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hdmi vs. component...

akron05
12-06-2010, 09:55 PM
What REALLY produces better video quality on 720p or 1080i? I realize that component can't do "upconverting" or anything, but assuming native resoultions up to 1080i, what really does a better job?

I own several sets of each cable type and haven't been able to visually see a difference, except for colors appearing a bit more "natural" on my Samsung plasma, but no discernable difference on my Vizio LCD, both sets with a native resolution of 720p. Using Verizon FIOS.

BIslander
12-06-2010, 10:45 PM
What REALLY produces better video quality on 720p or 1080i? I realize that component can't do "upconverting" or anything, but assuming native resoultions up to 1080i, what really does a better job?

I own several sets of each cable type and haven't been able to visually see a difference, except for colors appearing a bit more "natural" on my Samsung plasma, but no discernable difference on my Vizio LCD, both sets with a native resolution of 720p. Using Verizon FIOS.1080 has more resolution, which means a sharper image. Interlacing is only a problem when it comes to motion on TV broadcasts because the two fields that are interlaced to create the picture do not come from the same frame. But, when the source is 1080p, such as a Blu-ray disc, that's not even an issue.

Meanwhile, your TV sets are almost certainly not 720. They are most likely 768. If you feed them a 720 image, the set will have to manufacture the other 48 lines that don't exist. If you feed them 1080, they will scale down to 768. You can expect a sharper image scaling down from 1080 than up from 720.

But, there are lot of other factors involved, such as how well the devices in your picture chain handle interlacing and deinterlacing. There's no hard and fast rule about what's going to look better. Give it a try both ways and see what you like better.

The same goes for HDMI vs. analog cables. The picture always has be rescaled to the set's native resolution. There are so many variables in that process, depending on the specific equipment you are using, that you really just have to try it both ways and go from there.