Patent US5122913A successfully refreshed from Google Patents.
US5122913A
Expired / Lapsed
US
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Data recording/reproducing apparatus with error detection and data re-recording
Assignee: Sharp Corp
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Filing: 1989-12-26
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Granted: 1992-06-16
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Expires: 2009-12-26
Abstract
Abstract Generally in the case that a rotary head type digital audio tape recorder is used as an auxiliary storage of a computer or the like, the R-DAT reads recorded data immediately after the data is recorded and inspects its recording state by comparing it with the original recorded data, and if the recording state is inferior, namely, if an error is detected, the R-DAT records the data again in order to improve reliability of the recorded data. Since an R-DAT according to the present invention re-records the original data of the error-detected data plural times, the R-DAT allows for reproduction of the data re-recorded immediately after, or further thereafter the error-detected data, in the case that the first re-recorded data cannot be reproduced correctly. Moreover, since the R-DAT re-records the data in which an error was detected and the data recorded immediately before the error data, the R-DAT can reproduce the re-recorded data in the case that the data contiguous to a defective portion of a recording medium cannot be correctly reproduced due to expansion of the defective portion caused by repetition of reproducing operations, or other reasons. In this way, reliability of recorded data is remarkably improved.
Inventors
- 👤 Hirotoshi Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:01
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/36; G11B20/00; G11B20/10; G11B20/18; G11B20/1879; G11B20/1816; G11B2020/183; G11B2220/00; G11B2220/90; G11B2220/91; G11B2220/913
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
154 words
A data recording/reproducing apparatus for preventing loss of data due to enlargement of defects of a recording medium comprising: recording means for recording data in frames on the recording medium; reading means for reading the data immediately after it is recorded, said reading means being located adjacently to said recording means; and error detecting means for detecting frames in which the read data contains error, on the basis of output of said reading means, said recording means recording the data of the frames in which error has been detected by said error detecting means, and the data of an immediately preceding frame which is error free, on the recording medium plural times in frames which are a predetermined number of frames after the frames in which error has been detected, to prevent loss of data due to enlargement of a defect in the recording medium of the frames in which error has been detected.
Claim 2
Dependent Claim
154 words
A data recording/reproducing apparatus for preventing loss of data due to enlargement of defects of a recording medium comprising: recording means for recording data in frames on the recording medium; reading means for reading the data immediately after it is recorded, said reading means being located adjacently to said recording means; and error detecting means for detecting frames in which the read data contains error, on the basis of output of said reading means, said recording means recording the data of the frames in which error has been detected by said error detecting means, and the data of an immediately preceding frame which is error free, on the recording medium plural times in frames which are a predetermined number of frames after the frames in which error has been detected, to prevent loss of data due to enlargement of a defect in the recording medium of the frames in which error has been detected.
Claim 3
Dependent Claim
142 words
A data recording/reproducing apparatus comprising: recording means for recording data in frames on a recording medium; reading means for reading data immediately after it is recorded, said reading means being located adjacently to said recording means; and error detecting means for detecting frames in which the read data contains error, on the basis of output of said reading means, said recording means recording, on the recording medium, the data of the unit frames in which error has been detected by said error detecting means, and one or plural contiguous frames preceding the frames in which error has been detected, in frames which are a predetermined number of frames after the frames in which error has been detected, to prevent loss of data due to enlargement of a defect in said recording medium of the frames in which the error has been detected.
Claim 4
Dependent Claim
142 words
A data recording/reproducing apparatus comprising: recording means for recording data in frames on a recording medium; reading means for reading data immediately after it is recorded, said reading means being located adjacently to said recording means; and error detecting means for detecting frames in which the read data contains error, on the basis of output of said reading means, said recording means recording, on the recording medium, the data of the unit frames in which error has been detected by said error detecting means, and one or plural contiguous frames preceding the frames in which error has been detected, in frames which are a predetermined number of frames after the frames in which error has been detected, to prevent loss of data due to enlargement of a defect in said recording medium of the frames in which the error has been detected.
