Background:
As the Hdtv market continues to heat up, consumers are in need of being educated on the newest technology in order to make appealing purchasing decisions. There are a plethora of articles explaining the technical pros and cons of the 3 dominant Hdtv display technologies namely: Lcd, Plasma, and Dlp. However, one all- important, but overlooked highlight in choosing a Hdtv set is the type of Hd video connection. The video connections available for Hdtv are: component video, Dvi (digital video interface) and Hdmi (high definition multi-media interface). We will discuss briefly the pros and cons of each.
Hdmi Tv
Component video cable ordinarily referred to as R, G, B (Red, Green, Blue) easily consists of 3 separate cables because it distributes the 3 former color components to the display. All colors can be generated from weighted distribution of each Red, Green and Blue color components. Of the 3 Hd connection technologies available today, analog component video is the most mature technology.
-Advantage: Analog component video cable is mature and cost effective.
-Disadvantage: component video cables are analog! All Hdtv sets are inherently digital therefore extra digital to analog and analog to digital conversion is important in order to process the video. This extra conversion can introduce video artifacts. Since all Hdtv's are digital, it only makes sense to use an all- digital connection such as Dvi or Hdmi.
Dvi (digital video interface)as the name suggests is an all-digital video connection. Unlike analog component cables the Dvi interface transports the former digitized R,G, B video signals from the Hd source to the Hd display. Since it is all digital, no artifacts or degradation will be incurred. You will get Exactly the photo that the video source supplies with no degradation. Dvi connection is often found on Hdtv as well as Pc video cards.
-Advantage : Dvi is All-digital, so there is no photo degradation from source to display.
-Disadvantage : Digitizing R, G, B requires highly high bandwidth. The aggregate data rate of the digital R, G, B signals is 1.65 Gbps! The high bandwidth means that cable quality is foremost and also the link distance is limited. Typical link funds for a Dvi is ~ 15 ft.
Hdmi (high definition multi-media interface) is the newest state of art audio and video connection. Technically, Hdmi is selfsame to Dvi with 3 paramount differences. 1) Hdmi is a much smaller connector (it looks like an U.S.B. Connector), 2) Hdmi utilizes copy security called Hdcp (high definition copy protection) and 3) Hdmi carries multi channel digital audio. Hdmi, like Dvi, is All-digital therefore photo quality is "perfect" from source to display.
-Advantage: Hdmi is a particular digital video and Audio connection. Only 1 particular cable is needed to vehicle both audio and video! This significantly reduces cable clutter behind your theater setup.
-Disadvantage: Like Dvi, the link distance is small and a high quality cable is required because of the inherently high bandwidth required to vehicle digital R, G, B. Video.
Conclusion:
As the Hdtv market continues to mature, consumers will need to be educated on the Hdtv video connections available. We have outlined briefly the main features along with the pros and cons of each connection solution, so the consumer can make appealing a option in choosing the Hdtv video connections.
Hdmi, Dvi and Component Cables Explained
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