Image transmitting apparatus, image transmission/reception system, and non-transitory computer readable medium

An image transmission/reception system comprising:

• an image receiving apparatus including:
• a reception circuit that extracts a clock signal from transmission data to obtain image data from the transmission data by using the extracted clock signal, the transmission data being transmitted from an image transmitting apparatus, and that, when extraction of a clock signal from the transmission data is ready, varies a lock signal from a first logic state to a second logic state, the lock signal indicating whether communication has been established, the first logic state indicating that the communication has not been established, the second logic state indicating that the communication has been established;
• and
• a lock-signal transmission controller that, when the lock signal which is output from the reception circuit varies from the second logic state to the first logic state, outputs, to the image transmitting apparatus, a signal as a lock signal, the output signal varying in a preset manner;
• and
• the image transmitting apparatus including:
• a transmission circuit that, when the lock signal which is input varies from the first logic state to the second logic state, transmits, to the image receiving apparatus, the transmission data in which a clock signal is superimposed on image data;
• and
• a lock-signal masking unit that receives the lock signal from the image receiving apparatus, and that, when the received lock signal varies in the preset manner, outputs a lock signal of the first logic state to the transmission circuit.