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The Curious Bag
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High-Definition Multimedia Interface (HDMI) cables are a way of transferring audio and video signals between multimedia components. They transfer signals in a similar fashion to a coaxial cable or an RCA cable.
History
Early televisions, computer monitors, stereo systems and other multimedia products needed a way to receive signals from outside sources. Early solutions to this problem included many different types of cables with various types of connectors. These cables transmitted analog signals, and they grew in size and number as multimedia or computer systems got more complex.
HDMI basics
An HDMI interface allow users to transmit both audio and video over one cable and still maintain good quality. HDMI is a digital interface and the cables are transferring digital information, which allows for a much more precise signal. HDMI will transfer high-definition (HD) video as well as up to eight channels of audio.
HDMI and computers
Before HDMI, digital video signals were sent between computers and monitors via digital video input (DVI) cables. HDMI was meant to replace DVI.
Advantages
One cable to transmit HD signals is a major advantage, as is the simplicity of hookup. Also, the signal is virtually noise-free.
Disadvantages
HDMI cables are more expensive than their predecessors. In addition, it is difficult to find long cables.
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