Patent ID: 8441576

Claim:
A receiving device, comprising: a signal receiving unit configured to receive a video signal and an audio signal via a transport channel from an external apparatus; a delay-information receiving unit configured to receive, from the external apparatus via the transport channel, delay information indicating the delay time (T 4 a ) of the audio signal received by the signal receiving unit with respect to the video signal received by the signal receiving unit; an image display unit configured to process the video signal received by the signal receiving unit to display an image; an audio output unit configured to process the audio signal received by the signal receiving unit to output an audio; a storage unit configured to store video delay information indicating a delay time (T 2 v ) lasting until the image responsive to the video signal received by the signal receiving unit is displayed on the image display unit and audio delay information indicating a delay time (T 2 c ) lasting until the audio responsive to the audio signal received by the signal receiving unit is outputted by the audio output unit; an audio-signal transmitting unit configured to transmit the audio signal received by the signal receiving unit to another external apparatus different from the external apparatus via another transport channel different from the transport channel; a computing unit configured to compute a delay time (T 2 a ′) of the image displayed on the image display unit with respect to the audio signal to be transmitted from the audio-signal transmitting unit, wherein the computing device computes the delay time (T 2 a ′) using the equation: T 2 a′=T 2 v−T 4 a−T 2 c ; and a delay-information transmitting unit configured to transmit, to the other external apparatus, delay information indicating the delay time (T 2 a ′) obtained by the computing unit.