Signal recording and reproducing apparatus for an opto-magnetic disk

A signal recording and reproducing apparatus for use with an opto-magnetic disk comprising:

• an opto-magnetic disk having a large number of concentric recording tracks on which the information signals are recorded;
• a head unit for recording signals on said disk or reproducing recorded signals therefrom;
• recording means for supplying recording signals or erasing signals to said head unit;
• reproducing means for reproducing signals read by said head unit;
• and
• control means operable so that, in the case of recording information signals on said disk, said recording means are caused to consecutively sweep a given track on said disk at least twice within a time interval required for reproducing said track and so that said head unit is switched between a first sweeping time and a second sweeping time in such a manner that said recording means will supply erasing signals to said head unit during said first sweeping time and time-base-compressed recording signals thereto during said second sweeping time, said control means controlling said track jumping means to cause said head unit to jump tracks so as to move said head unit between adjacent tracks which have been recorded on said disk.