Claim 5
Dependent Claim
23 words
The data recording/reproducing apparatus as claimed in claim 1 or 2, wherein said recording means records the data by a helical scan method.
Claim 6
Independent Claim
164 words
A method of recording data on a recording medium having plural frames, using a recording/reproducing apparatus including adjacent recording means and reading means, comprising the steps of: storing the data to be recorded sequentially in memory means under direction of control means; recording the stored data in sequential order in consecutive frames of the recording medium using the recording means; reading the recorded data of the frames with the reading means immediately after it is recorded; determining in error detecting means the frames in which the read data contains error; and re-recording the stored data corresponding to the frames in which error has been detected, during said determining step, and the stored data corresponding to a frame immediately preceding the frames in which error has been detected to record error-free data and to prevent loss of the data due to enlargement of defects in the recording medium, said recording continuing sequentially in the event that error has not been detected during said determining step.
Claim 7
Independent Claim
164 words
A method of recording data on a recording medium having plural frames, using a recording/reproducing apparatus including adjacent recording means and reading means, comprising the steps of: storing the data to be recorded sequentially in memory means under direction of control means; recording the stored data in sequential order in consecutive frames of the recording medium using the recording means; reading the recorded data of the frames with the reading means immediately after it is recorded; determining in error detecting means the frames in which the read data contains error; and re-recording the stored data corresponding to the frames in which error has been detected, during said determining step, and the stored data corresponding to a frame immediately preceding the frames in which error has been detected to record error-free data and to prevent loss of the data due to enlargement of defects in the recording medium, said recording continuing sequentially in the event that error has not been detected during said determining step.
Claim 8
Dependent Claim
35 words
The method of recording data in claim 4, wherein said step of re-recording comprises re-recording the stored data corresponding to the frames in which error has been detected and the immediately preceding frame plural times.
Claim 9
Dependent Claim
51 words
The method of recording data of claim 5, wherein said step of re-recording comprises re-recording the stored data corresponding to the frames in which error has been detected and the immediately preceding frame in frames which are a predetermined number of frames after the frames in which error has been detected.
Claim 10
Dependent Claim
26 words
The method of recording data of claim 4, further comprising stopping said step of storing the data sequentially in the event that error has been detected.
Claim 11
Dependent Claim
28 words
The method of recording data of claim 4, said step of re-recording further comprising re-recording the stored data corresponding to plural frames which precede the immediately preceding frame.
Claim 12
Dependent Claim
201 words
A data recording/reproducing apparatus comprising: memory means for sequentially storing data to be recorded on a recording medium in plural frames; recording means for sequentially recording the data on the recording medium in consecutive frames; interface means for receiving input data to be recorded and for simultaneously supplying the data to said memory means and said recording means; reading means, disposed adjacently to said recording means, for reading the recorded data from the recording medium immediately after it is recorded; and error detecting means, coupled to said reading means, said recording means and said interface means, for comparing the recorded data of the frames to corresponding stored data to determine the frames in which the recorded data contains error, said recording means re-recording the stored data corresponding to the frames in which error has been detected by said error detecting means, and the stored data corresponding to an immediately preceding frame which is error-free, on the recording medium in frames which are a predetermined number of frames after the frames in which error has been detected, to prevent loss of data due to enlargement of a defect in the recording medium corresponding to the frames in which error has been detected.
Claim 13
Dependent Claim
201 words
A data recording/reproducing apparatus comprising: memory means for sequentially storing data to be recorded on a recording medium in plural frames; recording means for sequentially recording the data on the recording medium in consecutive frames; interface means for receiving input data to be recorded and for simultaneously supplying the data to said memory means and said recording means; reading means, disposed adjacently to said recording means, for reading the recorded data from the recording medium immediately after it is recorded; and error detecting means, coupled to said reading means, said recording means and said interface means, for comparing the recorded data of the frames to corresponding stored data to determine the frames in which the recorded data contains error, said recording means re-recording the stored data corresponding to the frames in which error has been detected by said error detecting means, and the stored data corresponding to an immediately preceding frame which is error-free, on the recording medium in frames which are a predetermined number of frames after the frames in which error has been detected, to prevent loss of data due to enlargement of a defect in the recording medium corresponding to the frames in which error has been detected.
