In a tutorial video I watched, they said Interlace was also to lower the bandwidth but increase the perceived frame rate I believe. Normal TV bandwidth (SD) in its day was incapable of delivering full progressive frames due to bandwidth limitations. Splitting them was the best way to double the image without sacrificing the total lines viewed.
Neil. On 5 August 2011 17:58, Mike Boom <[email protected]> wrote: > ** > > > At 03:42 PM 8/4/2011, Gregg Eshelman wrote: > >The only reason for interlaced video is due to the technological > >limitations of the cameras and televisions in the early years of > television. > > > >Interlaced video could have been done away with not too long after > >the introduction of the transistor, but to maintain compatibility > >with the millions of old televisions already in use the interlaced > >format was kept. > > I don't think that's really the case. Interlacing is a technique for > effectively doubling the frame rate (using alternating fields instead > of frames) to reduce motion capture problems without doubling the > data stream. That's why it's still used today by cable and satellite > companies striving to keep channel bandwidths down, that's why HDV > uses it, and I suspect it's why Canon includes a 60i option on their > camcorders. > > Once we speed up the progressive frame rate past the human eye's > capability of discerning discrete frames (60p, I'd think) and don't > have to worry about the bandwidth, then I suspect interlace can go away. > > But when do we ever not have to worry about bandwidth? As soon as our > camcorders bump to up 4K resolution, suddenly bandwidth is an issue again. > > I suspect we haven't heard the last of interlacing for some time to come. > > Mike Boom > > > [Non-text portions of this message have been removed] ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Adobe-Premiere/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Adobe-Premiere/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
