EFP ultra-high-definition long-distance transmission system

Abstract

The utility model discloses an EFP ultra-high-definition long-distance transmission system which comprises a transmitter, a receiver and a transmission cable connecting the transmitter and the receiver. The transmitter comprises a plurality of HDMI signal input interfaces, a first coding module, an electro-optical conversion module and a wavelength division multiplexing module, and the receiver comprises a wavelength division demultiplexing module, a photoelectric conversion module, a second coding module and a plurality of HDMI output interfaces. According to the utility model, the multi-path HDMI signals are converted into one path of optical signals, the optical signals are transmitted through the optical fiber, and the optical signals are converted into the multi-path HDMI signals and the 12G SDI signals after being transmitted to the receiving end, so that the long-distance anti-interference transmission of the HDMI and 12G SDI ultra-high-definition signals can be realized; the 220V alternating current can be transmitted by the 0.75 square meter cable in the photoelectric composite cable, the receiver can provide the 220V alternating current for the transmitter, and the transmitter can supply power to nearby external equipment, so that the problem of power supply of the field EFP flight box is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of media production, in particular to an EFP ultra-high-definition long-distance transmission system. Background Technique

[0002] EFP (Electronic Field Production) is a program production method with integrated equipment, which can integrate a complete set of hardware equipment in an earthquake-resistant flight case convenient for transportation for on-site shooting and editing.

[0003] When shooting signals of existing radio and television and network audio-visual programs, most camera devices adopt 12G SDI / HDMI video output ports. When using 12G SDI signals to transmit ultra-high-definition signals, due to the physical characteristics of 12G SDI transmission cables, the longer the cable, the greater the loss. For example, when using an ultra-high-definition UHD coaxial cable to transmit signals, only a length within 10 - 20 meters can achieve 4K resolution. In general on-site shooting venues, the distance between camera and video recording equipment and the program production live recording venue is relatively far. Therefore, traditional signal transmission schemes are difficult to meet the requirements of long-distance transmission and high signal resolution. In addition, when using traditional HDMI cable transmission signal interfaces, it is easy to fall off and cause signal interruption, making it difficult to ensure the safe transmission of signals. In addition, currently, power supply for EFP flight case equipment at event sites usually requires independent on-site power supply laying, and often the event site does not meet the requirements, and power supply needs to be laid from a far-away power distribution room, resulting in inconvenience in use.

[0004] In view of the above considerations, it is necessary to propose an ultra-high-definition long-distance transmission system suitable for EFP applications to solve the above problems. Content of the Utility Model

[0005] In order to solve the problems of short transmission distance and weak anti-interference ability of ultra-high-definition signals in on-site program shooting, the utility model proposes an EFP ultra-high-definition long-distance transmission system. By converting multiple HDMI signals into one optical signal and using optical fibers for transmission, and then converting them into multiple HDMI signals and 12G SDI signals at the receiving end, long-distance anti-interference transmission of HDMI and 12G SDI ultra-high-definition signals can be achieved.

[0006] The technical solution adopted by the utility model is as follows:

[0007] The utility model proposes an EFP ultra-high-definition long-distance transmission system, including a transmitter, a receiver, and a transmission cable connecting the two;

[0008] The transmitter includes:

[0009] Multiple HDMI signal input interfaces for receiving HDMI signals from cameras;

[0010] The first encoding module, connected to multiple HDMI signal input ends, is used to convert multiple HDMI signals into multiple 12G SDI signals respectively;

[0011] The electro-optical conversion module, connected to the first encoding module, is used to convert multiple 12G SDI signals into multiple optical signals respectively;

[0012] The wavelength division multiplexing module, connected to the electro-optical conversion module and the transmission cable, is used to convert multiple optical signals into one multiplexed optical signal and transmit it to the receiver through the optical fiber in the transmission cable;

[0013] The receiver includes:

[0014] The wavelength division demultiplexing module, connected to the transmission cable, is used to convert one multiplexed optical signal transmitted through the optical fiber in the transmission cable into multiple optical signals;

[0015] The opto-electric conversion module, connected to the wavelength division demultiplexing module, is used to convert multiple optical signals into multiple 12G SDI signals respectively;

[0016] The second encoding module, connected to the opto-electric conversion module, is used to convert multiple 12G SDI signals into multiple HDMI signals respectively;

[0017] Multiple HDMI output interfaces, connected to the second encoding module, are used to output HDMI signals.

