On hi-definition tv- Why does the picture size change? On some programs it fill the peak,others it's square.

The bigger shows seem to hold the full screen, resembling the Today show, or Jay Leno. Other shows like our local report have a more square picture, beside black screen on respectively side. Shows from the network when they enjoy the smaller picture will have a filler on respectively side, with a logo or something, so it is not simply black. I have the tv's aspect ratio set as all-embracing as it goes, so it seem like the picture size comes from the transmitting station , or the see. Why do they do this? if a person buys a hi-def set, we would close to a full sized picture!


Answers:    Just because a channel broadcasts surrounded by HD doesn't mean the programming have been record in HD. And, if a non-HD program is broadcast within HD, it retains the non-HD aspect ratio of 4:3 (the picture is 4 parts wide by 3 parts high).

The aspect ratio of an HD picture is 16:9 (16 unit wide by 9 unit high). So, when a non-HD program is shown on an HD screen, the picture is not as general as the screen and it shows black bar on the sides of the picture where within is no video information.

This happens deeply when watching an HD program (like a sporting event) when the commercials are not recorded contained by HD. During the commercials, the black bars appear. And, when the programming go back to the HD picture, the blind is now full again.
not merely does your tv have aspect ratio's, but tube shows are brodcasted in reliable ratio's as well. most of the elder stuff is brodcasted in 4:3, wich fit most tube tv's. but newer tv's tend to hold a 16:9 ratio, and some show's are brodcasted like that very soon.

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