A method and associated apparatus for announcing and identifying metadata
relating to available video programs and/or enhancements in an enhanced
television communications system compliant with the standard set forth by
the Advanced Television Enhancement Forum (ATVEF). In particular, the
method provides for a new attribute to the existing Session Description
Protocol (SDP) announcement specified by the ATVEF standard which is used
by client receivers to access metadata. Metadata is data that describes
other data, in particular, that describe available video programs and/or
enhancements transmitted by a content creator and/or transport operator.
The new SDP announcement provides a Universally Unique Identifier (UUID)
to allow client receivers to identify the incoming metadata.
Additionally, the new SDP announcement further can provides the address
and/or port if the metadata is located on a network database. After
receiving this new SDP announcement, a client receiver can retrieve the
metadata and store it in its local memory. The client receiver may
present the metadata to the user to allow the user to select which one or
more television programs and/or enhancements to download and view or
merely to store for later use. Or, the client receiver may be
automatically programmed to receive the television program and/or
enhancement based on a specified criteria and information provided in the
metadata.