system spatial resolution frame rate mbps
NTSC704 x 480 30 243 mbps
PAL/SECAM 720 x 576 25 249 mbps

item streaming downloaded
bandwidth equal to the display rate may be arbitrarily small
disk storage none the entire file must be stored
startup delay almost none equal to the download time
resolution depends on available bandwidth depends on available disk storage

formats


Quicktime, introduced by Apple, early 1990s, for local viewing; RealVideo, streaming video from RealNetworks; and Windows Media, a proprietary encoding scheme fromMicrosoft.

Examples of these formats, encoded for various bitrates are available at Video at VU.