[0018] Further, the transmission cable is an optical and electrical composite cable. The receiver further includes a first power input interface and a first power module. The transmitter further includes a power output interface and a second power module. The power output interface is connected to the first power input interface through the cable in the optical and electrical composite cable; the first power input interface is used to access an external 220V AC power supply; the first power module is connected to the first power input interface and is used to convert the 220V AC power supply into a DC power supply suitable for each component of the receiver; the power output interface is used to provide a 220V AC power supply to an external device; the second power module is used to convert the 220V AC power supply into a DC power supply suitable for each component of the transmitter.

[0019] Further, the transmitter further includes a second power input interface for accessing an external 220V AC power supply, and the second power module is also connected to the second power input interface.

[0020] Further, the receiver further includes:

[0021] A first power input interface for accessing an external 220V AC power supply;

[0022] The first power supply module is connected to the first power input interface and is used to convert the 220V AC power supply into a DC power supply suitable for each component of the receiver.

[0023] The transmitter further includes:

[0024] The second power input interface is used to access the external 220V AC power supply.

[0025] The second power supply module is connected to the second power input interface and is used to convert the 220V AC power supply into a DC power supply suitable for each component of the transmitter.

[0026] Further, the first encoding module includes a GS12170 chip.

[0027] Further, the model of the wavelength division multiplexing module is AWG CWDM4 Mux.

[0028] Further, the second encoding module includes a GS12170 chip.

[0029] Further, the model of the wavelength division demultiplexing module is AWG CWDM4 Demux.

[0030] Further, the receiver further includes a plurality of SDI output interfaces, which are connected to the output end of the optoelectronic conversion module and are used to output multiple 12G SDI signals.

[0031] Further, a plurality of HDMI signal input interfaces are provided with latches and are used to connect the fiber optic HDMI cable with latches.

[0032] The beneficial effects of the present utility model are:

[0033] The utility model converts multiple HDMI signals into one optical signal for transmission through optical fiber, and then converts it back into multiple HDMI signals at the receiving end, which can ensure the long-distance and safe transmission of HDMI signals. The maximum transmission distance of the optical fiber in the transmission cable can reach 10 - 20 km, improving the HDMI signal transmission distance and solving the problem of laying multiple cables in the middle link. The receiver is equipped with multiple SDI output interfaces, which can output 12G SDI signals to match other signals of the program live recording and production system. Multiple HDMI signals on site can achieve both HDMI output and 12G SDI interface output after long-distance signal transmission, effectively cooperating with current radio and television 4K devices for docking. 220V alternating current can be transmitted through the 0.75-square cable in the optical-electric composite cable. The receiver can provide 220V alternating current to the transmitter, and the transmitter can also supply power to nearby external devices without the need for an additional power supply line, solving the power supply problem of the on-site EFP flight case. The transmission from the camera to the transmitter uses a 100-meter HDMI optical fiber with push-pull self-locking, solving the problems of easy disconnection of the original interface and short transmission distance. Brief Description of the Drawings

[0034] Figure 1 Fig. is a schematic structural diagram of an embodiment of an EFP ultra-high-definition long-distance transmission system of the utility model;

[0035] Figure 2 Fig. is a schematic diagram of the interface panel of the transmitter of the utility model;

[0036] Figure 3 Fig. is a schematic diagram of the interface panel of the receiver of the utility model.

