A multi-video transmission device

Abstract

The application provides a multi-video transmission device, which comprises a sending end unit and a receiving end unit; a signal input end of the sending end unit is electrically connected with an external video source device; a signal input end of the receiving end unit is electrically connected with a signal output end of the sending end unit, and a signal output end of the receiving end unit is electrically connected with an external display device; the sending end unit comprises a sending end video processor, a sending end signal encoder and a sending port; the receiving end unit comprises a receiving port, a receiving end signal decoder and a receiving end video processor; the sending end unit and the receiving end unit are connected in communication through a transmission line. The application has reasonable structure design, only needs one transmission line, does not need a high-performance video processor, can realize double-video simultaneous transmission, can significantly reduce the difficulty of integrated installation, reduces the use cost, can facilitate user operation, and improves user office efficiency.

Description

Technical Field

[0001] This invention relates to the field of video transmission technology, and more specifically to a multi-video transmission device. Background Technology

[0002] Video transmission equipment can be simply understood as relay equipment between video source and display device, extending the video transmission distance. It is commonly referred to in the industry as "extender". Its emergence is mainly to solve the limitation that high-definition video cannot be transmitted over long distances. This type of equipment is often used in video surveillance / conference systems / personal offices / large shopping malls and other occasions.

[0003] Currently, most video transmission technologies support single-signal transmission, meaning only one signal can be transmitted at a time. To transmit two video signals simultaneously, there are two main methods:

[0004] One approach is as follows: Figure 2 As shown, a single-channel signal transmission method is used, and the two devices are integrated into the same device (or, two sets of devices are installed directly, the principle is the same).

[0005] Another way is: such as Figure 3 As shown, the two signals are first sent to the video processor-3 together, and the two signals are combined into one by the algorithm. Then, the signal is sent out by the signal encoder. The receiving end processes in the reverse direction, first decoding the signal, then separating the signal, then restoring it, and finally outputting it to the display device.

[0006] The above two methods have the following disadvantages:

[0007] (1) High cost, requiring the integration of two independent designs; complex installation, requiring integrators to lay two cables during installation, which is not friendly to upgrading old equipment (which originally only had one cable), making it difficult and resulting in high overall maintenance costs.

[0008] (2) The software development is difficult and the performance requirements of the video processor-3 are high. It needs to complete the synthesis and compression of two video streams. At the same time, the peripheral costs of the circuit are high (such as the need for external DDR, etc.), resulting in a large device size and high power consumption.

[0009] In view of this, Chinese patent CN202011398922.4 discloses a video transmission method, apparatus, electronic device, and storage medium. The method includes: acquiring a target keyframe from a currently acquired target video; sending the target keyframe to the receiving end through a communication channel established with the receiving end, so that the receiving end returns corresponding preset feedback information upon receiving the target keyframe and displays the target keyframe; and stopping the transmission of the target keyframe upon receiving the preset feedback information. While this patent enables video transmission between the sending and receiving ends, it can only achieve single-type video transmission, and cannot achieve simultaneous transmission of multiple videos, nor can it extend to multi-type signal transmission such as low-speed signal transmission, thus limiting its applicability.

[0010] Chinese patent CN202110609169.7 discloses an ultra-high-definition video transmission method and system. The method includes the steps of dividing an ultra-high-definition video into multiple smaller bandwidth video streams at the transmitting end; transmitting the multiple smaller bandwidth video streams over a long distance via HDMI to the receiving end; and combining the multiple smaller bandwidth video streams into a single ultra-high-definition video stream at the receiving end. The system includes a transmitting end, a receiving end, and multiple network transmission lines. The transmitting end is used to divide a single ultra-high-definition video stream into multiple smaller bandwidth video streams and transmit them over a long distance via multiple network transmission lines to the receiving end, and to encode the multiple smaller bandwidth video streams. The receiving end is used to decode the received multiple smaller bandwidth encoded video streams, merge the decoded multiple smaller bandwidth video streams into a single ultra-high-definition video stream, and transmit it to a display module via HDMI for display. This patent has relatively low video transmission efficiency, requiring the segmentation and synthesis of individual video signals before transmission and display. It cannot transmit multiple video signals simultaneously. When multiple video signals are transmitted, the performance requirements of the video processor are high, which can easily lead to excessive workload on the video processor, resulting in malfunctions or damage, increased maintenance costs, and increased usage costs. At the same time, video transmission is also prone to delays, which will seriously affect the user's office efficiency and user experience.

