Patent EP0482621A2 successfully refreshed from Google Patents.
EP0482621A2
Expired / Lapsed
EP
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Recording/reproduction device for recording and reproducing digital data
Assignee: Sharp Corp
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Filing: 1991-10-23
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Granted: —
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Expires: 2011-10-23
Abstract
Abstract A magnetic recording/reproduction device is disclosed that records data while forming serially a plurality of recording tracks (60) in a magnetic tape (6). Each of the plurality of recording tracks have a plurality of data blocks recorded of the same bit length. Each of these plurality of data blocks includes a track data indicating the number of the track to be recorded and a synchronizing data indicating a synchronizing signal. The magnetic recording/reproduction device includes circuits (8, 11) for extracting the synchronizing data and the track data from each of the data blocks reproduced right after recording, a circuit (9) for counting the number of synchronizing data extracted from the read out data blocks, a circuit (10) for detecting a time period interval of synchronizing data for each recording track, a circuit (11) for extracting track data from the read out data blocks, and a circuit (12) for comparing the extracted track data with an expected data for each recording track. A circuit (13) for making determination whether each data block is correctly recorded into a corresponding recording track is implemented to make determination of data being correctly recorded only when the outputs of the circuit for comparison, the circuit for detecting the time interval, and the circuit for counting satisfy a certain condition.
Inventors
- 👤 Kengo Sudoh
- 👤 Chitoku Kiyonaga
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 12:45
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/18; G11B20/1879
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
165 words
A recording/reproduction device for recording data into a recording medium (6) having a plurality of recording tracks (60), and for reading and reproducing said data from said recording medium (6), comprising: means (W1, W2, 4) for recording serially a predetermined number of data blocks into each of said plurality of recording tracks (60), each of said predetermined number of data blocks having a position data in a predetermined position, means (R1, R2, 7) for reproducing each data block recorded in said recording track (60) by said recording means (W1, W2, 4), means (9) for counting the number of said reproduced data blocks, position data extracting means (8) for extracting said position data from each of said data blocks included in said reproduced data, and means (13, 10) responsive to the outputs of said count means (9) and said position data extracting means (8) for making determination whether said predetermined number of data blocks are correctly recorded in each of said plurality of recording tracks (60).
Claim 2
Dependent Claim
105 words
The recording/reproduction device according to claim 1, wherein said predetermined number of data blocks comprise data of the same bit length, said determinating means (13, 10) comprises interval detecting means (10) for detecting whether the interval of the recorded positions of said position data is constant or not in response to the output of said position data extracting means (8), and determination result output means (13) responsive to the outputs of said count means (9) and said interval detecting means (10) to make determination whether said predetermined number of data blocks are correctly recorded in the corresponding recording track (60) for providing the determination result.
Claim 3
Dependent Claim
26 words
The recording/reproduction device according to claim 2, wherein said determinating means (13, 10) carries out said determination for each of said plurality of recording tracks (60).
Claim 4
Dependent Claim
58 words
The recording/reproduction device according to claim 1, further comprising means (1) for controlling said recording means (4, W1, W2) to have said predetermined number of data blocks recorded again in a corresponding recording track (60) when said predetermined number of data blocks are not recorded correctly on said corresponding recording track (60) in response to said determination result.
Claim 5
Dependent Claim
170 words
A recording/reproduction device for recording data into a recording medium (6) having a plurality of recording tracks (60), and for reading and reproducing said data from said recording medium (6), comprising: means (W1, W2, 4) for serially recording a predetermined number of data blocks into each of said plurality of recording tracks (60), each of said predetermined number of data blocks having a track data indicating a recording track (60) in which to be recorded, means (R1, R2, 7) for reproducing each data block recorded in said recording track (60) by said recording means (W1, W2, 4), means (9) for detecting the number of said reproduced data blocks, track data extracting means (11) for extracting said track data from each of said reproduced data blocks, and means (12, 13) responsive to the outputs of said count means (9) and said track data extracting means (11) for making determination whether the corresponding predetermined number of data blocks are correctly recorded or not into each of said plurality of recording tracks (60).