[0037] In the figure:

[0038] 100 - transmitter, 101 - HDMI signal input interface, 102 - first encoding module, 103 - electro-optical conversion module, 104 - wavelength division multiplexing module, 105 - power output interface, 106 - second power module, 107 - second power input interface, 200 - receiver, 201 - wavelength division demultiplexing module, 202 - opto-electric conversion module, 203 - second encoding module, 204 - HDMI output interface, 205 - SDI output interface, 206 - first power input interface, 207 - first power module. Detailed Embodiment

[0039] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0040] The terms "first", "second", and "third" in this application are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity or order of the indicated technical features. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship or movement conditions between components in a specific posture (as shown in the drawings); it should be noted that when a component is referred to as "fixed to", "disposed on", "connected to" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component, or there may be one or more intermediate components therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0041] As Figures 1 to 3 shown, to solve the problems of short transmission distance and poor anti-interference ability of ultra-high-definition signals in on-site program shooting, an embodiment of an EFP ultra-high-definition long-distance transmission system is proposed in the present utility model, which includes a transmitter 100, a receiver 200, and a transmission cable 300 connecting the two.

[0042] The transmitter 100 includes a plurality of HDMI signal input interfaces 101, a first encoding module 102, an electro-optical conversion module 103, and a wavelength division multiplexing module 104. The plurality of HDMI signal input interfaces 101 are used to receive HDMI signals from cameras. The first encoding module 102 is connected to the plurality of HDMI signal input interfaces 101 and is used to convert multiple HDMI signals into multiple 12G SDI signals respectively. The electro-optical conversion module 103 is connected to the first encoding module 102 and is used to convert multiple 12G SDI signals into multiple optical signals respectively. The wavelength division multiplexing module 104 is connected to the electro-optical conversion module 103 and the optical composite cable 300, and is used to convert multiple optical signals into one multiplexed optical signal and transmit it to the receiver 200 through the optical fiber in the transmission cable 300.

[0043] The receiver 200 includes a wavelength division multiplexing module 201, an optoelectronic conversion module 202, a second encoding module 203, and multiple HDMI output interfaces 204. The wavelength division multiplexing module 201 is connected to the transmission cable 300 and is used to convert a multiplexed optical signal transmitted by the optical fiber in the transmission cable 300 into multiple optical signals. The optoelectronic conversion module 202 is connected to the wavelength division multiplexing module 201 and is used to convert the multiple optical signals into multiple 12G SDI signals respectively. The second encoding module 203 is connected to the optoelectronic conversion module 202 and is used to convert the multiple 12G SDI signals into multiple HDMI signals respectively. The multiple HDMI output interfaces 204 are connected to the second encoding module 203 and are used to output HDMI signals.

[0044] In the embodiment of the present utility model, by converting multiple HDMI signals into one optical signal, transmitting it using an optical fiber, and then converting it back into multiple HDMI signals at the receiving end, the long-distance and secure transmission of HDMI signals can be ensured. The maximum transmission distance of the optical fiber in the transmission cable can reach 10 - 20 km, which improves the transmission distance of HDMI signals and also solves the problem of laying multiple cables in the intermediate links.

[0045] In some embodiments, the receiver 200 further includes multiple SDI output interfaces 205. The SDI output interfaces 205 are connected to the output end of the optoelectronic conversion module 202 and are used to output multiple 12G SDI signals. Through this embodiment, it is possible to output 12G SDI signals that match other signals in the program live recording and production system. Multiple HDMI signals on-site can simultaneously achieve HDMI output and 12G SDI interface output after long-distance signal transmission, which can effectively cooperate with current radio and television 4K devices for docking.

[0046] In some embodiments, the transmission cable 300 is an optical and electrical composite cable. The receiver 200 further includes a first power input interface 206 and a first power module 207. The transmitter 100 further includes a power output interface 105 and a second power module 106. The power output interface 105 and the first power input interface 206 are connected through the cable in the optical and electrical composite cable. The first power input interface 206 is used to access an external 220V AC power supply. The first power module 207 is connected to the first power input interface 206 and is used to convert the 220V AC power supply into a DC power supply suitable for each component of the receiver 200. The power output interface 105 of the transmitter 100 is used to provide a 220V AC power supply to external devices. The second power module 106 is used to convert the 220V AC power supply into a DC power supply suitable for each component of the transmitter 100.

