Self-correcting record-play system and method

Claim 1

A transducer system comprising recording means for recording a signal with a given signal frequency component on a record medium, said recording means having a magnetic core defining a coupling region for coupling of the magnetic core with the record medium, and means coupled with said magnetic core for producing a pulse type recording field at said coupling region for recording a signal pulse on the record medium over a distance along the record medium which is small in relation to a recorded wavelength of the signal frequency component of the signal to be recorded, and playback means coupled with said record medium at said coupling region of said magnetic core and operative for reproducing each signal pulse immediately after recording thereof while the recorded signal pulse on the record medium remains in coupling relation with said magnetic core at said coupling region and prior to the recording of a next succeeding signal pulse at said coupling region, said recording means having means coupled with said playback means for producing a series of pulse type recording fields at said coupling region each based both on an instantaneous value of a signal to be recorded and on the amplitude of a previously recorded signal pulse as reproduced by said playback means such that a previously recorded signal pulse on the record medium can be corrected prior to leaving said coupling region.