You need to learn what interlacing is, and how it works.
right...
The studio footage is shot at 50 frames per second.
really 50 frames? I'd say 25 frames, 50 fields Interlacing is used to save bandwidth.
yep Why do you think it looks so much smoother when watching it on BBC HD? It has nothing to do with post processing like the "100Hz" modes on some TVs.
those are created to suck money from your pocket, some now come with 600Hz :lol: Turn it off and see for yourself.
Your TV has built in deinterlacing that switches between "film" and "video" mode automatically.
my TV does not deinterlace, there is no need for deinterlacing with cathode ray tubes
Video = 50 frames per second, stored using interlacing (as 50 fields).
50 frames or 50 fields, make up your mind. Theres a huge difference, one frame consists of two fields. The downside of using this method is that the resolution will decrease when there is motion in the scene. That is why 720p50 is better for TV broadcast. You get 50 frames at "full" resolution.
Film = 25 frames per second, stored using interlacing, but they can be restored to full resolution when the two fields in each frame are combined.
Top Gear uses both of these methods. The studio footage is 50 fps,
I thought you said 50 fields per second, that'd be 25fps (frames per second). and the films are shot at 25 fps. You can clearly see the difference when watching it on BBD HD.
This is how interlacing works:
One interlaced frame:
Two deinterlaced frames:
As you can see, the two deinterlaced frames contain different information. If you display the frame without deinterlacing, you will get the infamous combing effect. If you deinterlace the two fields to 25 fps, the resulting frame will be a combination of the two. Proper deinterlacing like the example above will result in 50p video.
You cannot turn 50 fields per second into 50 frames per second without making up half the information in those 50 frames. As you say yourself, a field only has half the vertical resolution. The vertical resolution of the two resulting frames is 1920x540
wouldn't 1920 (or 1440) be the horizontal resolution? (or 1440x540 on broadcasts like the ones on BBC HD).