Title:
【発明の名称】情報を読み取る方法
Document Type and Number:
Japanese Patent JPH10505936
Kind Code:
A
Abstract:
PCT No. PCT/FR96/00601 Sec. 371 Date Dec. 20, 1996 Sec. 102(e) Date Dec. 20, 1996 PCT Filed Apr. 19, 1996 PCT Pub. No. WO96/33490 PCT Pub. Date Oct. 24, 1996A process for reading binary information written on a carrier. The carrier has at least one track and the binary information is written onto the carrier at a frequency Fbit. The process includes the step of reading binary information at the sampling frequency Fe to form a succession of successive read samples SAM(k) of the same track. SAM(k) is the read sample of order k, each read sample having a phase phi (k) lying between 0 and 2 pi . The method further includes a step of interpolating to make it possible to calculate an interpolated sample I(k) with phase equal to pi which corresponds to read sample SAM(k) on the basis of the read sample and on the i+j read samples which bracket the original read sample SAM(k) such that: I(k)=ak-i SAM(k-i)+ . . . +ak SAM(k)+ . . . +ak+j SAM(k+j)The coefficients have values which depend on the chosen law of interpolation and a step of validation makes it possible to generate an information item intended to validate or invalidate the interpolated sample. The process is especially useful for the reading of binary information written on a large number of tracks.
Inventors:
Odoen, Michel
Anna, Shyara
Corineau, Joseph
Doo Bito, Mario
Anna, Shyara
Corineau, Joseph
Doo Bito, Mario
Application Number:
JP53078996A
Publication Date:
June 09, 1998
Filing Date:
April 19, 1996
Export Citation:
Assignee:
Thomson-S.S.F.
Thomson Miurtay Medea
Thomson Miurtay Medea
International Classes:
G11B5/49; G11B7/00; G11B7/005; G11B11/10; G11B20/14; G11B11/105; G11B20/10; G11B20/20; (IPC1-7): G11B20/14; G11B7/00; G11B11/10; G11B20/14
Attorney, Agent or Firm:
Yoshio Kawaguchi (3 outside)
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