HDMI cables are usually used to connect audiovisual equipment to TVs and monitors, so most of them are short-distance transmission, usually only 3 meters long; What should users do if they need more than 3 meters? If you continue to use copper wire, the diameter of copper wire will become larger, it will be difficult to bend, and the cost will be high. Therefore, the best way is to use optical fibers. HDMI AOC optical hybrid cable product is actually a product of technical compromise, the original intention in the development should be that all HDMI 19 cables are optical fiber transmission, which is the real optical fiber transmission HDMI, but because the 7 cables of the low-speed channel use VCSEL+ multimode fiber low-speed signal encoding and decoding is more difficult, simply the developer only the high-speed signal in the 4 pairs of TMDS channels to VCSEL+ multimode fiber transmission, the remaining 7 electronic wires are still directly connected by copper wireIt was found that after the high-speed signal was transmitted by optical fiber, due to the extension of the TMDS signal transmission distance, the optical fiber HDMI AOC could be transmitted to 100 meters or even longer.

Optical fiber HDMI AOC hybrid cable because the low-speed signal still uses copper wire transmission, the problem of high-speed signal is solved, and the problem of low-speed signal copper transmission is still not solved, so it is prone to various compatibility problems in long-distance transmission. And all this can be completely solved if HDMI uses all-optical technology solutions. All-optical HDMI uses 6 optical fibers, 4 to transmit high-speed TMDS channel signals, 2 to transmit HDMI low-speed signals, and an external 5V power supply is required at the RX display end as the excitation voltage for HPD hot plugging. After adopting the all-optical solution, HDMI, high-speed TMDS channel and low-speed DDC channel are changed to optical fiber transmission, and the transmission distance is greatly improved.