[0011] Chinese patent CN202210413500.2 discloses a communication testing method for an audio / video transmission system, including: obtaining the audio / video file to be tested from the audio / video transmitter and constructing a communication test link for the audio / video file; separating the file features from the audio / video file to obtain a data-separated file; encoding the file features to obtain encoded features; and fragmenting the data-separated file to obtain multiple sub-data-separated files; transmitting the encoded features and multiple sub-data-separated files to the audio / video receiver according to the communication test link; reassembling the multiple sub-data-separated files based on the encoded features at the audio / video receiver to obtain a reassembled file; and performing data consistency verification on the audio / video file and the reassembled file to obtain the audio / video communication test results for the audio / video transmitter and receiver. While this patent enables video transmission, the transmission method is somewhat cumbersome. Besides requiring a series of operations such as separating, fragmenting, reassembling, and consistency verification of the audio / video file to achieve audio / video communication, the transmission efficiency is low. It cannot achieve efficient simultaneous transmission of multiple video signals, nor can it expand the types of transmitted signals, seriously affecting user work efficiency and user experience.

[0012] In conclusion, it is necessary to further innovate existing technologies. Summary of the Invention

[0013] To address the technical problems existing in the background art mentioned above, this invention proposes a multi-video transmission device with a reasonable structural design. It only requires one transmission line and does not require a high-performance video processor to achieve simultaneous transmission of dual videos. This can significantly reduce the difficulty of integration and installation, reduce the cost of use, facilitate user operation, improve user office efficiency, and is suitable for promotion and application.

[0014] To address the aforementioned technical problems, this invention provides a multi-video transmission device, comprising a transmitting unit and a receiving unit. The signal input terminal of the transmitting unit is electrically connected to an external video source device. The signal input terminal of the receiving unit is electrically connected to the signal output terminal of the transmitting unit, and the signal output terminal of the receiving unit is electrically connected to an external display device. The transmitting unit includes a transmitting video processor, a transmitting signal encoder, and a transmitting port. The receiving unit includes a receiving port, a receiving signal decoder, and a receiving video processor. The signal input terminal of the transmitting video processor is connected to the external video source device, and its signal output terminal is connected to the signal input terminal of the transmitting signal encoder. The signal output terminal of the transmitting signal encoder is connected to the transmitting port and, through the transmitting port, to the receiving port. The signal input terminal of the receiving signal decoder is electrically connected to the receiving port. The signal output terminal of the receiving video processor is electrically connected to an external display device. The transmitting unit and the receiving unit communicate via a single transmission line.

[0015] The transmitting end video processor has at least one pair, and the transmitting end signal encoder includes at least two transmitting end video signal encoders; the signal input terminal of each transmitting end video signal encoder is electrically connected to each corresponding transmitting end video processor, and the signal output terminal of each transmitting end video signal encoder is electrically connected to the transmitting port;

[0016] The receiving end video processor has at least one pair, and the receiving end signal decoder includes at least two receiving end video signal decoders; the signal input terminal of each receiving end video signal decoder is electrically connected to the receiving port, the signal output terminal of each receiving end signal decoder is connected to the signal input terminal of the corresponding receiving end video processor, and the signal output terminal of each receiving end video processor is electrically connected to an external display device.

[0017] Each of the receiving end signal decoders shares one transmitting port, and each of the receiving end video signal decoders shares one receiving port;

[0018] Each of the transmitting video processors receives a corresponding video input signal, decrypts it, converts it into a parallel video signal, and transmits it to the corresponding transmitting video encoder. The transmitting video encoder converts the received parallel video signal into a serial high-speed signal and outputs it to the transmitting port. The transmitting port transmits the serial high-speed signal to the receiving port via a transmission line. The receiving port transmits the received serial high-speed signal to the corresponding receiving video decoder. The receiving video decoder decodes the received serial high-speed signal and outputs a parallel signal to the corresponding receiving video processor. The receiving video processor performs format conversion and content encryption on the received parallel signal before transmitting it to an external display device.

[0019] The multi-video transmission device includes a transmitting end signal encoder that further includes a transmitting end USB signal encoder. The signal input terminal of the transmitting end USB signal encoder is electrically connected to an external transmitting end USB device, and the signal output terminal of the transmitting end USB signal encoder is electrically connected to the transmitting port.

[0020] The multi-video transmission device, wherein: the transmitting end USB signal encoder receives the USB signal transmitted from the USB device, and converts the received USB signal into a serial high-speed signal and outputs it to the transmitting port.

[0021] The multi-video transmission device includes a receiver signal decoder that further includes a receiver USB signal decoder. The signal input terminal of the receiver USB signal decoder is electrically connected to the receiver port, and the signal output terminal of the receiver USB signal decoder is electrically connected to an external receiver USB device.

