DATA TRANSMISSION/RECEPTION SYSTEM, DATA RELAY DEVICE, DATA RECEPTION DEVICE, DATA RELAY METHOD, AND DATA RECEPTION METHOD

摘要

It is possible to realize a bidirectional data transmission between two devices in an AV system connected by HDMI at a low cost.An audio amplifier as an HDMI source is connected to a display device as an HDMI sync also by an auxiliary transmission path such as IEEE 1394, so that transmission of data received by a display device (3) via the HDMI from other device to an audio amplifier (2) is performed by using the auxiliary transmission path. The display device (3) generates CTS by a clock regenerated by ACR and TMDS clock received by the HDMI path from the audio amplifier (2) and transmits it together with a division ratio value N via the auxiliary transmission path. The audio amplifier generates a clock for an audio signal from the received CTS and N.