‐Can be either NTSC or PAL CD‐ROM FORMATS
‐Not so popular anymore because of the web
‐Higher bandwidth than web video
‐Capable of DVD quality on fast computers
INTERNET FORMATS
‐Less bandwidth so every bit of data has to count
‐Web video can use either real‐time streaming mode or progressive‐download mode
‐Real‐time requires specialised streaming server software and are limited in quality by the bandwidth available between the server and the end user.
‐Progressive‐download files load from standard web servers, and may take a long time to download, but may also provide higher and more reliable video and audio quality.
MOBILE DEVICES
‐These devices have small screens and slow processors, even compared to a laptop computer, but the ability to play video back on extremely small and lightweight devices can have great value.
‐Most compressed video formats can be played on some mobile devices, including Adobe® Flash® Video, MPEG‐4, Microsoft® Windows Media, and RealMedia. Dedicated mobile formats, like Kinoma, are also available.
‐There are no universal formats or settings for mobile devices. Instead, content has to be optimized for a small class of devices or even a particular model. When the optimization is successful, the results can be great.
The Fundamentals
HUMAN SENSES
‐Limitations in our senses of sight and hearing make compression possible
‐Compression technologies take advantage of the strengths and weaknesses of human senses by reducing data that isn’t likely to be perceived.
