Digital broadcast signal distribution system and subscriber terminal
First Claim
1. A digital broadcast distribution signal distribution system comprising:
- two or more distribution centers, communicably connected to one another through a communication line, each of said distribution centers for distributing a digital broadcast distribution signal, which has been created based on program information received in each said distribution center, to subscribers through a CATV (Community Antenna Television) network, for sending the digital broadcast distribution signal to another of said distribution centers and for receiving a digital broadcast distribution signal from another of said distribution centers; and
subscriber terminals, each for receiving a digital broadcast distribution signal distributed from one of the distribution centers through the CATV network so that a subscriber views a program, each said distribution center including a signal replacement section for replacing the first-named digital broadcast distribution signal created based on the program information received in each said distribution center with the second-named digital broadcast distribution signal, which each said distribution center received from another of said distribution centers, and each of said subscriber terminals including a distribution plan storage for retaining channel distribution plans, one representing distribution setting information of the first-named digital broadcast distribution signal of each said distribution center, a distribution center discriminating section for discriminating the one distribution center that has created the third-named digital broadcast distribution signal, which is received in each said subscriber terminal, and a receiving section for changing, if the one distribution center is discriminated not to be a predetermined distribution center, NIT information of the third-named digital broadcast distribution signal based on the channel distribution plans of the one distribution center and the predetermined distribution center, and receiving the third-named digital broadcast distribution signal.
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Accused Products
Abstract
A digital broadcast signal distribution system includes subscriber terminals each of which includes a distribution plan storage for retaining channel distribution plans, one representing distribution setting information of each of the plural distribution centers; a distribution center discriminating section for discriminating the one distribution center that has created a digital broadcast distribution signal received in the subscriber terminal; and a receiving section for changing, if the one distribution center is discriminated not to be a predetermined distribution center, NIT information of the first-named digital broadcast distribution signal based on the channel distribution plans of the one distribution center and the predetermined distribution center, and receiving the digital broadcast distribution signal. Whereupon the system can always distribute a good digital broadcast distribution signal and can be constructed at a low cost.
83 Citations
30 Claims
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1. A digital broadcast distribution signal distribution system comprising:
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two or more distribution centers, communicably connected to one another through a communication line, each of said distribution centers for distributing a digital broadcast distribution signal, which has been created based on program information received in each said distribution center, to subscribers through a CATV (Community Antenna Television) network, for sending the digital broadcast distribution signal to another of said distribution centers and for receiving a digital broadcast distribution signal from another of said distribution centers; and
subscriber terminals, each for receiving a digital broadcast distribution signal distributed from one of the distribution centers through the CATV network so that a subscriber views a program, each said distribution center including a signal replacement section for replacing the first-named digital broadcast distribution signal created based on the program information received in each said distribution center with the second-named digital broadcast distribution signal, which each said distribution center received from another of said distribution centers, and each of said subscriber terminals including a distribution plan storage for retaining channel distribution plans, one representing distribution setting information of the first-named digital broadcast distribution signal of each said distribution center, a distribution center discriminating section for discriminating the one distribution center that has created the third-named digital broadcast distribution signal, which is received in each said subscriber terminal, and a receiving section for changing, if the one distribution center is discriminated not to be a predetermined distribution center, NIT information of the third-named digital broadcast distribution signal based on the channel distribution plans of the one distribution center and the predetermined distribution center, and receiving the third-named digital broadcast distribution signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A subscriber terminal for receiving a digital broadcast distribution signal from one of a plurality of distribution centers, each of which creates a digital broadcast distribution signal based on program information received from a provider, through a CATV (Community Antenna Television) network so that a subscriber views a program, said subscriber terminal comprising:
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a distribution plan storage for retaining channel distribution plans, one representing distribution setting information of each of the plural distribution centers;
a distribution center discriminating section for discriminating the one distribution center that has created the first-named digital broadcast distribution signal received in said subscriber terminal; and
a receiving section for changing, if the one distribution center is discriminated not to be a predetermined distribution center, NIT information of the first-named digital broadcast distribution signal based on the channel distribution plans of the one distribution center and the predetermined distribution center, and receiving the first-named digital broadcast distribution signal. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification