Patent ID: 7924817

Claim:
A digital TV broadcast receiving apparatus that is connected to an external digital TV broadcast receiving apparatus, said digital TV broadcast receiving apparatus comprising: a tuner unit configured to receive a digital TV broadcast signal, demodulate a signal of a modulation frequency including a selected first channel, and output a first transport stream; a display unit; a storage unit a display control unit configured to display video data of the first channel, which is included in the first transport stream output by said tuner unit, on the display unit; an operation unit configured to receive an instruction for selecting a second channel so as to store data of the second channel in the storage unit while video data of the first channel is displayed on the display unit; a determination unit configured to determine whether or not the modulation frequency includes the second channel instructed through said operation unit; an external interface control unit configured to, when said determining unit determines that the modulation frequency does not include the second channel, acquire a Network Information Table (NIT) from the external digital TV broadcast receiving apparatus, determine whether or not the external digital TV broadcast receiving apparatus can receive the second channel by analyzing the acquired NIT, and control the external digital TV broadcast receiving apparatus to output a second transport stream including video data of the second channel if it is determined that the external digital TV broadcast receiving apparatus can receive the second channel; and a recording unit configured to store, into said storage unit, video data of the second channel that is included in the first transport stream output from said tuner unit when said determining unit determines that the modulation frequency includes the second channel, and to store, into said storage unit, the video data of the second channel included in the second transport stream output from the external digital TV broadcast receiving apparatus when said determining unit determines that the modulation frequency does not include the second channel, and the external digital TV broadcast receiving apparatus can receive the second channel, wherein the display control unit keeps displaying the video data of the first channel on the display unit while the recording unit is storing the video data of the second channel, and if it is determined by the external interface control unit that the external digital TV broadcast receiving apparatus can not receive the second channel, the display control unit displays a message indicating the same.