RECORDING MEDIUM HAVING TRACK FORMED OF LAND PORTION AND GROOVE PORTION, AND REPRODUCING APPARATUS THEREFOR

摘要

AN OPTICAL REPRODUCING APPARATUS ACOORDING TO THE PRESENT INVENTION INCLUDES A LAND/GROOVE SWITCHING CIRCUIT FOR ALTERNATELY SWITCHING REPRADUCTION OF A RECORD MARK ON A GROOVE PORTION (G) AND A LAND PORTION (L). THIS ALLOWS A TRACKING OPERATION TO BE CARRIED OUT CONTINUOUSLY AT A CONNECTION POINT TO A SUBSEQUENT TRACK IN THE RECORDING DIRECTION WITHOUT A LASER BEAM FROM AN OPTICAL PICKUP (2) PASSING THROUGH AN END OF A SPIRAL TRACK. A RECORDING MEDIUM (1) ACCORDING TO THE PRESENT INVENTION INCLUDES A RECORDING TRACK FORMED OF A GROOVE PORTION (G) AND A LAND PORTION (L), AND A RECORD MARK USED FOR SWITCHING A TRACKING OPERATION SO THAT A LIGHT BEAM EMITTED FROM THE OPTICAL PICKUP (2) SHOULD BE IRRADIATED ALTERNATELY ON THE GROOVE PORTION (G) AND THE LAND PORTION (L). WHEN THE RECORD MARK IS DETECTED, A TRACK JUMP OPERATION IS CARRIED OUT, AND INFORMATION IS REPRADUCED FROM THE GROOVE PORTION (G) AND THE LAND PORTION (L) ALTERNATELY.FIGURE 6