Originally Posted by hawkeye3.1
Uses 1/2 the bandwith by segmenting the frame into a 48i stream. The display then reconstitutes it to the original 24p.
It's the same bandwidth. It's not like NTSC where the interlace is used to send two 60hz half bandwidth images to equal a 30hz image. In fact 24p of 24sF has a lower bandwidth than 60i or 60p. You can put 25% more material on a given storage system at 24p than at 60i or 60p. The 24sF signal is actually padded out to match 60i so system timing clocks remain the same
The sF was designed to maintain compatability with 60i systems. In the late 1990s the split between 1080i and 720p between the four top networks threatened to stall HD deployment for years. What was Hollywood who feeds all the networks to do? Install duplicate facilities foir 1080i and 720p on this new thing called HDTV many wall street folks were perdicting failure financially?
Laser Pacific Media Corporation who at the time was one of the sole production and mastering facilities involved with the studios for HD developed the 24sF format. This allowed 24P video to be processed by 1080i equipment with minimal modifications. Laser Pacific holds two engineering Emmy's for 24p developement.