CONVERSION OF A MEDIA FILE INTO A SCALABLE FORMAT FOR PROGRESSIVE TRANSMISSION

摘要

The delivery of a single encoded video or audio file which can be played back over a network to various clients at different data rates, resolutions and quality levels, as individually determined by each client, is disclosed. An encoder inserts into the media file bitstreams 'layer signalling' information which delimits and identifies a number of different layers (for example, different 'significance/scale layers' and different 'region layers'). A media Server stores the media files, and can distribute to different networked clients bitstreams with different properties depending upon the layers which are requested by or are appropriate to each client.