Patent ID: 6798463
Filing Date: 2004-09-28
Classification: H04N

Abstract:
A television receiving apparatus capable of receiving signals of a desired frequency in correspondence to a first channel plan having predetermined channel frequencies assigned, and a second channel plan containing the channel frequencies assigned to said first channel plan and having other channel frequencies assigned in the frequency bands not assigned to said first channel plan,said television receiving apparatus comprising: channel number counting means for counting up the number of station present channels in the channel plan to which a station belongs, if it is judged that the channel frequency of said station is within a fixed frequency range from a center frequency, wherein said channel plan is ground wave broadcasting, and said second channel plan is cable television broadcasting, wherein said channel number counting means stores the error data off a center frequency in a memory, if it is determined that the channel frequency of a station that is judged to be present is outside a fixed frequency range from the center frequency, for all the stations which are judged that station is present, wherein the error data first stored in said memory is set as the reference error data, the error data stored subsequently is set as the comparative error data, and the comparative error data is compared in succession with the reference error data in such a way that if the comparative error data is within the fixed frequency range from the reference error data, the comparative error data is judged to be contained within the same group, and the coincidence number is counted up as being contained within the same group, or if the comparative error data is outside the fixed frequency range from the reference error data, a check is made whether or not the next reference error data has been already registered, and the comparative error data is registered as the next reference error data, when the next reference error data has not been registered, until the comparison for all the error data is completed, in which the coincidence number is counted up for one group, and then the next reference error data registered ahead and the error data stored subsequently as the comparative error data are compared in the same way as previously, the coincident number is counted up for another one group until there is no next reference error data registered, and wherein the coincident number for the largest group among the thus obtained groups is added and counted up to the number of station present channels for said second channel plan.