Computer Science 1033A/B Lecture Notes - Lecture 2: Digital Media Player, Indeo, On2 Technologies

• School: Western University
• Department: Computer Science
• Course: Computer Science 1033A/B
• Professor: idk

Document Summary

Video: a sequence of still images that create the illusion of movement when played, movies = 24-30 fps, ntsc (tv) uses 29. 97 fps (used to be 30, but they decreased to accommodate for colour. Video information: before 1996, all tv used interlaced display: > pixels are distorted (rectangular) because 720:480 is a. Analog camcorder -> must convert to digital before put it on computer. Digital camcorder -> no converter needed (mostly used now) Does some compression inside the camcorder (dv25 is most common) Dv25: pixel = 720 x 480 (3:2), frame aspect = 4:3 or 16:9, data rate = 25 mb/sec, Frame rate = 29. 997, colour sampling = yuv 4:1:1: video use yuv (yiq) or ycbcr colour compression. Y -> brightness (luminance) uv (or cbcr) -> colour/hue (chrominance) Brightness is more important than colour (uv) will be compressed, but brightness (y) won"t be.