A digital signal recording/reproducing apparatus having a mode for recording a
compressed input signal on a recording medium and a mode for recording a non-compressed
input signal on the recording medium. The apparatus include input circuits which
input a digital compressed signal and an analog non-compressed signal, an A/D converter,
a data compressor, a mode change-over circuit which changes-over the mode, and
a selector which selects either a digital compressed signal from the data compressor
or a digital compressed signal from the input circuit. A recorder records a recording
signal to a recording medium and a reproducer.