[0022] The multi-video transmission device, wherein: the receiving end USB signal decoder receives the serial signal transmitted from the receiving port, and decodes the received serial signal to output a USB signal to an external receiving end USB device.

[0023] The multi-video transmission device, wherein: the transmitting port is also connected to a power adapter, and the connected power adapter is synchronously transferred to the receiving port via a twisted pair cable.

[0024] The multi-video transmission device, wherein the sending port and the receiving port are connected by a twisted pair cable.

[0025] The multi-video transmission device includes: a pair of transmitting video processors that respectively receive two video input signals; and a pair of transmitting video signal encoders, wherein the signal input terminals of the pair of transmitting video signal encoders are respectively matched and connected to the signal output terminals of the pair of transmitting video processors.

[0026] The multi-video transmission device, wherein: the receiving end video signal decoder has a pair, and the signal input terminals of the pair of receiving end video signal decoders are electrically connected to the receiving port.

[0027] The multi-video transmission device, wherein: the receiving end video processor is a pair, and the signal input terminals of the pair of receiving end video processors are respectively matched and connected to the signal output terminals of the pair of receiving end video signal decoders.

[0028] By adopting the above technical solution, the present invention has the following beneficial effects:

[0029] This invention presents a multi-video transmission device with a reasonable structural design and convenient implementation. It requires only a single transmission line and no high-performance video processor to achieve simultaneous dual-video transmission. For monitoring / industrial control, this device simplifies integration and installation by requiring only a single cable, reducing costs. For personal use or small-scale meetings, dual-video transmission supports PC screen expansion, allowing for dual-screen display of different content. It also supports USB port extension and expansion, enhancing user convenience and improving work efficiency. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of the multi-video transmission device of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of existing video transmission equipment;

[0033] Figure 3 This is a schematic diagram of the structure of another existing video transmission device. Detailed Implementation

[0034] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also be an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] The present invention will be further explained below with reference to specific embodiments.

[0037] like Figure 1 As shown, the multi-video transmission device provided in this embodiment includes a transmitting unit 1 and a receiving unit 2.

[0038] The transmitting unit 1 includes a transmitting video processor 11, a transmitting signal encoder 12, and a transmitting port 13.

[0039] The transmitting video processor 11 has a pair, with the signal input terminal of each transmitting video processor 11 connected to an external video source device, and the signal output terminal of each transmitting video processor 11 connected to the signal input terminal of the transmitting signal encoder 12. Each transmitting video processor 11 receives a video input signal from the external video source device, performs video decryption and signal format conversion on the received video input signal to form a parallel signal, and transmits it to the corresponding transmitting signal encoder 12.

[0040] The signal output terminal of the transmitter signal encoder 12 is connected to the transmitter port 13 and then to the receiver unit 2 via the transmitter port 13.

[0041] The transmitting end signal encoder 12 includes a transmitting end video signal encoder 121 and a transmitting end USB signal encoder 122. The transmitting end video signal encoder 121 is a pair, with its signal input terminals respectively matched and connected to the signal output terminals of a pair of transmitting end video processors 11. Each transmitting end video signal encoder 121 receives parallel signals transmitted from its corresponding transmitting end video processor 11, converts the received parallel signals into serial high-speed signals, and outputs them to the transmitting port 13. The transmitting end USB signal encoder 122 has its signal input terminal electrically connected to an external transmitting end USB device, and its signal output terminal electrically connected to the transmitting port 13. The transmitting end USB signal encoder 122 receives USB signals transmitted from the external transmitting end USB device and converts the received USB signals into serial high-speed signals, outputting them to the transmitting port 13.

[0042] The transmitting port 13 has one, which receives the serial high-speed signal output by the transmitting end signal encoder 12, and transmits the received serial signal to the receiving end unit 2 through a twisted pair cable.

[0043] The receiver unit 2 includes a receiver port 21, a receiver signal decoder 22, and a receiver video processor 23.

[0044] The receiving port 21 is connected to the transmitting port 13 of the transmitting unit 1 via a twisted pair cable; there is only one receiving port 21, which receives the serial signal transmitted from the transmitting port 13 of the transmitting unit 1.

[0045] The receiver signal decoder 22 includes a receiver video signal decoder 221 and a receiver USB signal decoder 222. The signal output terminal of the receiver signal decoder 22 is connected to the signal input terminal of the receiver video processor 23, which outputs a video signal through its signal output terminal.

