HDMI signal long-distance transmission control circuit

Abstract

The utility model provides a kind of HDMI signal long-distance transmission control circuit, including HDMI signal transmitting circuit inside being equipped with signal transmitting RJ45 network interface, HDMI signal receiving circuit inside being equipped with signal receiving RJ45 network interface, power supply is connected with the power supply of HDMI signal transmitting circuit, the input end of HDMI signal transmitting circuit is connected with HDMI signal source main device, the output end of HDMI signal transmitting circuit is connected with the input end of HDMI signal receiving circuit, the output end of HDMI signal transmitting circuit is also connected with HDMI signal display device, the output end of HDMI signal receiving circuit is connected with HDMI signal display device, the output end of control signal feedback circuit is feedback connection with HDMI signal source main device through HDMI signal receiving circuit, HDMI signal transmitting circuit, the beneficial effect of the utility model is: can realize the farthest 70 meters high quality transmission of HDMI signal.

Description

Technical Field

[0001] This utility model relates to the field of signal transmission circuit technology, specifically to an HDMI signal long-distance transmission control circuit. Background Technology

[0002] HDMI stands for High Definition Multimedia Interface, a digital video / audio interface technology. It is a dedicated digital interface suitable for image transmission, capable of simultaneously transmitting audio and video signals. Its maximum data transfer rate is 2.25 GB / s, and it eliminates the need for digital-to-analog or analog-to-digital conversion before signal transmission. HDMI can be paired with Wideband Digital Content Protection (HDCP) to prevent unauthorized copying of copyrighted audio-visual content. The extra bandwidth available in HDMI can be used for future upgrades to audio and video formats. Since a 1080p video and an 8-channel audio signal require less than 0.5 GB / s, HDMI has significant bandwidth, allowing it to connect a DVD player, receiver, and PRR with a single cable.

[0003] Currently, HDMI signals are widely used in daily life. Sometimes, it's necessary to transmit HDMI signals over long distances, such as connecting a laptop or desktop computer to a monitor that supports HDMI input for multi-screen display; connecting a laptop or other device to a projector in a classroom for multimedia teaching; connecting a computer or tablet to a large-screen display for product demonstrations or conference presentations; or connecting game consoles, Blu-ray players, and other devices to a TV or projector. Traditionally, this is done using an in-wall HDMI single-cable extender. However, this method is generally only suitable for short-distance transmission. Over longer distances, the HDMI signal will attenuate and distort, making it difficult to guarantee high-quality audio and video transmission. This can lead to significant audio signal distortion. Furthermore, this method has limited control options, a narrow application range, and low resolution, resulting in a poor user experience. Utility Model Content

[0004] To address the problems in existing technologies, this utility model provides a long-distance HDMI signal transmission control circuit. By setting up a power supply, an HDMI signal transmitting circuit, an HDMI signal receiving circuit, and a control signal feedback circuit that work together in the long-distance HDMI signal transmission control circuit, high-quality long-distance transmission of HDMI signals can be achieved. Using a single RJ45 network cable to connect the HDMI signal transmitting circuit and the HDMI signal receiving circuit can support high-quality transmission of HDMI signals up to 70 meters away. This solves the problems of short transmission distance and easy distortion over long distances in existing wall-mounted HDMI single network cable extenders.

[0005] This utility model provides a long-distance HDMI signal transmission control circuit, including a power supply, an HDMI signal transmitting circuit, an HDMI signal receiving circuit, and a control signal feedback circuit. The HDMI signal transmitting circuit has a signal transmitting RJ45 network interface, and the HDMI signal receiving circuit has a signal receiving RJ45 network interface. The output of the power supply is connected to the HDMI signal transmitting circuit. The input of the HDMI signal transmitting circuit is connected to an HDMI signal source device. The output of the HDMI signal transmitting circuit is connected to the input of the HDMI signal receiving circuit. The output of the HDMI signal transmitting circuit is also connected to an HDMI signal display device. The output terminal is connected to an HDMI signal display device. The output terminal of the HDMI signal receiving circuit can also be cascaded with multiple other HDMI signal receiving circuits. Each other HDMI signal receiving circuit can be connected to an HDMI signal display device. The output terminal of the control signal feedback circuit is fed back to the HDMI signal source host device through the HDMI signal receiving circuit and the HDMI signal transmitting circuit. The HDMI signal transmitting circuit can receive the HDMI signal output by the HDMI signal source host device and transmit it over long distances through the signal transmitting RJ45 network interface and Cat5e / Category 6 network cable to the signal receiving RJ45 network interface of the HDMI signal receiving circuit, achieving no attenuation of HDMI signal within a maximum distance of 70 meters.

