US 6,807,143 B1 · Information-recording medium and information reproducing apparatus

Abstract

An information recording medium and an information reproduction apparatus that can substantially increase the capacity for recorded information. A preformat pit array 202 exists on the extension of the boundary between a concave portion 103 and a convex portion 104 and includes information on both sectors across the boundary. An adjustment pit array 201 precedes the preformat pit array 202 in the advancing direction of light that reproduces information recorded on an information recording medium. The information reproduction apparatus adjusts the amplifying rate so that the level of a signal from the adjustment pit array 201 becomes equal to a reference level required to reproduce the information correctly. The apparatus then uses this amplifying rate to correctly reproduce the information in the preformat pit array 202.

Claims30

Dependent claims

An information recording medium comprising:

a recording surface having adjacent recording tracks sandwiching a boundary therebetween;
a preformat pit array on an extension of the boundary between adjacent recording tracks on said recording surface, said preformat pit array containing information on both recording tracks sandwiching the boundary;
and
an adjustment pit region on said recording surface at a position prior to said preformat pit array relative to the advancing direction of light that reproduces recorded information from said recording surface, said adjustment pit region providing information for adjusting the signal level of a reproduced signal from said preformat pit array.

1 more element

An information recording medium comprising:

a recording surface having adjacent recording tracks sandwiching a boundary therebetween;
a preformat pit array on an extension of the boundary between adjacent recording tracks on said recording surface, said preformat pit array containing information on both recording tracks sandwiching the boundary;
and
an adjustment pit region on said recording surface at a position prior to said preformat pit array relative to the advancing direction of light that reproduces recorded information from said recording surface, said adjustment pit region formed on both the extension of the same boundary between adjacent tracks as said preformat pit array and the extension of an adjacent boundary, said adjustment pit region providing information for adjusting the signal level of a reproduced signal from said preformat pit array.

1 more element

Dependencies are inferred from the claim text.

Information-recording medium and information reproducing apparatus

Life of this patent

Information-recording medium and information reproducing apparatus

Life of this patent

Abstract

Claims30