[0047] In specific implementation, the 220V alternating current can be transmitted through the 0.75-square cable in the optical and electrical composite cable. The receiver 200 can provide 220V alternating current to the transmitter 100, and the transmitter 100 can also supply power to nearby external devices without the need to provide an additional power supply line, solving the problem of power supply for the on-site EFP flight case. The optical and electrical composite cable can adopt LEMO-type connectors, which are convenient for plugging and unplugging.

[0048] In some embodiments, the transmitter 100 further includes a second power input interface 107. The second power input interface 107 is used to access an external 220V alternating current power supply, and the second power module 106 is also connected to the second power input interface 107. In this embodiment, the transmitter 100 can also be powered by an external 220V alternating current power supply.

[0049] In some embodiments, both the first encoding module 102 and the second encoding module 203 include GS12170 chips. The GS12170 chip device fully supports the SDI interface standards from HD-SDI (ST 292) to UHD-SDI (ST 2082-1) at 12Gbps, including all Multi-Link SDI standards at these rates. When configured for HDMI bridging, the GS12170 fully supports the HDMI 2.0 standard, with a maximum support for 4Kp60 4:2:2 format. The functions of the GS12170 chip include: a fully standard-compatible SDI interface for bridging between HDMI 2.0; supporting 4K video formats up to 60Hz at 10-bit 4:2:2 sampling; converting between single-link and multi-link SDI interfaces, from HD-SDI to 12Gbps UHD-SDI. The mutual conversion between multiple HDMI2.0 signals and 12G SDI signals can be achieved through the GS12170 chip.

[0050] In some embodiments, the first encoding module 102 and the electro-optical conversion module 103 are implemented through a customized GS12170 chip module, and the 12G SDI signal terminal of the GS12170 chip is directly connected to the SFC optical module to output optical signals.

[0051] In some embodiments, the optical and electrical conversion module 202 and the second encoding module 203 are implemented through a customized GS12170 chip module, and the 12G SDI signal terminal of the GS12170 chip is directly connected to the SFC optical module to receive optical signals.

[0052] In some embodiments, the model of the wavelength division multiplexing module 104 is AWG CWDM4Mux. The AWG CWDM4 Mux optical module can multiplex four optical signals into one optical signal through wavelength division multiplexing.

[0053] In some embodiments, the model of the wavelength division demultiplexing module 201 is AWG CWDM4Demux. The AWG CWDM4Demux optical module can decouple a wavelength division multiplexed optical signal into four optical signals.

[0054] In some embodiments, multiple HDMI signal input interfaces 101 are provided with latches for connecting fiber optic HDMI cables with latches.

[0055] In specific implementation, a 100-meter push-pull self-locking HDMI fiber is selected for transmission from the camera to the transmitter, solving the problems of easy detachment of the original interface and short transmission distance.

[0056] In the embodiment of the present utility model, by converting multiple HDMI signals into one optical signal, transmitting it using optical fiber, and then converting it back into multiple HDMI signals at the receiving end, it can ensure the long-distance and safe transmission of HDMI signals. The maximum transmission distance of the optical fiber in the transmission cable can reach 10 - 20 km, improving the HDMI signal transmission distance and also solving the problem of laying multiple cables in the intermediate link; the receiver is provided with multiple SDI output interfaces, which can output 12G SDI signals to match other signals of the program live recording and production system. Multiple HDMI signals on-site can simultaneously achieve HDMI output and 12G SDI interface output after long-distance signal transmission, effectively cooperating with current radio and television 4K devices for docking; 220V alternating current can be transmitted through the 0.75-square cable in the hybrid fiber-coaxial cable. The receiver can provide 220V alternating current to the transmitter, and the transmitter can also supply power to nearby external devices, eliminating the need for an additional power supply line and solving the power supply problem of the on-site EFP flight case; a 100-meter push-pull self-locking HDMI fiber is selected for transmission from the camera to the transmitter, solving the problems of easy detachment of the original interface and short transmission distance.

