Image transmission and reception system, non-transitory computer readable medium storing program, and image transmission and reception method

A non-transitory computer readable medium storing a program for causing a computer to execute a process, the process comprising:

• in an image reception apparatus including a receiving circuit that extracts a clock signal from transmission data transmitted from an image transmission apparatus, acquires image data from the transmission data by using the extracted clock signal, and in a case where the clock signal is extractable from the transmission data, changes a lock signal, which indicates whether or not communication is established, from a first logical state indicating that the communication is not established to a second logical state indicating that the communication is established, adding error detection information calculated by using code information, which includes information on a logical state of the lock signal output from the receiving circuit and notification information other than the logical state of the lock signal, to the code information, and outputting the code information with the error detection information as serial data to the image transmission apparatus;
• and
• in the image transmission apparatus including a transmission circuit that transmits the transmission data in which the clock signal is superimposed on the image data to the image reception apparatus in a case where an input lock signal changes from the first logical state to the second logical state, an image transmission control unit that controls transmission of the image data to the image reception apparatus via the transmission circuit, receiving the serial data transmitted from the image reception apparatus, outputting notification information corresponding to the code information included in the received serial data to the image transmission control unit in a case where there is no inconsistency between the code information and the error detection information included in the received serial data, and outputting the lock signal in the logical state indicated by the code information to the transmission circuit.

An image transmission and reception method comprising:

• in an image reception apparatus including a receiving circuit that extracts a clock signal from transmission data transmitted from an image transmission apparatus, acquires image data from the transmission data by using the extracted clock signal, and in a case where the clock signal is extractable from the transmission data, changes a lock signal, which indicates whether or not communication is established, from a first logical state indicating that the communication is not established to a second logical state indicating that the communication is established, adding error detection information calculated by using code information, which includes information on a logical state of the lock signal output from the receiving circuit and notification information other than the logical state of the lock signal, to the code information, and outputting the code information with the error detection information as serial data to the image transmission apparatus;
• and
• in the image transmission apparatus including a transmission circuit that transmits the transmission data in which the clock signal is superimposed on the image data to the image reception apparatus in a case where an input lock signal changes from the first logical state to the second logical state, an image transmission control unit that controls transmission of the image data to the image reception apparatus via the transmission circuit, receiving the serial data transmitted from the image reception apparatus, outputting notification information corresponding to the code information included in the received serial data to the image transmission control unit in a case where there is no inconsistency between the code information and the error detection information included in the received serial data, and outputting the lock signal in the logical state indicated by the code information to the transmission circuit.