Patent ID: 6687308
Filing Date: 2004-02-03
Classification: H04H,H04N

Abstract:
A signal processing apparatus for converting a first digital broadcast having a prescribed transmission frequency on a first network, to a second digital broadcast signal having a prescribed frequency on a second network, characterized by comprising:first frequency-converting means for converting the frequency of the first digital broadcast signal, thereby to generate a first digital modulated signal; demodulating means for demodulating the first digital modulated signal supplied from the first frequency-converting means, thereby to generate digital broadcast data; table-detecting means for detecting a network information table which is physical information about a transmission path, from the digital broadcast data supplied from the demodulating means; table-changing means for changing at least transmission frequency data contained in the network information table detected by the table-detecting means, to data that complies with the second network; table-replacing means for replacing the network information table supplied from the demodulating means, with the network information table supplied from the table-changing means; display means for displaying the contents described in the network information table of the digital broadcast data supplied from the demodulating means and complying with the first network, and also the contents described in the network information table of the digital broadcast data changed by the table-changing means and complying with the second network; modulating means for modulating the digital broadcast data whose network information table has been replaced by the table-replacing means, thereby to generate a second digital modulated signal; and second frequency-converting means for converting the frequency of the second digital broadcast signal, thereby to generate the second digital broadcast signal.