HDMI cable and electronics devices
HDMI cables (High-Definition Multimedia Interface) Cables extend a popular audio / video interface to consumer electronics devices for transmitting uncompressed digital data. It becomes an alternative to analog standard. Devices are being manufactured in accordance with various versions of specification, indicated by a number, such as 1.0, 1.2, or 1.3. Specification of subsequent version shall use the same kind of cable but will provide increased bandwidth and other enhanced transmission capabilities over the cable.
To compensate attenuation of signal and interference, adaptive equalization techniques is also employed to achieve longer cables. Two categories of cables are defined to be used with HDMI 1.3 specification. The category-1 HDMI cable is available in market as “Standard” where as Category-2 cables are known as “High Speed” HDMI cables.
Carrying the signal to HDMI to a greater distance needs an active device called HDMI extenders. Copper HDMI cables can carry signals upto 12 to 15 m. To achieve distance of around 50m HDMI extenders uses Ethernet Cables. Ethernet cables being light, thin and soft provides better alternative to thicker, heavier and rather stiffer HDMI cable. Companies have developed HDMI extender with UTP interface extender for facilitating use of CAT-5 or CAT-6 Ethernet Cable. Use of CAT-6 Ethernet Cable also alleviates EMI problems in such HDMI extenders.
The HDMI cable uses different types of socket. Cables using Type A and Type B connectors are elaborated in HDMI 1.0 specification, where as Type C, Type D connectors are used with hdmi cables for HDMI 1.3 and HDMI 1.4 specification respectively.
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