[0006] This utility model is further improved by including an HDMI signal transmitting chip U1 in the HDMI signal transmitting circuit. The HDMI signal transmitting chip U1 has 96 pins. Pins 10, 32, 52, 65, 71, and 85 of the HDMI signal transmitting chip U1 are connected to the output terminal of the power supply. Pins 53 and 54 of the HDMI signal transmitting chip U1 are connected to the output terminal of the HDMI signal source main device. Pins 11, 12, 14, 15, 17, 18, 19, and 20 of the HDMI signal transmitting chip U1 are connected to an HDMI signal display device.

[0007] This utility model is further improved by including a network transformer chip UE1 and a network transformer chip UE2 within the HDMI signal transmitting circuit. Both network transformer chips UE1 and UE2 have 8 pins. Pins 5, 6, 7, and 8 of network transformer chip UE1 are connected to pins 81, 80, 79, and 78 of the HDMI signal transmitting chip U1, respectively. Pins 1, 2, 3, and 4 of network transformer chip UE1 are connected to the input terminal of the HDMI signal receiving circuit through the signal transmitting RJ45 network interface and the signal receiving RJ45 network interface. Pins 5, 6, 7, and 8 of network transformer chip UE2 are connected to pins 76, 75, 74, and 73 of the HDMI signal transmitting chip U1, respectively. Pins 1, 2, 3, and 4 of network transformer chip UE2 are connected to the input terminal of the HDMI signal receiving circuit through the signal transmitting RJ45 network interface and the signal receiving RJ45 network interface.

[0008] This utility model is further improved by including an HDMI signal receiving chip U2 within the HDMI signal receiving circuit. The HDMI signal receiving chip U2 has 96 pins. Pins 11, 12, 14, 15, 17, 18, 19, and 20 of the HDMI signal receiving chip U2 are connected to an HDMI signal display device. Pins 1, 2, 3, and 4 of the network transformer chip UE1 are connected to pins 94, 95, and 20 of the HDMI signal receiving chip U2 via the signal transmitting RJ45 network interface and the signal receiving RJ45 network interface, respectively. Pins 3, 92, and 91 are connected. Pins 1, 2, 3, and 4 of the network transformer chip UE2 are connected to pins 89, 88, 87, and 86 of the HDMI signal receiving chip U2 through the signal transmitting RJ45 network interface and the signal receiving RJ45 network interface, respectively. Pins 53 and 54 of the HDMI signal receiving chip U2 are connected to the output of the control signal feedback circuit. Pins 23 and 24 of the HDMI signal receiving chip U2 are connected to pins 23 and 24 of the HDMI signal receiving chip U1 for feedback.

[0009] This utility model is further improved by including a control signal feedback chip UU1 in the control signal feedback circuit. The control signal feedback chip UU1 has 48 pins. Pins 15 and 16 of the control signal feedback chip UU1 can be connected to a first USB interface peripheral. Pins 13 and 14 of the control signal feedback chip UU1 can be connected to a second USB interface peripheral. Pins 11 and 12 of the control signal feedback chip UU1 are respectively connected to pins 53 and 54 of the HDMI signal receiving chip U2. The first USB interface peripheral and the second USB interface peripheral can feed back control signals to the HDMI signal source host device through the HDMI signal receiving chip U2 and the HDMI signal transmitting chip U1.

[0010] In a further improvement to this utility model, the HDMI signal receiving chip U2 and the HDMI signal transmitting chip U1 are both GSV5100 / 5010.

[0011] This utility model is further improved, and the control signal feedback chip UU1 is model OWK58-D.

[0012] In a further improvement of this invention, the signal transmitting RJ45 network interface and the signal receiving RJ45 network interface are connected via an RJ45 network cable.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: It provides a long-distance HDMI signal transmission control circuit. By setting up a power supply, an HDMI signal transmitting circuit, an HDMI signal receiving circuit, and a control signal feedback circuit that cooperate with each other in the HDMI signal long-distance transmission control circuit, the HDMI signal transmitting circuit can receive the HDMI signal output by the HDMI signal source main device and transmit it to the HDMI signal receiving circuit over a long distance through the signal transmitting RJ45 network interface and the signal receiving RJ45 network interface. It can realize high-quality long-distance transmission of HDMI signals. Using a single RJ45 network cable to connect the HDMI signal transmitting circuit and the HDMI signal receiving circuit can support high-quality transmission of HDMI signals up to 70 meters away. When using HDMI cascading, at least 7 levels can be cascaded. When using Cat5e / Category 6 network cables, 12 levels can be cascaded. Using CAT6 network cables, 4K resolution 30fps video signal transmission can be performed. It supports HDCP, remote KVM and RS232 serial port control, and solves the problems of short transmission distance and easy distortion over long distances in the transmission of HDMI signals by in-wall HDMI single network cable extenders in the prior art. Attached Figure Description

[0014] To more clearly illustrate the solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of a long-distance HDMI signal transmission control circuit according to the present invention.

