DATA TRANSMISSION APPARATUS, DATA TRANSMISSION METHOD, AND DATA RECORDING MEDIUM

摘要

A system control circuit (5) carries out data communications through an interface (14) to decide whether an external device connected to the interface (14) can store data or not. When the decision indicates the external device can store data, the system control circuit (5) turns a switch (13) off to stop the transmission of audio data to the external device through the interface (14). This effectively prevents unauthorized copying.