History
Initially the digital media file type known as jpeg was the first visual media to render a progressive visual display as the digital media was downloaded and actually referred to as a progressive download. The distinction between the technical behavior of progressive download as opposed to the common or commercial use of the term progressive download to describe that behavior was not documented and there is a good deal of question regarding the origin of the term versus the origin of the technical implementation. Apple in reference to their QuickTime media player employed the term Fast Start in 1997, to describe what was commercially referred to as progressive download playback of encoded digital media content.
This fast start playback is the result of moving the meta data from the end of the digital media file to the front, this move of the meta data gave the media player all the information it required to begin playback as the file was still being downloaded. Prior to that change, the meta data summary was located at the end of a digital media file and the entire file would need to be downloaded in order for the meta data to be read and the player begin play back.
Read more about this topic: Progressive Download
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