Method and apparatus for identifying and skipping defective sections
AssigneeSony Corporation
InventorHideo Obata
Life of this patent
Estimating the term…
Abstract
In the case where predetermined data is recorded on the disc in which divided clusters each having a predetermined section are formed in the track, when it is determined during recording that a cluster is a defective section, the recording is stopped and the recording begins again with a cluster offset from the defective cluster, whereby even if there is a partial defect in the track on the disc, the data can be recorded with accuracy.
Claims6
A disc recording apparatus, comprising:
- a disc shaped recording medium having tracks that are divided into a plurality of sections;
- means for recording data to said disc;
- discriminating means for discriminating whether the section of the disc under recordation is defective, the discriminating means utilizes turbulence of an error signal for said discrimination of the section for a defect, wherein said turbulence of said error signal is detected by an optical block for recording data on the disc, said discriminating means sensing defective sections by sensing a turbulence of said error signal exceeding a predetermined amount;
- and
- controlling means for controlling said recording means wherein if said discriminating means discriminates that the section under recording is a defective one, then the recording is stopped and a section offset is calculated from said defective section to identify a calculated section that follows said defective section, and said recording means is moved to said calculated section where recordation begins again;
- wherein said calculated section immediately follows said defective section on said disc.
A recording method for recording predetermined data on a disc having tracks which are divided into predetermined sections, the recording method comprising the steps of:
- commencing recordation of the data into the sections on the disc;
- discriminating whether a section subject to recordation is defective by utilizing turbulence of an error signal wherein said turbulence of said error signal is detected by an optical block for recording data on the disc, said discriminating step sensing defective sections by sensing a turbulence of said error signal exceeding a predetermined amount;
- stopping said recording in case of a defect being discriminated in a section subject to recordation on the disc;
- calculating a position offset by a predetermined length from said defective section;
- and
- restarting the recording from said calculated position again;
- wherein said calculated position is a beginning of a section immediately subsequent to said defective section on said disc.
Dependencies are inferred from the claim text.