Television – Two-way video and voice communication – User positioning
Patent
1996-08-13
1998-12-01
Casler, Brian
Television
Two-way video and voice communication
User positioning
386 83, H04N 7173
Patent
active
058445951
ABSTRACT:
A decoding method minimizes the use of incorrect program specific information (PSI) parameters across program boundaries and provides default video and audio outputs for reproduction during error conditions. Program representative packetized datastreams incorporating PSI suitable for use in recovering data content of the program are decoded. PSI packets in the datastream are identified and a parameter within the identified PSI data is used to determine whether the identified PSI data is to be used for decoding the program content, irrespective of previous PSI content. Current PSI is updated with the identified PSI data in response to the parameter. Program content packets are identified using the current PSI. The program content packets are assembled into a decoded datastream using the current PSI. The current PSI may also updated with the identified PSI data irrespective of the content of the identified PSI data, provided that there is an absence of a PSI content error indication. Also packets representing default program content are assembled into the output datastream, in response to a PSI validity indication provided by a control parameter in the packetized datastream.
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Blatter Harold
Bridgewater Kevin Elliott
Deiss Michael Scott
Horlander Thomas Edward
Burke Alexander J.
Casler Brian
Din Luanne P.
Kurdyla Ronald H.
Thomson Consumer Electronics Inc.
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