Interactive video distribution systems – Operator interface – To facilitate tuning or selection of video signal
Reexamination Certificate
2008-05-20
2008-05-20
Kelley, Chris (Department: 2623)
Interactive video distribution systems
Operator interface
To facilitate tuning or selection of video signal
C725S039000, C725S038000, C725S037000
Reexamination Certificate
active
07376964
ABSTRACT:
A master guide table for a digital broadcast protocol, and a method of broadcasting and updating an electronic program guide using the table, uses identification information included in a bit stream syntax of the master guide table to classify whether contents of an event information table are merely shifted in time, or are actually changed. The master guide table is transmitted in accordance with a program and system information protocol (PSIP) for an advanced television system committee (ATSC) defined standard digital television broadcast protocol. A digital television receiver of a receiving party, or a digital cable broadcast receiver, can determine whether the contents of the event information table EIT are merely shifted in time or actually changed by parsing the identification information in the master guide table MGT. If the parsed contents of the identification information indicate that the event information table contents are merely shifted in time without any change, then a database maintaining previous event information table is not updated. Accordingly, time wasted in unnecessarily updating the database can be decreased.
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patent: 10224751 (1998-08-01), None
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Microsoft Press, Computer Dictionary, 3rdedition, p. 198.
“ATSC Standard: Program and System Information Protocol for Terrestrial Broadcast and Cable (Revision B),” Advanced Television Systems Committee, Doc. A/65B, Mar. 18, 2003.
“ATSC Standard: Program and System Information Protocol for Terrestrial Broadcast and Cable,” Advanced Television Systems Committee, Doc. A/65, Dec. 23, 1997.
Kelley Chris
LG Electronics Inc.
McKenna Long & Aldridge LLP
Raman Usha
LandOfFree
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