[0046] The receiving end video signal decoder 221 has a pair, and the signal input terminal of each receiving end video signal decoder 221 is electrically connected to the receiving port 21. Each receiving end video signal decoder 221 receives the serial signal transmitted from the receiving port 21 and decodes the received serial signal to output a parallel signal.

[0047] The signal input terminal of the receiving USB signal decoder 222 is also electrically connected to the receiving port 21, and the signal output terminal of the receiving USB signal decoder 222 is electrically connected to an external USB device through a USB interface. Specifically, the receiving USB signal decoder 222 receives the serial signal transmitted from the receiving port 21, decodes the received serial signal, and outputs a USB signal to the external receiving USB device.

[0048] The signal output terminal of the receiving video processor 23 is electrically connected to an external display device. The receiving video processor 23 also has a pair, with the signal input terminals of each pair corresponding to the signal output terminals of a pair of receiving video signal decoders 221. Each receiving video processor 23 receives the parallel signal transmitted from the corresponding receiving video signal decoder 221, performs format conversion on the parallel signal, encrypts the content, and outputs it to the external display device.

[0049] Example 1

[0050] In addition to simultaneously transmitting dual video signals, the multi-video transmission device of this invention can also transmit USB signals and power. The transmission processes are as follows:

[0051] (1) Video transmission

[0052] Two input video signals from external video source devices are processed separately. First, the transmitting-end video processor 11 decrypts the video and converts the signal format to form parallel signals, which are then sent to the transmitting-end video signal encoder 121. The transmitting-end video signal encoder 121 converts the received parallel signals into high-speed serial signals and outputs them to the output port 13. The output port 13 transmits the serial signals to the receiving port 21 via a twisted-pair cable. The receiving port 21 then transmits the serial signals to the receiving-end video signal decoder 221. The receiving-end video signal decoder 221 decodes and outputs parallel signals. Finally, the receiving-end video processor 23 performs format conversion and encrypts the content before sending it to the display device. This solution supports simultaneous transmission of two 1080P HDMI signals up to 80 meters, and can be expanded in the future to support VGA / DP / USB-C video signal transmission.

[0053] (2) USB signal transmission

[0054] The transmitting port 13 converts the USB signal into a high-speed serial signal via the transmitting USB signal encoder 122. The receiving port 21 transmits the received serial signal to the receiving USB signal decoder 222. The receiving USB signal decoder 222 reverse-decodes the serial signal to restore the USB signal. This solution supports USB 2.0 and is backward compatible with USB 1.1 devices. The transmitting end has one USB-type B port, which acts as a device to connect to a PC or other host. The receiving end has four USB-type A ports, which act as a host to connect downstream USB devices, such as mice, keyboards, flash drives, hard drives, cameras, and other USB peripherals. This solution supports a USB 2.0 signal transmission extension of 60 meters and a USB 1.1 signal transmission extension of 80 meters.

[0055] (3) Power transmission

[0056] This solution supports POC (Power over cable) power supply, which means that the device can work normally by simply connecting a power adapter to either end, making it easy to integrate and install.

[0057] Example 2

[0058] The transmitting port 13 of the transmitting unit 1 is also connected to a power adapter, and the connected power adapter is synchronously transferred to the receiving port 21 of the receiving unit 2 via a twisted pair cable. The number of transmitting video processors 11 corresponds to the number of external video source devices, that is, each transmitting video processor 11 is connected and communicates with one video source device.

[0059] Example 3

[0060] The number of transmitting video signal encoders 121 corresponds to the number of transmitting video processors 11, meaning each transmitting video signal encoder 121 is connected and communicates with one transmitting video processor 11. The number of receiving video signal decoders 221 corresponds to the number of transmitting video signal encoders 121. The number of receiving video processors 23 corresponds to the number of receiving video signal decoders 221, meaning each receiving video processor 23 is connected and communicates with one receiving video signal decoder 221.

[0061] Example 4

[0062] There are two transmitting video processors 11, and two transmitting video signal encoders 121, each corresponding to one of the two transmitting video processors 11 and connected for communication. There are two receiving video signal decoders 221, and two receiving video processors 23, each corresponding to one of the two receiving video signal decoders 221 and connected for communication.

[0063] This invention makes reasonable and full use of the four pairs of twisted-pair cables to indirectly couple the encoded signal onto the cables. It requires less software development work and less complex hardware design costs. It supports POC power supply and meets users' requirements for dual video transmission.

[0064] This invention can also be extended to transmit low-speed serial port signals and infrared signals (these signals do not occupy the network cable channel; the serial port and infrared signals will be packaged together with the video signal in the encoder for transmission).

