to the network cable output port. Two HDbaseT video transmitter receiving end 38, and then convert the second HDbaseT signal into high-definition video signal through the second HDbaseT video transmitter receiving end 38, and finally output to the video display device 21 for display.

The button module 32 includes at least one switch button, the first control terminal of the microcontroller 31 is connected with the video switcher 14, and the input terminal of the microcontroller 31 is connected with the button module 32 for switching buttons according to the The first trigger signal generates the video switching signal. In this way, the user can select and switch the output of the video source through the switch button, for example, select the high-definition video signal in the first video source 34 to directly output to the video display device 39 through the HDMI output interface 15, or through the network cable output interface 17 via the second The HDbaseT video transmitter receiving end 38 outputs to the video display device 21 . When outputting through the network cable output interface 17, because a 100-meter network cable can be connected between the network cable output interface 17 and the second HDbaseT video transmitter receiving end 38, the video display device 21 can be switched with the extendable HDMI audio and video of the present utility model The greater distance between the devices, thus, acts as a distance extension.

It can be understood that the button module 32 may also include volume buttons, etc., and the microcontroller 31 is also connected with a USB interface 33 and a communication serial port.

According to the extendable HDMI audio and video switching device provided by the present invention, the high-definition video signals of the first HDMI input interface 10, the second HDMI input interface 11 and the network cable input interface 12 can be switched and output to the HDMI output interface 15 through the video switcher 14 Or network cable output interface 17, that is, 3-way video input switches 2-way video output. Simultaneously, network line input interface 12, the first HDbaseT video transmitter receiving end 13, the first HDbaseT video transmitter transmitting end 16, network cable output interface 17 can realize the high-definition video signal of the 3rd video source 36 with HDbaseT technical length among the utility model. distance transmission.

In a preferred embodiment of the present invention, it also includes an earphone input interface 18 , an analog signal conversion unit 19 , an audio switcher 20 , a power amplifier unit 25 and a speaker 26 .

Specifically, the earphone input interface 18 (such as a 3.5mm earphone jack) is used to connect an external audio source 40 to receive the first analog audio signal, and the analog signal conversion unit 19 is connected to the earphone input interface 18 for connecting the The first analog audio signal is converted to a second digital audio signal.

The input end of audio switcher 20 is connected with the second audio output end of described analog signal to digital signal unit 19 and video switcher 14, to receive described second digital audio signal and described video switcher 14 second audio output The third digital audio signal output by the end; the first output end of the audio switcher 20 is connected to the power amplifier unit 25, and is used to select the second digital audio signal or the third digital audio signal to output to the power amplifier in response to the audio switching signal Unit 25. The power amplifier unit 25 is connected to the speaker 26 and is used to amplify the second digital audio signal or the third digital audio signal and output it from the speaker 26 .

That is to say, there are two audio inputs, namely the second digital audio signal input through the headphone input interface 18 and converted by the analog signal to digital signal unit 19 and the third digital audio signal stripped by the video switcher 14 . One of the second digital audio signal and the third digital audio signal is controlled by the audio switcher 20 to be output to the power amplifier unit 25 , and then the signal is amplified by the power amplifier unit 25 and then output through the speaker 26 . That is to say, the extendable HDMI audio-video switching device of the present invention has its own power amplifier, and the second digital audio signal or the third digital audio signal can be amplified by the power amplifier unit 25 and then output through the speaker 26 .

The second control terminal of the microcontroller 31 is connected to the audio switcher 20 for generating the audio switching signal according to the second trigger signal of the switching button. In this way, the user can perform audio switching output through the switching button.

In one embodiment of the present invention, it also includes a digital signal conversion analog signal unit 23 and an earphone output interface 24 (such as a 3.5mm earphone socket), and the digital signal conversion analog signal unit 23 is connected with the audio switcher 20, It is used for converting the second digital audio signal or the third digital audio signal into a second analog audio signal and outputting it through the headphone output interface 24 . That is to say, the audio output includes two audio outputs of SPDIF output and headphone output.

Optionally, the power amplifier unit 25 is also connected with a subwoofer driver 27 , and the subwoofer driver 27 is connected with a subwoofer output interface 28 . In this way, when the audio is output through the speaker 26, a subwoofer effect is provided.

In one embodiment of the present invention, because HDbaseT technology also supports infrared signal transmission. Therefore, in this embodiment, an infrared receiving head 29 is connected to the receiving end 13 of the first HDbaseT video transmitter, so that the third video source 36 can be controlled by receiving remote control commands from the remote controller of the third video source 36 .

More advantageously, the first HDbaseT video transmitter transmitter 16 is connected with an infrared transmitter 30, so that remote control instructions can be emitted to control the external video display device 21.