[0057] The present utility model is not limited to the above optional implementation manners. Anyone can obtain other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in its shape or structure, as long as the technical solutions fall within the scope defined by the claims of the present utility model, they are all within the protection scope of the present utility model.

Claims

1. An EFP ultra-high definition long-distance transmission system, characterized in that: It includes a transmitter, a receiver and a transmission cable connecting the two; The transmitter comprises: Multiple HDMI signal input interfaces for receiving HDMI signals from cameras; A first encoding module, connected to the plurality of HDMI signal input terminals, for converting the plurality of HDMI signals into a plurality of 12G SDI signals respectively; An electro-optical conversion module, connected to the first encoding module, and used to convert multiple 12G SDI signals into multiple optical signals respectively; A wavelength division multiplexing module, connected to the electro-optical conversion module and the transmission cable, for converting multiple optical signals into one multiplexed optical signal and transmitting it to the receiver through the optical fiber in the transmission cable; The receiver comprises: A wavelength division multiplexing module, connected to the transmission cable, for converting one-way multiplexed optical signal transmitted by the optical fiber in the transmission cable into multiple-way optical signals; The photoelectric conversion module is connected to the wavelength division multiplexing module and is used to convert multiple optical signals into multiple 12G SDI signals respectively; A second encoding module, connected to the photoelectric conversion module, is used to convert multiple 12G SDI signals into multiple HDMI signals respectively; A plurality of HDMI output interfaces are connected to the second encoding module and are used to output HDMI signals.

2. The EFP ultra-high definition long-distance transmission system according to claim 1, characterized in that: The transmission cable is an optoelectronic composite cable, the receiver also includes a first power input interface and a first power module, the transmitter also includes a power output interface and a second power module, the power output interface and the first power input interface are connected through a cable in the optoelectronic composite cable; the first power input interface is used to access an external 220V AC power supply; the first power module is connected to the first power input interface, and is used to convert the 220V AC power supply into a DC power supply suitable for various components of the receiver; the power output interface is used to provide 220V AC power to external devices; the second power module is used to convert the 220V AC power supply into a DC power supply suitable for various components of the transmitter.

3. The EFP ultra-high definition long-distance transmission system according to claim 2, characterized in that: The transmitter also includes a second power input interface for connecting to an external 220V AC power supply, and the second power module is also connected to the second power input interface.

4. The EFP ultra-high definition long-distance transmission system according to claim 1, characterized in that: The receiver also includes: The first power input interface is used to connect to an external 220V AC power supply; A first power supply module, connected to the first power input interface, used to convert 220V AC power into a DC power supply suitable for various components of the receiver; The transmitter also includes: The second power input interface is used to connect to an external 220V AC power supply; The second power supply module is connected to the second power supply input interface and is used to convert the 220V AC power supply into a DC power supply suitable for various components of the transmitter.

5. The EFP ultra-high definition long-distance transmission system according to claim 1, characterized in that: The first encoding module includes a GS12170 chip.

6. The EFP ultra-high definition long-distance transmission system according to claim 1, characterized in that: The model of the wavelength division multiplexing module is AWG CWDM4 Mux.

7. The EFP ultra-high definition long-distance transmission system according to claim 1, characterized in that: The second encoding module includes a GS12170 chip.

8. The EFP ultra-high definition long-distance transmission system according to claim 1, characterized in that: The model of the wavelength division multiplexing module is AWG CWDM4 Demux.

9. The EFP ultra-high definition long-distance transmission system according to claim 1, characterized in that: The receiver also includes multiple SDI output interfaces connected to the output end of the photoelectric conversion module for outputting multiple 12G SDI signals.

10. The EFP ultra-high definition long-distance transmission system according to claim 1, characterized in that: Multiple HDMI signal input interfaces have locking buckles for connecting optical fiber HDMI cables with locking buckles.

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