METHOD AND DEVICE FOR STREAM ADAPTATION

摘要

A stream adaptation device and method of adapting source data streams to the attainable transmission rate of a bandwidth-limited channel such as a Digital Subscriber Line (DSL). A plurality of transcoding units each receive a source stream at a given rate and transcode the stream into a plurality of transcoded streams of lower transmission rates. A polling unit retrieves the current quality of the DSL line from an IPDSLAM to which the DSL line is connected. A controller calculates the rates to be used on the DSL line for the different source streams. A selector then selects a combination of an original source stream and/or transcoded streams of lesser rates that fits the quality of the DSL line. A multiplexer combines the selected source streams and/or transcoded streams onto the DSL line.