HDMI cable length and the effect it has on digital signals.
HDMI is also known as High-Definition Multimedia Interface and it is a type of audio/video connection for use with a wide range of consumer electronic products. Examples of uses include connecting standard and hi-def TVs and displays to computers, dvd players, and gaming consoles. HDMI, according to maker Silicon Image, is compatible with a device’s DVI port as well.
What is the importance of cable length for HDMI?
One major consideration in determining how long the cable should be is cost. HDMI technology is more expensive than component video and composite video connections. The longer the cable the higher the cost. Therefore you should only buy the length that you’ll need.
Another important consideration is the concept of attenuation. According to the website Tech-FAQ in some connection cables the length can affect the quality of the signal traveling along the connection. Electrical signals can “seep” out of the cable along the way. This can happen with a wide variety of connections such as USB connections. With HDMI, if the cable is too long, the signal can become degraded and the quality of the audio and video signals may be affected. Having the shortest cable possible is the best way to avoid attenuation.
Is there a maximum length for HDMI cables?
A quick look at HDMI cables for sale shows that cables are available in a wide range of lengths, typically ranging from 3 feet to upwards of 50 feet in length. While the makers of HDMI technology have not listed a maximum length before quality or functionality is an issue; again it is important to keep the length as short as possible.
This is different from other connection technologies. For example, USB connection technology is limited by the length. The makers of USB technology designed it so that 5 meters is the maximum length allowable. After 5 meters, the signal will not travel properly.
Keeping the cable to the minimum length that you need for a specific applicaiton is a good way to reduce the expenses associated with HDMI cable. It will help to minimize the occurrence of attenuation which will in turn ensure you get high quality sound and video on your connected displays.
For more information about HDMI cables and technology you can visit the official HDMI website at the following address: http://www.hdmi.org/ .