| ||||||||||
|
I'm not sure that wide screen stretch mode format for SD was ever
common in the USA? Anyways - all digital broadcast SD is delivered 'non-square' due to a decision way back to use a common line sample of 720 for both 'PAL' and 'NTSC'. In fact it works out a bit more complicated in that the digital 720 samples occupy a little more than the active line period in analog, approx 712 in NTSC and 702 in PAL actually represent that period. PAL is sometimes broadcast as 704x576 being the next lowest sample divisible by 16. Camera manufacturers gradually increased the active line periods to cover the whole 720 samples. It is all a glorious mess and pretty much any possible aspect ratio has probably been used at some time! To the chase - 4:3 and 16:9 both occupy the same nominal 720 samples here in UK (and AFAIK the rest of Europe) . The only difference is that the 16:9 has a 'flag' which tells the display device to stretch the picture wider to fill a wide screen. In other words they are both non-square or anamorphic but the wide screen is more extreme. Hope this helps a tiny bit! Perry Mitchell Engineer Farnham, Surrey On 05/03/2013 04:14, jarret langmeire wrote: Ok, it seems that last one did the trick. Now I'm wondering how I should have known that based on their spec sheet - does the line "CCIR Pixel Aspect - PAL CCIR 720 x 576 non-squared" (from their spec sheet) make this clear, ie. that I need to output a D1/DV PAL (1.09 pixel aspect ratio) project as opposed to a 1.46 project? |
