Information storage medium and information reproducing apparatus

摘要

There are provided an information storage medium, which is manufactured with high yield and is little influenced by a reproducing apparatus, and an information reproducing apparatus capable of performing stable information reproduction. The information storage medium has a pre-groove (1) with a groove-like, continuous projection-and-recess shape and a pre-pit (2) with an intermittent projection-and-recess shape. A level difference (depth or height) of the projection and recess of the pre-pit is substantially equal to that of the pre-groove. Each of the pre-pit and pre-groove has a recording surface wobbling along a predetermined curved line. A reproduction signal from the information storage medium having the recording surface can be obtained by at least one pair of a preamplifier and a digitizing circuit. <IMAGE>