Thought I'd try to pull this from other threads
SD is broadcast at 720x576 pixels, in largely 16x16 pixel blocks depending how the picture has changed from previous. As far as I know it doesnt know anything about interlacing
A number of control flags transmitted with the programme tell the display whether the image should be displayed 'as is' to give a 4:3 picture, or stretched widthways by a third to equivalent of 1024x576 a 16:9 picture or whether some intermediate such as 14:9 to show an original 4:3 image on a 16:9 display
Phew
However it's not quite as simple as that as of the 720 pixels only 704 should be visible, the remaining 8 each side are overscan.
I dont know if there are overscan lines vertically
Currently HD is broadcast as 1440x1080 pixels
As before: For 16:9 images the pixels are stretched widthways by a third or interpolated (upscaled) to fit on a 1920x1080 display.
I dont know how many pixels or lines are overscan
It's only the box and display that decide whether they need an interlaced or progressive scan connection
Is that right? & anyone fill in the blanks?
SD is broadcast at 720x576 pixels, in largely 16x16 pixel blocks depending how the picture has changed from previous. As far as I know it doesnt know anything about interlacing
A number of control flags transmitted with the programme tell the display whether the image should be displayed 'as is' to give a 4:3 picture, or stretched widthways by a third to equivalent of 1024x576 a 16:9 picture or whether some intermediate such as 14:9 to show an original 4:3 image on a 16:9 display
Phew
However it's not quite as simple as that as of the 720 pixels only 704 should be visible, the remaining 8 each side are overscan.
I dont know if there are overscan lines vertically
Currently HD is broadcast as 1440x1080 pixels
As before: For 16:9 images the pixels are stretched widthways by a third or interpolated (upscaled) to fit on a 1920x1080 display.
I dont know how many pixels or lines are overscan
It's only the box and display that decide whether they need an interlaced or progressive scan connection
Is that right? & anyone fill in the blanks?


