Virtual channel table for a broadcast protocol and method of broadcasting and receiving broadcast signals using the same
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Accused Products
Abstract
A virtual channel table for broadcasting protocol and a method for broadcasting by using the virtual channel table includes identification information identifying and permitting discrimination of active and inactive channels contained in the virtual channel table. At a receiver, the virtual channel table transmitted from the transmitting side is parsed, thereby determining whether the current received channel is an active or inactive channel.
1 Citation
36 Claims
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1-30. -30. (canceled)
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31. A method of indicating an inactive channel in a digital broadcast transmitter, comprising:
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generating a virtual channel table, in which a program number field is set to zero to indicate that a corresponding virtual channel is an inactive channel; and transmitting the virtual channel table as part of a digital broadcast signal; wherein said inactive channel is a channel that is not presently carrying a broadcast program;
however, the same inactive channel is scheduled to carry a broadcast program at a predetermined later time from a broadcasting station without local viewer interaction; andwherein the inactive channel is capable of being automatically skipped. - View Dependent Claims (32, 33, 34, 35)
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36. A digital transmission apparatus, comprising:
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a program and system information protocol (PSIP) generator for generating a virtual channel table, in which a program number field is set to zero to indicate that a corresponding virtual channel is an inactive channel; and a transmitter for transmitting the virtual channel table as part of a digital broadcast signal;
wherein said inactive channel is a channel that is not presently carrying a broadcast program;
however, the same inactive channel is scheduled to carry a broadcast program at a predetermined later time from a broadcasting station without local viewer interaction; andwherein the inactive channel is capable of being automatically skipped.
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Specification