CN213846895U - HDMI signal adjusting device - Google Patents
HDMI signal adjusting device Download PDFInfo
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- CN213846895U CN213846895U CN202022854409.3U CN202022854409U CN213846895U CN 213846895 U CN213846895 U CN 213846895U CN 202022854409 U CN202022854409 U CN 202022854409U CN 213846895 U CN213846895 U CN 213846895U
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Abstract
The utility model provides a HDMI signal conditioning equipment, include: the power-saving device comprises a first HDMI interface, a second HDMI interface, a microcontroller and a storage unit, wherein the first HDMI interface is connected with an external signal source host, the second HDMI interface is connected with external display equipment, the microcontroller is respectively connected with the first HDMI interface, the second HDMI interface and the storage unit, and the storage unit is a storage device capable of still storing data after power failure. The utility model discloses peg graft between signal source host computer and display device, the accessible once or several times plug operation, match the video resolution who has best display effect under the current transmission environment to can simulate display device and signal source host computer exchange EDID information, normally show with the guarantee video signal on display device.
Description
Technical Field
The utility model belongs to the technical field of audio and video signal transmission technique and specifically relates to a HDMI signal adjusting device.
Background
HDMI (High Definition Multimedia Interface) is a digital video/audio Interface technology conforming to the High Definition time standard, and can be used in set-top boxes, DVD players, personal computers, and televisions. The HDMI interface technology has the characteristics of plug and play, and can also automatically optimize video compatibility between a signal source host and a display device, and these characteristics are realized by bidirectional communication exchange EDID (Extended display identification data) information through the HDMI interface. EDID is composed of a 128-byte data structure and stored in the display device. EDID specifies characteristics of the display device, mainly the preferred resolution and refresh rate of the display device, other resolutions and refresh rates that may be supported, and color characteristics. When the signal source host is connected to the display device, the EDID information is sent to the signal source host, and the signal source host reads the information and generates a video with a correct format by using the information to output the video to the display device. DDC (Display Data Channel) is a standard serial bus protocol based on I2C defined by the EDID interchange protocol standard. The DDC specifies 3 pins on the HDMI connector for signal transmission and data exchange, including SDA (serial data line) and SCL (serial clock line) for I2C, and +5V power from the signal source. The signals transmitted in the DDC line are independent of audio-video signals transmitted in a TMDS (Transition Minimized Differential Signaling) line.
When the transmission distance between the signal source host and the display device is long, transmission signal attenuation is caused by long-distance cable transmission, poor connection, cable extension by using a through connector, multiple devices connected in series in a signal path and other factors, especially EDID exchange protocol data transmitted through DDC is affected, and then video display is affected, which is represented by no image display on a screen or the fact that an image exists but the image is distorted, blurred or cannot fill the screen.
Accordingly, it is desirable to provide an apparatus to solve the technical problem of affecting the normal display of video due to signal attenuation when the HDMI interface is used for long-distance transmission.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a HDMI signal conditioning equipment pegs graft between signal source host computer and display device, and the accessible once or several times plug operation matches the video resolution who has best display effect under the current transmission environment to can simulate display device and signal source host computer and exchange EDID information, normally show with the guarantee video signal on display device.
The utility model discloses a following technical scheme realizes:
the utility model provides a HDMI signal conditioning equipment, include: the power-saving device comprises a first HDMI interface, a second HDMI interface, a microcontroller and a storage unit, wherein the first HDMI interface is connected with an external signal source host, the second HDMI interface is connected with external display equipment, the microcontroller is respectively connected with the first HDMI interface, the second HDMI interface and the storage unit, and the storage unit is a storage device capable of still storing data after power failure.
As an improvement, the HDMI signal conditioning apparatus further comprises: the power supply interface is connected with an external direct-current power supply, and the voltage stabilizing circuit is respectively connected with the power supply interface, the microcontroller and the storage unit.
As a refinement, the memory unit is disposed inside the microcontroller.
As an improvement, the 15 pin, the 16 pin, the 18 pin and the 19 pin of the first HDMI (101) are respectively connected with the first I/O interface, the second I/O interface, the third I/O interface and the fourth I/O interface of the microcontroller (103), and the 15 pin, the 16 pin, the 18 pin and the 19 pin of the second HDMI (102) are respectively connected with the fifth I/O interface, the sixth I/O interface, the seventh I/O interface and the eighth I/O interface of the microcontroller (103).
The utility model has the advantages that:
the utility model discloses in the use, through once or several times plug operation, HDMI signal adjusting device can match the video resolution who has the best display effect under the current transmission environment to can analog display equipment and signal source host computer exchange EDID information, thereby when having solved and having adopted the HDMI interface to carry out longer distance transmission, influence the problem that the video normally shows because DDC line signal attenuates.
Drawings
Fig. 1 is a schematic structural diagram of an HDMI signal conditioning device provided by the present invention.
Detailed Description
For a more clear and complete description of the technical solution of the present invention, the following description is made with reference to the accompanying drawings.
Referring to fig. 1, the present invention provides an HDMI signal conditioning device, including: the device comprises a first HDMI 101, a second HDMI 102, a microcontroller 103 and a storage unit 104, wherein the first HDMI 101 is connected with an external signal source host, the second HDMI 102 is connected with an external display device, the microcontroller 103 is respectively connected with the first HDMI 101, the second HDMI 102 and the storage unit 104, and the storage unit 104 is a storage device capable of storing data after power failure.
