Method for producing scalable compressed video stream in computer system, involves combining base output stream coded with second quality value with base output stream coded with third quality value for certain quality parameter

摘要

The method involves providing a compressed input video stream (118) which is coded with a first value for certain quality parameter. The compressed input video stream is transcoded to base output stream and enhancement signal. The base output stream coded with a second quality value for certain quality parameter is combined with base output stream coded with third quality value for certain quality parameter, where the second value is lower quality than first value for certain quality parameter and third value is of high quality than second value for certain quality parameter. An independent claim is included for a device for producing scalable compressed video stream.