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US5161072A Expired / Lapsed US ⏱️ 0.0 years remaining

Information recording/reproducing apparatus for recording information and verifying recorded information

Assignee: Panasonic Holdings Corp
•
Filing: 1990-10-24
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Granted: 1992-11-03
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Expires: 2010-10-24
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Abstract

Abstract An information recording/reproducing apparatus having a function to verify recorded information. A controller of the apparatus divides information to be recorded into two or more portions so that the first division portion is successively recorded over a first group of a plurality of blocks formed circumferentially on a disc-like recording medium and then reproduced for verification, before the second division portion is successively recorded over a second group of blocks which are consecutive to the first group of blocks and then reproduced for the verification, the recording and reproduction being continuously effected up to the last division portion. When verifying the first division portion through the penultimate division portion, only the final group of one or more blocks of the blocks of the just recorded division portion are not verified immediately but, after the recording for a subsequent division portion, verified together with the blocks of the subsequent division portion other than final group of one or more blocks of the subsequently recorded division portion. All blocks of the last division portion reproduced for verification are verified together with previously recorded and non-verified blocks from other division portions.

Inventors

  • 👤 Takaharu Ai

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 15:12
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/18; G11B20/1879; G11B2020/10916

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 238 words
An information recording/reproducing apparatus with recorded data verification capability comprising: recording means for recording information on a disc-like recording medium rotatable by rotating means; reproducing means for reproducing the information recorded on said disc-like recording medium by said recording means; and control means for controlling said recording means and said reproducing means so as to record the information on said disc-like recording medium and reproduce the information recorded thereon for verification of the recorded information, said control means dividing the information to be recorded into two or more portions so that a first division portion is successively recorded over a first group of a plurality of blocks successively formed circumferentially on said disc-like recording medium and then reproduced for verification before a second division portion is successively recorded over a second group of blocks which are consecutive to said first group of blocks and then reproduced for verification, the recording and reproduction being continuously effected up to a last division portion, wherein when verifying the first division portion through a penultimate division portion, only a final group of one or more blocks of a just recorded division portion are verified after recording a successive division portion together with blocks of the successive division portion other than a final group of one or more blocks of the successive division portion, and all blocks of the last division portion are verified together with non-verified blocks from said penultimate division portion.
Claim 2
Dependent Claim 238 words
An information recording/reproducing apparatus with recorded data verification capability comprising: recording means for recording information on a disc-like recording medium rotatable by rotating means; reproducing means for reproducing the information recorded on said disc-like recording medium by said recording means; and control means for controlling said recording means and said reproducing means so as to record the information on said disc-like recording medium and reproduce the information recorded thereon for verification of the recorded information, said control means dividing the information to be recorded into two or more portions so that a first division portion is successively recorded over a first group of a plurality of blocks successively formed circumferentially on said disc-like recording medium and then reproduced for verification before a second division portion is successively recorded over a second group of blocks which are consecutive to said first group of blocks and then reproduced for verification, the recording and reproduction being continuously effected up to a last division portion, wherein when verifying the first division portion through a penultimate division portion, only a final group of one or more blocks of a just recorded division portion are verified after recording a successive division portion together with blocks of the successive division portion other than a final group of one or more blocks of the successive division portion, and all blocks of the last division portion are verified together with non-verified blocks from said penultimate division portion.
Claim 3
Dependent Claim 65 words
An apparatus as claimed in claim 1, wherein said control means determines a number of non-verified blocks for each of the division portions so that a time required for rotation of said disc-like recording medium corresponding to the non-verified blocks of a division portion is longer than a time required for recording a successive division portion after completion of verification of a successive division portion.
Claim 4
Dependent Claim 33 words
An apparatus as claimed in claim 1, wherein said control means includes memory means to temporarily store data corresponding to non-verified blocks of a division portion until verification of a successive division portion.

References Cited (Backward Citations)

US3550103A Cited
US4611314A Cited
JPS59146466A Cited
US4637023A Cited
JPS61123062A Cited
JPS63195877A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1995-11-03 1996-05-04 1996-11-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1999-11-03 2000-05-04 2000-11-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2003-11-03 2004-05-04 2004-11-03 $7700.00 Window Closed / Lapsed

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