[0016] Figure 2 This is a circuit diagram of the HDMI signal transmitting circuit of this utility model;

[0017] Figure 3 This is a circuit diagram of the HDMI signal transmitting circuit of this utility model;

[0018] Figure 4 This is a circuit diagram of the HDMI signal receiving circuit of this utility model;

[0019] Figure 5 This is a circuit diagram of the control signal feedback circuit of this utility model. Detailed Implementation

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a particular order.

[0021] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0023] like Figures 1-5As shown, this utility model provides a long-distance HDMI signal transmission control circuit, including a power supply, an HDMI signal transmitting circuit, an HDMI signal receiving circuit, and a control signal feedback circuit. The HDMI signal transmitting circuit has a signal transmitting RJ45 network interface, and the HDMI signal receiving circuit has a signal receiving RJ45 network interface. The output of the power supply is connected to the HDMI signal transmitting circuit. The input of the HDMI signal transmitting circuit is connected to the HDMI signal source host device. The output of the HDMI signal transmitting circuit is connected to the input of the HDMI signal receiving circuit. The output of the HDMI signal transmitting circuit is also connected to an HDMI signal display device. The output of the HDMI signal receiving circuit can also be cascaded with multiple other HDMI signal receiving circuits, each of which can be connected to an HDMI signal display device. The output of the control signal feedback circuit is connected to the HDMI signal source host device through the HDMI signal receiving circuit and the HDMI signal transmitting circuit. The HDMI signal transmitting circuit can receive the HDMI signal output from the HDMI signal source device and transmit it over long distances via the signal transmitting RJ45 network interface and Cat5e / Category 6 network cable to the signal receiving RJ45 network interface of the HDMI signal receiving circuit, achieving no attenuation of the HDMI signal within a maximum distance of 70 meters. In HDMI working mode, it is compatible with the HDMI 1.4 / 2.0 standard and supports the HDCP 1.4 / 2.2 protocol. With its powerful HDMI receiver (Rx) equalizer and transmitter (Tx) pre-emphasis function, it supports all HDMI signals. With timings 1.3 / 1.4 / 2.0, this product can be cascaded at least 7 levels when using HDMI cascading, and up to 12 levels when using Cat5e / Cat6 network cables. It can achieve high-quality long-distance transmission of HDMI signals. Using a single RJ45 network cable to connect the HDMI signal transmitting circuit and the HDMI signal receiving circuit can support high-quality transmission of HDMI signals up to 70 meters away. Using a CAT6 network cable, it can transmit 4K resolution 30fps video signals. It supports HDCP and remote KVM and RS232 serial port control.

[0024] like Figures 2-3As shown, the HDMI signal transmitting circuit includes an HDMI signal transmitting chip U1, model GSV5100 / 5010, with 96 pins. Pins 10, 32, 52, 65, 71, and 85 are connected to the power supply output; pins 53 and 54 are connected to the output of the HDMI signal source device; and pins 11, 12, 14, 15, 17, 18, 19, and 20 are connected to the HDMI signal display device. The HDMI signal transmitting circuit also includes network transformer chips UE1 and UE2. Both E1 and network transformer chip UE2 have 8 pins. Pins 5, 6, 7, and 8 of network transformer chip UE1 are connected to pins 81, 80, 79, and 78 of HDMI signal transmitting chip U1, respectively. Pins 1, 2, 3, and 4 of network transformer chip UE1 are connected to the input of the HDMI signal receiving circuit through the signal transmitting RJ45 network interface and the signal receiving RJ45 network interface. Pins 5, 6, 7, and 8 of network transformer chip UE2 are connected to pins 76, 75, 74, and 73 of HDMI signal transmitting chip U1, respectively. Pins 1, 2, 3, and 4 of network transformer chip UE2 are connected to the input of the HDMI signal receiving circuit through the signal transmitting RJ45 network interface and the signal receiving RJ45 network interface. In this embodiment, after receiving the HDMI signal, the HDMI signal transmitting circuit can simultaneously output one HDMI signal to the HDMI signal display device. After processing, it outputs another set of HDMI signals, which are then connected to network transformer chips UE1 and UE2, and finally output to the signal transmitting RJ45 network interface and the signal receiving RJ45 network interface of the HDMI signal receiving circuit.

