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I don’t know if you have ever encountered the problem that when you connect a slightly longer HDMI cable, there will be more noise and flickering on the screen, which is confusing. This is because the HDMI signal is interfered or attenuated during transmission. Coupled with the long-distance transmission DeBuff, the image clarity and stability will be worse.

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To avoid HDMI signal attenuation, Xiaochi will disclose the following three magic weapons to the friends: HDMI線, HDMI extender, and graphics card equipped with HDMI Retimer technology.

Without the help of external devices, a more convenient way is to use a cable to directly connect to achieve the purpose of extending the signal.

1. HDMI extension cable
在狹小的空間環境中, HDMI延長線可以說是一種高性價比的延長方式. 傳統的HDMI銅線主要根據線芯的質量來決定傳輸距離. 劣質電纜可能有噪音等問題. 優質線纜一般可確保高清訊號傳輸距離 15-20 米, 而且價格也比較實惠，很受歡迎.

2. HDMI fiber optic cable
HDMI fiber optic cable seems to have no disadvantages except for its high price. Optical fiber cables are not only light and bend-resistant, but also come with optoelectronic module chips and use optical signal transmission. Signal transmission can be extended to 100 米, and the attenuation is very low, which can ensure picture clarity and sound realism. It is suitable for occasions where high-definition image display devices and large-area wiring connections are required.

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Extender transmission
If you want to build a professional application scenario, you need long-distance and one-to-many, or many-to-many high-definition signal transmission, then the HDMI extender is a wiser choice.

1. HDMI network extender
Using an HDMI network extender, the HDMI output signal can be extended to 50-200 米. This type of extender is usually used in pairs, with two ports on the front and back, an HDMI interface on the front, and an RJ45 network interface on the back. Transmission through network cables and routers in the middle can achieve one-to-one and one-to-many signal extension. Compared with copper wires, its transmission distance is longer, and compared with optical fiber cables, its price is more affordable.

When transmitting HDMI high-definition video surveillance or splicing large-screen displays, if the transmission distance exceeds 120 米. Ordinary extenders will have problems such as mosaics and color distortion at this time. HDMI fiber extenders are designed for this purpose. They have large bandwidth, more stable signals, and can extend the transmission distance to kilometers, but are generally used as professional signal transmission systems such as multimedia teaching.

New idea: HDMI Retimer graphics card
In addition to the above two methods, the 20th anniversary graphics card launched by GALAX this year also provides a new idea for extending the HDMI transmission distance.

GALAX’s 20th anniversary graphics card is the first graphics card in the industry to be equipped with HDMI Retimer technology, thanks to the Parade PS8419 chip. This technology starts from the source, amplifies and reconstructs the HDMI signal of the display source to improve the signal strength and quality, thereby ensuring that the HDMI signal is still stable and high-definition in long-distance transmission.

Not only that, the HDMI Retimer technology equipped with GALAX graphics cards is also suitable for multiple monitors, long-distance signal transmission and high-demand professional application scenarios, which can bring users a more stable and high-quality visual experience.