wa8yxm wrote:
Standard Def is 4x3
Hi Def is 16x9
Does not matter if Sat, Cable or OTA.
Actually 16:9 CAN be SD, 720 or 1024i or "p"
16:9 is nothing more than the SCREEN width to height RATIO and has nothing to do with High Definition.
So, it IS possible to "broadcast" 16:9 IN SD and even find it with DVDs to boot.
But you normally will not "find" 4:3 "broadcast" as HD since the HD specs really do not "support" 4:3 directly.
But it is possible to downgrade 16:9 HD broadcast to TO FIT a 4:3 SD TV screen. This is done by "down scaling" the source which will add "letter box" (bars on top and bottom) which allows the entire width of the source to show on the screen instead of clipping the sides or using pan and scan.
At the same time it is possible to fit a 4:3 source on a 16:9 screen by adding the side bars (black bars on the sides). Some HD TVs can "upscale" the 4:3 source to make the SD source look better on the HD TV.
Honestly, I spent a good bit of my life repairing TVs and so far I have not been able to see all that much "difference" between SD and HD. But perhaps it is because I spent a lot of time setting up analog SD TVs PROPERLY resulting in extremely sharp pictures. I do have a couple of new HD TVs and really the difference in sharpness between SD and HD STILL isn't worth me replacing all of my older SD TVs..
I refuse to pay Dish EXTRA for HD programming, just silly to do so.
Even a few years ago when I had Dish installed at my home. I had a 13" 4:3 portable TV for the Dish installer to use in my basement where the coax was going to enter my house. That guy was simply amazed at how good that picture was. He said that he RARELY ever sees HD TVs LOOK THAT GOOD.