Claim 6
Dependent Claim
87 words
The recording/reproduction device according to claim 5, wherein said determinating means (12, 13) comprises comparing means (12) for comparing a track data extracted by said track data extracting means (11) with a predetermined expected value data, and a determination result output means (13) responsive to the outputs of said count means (9) and said comparing means (12) to make determination whether the corresponding predetermined number of data blocks are correctly recorded or not in each of said plurality of recording tracks (60) for providing the determination result.
Claim 7
Dependent Claim
39 words
The recording/reproduction device according to claim 2, wherein said determinating means (12, 13) carries out said determination for each of said plurality of recording tracks (60), and said predetermined expected value data is incremented for every predetermined time period.
Claim 8
Dependent Claim
58 words
The recording/reproduction device according to claim 5, further comprising means (1) for controlling said recording means (W1, W2, 4) to have said predetermined number of data blocks recorded again into a corresponding recording track (60) when said predetermined number of data blocks are not correctly recorded in said corresponding recording track (60) in response to said determination result.
Claim 9
Dependent Claim
200 words
A recording/reproduction device for recording data into a recording medium (6) having a plurality of recording tracks (60), and for reading and reproducing said data from said recording medium (6), comprising: means (W1, W2, 4) for serially recording a predetermined number of data blocks into each of said plurality of recording tracks (60), each of said plurality of data blocks having a track data indicating a recording track (60) in which to be recorded, and a position data at a predetermined position, means (R1, R2, 7) for reproducing each data block recorded in said recording track (60) by said recording means (W1, W2, 4), means (9) for counting the number of said reproduced data blocks, position data extracting means (8) for extracting said position data from each of said reproduced data blocks, track data extracting means (11) for extracting said track data from each of said reproduced data blocks, and means (10, 12, 13) responsive to the outputs of said count means (9), said track data extracting means (11), and said position data extracting means (8) for making determination whether said predetermined number of data blocks are correctly recorded or not in each of said plurality of recording tracks (60).
Claim 10
Dependent Claim
134 words
The recording/reproduction device according to claim 9, wherein said predetermined number of data blocks comprise data of the same bit length, and wherein said determinating means (10, 12, 13) comprises interval detecting means (10) responsive to the output of said position data extracting means (8) for making determination whether the recorded interval of said position data is constant or not, comparing means (12) for comparing a track data extracted by said track data extracting means (11) with a predetermined expected value data, and determination result output means (13) to make determination whether said predetermined number of data blocks are correctly recorded in the corresponding recording track (60) or not in response to the outputs of said count means (9), said interval detecting means (10) and said comparing means (12) for providing the determination result.
Claim 11
Dependent Claim
39 words
The recording/reproduction device according to claim 10, wherein said determinating means (10, 12, 13) carries out said determination for each of said plurality of recording tracks, and wherein said predetermined expected data is incremented for every predetermined time period.
Claim 12
Dependent Claim
58 words
The recording/reproduction device according to claim 11, further comprising means (1) for controlling said recording means (W1, W2, 4) to have said predetermined number of data blocks recorded again into a corresponding recording track (60) when said predetermined number of data blocks are not correctly recorded into said corresponding recording track (60) in response to said determination result.
Claim 13
Dependent Claim
23 words
The recording/reproduction device according to claim 1, wherein said count means (9) counts the extracted output of said position data extracting means (8).
Claim 14
Dependent Claim
23 words
The recording/reproduction device according to claim 5, wherein said count means (9) counts the extracted output of said position data extracting means (8).
Claim 15
Dependent Claim
23 words
The recording/reproduction device according to claim 9, wherein said count means (9) counts the extracted output of said position data extracting means (8).
References Cited (Backward Citations)
No citation records indexed.
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