VIDEO SIGNAL TRANSMISSION APPARATUS, IDENTIFICATION INFORMATION ACQUISITION METHOD FOR VIDEO SIGNAL TRANSMISSION SYSTEM AND COMPUTER READABLE MEDIUM STORING IDENTIFICATION INFORMATION ACQUISITION PROGRAM FOR VIDEO SIGNAL TRANSMISSION SYSTEM

The present invention provides a video signal transmission apparatus including: an optical transmitter that uni-directionally transmits video data from a video source; an optical receiver that receives the video data and outputs the received video data to a sink device; a first transmission medium that transmits the video data at a high speed; a second transmission medium that transmits identification information for identifying the sink device at a low speed; an identification information acquisition control section that acquires the identification information from the sink device; a storage section that stores general-purpose identification information used for plural types of sink devices; a acquisition possibility determination section that determines whether the identification information can be acquired from the sink device; and a general-purpose identification information reply control section that replies the stored general-purpose identification information to the video source device if determined that the identification information cannot be acquired.