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Long-distance HDMI® signal transmission solution: Principle and application analysis of HDMI® optical transceiver

2023-05-11 18:50:43 ekl

Introduction to HDMI Optical Transceiver

        HDMI optical transceiver is a high-definition video transmission device, which uses optical fiber technology to transmit HDMI signals over long distances, high speed, and lossless, and is generally used in pairs. It has the characteristics of long transmission distance and strong anti-interference ability, and is suitable for the long-distance transmission requirements of high-definition video signals.

Working principle of HDMI optical transceiver

        An HDMI optical transceiver is usually composed of two parts: a transmitting end and a receiving end. The transmitting end converts the HDMI electrical signal into an optical signal, transmits it to the receiving end through optical fiber, and the receiving end converts the optical signal back to an HDMI electrical signal. The whole process realizes high-quality remote transmission of HDMI signals, and at the same time overcomes the problems of signal attenuation and interference during long-distance transmission of traditional HDMI cables.

Advantages and disadvantages of HDMI optical transceiver

        Advantages of HDMI optical transceiver:

        Long transmission distance: HDMI optical transceiver can realize long-distance transmission of several kilometers, far exceeding the transmission capacity of similar electronic equipment.

        Good signal quality: the optical fiber transmission signal is stable, without signal attenuation and interference, ensuring high-definition picture quality.

        Safe and reliable: Optical fiber transmission is not affected by electromagnetic interference and has strong anti-interference performance.

        Low power consumption: low power consumption for optical fiber transmission, energy saving and environmental protection.

        Disadvantages of HDMI optical transceiver:

        Relatively high cost: The price of HDMI optical transceivers is higher than that of ordinary HDMI cables.

        Complicated installation: Fiber optic lines require professionals to install and maintain.

Types of HDMI Optical Transceiver

        According to whether the HDMI optical transceiver supports the KVM function, there are generally two types of conventional HDMI optical fiber extender and HDMI KVM optical fiber extender. Conventional HDMI fiber optic extenders generally only extend the HDMI signal to a certain distance through optical fiber, and have no other functions, some of which support 3.5mm audio transmission together, or convert HDMI audio to 3.5mm audio output at the receiving end (such as eKL- HF200, using single-mode SC interface single fiber to extend 20 kilometers, audio and video synchronous transmission, support rack installation); while HDMI KVM fiber optic extender is integrated with USB function, connect the keyboard and mouse at the receiving end, earphones, monitors The computer can be controlled remotely, and the user experience is the same as that of the host in real life, but the resolution and refresh rate may not be as high as the local ones (such as eKL-HE001, which uses a single-mode SC interface optical fiber cable, which can be used to extend 20 kilometers for engineering projects ;Support infrared, 3.5mm audio synchronous extension, support 1920x1080p 60Hz high-definition resolution, local loop out HDMI display).

HDMI Optical Transceiver and HDMI KVM Optical Transceiver

Application field of HDMI optical transceiver

        Conference room: HDMI optical transceiver can realize remote high-definition video conference and improve conference efficiency.

        Education: Support remote high-definition teaching and realize video transmission between classrooms.

        Security monitoring: Remotely transmit high-definition monitoring images to improve the effect of security monitoring.

        Digital media broadcasting: meet the long-distance transmission requirements of high-definition signals in TV stations, cinemas and other occasions.

Application Case of HDMI Optical Transceiver

        A large conference center needs to realize high-definition video conferencing in multiple rooms. Due to the long distance between rooms, ordinary HDMI cables cannot meet the transmission requirements. After investigation, finally choose to use HDMI optical transceiver for signal transmission.

        In this case, the HDMI optical transceiver at the sending end is connected to the demo computer in the meeting room, converts the HDMI electrical signal into an optical signal, and transmits it to the HDMI optical transceiver at the receiving end through optical fiber. The receiving end converts the optical signal back to the HDMI electrical signal, and then outputs it to the display in the remote conference room. In this way, high-definition picture quality and stable transmission can be guaranteed even if the distance between meeting rooms is long. After actual use, the HDMI optical transceiver successfully solved the problem of multi-room remote high-definition video conferences in large conference centers, improved conference efficiency, and was well received by users.

        HDMI optical transceiver is an efficient and reliable high-definition video transmission equipment, which can meet various remote high-definition signal transmission needs. Although its cost is relatively high, in many application scenarios, its superior performance and stability are enough to make up for the cost difference, making it an ideal choice for many users.