Apparatus for and method of reading datas recorded on an optical disc
AssigneePioneer Electronic Corporation
InventorYukiyoshi Haraguchi
Life of this patent
Estimating the term…
Abstract
An apparatus reads data signal recorded on an optical disc on which a gathering track including n recording tracks and a guard track neighboring to the gathering track are spirally formed. The apparatus includes: light beam irradiating unit for irradiating (n+1) light beams onto boundaries of the n recording tracks and the guard track, photodetecting unit for receiving (n+1) light beams reflected by the surface of the optical disc and producing (n+1) track boundary data signals, and computing unit for calculating the (n+1) track boundary data signals to produce n read-out data signals corresponding to the data signals recorded on the n recording tracks.
Claims7
An apparatus for reading data signals recorded on an optical disc on which a gathering track including n recording tracks and a guard track neighboring to the gathering track are spirally formed, wherein the n is an integer and is equal to or greater than 3, said apparatus comprising:
- light beam irradiating means for irradiating (n+1) light beams onto boundaries of the n recording tracks and the guard track;
- photodetecting means for receiving (n+1) light beams reflected by the surface of the optical disc and producing (n+1) track boundary data signals, wherein said (n+1) track boundary data signals include said data signals recorded on the recording tracks and the guard track;
- and
- computing means for calculating the (n+1) track boundary data signals to produce n read-out data signals corresponding to the data signals recorded on the n recording tracks.
A method of reading data signals recorded on an optical disc on which a gathering track including n recording tracks and a guard track neighboring to the gathering track are spirally formed, wherein the n is an integer and is equal or greater than 3, as said method comprising the steps of:
- irradiating (n+1) light beams onto boundaries of the n recording tracks and the guard track;
- receiving (n+1) light beams reflected by the surface of the optical disc and producing (n+1) track boundary data signals, wherein said (n+1) track boundary data signals include the data signals recorded on the recording tracks and the guard track;
- and
- calculating the (n+l) track boundary data signals to produce n read-out data signals corresponding to the data signals recorded on the n recording tracks.
Dependencies are inferred from the claim text.