Interactive video distribution systems – Video distribution system with upstream communication – Receiver
Reexamination Certificate
2008-07-29
2008-07-29
Vu, Ngoc K (Department: 2623)
Interactive video distribution systems
Video distribution system with upstream communication
Receiver
C725S131000, C725S151000, C725S152000
Reexamination Certificate
active
07406706
ABSTRACT:
A method and system for efficiently allowing a controller device to receive information from a tuner device regarding the content of a digital television bit-stream. The present invention first receives a digital television bit-stream at a tuner device. The digital television bit-stream comprises video, audio, and data information, as well as tables that describe the content of the bit-stream. Next, to obtain a table, a controller device sets a value specifying a desired table in an attribute field of a command. Next, the controller sets at least one flag in a flag field of the command. The setting of the flag indicates the table which is being requested. Additionally, because a single attribute field may hold different types of information, the flags indicate which type of information is in the attribute field for this issuance of the command. The controller, then issues the command to the tuner, which determines what table is being requested, based upon the flags set. The tuner then returns that table to the controller.
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“Program and System Information Protocol for Terrestrial Broadcast and Cable”; Advanced Television Systems Committee; Doc. A/65; Dec. 23, 1997; 93 pages.
Sony Corporation
Sony Electronics Inc.
Vu Ngoc K
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