Glossary?

GrizzlyIke wrote on 4/15/2003, 8:04 AM
This forum needs its own glossary that automatically updates itself each month!! I've been participating in this forum for over a year and suddenly "24p" becomes a hot topic. What is "24p" and should us hobbyists even care? While were at it, can anyone define "60i" (someone threw that into a "24p" discussion), "frameserver", and "rotoscoping"? I am sure there are other names, abbreviations and acronyms that could stand defining. Thanks for your help.
Grizzly Ike

Comments

Former user wrote on 4/15/2003, 8:16 AM
24p= 24 frames per second/progressive
60i= 60 fields per second/interlaced

A hobbyist might not need to worry. Normal NTSC TV is 30 frames per second, with each frame containing 2 fields. The fields are Interlaced, meaning that first one field is drawn and then the second field is drawn. This makes 60 fields per second. A progressive signal is more akin to a computer screen, with the whole frame being drawn at one time. No fields so there is less chance of blurring caused by the time delay between fields. There are new professional and prosumer video cameras shooting at progressive. But the normal camcorder and TV are interlaced. 24 frames per second has been the speed that feature films have been shot at.

Frameserver is the process of feeding a frame at a time to another application, such as an MPEG encoder. This replaces a plug in and allows interaction between seperate applications.

Rotoscoping is the process of enhancing a film or video one frame at a time, by adding either animation, effects or other features.

HTH
GrizzlyIke wrote on 4/16/2003, 6:55 AM
Great answers DaveT2. Already I've learned something new today. Thanks for the great reply and for taking the time to respond.
Grizzly Ike
Bear wrote on 4/16/2003, 9:34 AM
Ok Grizzly how did you get your nickname? they call me Bear cause I used to hunt Bear with a 44 mag handgun and some thought that was nuts :-) I have taken both Bear and Moose with handgun.

Bear
MarkWWW wrote on 4/18/2003, 1:17 PM
A useful starting point for many of these definitions might be Quantel's "Digital Fact Book", a free glossary covering most of the terms you'll find bandied around hereabouts.

A dowloadable version can be found at http://www.quantel.com/dfb
DavidPJ wrote on 4/18/2003, 2:16 PM
Thanks Mark. Nice reference document.