Signal recording and reproducing method and signal recording and reproducing unit

A signal recording and reproducing unit for recording a series of signals on a tape-like storage medium running, for reproducing said series of signals recorded on said tape-like storage medium and for erasing said series of signals recorded on the tape-like storage medium, comprising:

• a rotating drum;
• recording means for forming a recording track on said tape-like storage medium running and for recording said series of signals on the track, said recording means including a recording head provided on said rotating drum;
• erasing means for erasing a series of signals recorded on a recording track preceding said recording track formed by said recording means, said erasing means including an erasing head provided on said rotating drum;
• reproducing means for reproducing a series of signals recorded on a recording track preceding the recording rack erased by said erasing means, said reproducing means including a reproducing head provided on said rotating drum;
• and
• control means for controlling recording operation of said recording means, erasing operation of said erasing means and reproducing operation of said reproducing means to respectively perform at least one recording operation, at least one erasing operation and at least one reproducing operation for each rotation of said drum, such that no recording and no erasing are performed at the same time that reproducing is performed.