Data transmission device, data reception device, data transmission method, and data reception method

摘要

There is provided a data transmission device including a transmission unit which transmits, via a transmission path to a data reception device, video data received by the data transmission device and packetizes closed caption data which was received by the data transmission device and transmits the closed caption data packetized via the transmission path to the data reception device, where the transmission path is constituted by a transmission channel included in a High Definition Multimedia Interface (HDMI) cable.