Patent ID: 8875217

Claim:
A receiver comprising: a demodulation unit for demodulating a channel-selected signal, outputting a first transport stream signal and a second transport stream signal, and determining a receiving quality and outputting it as a receiving quality information signal; a first delay generator for delaying the first transport stream signal by a first transmission time delay, and outputting the delayed first transport stream signal as a first delay transport stream signal; a second delay generator for delaying the second transport stream signal by a second transmission time delay and outputting the delayed second transport stream signal as a second delay transport stream signal; a first AV decoder for decoding the second delay transport stream signal and outputting a first video signal and a first audio signal decoded from the second delay transport stream; a second AV decoder for decoding the first delay transport stream signal and outputting a second video signal and a second audio signal decoded from the first delay transport stream; an video/audio switching unit for inputting of the first video signal and the first audio signal, and the second video signal and the second audio signal, selecting any of the first video signal and the first audio signal, and the second video signal and the second audio signal, and outputting a video signal and an audio signal based on the receiving quality information signal; a delay detector for inputting of the first audio signal and the second audio signal, detecting an amount of audio time delay between the first audio signal and the second audio signal, and outputting the amount of audio time delay as a delay amount signal; and a delay controller for receiving an input of the delay amount signal and controlling the first delay generator and the second delay generator based on the delay amount signal; wherein the delay controller stepwise increases the first transmission time delay to the first transport stream signal in the first delay generator or the second transmission time delay to the second transport stream signal in the second delay generator to reduce the amount of audio time delay between the first audio signal and the second audio signal.