Streaming Media - Streaming media allows the user to watch and/or listen to a media file without it having first been fully downloading to the user's equipment.  A “player “ and/or “browser” is most often necessary to view and/or listen to the file. Typically the streamed file is compressed before it’s sent to the user and decompressed by the user’s player/software for listening and/or viewing. Importantly, typically the received file must be decompressed by the particular media player/software that's specified for that file.
http://etvcookbook.org/pc_dinners/streaming.html http://en.wikipedia.org/wiki/Streaming_Media