HDMI cables can be used to connect anything; right from computers and DVD/Blu-ray players to PS3 gaming consoles.
HDMI devices were first introduced to the consumer market in 2003 when HD televisions were first introduced.
Connecting HDMI cables
HDMI cables connect to media sources like cable boxes, personal computers, DVD players and video gaming consoles and also radios and televisions. They carry digital signals from one device to another.
HDMI cable layout
Generally HDMI cables have 19 pins, each one having a different function. Nine of the pins convert the data received into a digital format while three of them are used to channelise data. Three other pins are used to continuously convert and transmit data.
Transmission of data
HDMI cables have a pair of twisted wires which first convert the data and encode it to ensure that the data does not get degraded in the course of sending it from one device to another. The other device receives the data sent via the cable and decodes the information. The cable relays two types of data; one wire sends the data in a true form while the other wire sends data in the inversed form. The receiving device decodes both sets of data and compares the two to check for any degradation and the better of the two is used for the output.
There is no specific length of an HDMI cable. The cable should not be too short as it might damage your devices by pulling on it. But a long length of a cable can be prone to signal degradation.