Patent attributes
A data communication apparatus is provided, which is capable of properly transmitting and receiving data of low speed specifications such as MIDI data even via a transmission line of high speed specifications such as an IEEE 1394 serial bus, and hence capable of properly processing the data. The data communication apparatus transmits data to a data receiving apparatus having a data processing section that processes received data at a predetermined processing speed. Data to be transmitted is generated at a higher speed than the predetermined processing speed. The generated data is output at an output speed adjusted to the predetermined processing speed, and the output data is transmitted at a higher speed than the predetermined processing speed.