Information server and method of constructing a transport stream

摘要

An information server for outputting a carousel files from a transport stream and a method of constructing a transport stream from a carousel of files wherein data from the files is transformed through a protocol stack to transport stream packets and, for each file used in a transformation, a dependency link is stored indicating the transformed data resulting from the transformation and, for any transformed data used in a transformation to form further transformed data, a dependency link is stored indicating the further transformed data, such that, when a file in the carousel is changed, the dependency links indicate any transformed data requiring recalculation as a result of the change.