HDMI, DVI and Component Cables Explained

Background:

As the HDTV market continues to heat up, consumers need the latest technology designed to make intelligent decisions. There are a lot of articles explaining the technical pros and cons of the three dominant HDTV display technologies namely: LCD, plasma and DLP. However, before the important, but characteristic when choosing an HDTV set is the kind of high definition video connection. The HDTV video connections are: componentVideo, DVI (Digital Video Interface) and HDMI (High Definition Multimedia Interface). We must briefly the advantages and disadvantages of each.

Hdmi

Component video cable commonly referred to as R, G, B (red, green, blue) actually consists of 3 separate cables because it is the three primary colors to distribute the ad. All colors can be derived from the weighted distribution of individual components red, green and blue are produced. Of the 3 HD connection technologies available today, analog componentThe video is a mature technology.

Advantages: analog component video cable is mature and affordable.

-Disadvantage: component video, analog cable! All HDTV sets are inherently digital therefore extra digital to analog conversion and analog to digital is needed to process the video. This extra conversion can introduce video artifacts. Since all HDTV is digital, it only makes sense to use a fully digital connection like DVI or HDMI.

DVI (Digitalimplies Video Interface) as the name is a fully digital video connection. Unlike analog component cables the DVI interface transports the original digitized R, G, B video signals from HD source to HD display. Since everything is digital, there are no artifacts or degradation. You get exactly the image that the video source does not provide any breakdown. DVI connection is often found on HDTV and PC graphics cards.

Advantages: ALL-DVI is digital, so there is no pictureDegradation from source to screen.

-Disadvantage: Digitizing R, G, B requires extremely high bandwidth. The aggregate data rate of the digital R, G, B signals is 1.65 Gbps! The bandwidth means that cable quality is important and also the distance of the connection is limited. link budget of a typical 15 foot DVI ~

HDMI (High Definition Multimedia Interface) is the latest state of the art audio and video connections. Technically, HDMI is identical to DVI with 3 notable differences. 1) HDMIis a much smaller connector (it looks like a USB socket), 2) HDMI uses HDCP copy protection called (copy protection for high-definition) and 3) HDMI with multichannel audio. HDMI, DVI, like all-digital therefore picture quality is "perfect" from source to screen.

Advantage: HDMI is a single digital video and audio connection. Only one cable is required for the transport of audio and video! This reduces cable clutter behind the theaterSetup.

-Disadvantages: as DVI is limited to the distance and connection of a high quality cable is necessary because of the inherently high bandwidth digital R, G, B video transport necessary.

Conclusion:

As the HDTV market continues to mature, consumers will need to be educated on the HDTV video connections available. We briefly the main features, together with the advantages and disadvantages of each connection solution outlined, then the smart choice for consumers in the choice ofHDTV video connections.

HDMI, DVI and Component Cables Explained

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