The utility model discloses a theory of operation does:
the video resolution data is stored in the storage unit 104. When the HDMI interface of signal source host computer and display device's HDMI interface lug connection can not normally show, will the utility model provides a HDMI signal adjusting device connects between signal source host computer and display device, and microcontroller 103 will read video resolution data from memory cell 104 after detecting second HDMI interface 102 electricity to analog display device exchanges EDID information with the signal source host computer, and write in the video resolution data that read in the EDID information that exchanges.
The video resolution data are stored in the storage unit 104 sequentially from high resolution to low resolution in an initial state, so as to form a video resolution data queue. For example, the data in the video resolution data queue is 4K60FPS, 4K30FPS, 1080P, 720P, 576P, 480P in this order. After the second HDMI interface 102 is powered on each time, the microcontroller 103 reads the resolution data arranged at the head of the video resolution data queue, then modifies the data arrangement order in the video resolution data queue, arranges the read resolution data at the tail of the video resolution data queue, sequentially moves forward the other unread resolution data, and finally, the microcontroller 103 writes the read resolution data into the EDID to exchange data with the signal source host. Since the data arrangement order in the video resolution data queue in the storage unit 104 is changed after the second HDMI interface 102 is powered on each time, if the video resolution read by the microcontroller 103 does not cause normal display after the second HDMI interface 102 is powered on, the video resolution can be reduced by plugging the HDMI connection line at the second HDMI interface 102 again, so that the video resolution which can be normally displayed and has the best display effect can be matched.
Therefore, the utility model discloses in the use, through once or several times plug operation, HDMI signal conditioning device can match the video resolution who has best display effect under the current transmission environment to can analog display equipment and signal source host computer exchange EDID information, thereby when having solved and having adopted the HDMI interface to carry out longer distance transmission, influence the problem that the video normally shows because DDC line signal attenuates.
As a modified embodiment, referring to fig. 1, the HDMI signal conditioning apparatus further includes a power interface 105 and a voltage regulator 106, the power interface 105 is connected to an external dc power supply, and the voltage regulator 106 is respectively connected to the power interface 105, the microcontroller 103 and the storage unit 104. The microcontroller 103 and the memory unit 104 are supplied with power from an external dc power supply.
As a modified embodiment, the memory unit 104 is disposed inside the microcontroller 103. The memory unit 104 may be a non-volatile memory unit internal to the microcontroller 104.
As a modified embodiment, the 15 pins, the 16 pins, the 18 pins and the 19 pins of the first HDMI interface 101 are respectively connected to the first I/O interface, the second I/O interface, the third I/O interface and the fourth I/O interface of the microcontroller 103, and the 15 pins, the 16 pins, the 18 pins and the 19 pins of the second HDMI interface 102 are respectively connected to the fifth I/O interface, the sixth I/O interface, the seventh I/O interface and the eighth I/O interface of the microcontroller 103. Connected in this manner, the microcontroller 103 may exchange EDID information between the analog display device and the signal source host.
Of course, the present invention can also have other various embodiments, and based on the embodiments, those skilled in the art can obtain other embodiments without any creative work, and all of them belong to the protection scope of the present invention.
Claims (4)
1. An HDMI signal conditioning apparatus, comprising: the power-saving device comprises a first HDMI (high-definition multimedia interface) 101, a second HDMI (high-definition multimedia interface) 102, a microcontroller (103) and a storage unit (104), wherein the first HDMI 101 is connected with an external signal source host, the second HDMI 102 is connected with an external display device, the microcontroller 103 is respectively connected with the first HDMI 101, the second HDMI 102 and the storage unit (104), and the storage unit (104) is a storage device capable of still storing data after power failure.
2. The HDMI signal conditioning apparatus of claim 1, further comprising: the power supply comprises a power supply interface (105) and a voltage stabilizing circuit (106), wherein the power supply interface (105) is connected with an external direct-current power supply, and the voltage stabilizing circuit (106) is respectively connected with the power supply interface (105), the microcontroller (103) and the storage unit (104).
3. HDMI signal conditioning arrangement according to claim 1, characterized in that said memory unit (104) is placed inside said microcontroller (103).
4. The HDMI signal conditioning device according to claim 1, wherein the first HDMI interface (101) has pins 15, 16, 18 and 19 connected to the first I/O interface, the second I/O interface, the third I/O interface and the fourth I/O interface of the microcontroller (103), respectively, and the second HDMI interface (102) has pins 15, 16, 18 and 19 connected to the fifth I/O interface, the sixth I/O interface, the seventh I/O interface and the eighth I/O interface of the microcontroller (103), respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022854409.3U CN213846895U (en) | 2020-12-01 | 2020-12-01 | HDMI signal adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022854409.3U CN213846895U (en) | 2020-12-01 | 2020-12-01 | HDMI signal adjusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213846895U true CN213846895U (en) | 2021-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022854409.3U Active CN213846895U (en) | 2020-12-01 | 2020-12-01 | HDMI signal adjusting device |
Country Status (1)
| Country | Link |
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| CN (1) | CN213846895U (en) |
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2020
- 2020-12-01 CN CN202022854409.3U patent/CN213846895U/en active Active
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