[0025] like Figure 4As shown, the HDMI signal receiving circuit includes an HDMI signal receiving chip U2, model GSV5100 / 5010. The HDMI signal receiving chip U2 has 96 pins. Pins 11, 12, 14, 15, 17, 18, 19, and 20 of the HDMI signal receiving chip U2 are connected to the HDMI signal display device. Pins 1, 2, 3, and 4 of the network transformer chip UE1 are connected to the HDMI signal via the signal transmitting RJ45 network interface and the signal receiving RJ45 network interface, respectively. Pins 94, 93, 92, and 91 of receiver chip U2 are connected. Pins 1, 2, 3, and 4 of network transformer chip UE2 are connected to pins 89, 88, 87, and 86 of HDMI signal receiver chip U2 via signal transmitting RJ45 network interface and signal receiving RJ45 network interface, respectively. Pins 53 and 54 of HDMI signal receiver chip U2 are connected to the output of control signal feedback circuit. Pins 23 and 24 of HDMI signal receiver chip U2 are connected to pins 23 and 24 of HDMI signal receiver chip U1 for feedback. In this embodiment, the signal receiving RJ45 network interface of the HDMI signal receiving circuit is used to receive the HDMI signal transmitted from the signal transmitting RJ45 network interface. The HDMI signal is input to the HDMI signal receiving chip U2. After the HDMI signal receiving chip U2 detects the inserted display through HPD, it identifies and reads the EDID through DDC_SDA and DDC_SCL, and finally sends out the video signal with the best resolution supported by the display (supporting up to the HDMI 2.0 standard and backward compatible). At the same time, it can also receive the USB control signal fed back by the control signal feedback circuit and transmit it to the HDMI signal transmitting circuit.

[0026] like Figure 5 As shown, the control signal feedback circuit includes a control signal feedback chip UU1, model OWK58-D, with 48 pins. Pins 15 and 16 of the control signal feedback chip UU1 can be connected to a first USB interface peripheral, pins 13 and 14 can be connected to a second USB interface peripheral, and pins 11 and 12 are connected to pins 53 and 54 of the HDMI signal receiving chip U2, respectively. The first and second USB interface peripherals can feed back control signals to the HDMI signal source host device through the HDMI signal receiving chip U2 and the HDMI signal transmitting chip U1. In this embodiment, the control signal feedback circuit is used to connect USB peripherals, such as a mouse or keyboard, to remotely operate the HDMI signal source host device.

[0027] As can be seen from the above, this utility model provides a long-distance HDMI signal transmission control circuit. By setting up a power supply, an HDMI signal transmitting circuit, an HDMI signal receiving circuit, and a control signal feedback circuit that cooperate with each other in the HDMI signal long-distance transmission control circuit, the HDMI signal transmitting circuit can receive the HDMI signal output by the HDMI signal source main device and transmit it to the HDMI signal receiving circuit over a long distance through the signal transmitting RJ45 network interface and the signal receiving RJ45 network interface. This enables high-quality long-distance transmission of HDMI signals. Using a single RJ45 network cable to connect the HDMI signal transmitting circuit and the HDMI signal receiving circuit can support high-quality transmission of HDMI signals up to 70 meters away. When using HDMI cascading, at least 7 levels can be cascaded, and 12 levels can be cascaded when using Cat5e / Category 6 network cables (CAT5e / 6). Using a CAT6 network cable, 4K resolution 30fps video signal transmission can be performed. It supports HDCP, remote KVM and RS232 serial port control, and solves the problems of short transmission distance and easy distortion over long distances in the transmission of HDMI signals by in-wall HDMI single network cable extenders in the prior art.

[0028] The specific embodiments described above are preferred embodiments of this utility model, and are not intended to limit the specific scope of this utility model. The scope of this utility model includes but is not limited to the specific embodiments described above. All equivalent changes made in accordance with this utility model are within the protection scope of this utility model.

