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Glossary of HDMI cable

Author:Frank
   Date:2009-05-17
1080i
Abbreviation for 1080 interlaced, where 1080 represents 1,080 vertical pixels. The 1080i format creates an image with 1080 lines, each with 1920 pixels, so it has a resolution of 1920*1080. 1080i is the minimum resolution necessary to enjoy HD program, and in HDMI specifications 1.3a, Catogery 1 is equivalent to 1080i resolution. Click here for more information about 1080i.

1080p
Abbreviation for 1080 progressive. 1080p has a resolution of 1920*1080 or 2,073,600 pixels totally in a progressive scan. The term can be referred to as full HD to differentiate it from other HDTV video modes, 1080p is the highest resolution currently on HDTV and HD-DVD system.  In HDMI specifications 1.3a, Catogery 2 cable, sometimes referred to as High-Speed HDMI cable, is designed specially for 1080p signal delivery.

1440p
An HD format consisting of 1920*1440 pixels in a progressive scan. Currently 1440p is limited to computer displays and no HDTV or HD-DVD systems have such high a resolution.


analog
The traditional electrical signal of video or audio, based on frequency information as opposed to data bits (or bitstream) as used in digital. Composite video, S-video and component video are all transmitted via anolog signal, as compared  with HDMI cable via full digital signal.

attenuation
Loss of signal strength on a cable length. Too long a HDMI cable, or a poorly built HDMI cable or connectors cause serious signal attenuaiton  and result in singnal transimission failure usually. In HDMI 1.3a, the upper limits of a HDMI cable attenuation are defined strictly in each frequency bands. Attenuation is the key parameter of a HDMI cable, which will differentiate one cable from the others. 

AWG

American Wire Gauge. A standard for determining the sectional square of the conductor. The gauge varies inversely with the actual conductor diameter, the smaller the number, the larger the conductor. The  most commonly used conductors in HDMI cables are 28AWG, 30AWG, 26AWG and sometimes 24AWG for long cable.


bandwidth

For a HDMI cable, the bandwidth refers to its data-carrying capacity. Much like the width of a highway that determines the amount of traffic that can pass, greater bandwidth means more data can be delivered. In HDMI specifications 1.3a, high-bandwidth is also called high-speed or Cat-2, which supports the bandwidth of up to 10.2 gigabits per second.

 


braiding shield


capacitance


Component Video


conductor


contact resistance


cross-talk


deep color


Delay


dielectric constant


digital


drain wire


DVI


eccentricity


extruding


foamed insulation


foaming ratio


fresh rate


HD


Impedance


insulation


interlaced scan


inter-pair skew


intra-pair skew


jacket


lay


lip sync


mated impedance


progressive scan


shield


shield coverage


S-video


tinned wire


twisted pair


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