In transmission of digital audio data usingIEEE1394, for example, when the audio
data is changed from linear PCM to nonlinear PCM, identifier adding means of the
transmitting apparatus inserts a silent identifier and nearly zero data for a specific
time, and first identifier distinguishing means of the receiving apparatus changes
over the output of data processing selecting means from linear PCM processing side
to nonlinear processing side when detecting the silent identifier, thereby preventing
generation of noise when changing over the data.
