Patent ID: 7263713
Filing Date: 2007-08-28
Classification: H04H,H04N

Abstract:
1. A receiver apparatus comprising: means for receiving a first signal from a first satellite; means for receiving a second signal from a second satellite, wherein the first signal and the second signal have undergone conversion of modulation format to have a narrower bandwidth, and one of the first and second narrowed bandwidth signals has been frequency-shifted into a frequency band between VHF low band and VHF high band and the other of the first and second narrowed bandwidth signal has been frequency shifted into a vacant frequency band; means for demodulating the first and second signals in accordance with corresponding modulation formats after conversion; means for decoding the output from said demodulating means to obtain video signals and audio signals; and means for storing a frequency conversion table containing correlation information between respective carrier wave frequencies for the first and second signals before frequency shifting and frequencies of corresponding frequency-shifted signals, said frequency conversion table being created based on network information table (NIT) information included in the first and second signals and information regarding the frequencies of the received signals, the NIT including a service list descriptor that includes information regarding channel information for each carrier wave frequency; means for receiving a command to display content corresponding to a channel number, said NIT including information indicating that said channel number corresponds to said carrier wave frequency for one of said first and second signals; and means for accessing the frequency conversion table, obtaining the frequency shifted signal that corresponds to the carrier wave indicated by the channel number, and tuning to the corresponding frequency-shifted signal so that the content corresponds to the channel number originally assigned to the carrier wave frequency in the NIT.