On Fri, 29 Apr 2016 20:42:06 +0100, Christopher Woods wrote: > "Upscaling" is a misnomer in this context. That implies a change of > picture resolution, ...
Agreed. > ... when there's no resizing going on. Not convinced. > 25 interlaced frames per second yields 50 interlaced fields per second > (due to odd and even line scanning), But does a frame have the same number of lines as a field? It doesn't in the analog world. 625 line frame, comprising two 312.5 line fields. Frame rate 25 per second, field rate 50 per second but half the vertical resolution. If a digital field only has half the vertical resolution, which I think it must have or you can't interlace them, then to create true 50 *frames* per second each field needs to be upscaled and the missing lines interpolated from the existing ones. If you just construct a frame from the two fields you have to repeat that frame or playback at double speed... I missing something but don't know what. -- Cheers Dave. _______________________________________________ get_iplayer mailing list [email protected] http://lists.infradead.org/mailman/listinfo/get_iplayer
