Over a short length, the cables don't make a difference. What is separate is that in the case of the component cables, the Tv has to convert the component analog signal to digital. In the case of the Hdmi cable, the signal is already digital. So there may be a perceptible discrepancy if the Tv doesn't do the conversion well.
Putting aside photograph quality, the imagine you should use the Hdmi cable is that it carries the Hdcp signals, component does not. If the source device, say a cable box, looks for the Hdcp handshake, and doesn't get it, it Will not yield an Hd signal. So if you want to watch Hbo in Hd from a cable box, you have to use Hdmi or Dvi.
Top HDMI Cables
I use the component cables. Then again, I spent about on them (gold plated ends, large conductors, thick shielding, etc) for both the video components and audio channels. And, I bought them a few years ago, before Hdmi cables were even around. The discrepancy in operation in the middle of top-end component video cables and Hdmi cables is negligent. But, if you just use thorough Rca cables - like the cheap ones the cable Tv company gives you - you won't get as good of capability as the Hdmi cables.
As Hdmi cable connections become more and more widely used, we are often asked: which is better, Hdmi or component video? The answer, as it happens, is not cut-and-dried.
First, one note: everything said here is as applicable to Dvi as to Hdmi; Dvi appears on fewer and fewer consumer electronic devices all the time, so isn't as often asked about, but Dvi and Hdmi are essentially the same as one another, image-quality-wise. The needful differences are that Hdmi carries audio as well as video, and uses a separate type of connector, but both use the same encoding scheme, and that's why a Dvi source can be associated to an Hdmi monitor, or vice versa, with a Dvi/Hdmi cable, with no intervening converter box.
The upshot of this article--in case you're not inclined to read all the details--is that it's very hard to predict either an Hdmi relationship will produce a better or worse image than an analog component video connection. There will often be needful differences in the middle of the digital and the analog signals, but those differences are not potential in the relationship type and instead depend upon the characteristics of the source device (e.g., your Dvd player) and the display device (e.g., your Tv set). Why that is, however, requires a bit more discussion.
Several people a day are searching for an interconnection clarification by trying to associate Hdmi to Component outputs through a cable for their high-definition equipment. Unfortunately, this isn't a matter of rearranging wires and having the right type of connector. There is a basal analog versus digital discrepancy problem similar to the upcoming digital broadcast Tv switchover versus your current rabbit ears that receive analog broadcast signals. They aren't compatible and leave people confused just like the poor fellow in the commercial.
Component video is based on an analog format. With analog signals, the voltage signal on the wire is in a wave format and how the wave changes in height is what is important. Theoretically it has an infinite amount of values in the middle of zero and the maximum, somewhat like the variable windshield wipers I had on an old Thunderbird. With the Hdmi or Dvi format, these are based on digital signaling. Digital as you probably have heard, uses ones and zeros with a series of pulses all at the same height and they are either present or missing. At the other end, processing tool reassembles the information. In a 4-bit binary coding, you can have 1 of 16 separate values as 4 1's and 0's assembled as a group can have 16 separate combinations. So tool at the other end of the cable that is detecting signals and finding for analog sine waves would put out total gibberish if it just received pulses of 1's and 0's.
Some solutions are very easy. If an Hdmi or Dvi yield is ready on both boxes, use those. The discrepancy in the middle of Dvi and Hdmi is that Hdmi caries the audio in increasing to the video signals. But Dvi is just as good and other than the charge of an extra audio cable, that will solve your problem. If you were trying to use the Component outputs because you already had the Hdmi port tied up, they make Hdmi switch boxes that are fairly inexpensive where you can plug complicated Hdmi cables in on one side with one yield on the other.
Via component cables an analog signal is transferred. Hdmi is digital. Among other things this has the following advantage: As long as the data is transferred correctly you have the perfect image data arriving at your Tv. There won't be a singular pixel discrepancy in what the 'sending' device puts out and what reaches your Tv. Component signals (as all analog signals) can vary in capability and you can get disturbances.
So actually: At first watch Hdmi cables might appear more costly than component cables, but that's not entirely true. For Hdmi the required capability of the cable is associated to the distance you need. If you only need to cover a short distance (two or three meters) a cheap cable will give you the best potential follow that could ever be achieved by any means ... It's digital ... The cheap cable has no sway on the image capability ... Just like the network cable your computer uses to hook up to the internet has no sway on the image capability of videos you download / stream.
Of procedure this doesn't mean component is bad: Among affordable analog video connections it's probably by far the best, but Hdmi just has the advantage of not having to care about the signal being unintentionally "affected" by covering influences while transfer. So if you can: Hdmi is the better choice.
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