Lot Better

How come some channels look a lot better than others on my hdtv?

I have HD channels. it looks awesome. thats not what Im talking about.

Im talking about, one cable channel (like animal planet, lets say) and fox and abc.

the fox and abc channels look so grainy and bad, its almost unbearable.

What is up with that? Is it the camera, the station, the way its broadcast, or a combination?

The first problem is the cameras used to film HD content. NOT all HD cameras produce great, clear & sharp content. I see this on the local ABC (720p) & NBC (1080i) news broadcasts. One report can be a great pic and the next (filmed with a different camera) can be grainy. The camera used does have a big impact on the quality of HD content.

The next issue is the cable companie's problem. They compress channels so much that it affects the quality of their content. Cable companies maximize profits by maximizing the number of subscriber channels on their system. Their profit motive leads to part of your problem.

Finally, digital broadcasts do have limited bandwidth and it is possible to momentarily lose some quality due to these limitations. These types of quality issues are usually seen following scene changes or during paning shots with lots of on screen activity or motion. It's possible to overwhelm the digital Mpeg compression alogorithum and creat on-screen pixelization (blocking), though this tends to be a momentary loss of quality.

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