Recording medium, address recording method and apparatus, and recording/reproducing method and apparatus for reducing crosstalk of addressing signals

An address recording method for reducing crosstalk between addressing signals of adjacent tracks of a disk-shaped recording medium, said address recording method comprising the steps of:

• laying out a plurality of grooves on a disk-shaped recording medium, said grooves alternating with a plurality of lands wherein one of said plurality of lands and said plurality of grooves includes a plurality of tracks, and the other includes a plurality of non-recording areas, said plurality of tracks being configured to have data recorded thereon or reproduced therefrom;
• and
• wobbling an edge of a groove adjacent to a land in accordance with address information of a track, said track on one of said groove and said land,
• wherein said step of laying out lays out said plurality of grooves such that said plurality of lands and said plurality of grooves have a track pitch in a range of 0.85 to 0.90 microns, said track pitch being a distance between centerlines of adjacent tracks.

An address recording apparatus for reducing crosstalk between addressing signals of adjacent tracks on a disk-shaped recording medium, said address recording apparatus comprising:

• means for laying out a plurality of grooves on a disk-shaped recording medium, said grooves alternating with a plurality of lands wherein one of said plurality of lands and said plurality of grooves includes a plurality of tracks, and the other includes a plurality of non-recording areas, said plurality of tracks being configured to have data recorded thereon or reproduced therefrom;
• and
• means for wobbling an edge of a groove adjacent to a land in accordance with address information of a track, said track on one of said groove and said land,
• wherein said means for laying out lays out said plurality of grooves such that said plurality of lands and said plurality of grooves have a track pitch in a range of 0.85 to 0.90 microns, said track pitch being a distance between centerlines of adjacent tracks.

A recording/reproducing method for recording data onto or reproducing data from a disk-shaped recording medium having a plurality of lands and a plurality of grooves laid out alternately with said plurality of lands, wherein one of said plurality of lands and said plurality of grooves includes a plurality of tracks, and the other includes a plurality of non-recording areas, said plurality of tracks being configured to have data recorded thereon or reproduced therefrom, wherein an edge of a groove adjacent to a land is wobbled in accordance with address information of a track, said track on one of said groove and said land, said recording/reproducing method comprising the steps of:

• radiating a first beam for recording data on or reproducing data from a track on a disk-shaped recording medium, and radiating a second beam on an edge of a non-recording area adjacent to said track by focusing said second beam on said non-recording area such that said second beam hits only a desired edge of a plurality of edges on said recording medium having a track pitch in a range of 0.85 to 0.90 microns, said track pitch being a distance between centerlines of adjacent tracks;
• detecting a reflected light of said second beam reflected from said recording medium;
• and
• computing from said reflected light an address of a location hit by said first radiated beam.

A recording/reproducing apparatus for recording data onto or reproducing data from a disk-shaped recording medium having a plurality of lands and a plurality of grooves laid out alternately with said plurality of lands, wherein one of said plurality of lands and said plurality of grooves includes a plurality of tracks, and the other includes a plurality of non-recording areas, said plurality of tracks being configured to have data recorded thereon or reproduced therefrom, wherein an edge of a groove adjacent to a land is wobbled in accordance with address information of a track, said track on one of said groove and said land, said recording/reproducing apparatus comprising:

• means for radiating a first beam for recording data on or reproducing data from a track on a disk-shaped recording medium, and radiating a second beam on an edge of a non-recording area adjacent to said track by focusing said second beam on said non-recording area such that said second beam hits only a desired edge of a plurality of edges on said recording medium having a track pitch in a range of 0.85 to 0.90 microns, said track pitch being a distance between centerlines of adjacent tracks;
• means for detecting a reflected light of said second beam reflected from said recording medium;
• and
• means for computing from said reflected light an address of a location hit by said first radiated beam.