Abstract: A CD-R recorder capable of recording a digitized audio signal or the like on a CD-R so as to permit realtime monitoring of the recording. Successive segments of the digitized input signal are stored, one at a time, on an input buffer memory, from which each signal segment is read out in time compression mode and recorded on the CD-R. The successive signal segments are therefore recorded at prescribed time intervals. Each recorded signal segment on the disk is then immediately recovered there-from during the time interval between the end of recording of this segment and the beginning of that of the next segment. After being stored on an output buffer memory, the recovered signal segment is immediately read out therefrom in time extension mode, such that the successive segments of the digital signal are read out as a streamlined continuum, an exact replica of the input signal, to enable realtime monitoring of the recording being made on the disk.

Abstract: A high speed dubbing is to be realized with two recording and/or reproducing units for compressed data. To this end, a magneto-optical disc 32 is read by an optical head 33 and compressed data produced via a decoder 41 are delivered to a memory 14 via a switch 37. The data are then delivered to a magnetic head driving circuit 16 via an encoder 15 for direct writing on a magneto-optical disc 2. In this manner, compressed data are directly dubbed without expansion to realize high speed dubbing.