Patent ID: 8786779

Claim:
A signal processing apparatus connectable to a display apparatus and connectable to a plurality of input source devices, the signal processing apparatus having an audio processing unit, and comprising: a selection unit configured to select an input source device from the plurality of input source devices connected to the signal processing apparatus in accordance with a user's selecting instruction in a case where the plurality of input source devices are connected to the signal processing apparatus; a transmission unit configured to transmit a device type of the selected input source device to the display apparatus; a receiving unit configured to receive, from the display apparatus, information concerning delay time for displaying a video based on a video signal output from the selected input source device, the delay time being set according to the device type of the selected input source device; a delay unit configured to delay an audio signal input from the selected input source device based on the information received by the receiving unit; and an output unit configured to output the audio signal delayed by the delay unit, wherein the selection unit is configured to automatically select a connected input device in response to the power of the signal processing apparatus being turned on in a case where only one input source device is connected to the signal processing apparatus.