What is the role of magnetic HDMI line

We can often see some cylindrical object connecting line both sides of the cable is raised, and is sealed by a layer of plastic wrap, this little thing is magnetic. The magnetic ring is made of high density molding core making, in High frequency current to form the conductor surface (interference signal) separation effect is very good.

The magnetic ring is one of the HDMI line to maintain stable transmission anti-interference shielding materials, and its role is to filter high frequency interference signals, the purification of transmission signal. In the cable transmission without magnetic ring and shielding foil, will be or more.

Or less electromagnetic interference, watch the effect of impact. For the performance of the screen snow, water ripple, image dithering. So is the VGA line!

HDMI transmission line is a digital signal, the anti-interference ability than the analog signal is strong, and the HDMI line is usually with aluminum foil shield, so the HDMI line in a certain length without using the magnetic ring. But when the transmission

A distance of more than 5 meters after the interference signal accumulation, so using magnetic filter these low frequency interference signal effect will be very obvious. Therefore, the HDMI line is also need to use the ring to protect.