It should be noted that the first HDbaseT video transmitter receiving end 13 and the second HDbaseT video transmitter receiving end 38 in the utility model adopt the VS100RX receiving chip of Valens Company, and the first HDbaseT video transmitter transmitting end 16 and the second HDbaseT video transmitter receiving end 38 adopt Valens' VS100RX receiving chip. The second HDbaseT video transmitter transmitter 37 adopts the VS100TX transmitter chip of Valens Company. Video switcher 14 can adopt EP9442 chip.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structures, materials or features are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be construed as limitations of the present invention. The above-mentioned embodiments can be changed, modified, replaced and modified within the scope of the present utility model under the principle and purpose.

Claims (9)

1. An extendable HDMI audio-video switching device, characterized in that, comprises a first HDMI input interface, a second HDMI input interface, a network cable input interface, the first HDbaseT video transmitter receiving end, a video switcher, an HDMI output interface, The first HDbaseT video transmitter transmitter, network cable output interface, SPDIF output interface, microcontroller and key module; Wherein, the first HDMI input interface is used to receive a first HDMI signal from an external first video source, and the second HDMI input interface is used to receive a second HDMI signal from an external second video source; the The network cable input interface is used to receive the first HDbaseT signal from the second HDbaseT video transmitter transmitter of the outside, and the first HDbaseT video transmitter receiver is connected to the network cable input interface to convert the first HDbaseT signal is the third HDMI signal; The audio and video input end of the video switcher is connected with the first HDMI input interface, the second HDMI input interface, and the first HDbaseT video transmitter receiving end, for selecting and inputting the first HDMI signal in response to a video switching signal , the second HDMI signal or the third HDMI signal; the video output end of the video switcher is connected to the HDMI output interface and the first HDbaseT video transmitter transmitter for outputting high-definition video signals to the HDMI output interface or The first HDbaseT video transmitter receiving end; the first audio output end of the video switcher is connected to the SPDIF output interface for outputting the first digital audio signal to the SPDIF output interface; The transmitting end of the first HDbaseT video transmitter is connected to the output interface of the network cable, and is used to convert the high-definition video signal into a second HDbaseT signal and output it to the external second HDbaseT video transmitter receiving terminal through the output interface of the network cable ; The button module includes at least one switch button, the first control terminal of the microcontroller is connected to the video switcher, the input terminal of the microcontroller is connected to the button module, and is used to switch the button according to the first control terminal of the switch button. A trigger signal generates the video switching signal. 2. The extendable HDMI audio-video switching device according to claim 1, further comprising an earphone input interface, an analog signal to digital signal unit, an audio switcher, a power amplifier unit and a speaker; The earphone input interface is used to connect an external audio source to receive a first analog audio signal, and the analog signal to digital signal unit is connected to the earphone input interface and is used to convert the first analog audio signal into a second digital audio signal; The input end of the audio switcher is connected to the second audio output end of the analog signal to digital signal unit and the video switcher to receive the second digital audio signal and output the second audio output end of the video switcher The third digital audio signal; the first output end of the audio switcher is connected to the power amplifier unit, and is used to select the second digital audio signal or the third digital audio signal to output to the power amplifier unit in response to the audio switching signal; The power amplifier unit is connected to the speaker, and is used to amplify the second digital audio signal or the third digital audio signal and output it from the speaker; The second control terminal of the microcontroller is connected to the audio switcher, and is used for generating the audio switching signal according to the second trigger signal of the switching button. 3. The extendable HDMI audio-video switching device according to claim 2, further comprising a digital signal to analog signal unit and an earphone output interface, the digital signal to analog signal unit is connected to the audio switcher, It is used for converting the second digital audio signal or the third digital audio signal into a second analog audio signal and outputting it through the earphone output interface. 4. The extendable HDMI audio-video switching device according to claim 2, wherein the power amplifier unit is further connected with a subwoofer driver, and the subwoofer driver is connected with a subwoofer output interface. 5. The extendable HDMI audio-video switching device according to claim 1, characterized in that, the receiving end of the first HDbaseT video transmitter is connected with an infrared receiving head for receiving the remote control instruction of the third video source remote controller A third video source is controlled. 6. The extendable HDMI audio-video switching device according to claim 1, characterized in that, the transmitting end of the first HDbaseT video transmitter is connected with an infrared transmitting head, which is used to transmit remote control instructions and perform external video display equipment control. 7. The extendable HDMI audio-video switching device according to claim 1, wherein the receiving end of the first HDbaseT video transmitter and the receiving end of the second HDbaseT video transmitter adopt the VS100RX receiving chip of Valens Company, the The transmitting end of the first HDbaseT video transmitter and the transmitting end of the second HDbaseT video transmitter adopt the VS100TX transmitting chip of Valens Company. 8. The extendable HDMI audio-video switching device according to claim 1, wherein the SPDIF output interface comprises an optical fiber output interface. 9. The extendable HDMI audio-video switching device according to claim 2, wherein the video switcher adopts an EP9442 chip.