Hi,
I have an ordinary TV and lately a lot of Australian shows (such as “Home and Away”) have changed a lot… they used to have smooth video (it would have used fields at 50 fields per second) but now the picture is quite jerky.
I was wondering if it is because the picture is progressive (with 25 full frames per second) or if it still uses 2 fields (50 fields per second) but the shutter-speed is a lot faster (which makes the picture appear to “strobe”).
I could find out for myself if I captured some video and looked to see if there were fields but I can’t capture video at the moment. (I’m also working on a DV thing for TV) I think plasma TV’s are meant to be progressive or something, not interlaced, like normal TV’s, so they wouldn’t properly support fields like normal TV’s do. (They’d have to deinterlace the picture…)
I can’t work out what you’re talking about. Why do you say “I have an ordinary TV”, yet title the thread “digital TV” and then ask about plasma?
If you’re watching analog TV through an analog set, then nothing’s changed. How could it have?
Desmostylus:
Many shows are now filmed in a widescreen format using new digital video cameras… so that makes it at least possible that the picture will look a bit different - and me (and my sister) think the picture does look different.
I’ve had a look for the specifications of digital TV and found this:
http://www.dba.org.au/index.asp?sectionID=7#What_is_Standard_Definition_television
It seems that digital TV is either 50 frames per second interlaced - or progressive. (Not 25 progressive frames per second) So I guess the jerkiness is only due to the cameras having a faster shutter speed. (High shutter speeds are normally used in sports shows where there is a lot of movement but they don’t want things to blur)
Thanks anyway… I guess I worked it out myself.
Glad you’re happy, but your explanation makes no sense to me. Shrug. 