4k video is an ultra high definition video format with a resolution of 3840 × 2160 pixels, which is four times the resolution of high-definition video. 4k video has the characteristics of high definition, High dynamic range, high frame rate and so on, which can provide a more realistic, more detailed and more shocking visual experience. The application scenarios of 4k video include movies, television, games, live streaming, VR, etc., involving multiple fields such as culture, entertainment, education, healthcare, etc.
The transmission technology of 4k video refers to the process of sending 4k video signals from the source to the target, involving encoding, compression, transmission, decoding, and other links. Due to the large amount of data in 4k videos, high-speed, low latency, and low-power transmission technologies are required to ensure the quality and smoothness of 4k videos. Currently, there are several 4K video transmission technologies available in the market:
HDMI copper wire: HDMI is a fully digital image and sound transmission line that can be used to transmit audio and video signals without any compression. HDMI can provide a transmission rate of up to 48Gbps, supporting 4k video plug and play without the need for additional power supply. However, the transmission distance of HDMI copper wire is limited, with a maximum length of only 20 meters, and it is prone to electromagnetic interference.
Transmission+reception box: This type of transmission method is commonly used in HD BaseT and HDMI extender products. HD BaseT integrates audio and video, network, control signals, and power supply through network cables, consisting of the sending and receiving ends. It can transmit up to 100 meters and supports 4k video within a 60 meter range. The HDMI extender extends the transmission distance of HDMI signals through optical fibers or coaxial lines, up to a maximum of 300 meters. This type of product can solve the problem of limited transmission distance of HDMI copper wire, but it requires additional power supply, complex wiring, and high cost.
HDMI active fiber optic cable: HDMI active fiber optic cable is a technology that transmits HDMI signals through fiber optic or hybrid optical cables, achieving 4k video transmission without compression, loss, and delay. HDMI active optical cables have the characteristics of lightweight, thin, and soft, making them convenient for wiring through pipes, free from electromagnetic interference, and do not require external power supply. HDMI active optical cable can support up to 300 meters of 4k video transmission distance, making it the most cost-effective 4k video transmission technology in the market.
Based on the above introduction, it can be seen that 4k video transmission technology is constantly developing and innovating, providing strong support for the popularization and application of 4k video.