Claims

1. A long-distance HDMI signal transmission control circuit, characterized in that: The system includes a power supply, an HDMI signal transmitting circuit, an HDMI signal receiving circuit, and a control signal feedback circuit. The HDMI signal transmitting circuit has a built-in RJ45 network interface for transmitting signals, and the HDMI signal receiving circuit has a built-in RJ45 network interface for receiving signals. The output of the power supply is connected to the HDMI signal transmitting circuit. The input of the HDMI signal transmitting circuit is connected to an HDMI signal source device. The output of the HDMI signal transmitting circuit is connected to the input of the HDMI signal receiving circuit. The output of the HDMI signal transmitting circuit is also connected to an HDMI signal display device, and the output of the HDMI signal receiving circuit is connected to an HDMI signal display device. The output of the HDMI signal receiving circuit can be cascaded with multiple other HDMI signal receiving circuits, each of which can be connected to an HDMI signal display device. The output of the control signal feedback circuit is connected to the HDMI signal source main device via the HDMI signal receiving circuit and the HDMI signal transmitting circuit. The HDMI signal transmitting circuit can receive the HDMI signal output by the HDMI signal source main device and transmit it over long distances via the signal transmitting RJ45 network interface and Cat5e / Category 6 network cable to the signal receiving RJ45 network interface of the HDMI signal receiving circuit, achieving no attenuation of the HDMI signal within a maximum distance of 70 meters.

2. The HDMI signal long-distance transmission control circuit according to claim 1, characterized in that: The HDMI signal transmitting circuit includes an HDMI signal transmitting chip U1 with 96 pins. Pins 10, 32, 52, 65, 71, and 85 of the HDMI signal transmitting chip U1 are connected to the output of the power supply. Pins 53 and 54 of the HDMI signal transmitting chip U1 are connected to the output of the HDMI signal source device. Pins 11, 12, 14, 15, 17, 18, 19, and 20 of the HDMI signal transmitting chip U1 are connected to an HDMI signal display device.

3. The HDMI signal long-distance transmission control circuit according to claim 2, characterized in that: The HDMI signal transmitting circuit also includes network transformer chips UE1 and UE2. Both network transformer chips UE1 and UE2 have 8 pins. Pins 5, 6, 7, and 8 of network transformer chip UE1 are connected to pins 81, 80, 79, and 78 of the HDMI signal transmitting chip U1, respectively. Pins 1, 2, 3, and 4 of network transformer chip UE1 are connected to the input terminal of the HDMI signal receiving circuit through the signal transmitting RJ45 network interface and the signal receiving RJ45 network interface. Pins 5, 6, 7, and 8 of network transformer chip UE2 are connected to pins 76, 75, 74, and 73 of the HDMI signal transmitting chip U1, respectively. Pins 1, 2, 3, and 4 of network transformer chip UE2 are connected to the input terminal of the HDMI signal receiving circuit through the signal transmitting RJ45 network interface and the signal receiving RJ45 network interface.

4. The HDMI signal long-distance transmission control circuit according to claim 3, characterized in that: The HDMI signal receiving circuit includes an HDMI signal receiving chip U2 with 96 pins. Pins 11, 12, 14, 15, 17, 18, 19, and 20 of the HDMI signal receiving chip U2 are connected to an HDMI signal display device. Pins 1, 2, 3, and 4 of the network transformer chip UE1 are connected to pins 94, 93, 92, and 91 of the HDMI signal receiving chip U2 via the signal transmitting RJ45 network interface and the signal receiving RJ45 network interface, respectively. Pins 1, 2, 3, and 4 of the network transformer chip UE2 are connected to pins 89, 88, 87, and 86 of the HDMI signal receiving chip U2 via the signal transmitting RJ45 network interface and the signal receiving RJ45 network interface, respectively. Pins 53 and 54 of the HDMI signal receiving chip U2 are connected to the output of the control signal feedback circuit. Pins 23 and 24 of the HDMI signal receiving chip U2 are connected to pins 23 and 24 of the HDMI signal receiving chip U1 via feedback connection.

5. The HDMI signal long-distance transmission control circuit according to claim 4, characterized in that: The control signal feedback circuit includes a control signal feedback chip UU1 with 48 pins. Pins 15 and 16 of the control signal feedback chip UU1 can be connected to a first USB interface peripheral, and pins 13 and 14 of the control signal feedback chip UU1 can be connected to a second USB interface peripheral. Pins 11 and 12 of the control signal feedback chip UU1 are connected to pins 53 and 54 of the HDMI signal receiving chip U2, respectively. The first USB interface peripheral and the second USB interface peripheral can feed back control signals to the HDMI signal source host device through the HDMI signal receiving chip U2 and the HDMI signal transmitting chip U1.

6. The HDMI signal long-distance transmission control circuit according to claim 5, characterized in that: The HDMI signal receiving chip U2 and the HDMI signal transmitting chip U1 are both GSV5100 / 5010.

7. The HDMI signal long-distance transmission control circuit according to claim 6, characterized in that: The control signal feedback chip UU1 is model OWK58-D.

8. The HDMI signal long-distance transmission control circuit according to claim 7, characterized in that: The signal transmitting RJ45 network interface and the signal receiving RJ45 network interface can also be connected via an RJ45 network cable.

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