[0065] This invention features a reasonable structural design, requiring only one transmission line and no high-performance video processor to achieve simultaneous dual video transmission. It significantly reduces the difficulty of integration and installation, lowers usage costs, facilitates user operation, and improves user office efficiency, making it suitable for promotion and application.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-video transmission device, comprising a transmitting unit and a receiving unit; the signal input terminal of the transmitting unit is electrically connected to an external video source device; the signal input terminal of the receiving unit is electrically connected to the signal output terminal of the transmitting unit, and the signal output terminal of the receiving unit is electrically connected to an external display device; the transmitting unit includes a transmitting video processor, a transmitting signal encoder, and a transmitting port; the receiving unit includes a receiving port, a receiving signal decoder, and a receiving video processor; The signal input terminal of the transmitting end video processor is connected to an external video source device, and the signal output terminal is connected to the signal input terminal of the transmitting end signal encoder; the signal output terminal of the transmitting end signal encoder is connected to the transmitting port and then connected to the receiving port through the transmitting port; the signal input terminal of the receiving end signal decoder is electrically connected to the receiving port; the signal output terminal of the receiving end video processor is electrically connected to an external display device; characterized in that: the transmitting end unit and the receiving end unit are connected and communicate through a transmission line; The transmitting end video processor has at least one pair, and the transmitting end signal encoder includes at least two transmitting end video signal encoders; the signal input terminal of each transmitting end video signal encoder is electrically connected to each corresponding transmitting end video processor, and the signal output terminal of each transmitting end video signal encoder is electrically connected to the transmitting port; The transmitting end signal encoder also includes a transmitting end USB signal encoder; the signal input terminal of the transmitting end USB signal encoder is electrically connected to an external transmitting end USB device, and the signal output terminal of the transmitting end USB signal encoder is electrically connected to the transmitting port; the transmitting end USB signal encoder receives the USB signal transmitted from the USB device and converts the received USB signal into a serial high-speed signal and outputs it to the transmitting port; The receiving end video processor has at least one pair, and the receiving end signal decoder includes at least two receiving end video signal decoders; the signal input terminal of each receiving end video signal decoder is electrically connected to the receiving port, the signal output terminal of each receiving end signal decoder is connected to the signal input terminal of the corresponding receiving end video processor, and the signal output terminal of each receiving end video processor is electrically connected to an external display device. The receiver signal decoder also includes a receiver USB signal decoder; the signal input terminal of the receiver USB signal decoder is electrically connected to the receiver port, and the signal output terminal of the receiver USB signal decoder is electrically connected to an external receiver USB device; the receiver USB signal decoder receives the serial signal transmitted from the receiver port, decodes the received serial signal, and outputs a USB signal to the external receiver USB device. Each of the receiving end signal decoders shares one transmitting port, and each of the receiving end video signal decoders shares one receiving port; Each of the transmitting video processors receives a corresponding video input signal, decrypts it, converts it into a parallel video signal, and transmits it to the corresponding transmitting video encoder. The transmitting video encoder converts the received parallel video signal into a serial high-speed signal and outputs it to the transmitting port. The transmitting port transmits the serial high-speed signal to the receiving port via a transmission line. The receiving port transmits the received serial high-speed signal to the corresponding receiving video decoder. The receiving video decoder decodes the received serial high-speed signal and outputs a parallel signal to the corresponding receiving video processor. The receiving video processor performs format conversion and content encryption on the received parallel signal before transmitting it to an external display device.

2. The multi-video transmission device as described in claim 1, characterized in that: The transmitting port is also connected to a power adapter, and the connected power adapter is synchronously transferred to the receiving port via a twisted pair cable.

3. The multi-video transmission device as described in claim 1, characterized in that: The transmitting port and the receiving port are connected by a twisted pair cable.

4. The multi-video transmission device as described in claim 1, characterized in that: The transmitting end video processor has a pair that respectively receives two video input signals; the transmitting end video signal encoder also has a pair, and the signal input terminals of the pair of transmitting end video signal encoders are respectively matched and connected to the signal output terminals of the pair of transmitting end video processors.

5. The multi-video transmission device as described in claim 1, characterized in that: The receiving end video signal decoder has a pair, and the signal input terminals of the pair of receiving end video signal decoders are electrically connected to the receiving port.

6. The multi-video transmission device as described in claim 5, characterized in that: The receiving end video processor has a pair, and the signal input terminals of the pair of receiving end video processors are respectively matched and connected to the signal output terminals of the pair of receiving end video signal decoders.

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