Hdmi最長距離

HDMI（高清晰度多媒體接口）是一種數字接口 used for transmitting high-definition audio and video signals between devices such as TVs, monitors, projectors, and media players. The maximum length of an HDMI cable can vary depending on several factors, including the quality of the cable, the resolution and refresh rate of the video signal, and the presence of active HDMI repeaters or extenders.

For standard HDMI cables (without boosters or amplifiers), the maximum recommended length is typically around 50 feet (15 meters) for high-definition signals. However, in practice, signal quality can start to degrade at lengths shorter than this, especially when dealing with high-resolution signals like 4K or 1080p at 60Hz.

If you need to extend the length of your HDMI connection beyond what a standard cable can provide, you can use active HDMI extenders, which can transmit signals up to 300 feet (91 meters) or more using either a single cable or a dual-cable setup. These extenders typically use either a Cat5e/6 Ethernet cable or a fiber optic cable to carry the signal, and they may include built-in signal boosters to ensure a strong, clear signal.

It's important to note that as the length of the HDMI cable increases, so does the risk of signal degradation, interference, and other issues that can affect the quality of the audio and video signal. Therefore, it's always a good idea to use the shortest cable possible and to invest in a high-quality cable and/or extender to ensure the best possible performance.