Video data transmission/reception method and apparatus therefor

A source device to establish a connection with a sink device, the source device comprising:

• a transmitter for transmitting and receiving data;
• a control unit for controlling the transmitter;
• and
• at least one computer memory operably connectable to the control unit and storing instructions for performing operations when executed by the enemy control unit,
• wherein the operations include:
• receiving, from the sink device, first capability information of the sink device related to a specific operation;
• transmitting, to the sink device, support version information on a version of capability information of the sink device readable by the source device;
• and
• receiving, from the sink device, second capability information of the sink device related to the specific operation based on the support version information,
• wherein a version of the second capability information is configured based on the support version information.