Claim 14
Dependent Claim
17 words
The data recording/reproducing apparatus of claim 9, wherein said recording means re-records the stored data plural times.
Claim 15
Dependent Claim
40 words
The data recording/reproducing apparatus of claim 9, wherein said interface means stops the supply of the data to said memory means and said recording means if said error detecting means determines that the recorded data has been recorded with error.
Claim 16
Dependent Claim
39 words
The data recording/reproducing apparatus of claim 9, wherein said interface means continues to supply the data to said memory means and said recording means if said error detecting means determines that the recorded data has been recorded without error.
Claim 17
Dependent Claim
133 words
A data recording/reproducing apparatus comprising: recording means for recording data in frames on a recording medium; and reading means for reading the data immediately after it is recorded, said reading means being located adjacently to said recording means; and error detecting means for detecting frames in which the read data contains error, on the basis of output of said reading means, said recording means recording the data of the frames in which error has been detected by said error detecting means and an immediately preceding error-free frame, on said recording medium plural times in frames which are located a predetermined distance from the frames in which error has been detected, the predetermined distance being a distance which allows tracking control recovery from tracking disorder which occurs as a result of the detected error.
Claim 18
Dependent Claim
133 words
A data recording/reproducing apparatus comprising: recording means for recording data in frames on a recording medium; and reading means for reading the data immediately after it is recorded, said reading means being located adjacently to said recording means; and error detecting means for detecting frames in which the read data contains error, on the basis of output of said reading means, said recording means recording the data of the frames in which error has been detected by said error detecting means and an immediately preceding error-free frame, on said recording medium plural times in frames which are located a predetermined distance from the frames in which error has been detected, the predetermined distance being a distance which allows tracking control recovery from tracking disorder which occurs as a result of the detected error.
Claim 19
Dependent Claim
19 words
The data recording/reproducing apparatus of claim 13, wherein said recording means records the data by a helical scan method.
Claim 20
Dependent Claim
183 words
A data recording/reproducing apparatus comprising: memory means for sequentially storing data to be recorded on a recording medium which has plural frames; recording means for sequentially recording the data on the recording medium in consecutive frames; interface means for receiving input data to be recorded and for simultaneously supplying the data to said memory means; reading means disposed adjacently to said recording means, for reading the recorded data from the recording medium immediately after it is recorded; and error detecting means, coupled to said reading means, said recording means and said interface means, for comparing the recorded data of the frames to corresponding stored data to determine frames in which the recorded data contains error, said recording means re-recording the stored data corresponding to the frames in which error has been detected by said error detecting means and an immediately preceding error-free frame in frames which are located a predetermined distance from the frames in which error has been detected, the predetermined distance being a distance which allows tracking control recovery from tracking disorder which occurs as a result of the detected error.
Claim 21
Dependent Claim
183 words
A data recording/reproducing apparatus comprising: memory means for sequentially storing data to be recorded on a recording medium which has plural frames; recording means for sequentially recording the data on the recording medium in consecutive frames; interface means for receiving input data to be recorded and for simultaneously supplying the data to said memory means; reading means disposed adjacently to said recording means, for reading the recorded data from the recording medium immediately after it is recorded; and error detecting means, coupled to said reading means, said recording means and said interface means, for comparing the recorded data of the frames to corresponding stored data to determine frames in which the recorded data contains error, said recording means re-recording the stored data corresponding to the frames in which error has been detected by said error detecting means and an immediately preceding error-free frame in frames which are located a predetermined distance from the frames in which error has been detected, the predetermined distance being a distance which allows tracking control recovery from tracking disorder which occurs as a result of the detected error.
Claim 22
Dependent Claim
19 words
The data recording/reproducing apparatus of claim 15, wherein said recording means records the data by a helical scan method.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-16 | 1995-12-16 | 1996-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-16 | 1999-12-16 | 2000-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-16 | 2003-12-16 | 2004-06-16 | $7700.00 | Window Closed / Lapsed |