Computer Science 1033A/B Lecture 10: Week 10 - Video

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

Document Summary

Video: a sequence of still images that create the illusion of movement when played in succession, measured in fps (frames per second) Digital video each frame is a bitmapped graphic, stored as 0s and 1s. Instead of rgb, the yuv (yiq) or ycbcr model are used. Reduced from 12 samples to 8, 33% reduction in storage. 2 samples of either u or v, 1 scan line of u, then 1 scan line of v. Regular analog tv broadcasting began in the usa in 1939 using the ntsc standard. Ntsc frame rate was originally 30 fps, but went down to 29. 97 fps to accommodate for colour information. Experiments with hd tv began in the late 40s and 50s, but wasn"t adopted until 1996. Before 1996 all tv was broadcast using interlaced display and fields. Standard frame size is 720 x 480 pixels, with a frame aspect ratio of 4:3.