Hdmi, Dvi and Component Cables Explained

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.

Hdmi, Dvi and Component Cables Explained

-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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The Truth About Hd Tv's - Myths Explained

Flat Tvs have trouble retaining resolution when displaying fast inviting images.

This is not strictly true, although it can work on some Televisions. Plasma Tvs can present inviting objects without loss of crispness or detail. As the pixels can be lit, and de-lit roughly abruptly there is no loss of image capability depending on the scene speed.

Hdmi Tv

Some Lcd Tvs any way do suffer from problems. Even the fastest Lcd screens can suffer with some degree of movement obscuring as the pixel must be lit, and de-lit from an electronic charge. Lcd technology is getting better however, although you should "try before you buy" to see if the set you are interested in suffers from this.

The Truth About Hd Tv's - Myths Explained

Screen burn.

Although some of the very early Tv's suffered from screen burn, it is no longer a qoute so you should not worry about this. You can now play computer games or watch channels with static logo's on a Tvs without worrying about varied static image elements being on the screen for a long period of time. Some Tv's do suffer a small number of image retention - that is, you may see a remnant of the image still there as soon as you turn it back on, any way after a short while of watching someone else channel this completely disappears.

Plasma Tv's are not a car - They do not need refilling

Many population think that plasma screens need to have the gas refilled in order for it to work. This is completely untrue and you do not need to worry about this.

Lifespan - it's not dead and buried yet, dear.

When a plasma Tv lifespan is quoted, it is regularly in (thousands of) hours. However, many take this as when the Tv will break. This is not the case. The actual lifespan quoted is for the Tv to to run until "half brightness". That is - the Tv will still work, but the photo may not be as awesome as when you first got it. Time to relegate it to the bedroom/study/games room and buy a new model.

Flat Tvs have poor viewing angles.

This myth again depends on the set, and the technology. Plasma Tvs can nothing else but be watched from very wide viewing angles without any needful loss in color or contrast, thanks to the fact that they emit light directly from each of their screen cells or pixels.

Some Lcds do have problems displaying pictures from wide angles and again, try before you buy.

Higher Resolution is not always better

It is a coarse myth that a higher screen resolution will give a better picture. This is any way not always the case.

More importantly is the screens internal processing (i.e how it displays the picture) and at the time of writing, the pioneer plasma screens, although the only have 1024x768 resolution will display a better image than sets of 1920x1080 (1080p). Before rushing out and buying the latest-and-greatest set (don't all manufacturers claim their set is better than all the others?) you should ask a local electronic store to hook up 2 or 3 screens you have carefully buying and assess the image. Not every has the same opinion on how they like their images to look.

The Truth About Hd Tv's - Myths Explained

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