EP0488373A2
Expired / Lapsed
EP
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Magnetic tape recording/reproducing apparatus and method
Assignee: Sharp Corp
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Filing: 1991-11-29
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Granted: —
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Expires: 2011-11-29
Abstract
Abstract A magnetic tape recording/reproducing apparatus wherein an area consisting of a predetermined number of successive tracks (a) on a magnetic tape (T) constitutes a unit record area, the unit record area being partitioned into at least two divisional record areas each consisting of successive tracks so that plural systems of data are allocated to the divisional record areas for being separately recorded therein for individual systems, wherein, together with first identification data (ID1) indicative of the order of track arrangement and second identification data (ID2) for identifying the divisional record area in which the track is included there are recorded, as third identification data (ID3), first identification data for a track located at the beginning of the divisional record area in which the track is included. According to the arrangement, the third identification data (= first identification data) indicative of the beginning position of the record area to be searched can be recognized in the course of high speed retrieval operation and, therefore, easy access to the beginning position of the record area to be search can be gained in short time through usual reproducing operation.
Inventors
- 👤 Syuzou Nishida
- 👤 Kousou Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 19:50
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/92; H04N5/926; H04N5/9265; G; G11; G11B; G11B15/00; G11B15/02; G11B15/05; G11B15/087; G11B15/18; G11B15/1808; G11B15/1875; G11B15/46; G11B15/467; G11B15/4671; G11B27/00; G11B27/02; G11B27/031; G11B27/032; G11B27/10; G11B27/102; G11B27/107; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B27/3063; H04N5/9201; H04N5/9202; H04N5/9203; H04N5/9206; H04N5/9208; G11B2220/00; G11B2220/90; G11B2220/91; G11B2220/913
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
284 words
A magnetic tape recording/reproducing apparatus wherein an area consisting of a predetermined number of successive tracks (a) on a magnetic tape (T) constitutes a unit record area, the unit record area being partitioned into at least two divisional record areas each consisting of successive tracks so that plural systems of data are allocated to the divisional record areas for being separately recorded therein for individual systems, the apparatus comprising: first identification data recording means (4,5,6,13,14) for recording first identification data (ID1) indicative of the order of track arrangement, in a sub-data record area (18) of each track (a); second identification data recording means (4,5,6,13,14) for recording, in the sub-data record area (18) of each track (a), second identification data (ID2) for identifying the divisional area in which the track in included; third identification data recording means (4,5,6,13,14) for recording, in the sub-data record area (18) of each track (a) and as third identification data (ID3), first identification data (ID1) corresponding to a track positioned at the beginning of the divisional record area in which the particular track is included; and retrieval means (3,5,6,14) for retrieving at high speed the divisional record area to be retrieved on the basis of the second identification data (ID2) using a record area located at the beginning side of the magnetic tape (T) as sub-target, reading out a third identification data (ID3) of the divisional record area to be retrieval or the record area at the beginning side of the magnetic tape (T) during the high speed retrieval, and retrieving at reproduction speed the beginning position of the divisional record area to be retrieved on the basis of the read-out third identification data (ID3) after the high speed retrieval.
Claim 2
Dependent Claim
115 words
A magnetic tape recording/reproducing apparatus as set forth in claim 1, wherein the retrieval means (3,5,6,14) is of such arrangement that when it detects the second identification data (ID2) indicative of the record area to be searched through high speed retrieval during its retrieval operation toward the beginning of the magnetic tape (T), it stores therein the third identification data (ID3) for the record area, and when it detects a record area located at the beginning side of the record area to be searched, its operation is switched over to a retrieval operation in usual reproduction mode, the retrieval operation being ended upon detection of a track corresponding to the stored third identification data (ID3).
Claim 3
Dependent Claim
123 words
A magnetic tape recording/reproducing apparatus as set forth in claim 1 or 2, wherein the retrieval means (3,5,6,14) is of such arrangement that when it detects a record area located at the beginning side of the record area to be searched through high speed retrieval during its retrieval operation toward the end of the magnetic tape (T), it determines, on the basis of the third identification data (ID3) for the detected area, third identification data (ID3) for the record area to be searched and stores same therein, and the mode of its operation is then switched over to a retrieval operation in usual reproduction mode, the retrieval operation being ended upon detection of a track corresponding to the stored third identification data (ID3).
Claim 4
Dependent Claim
145 words
A magnetic tape recording method wherein an area consisting of a predetermined number of successive tracks (a) on a magnetic tape (T) constitutes a unit record area, the unit record area being partitioned into at least two divisional record areas each consisting of successive tracks so that plural systems of data are allocated to the divisional record areas for being separately recorded therein for individual systems, characterized in: that in a sub-data record area (18) of each track (a) are recorded, in conjunction with first identification data (ID1) indicative of the order of track arrangement and second identification data (ID2) for identifying the divisional record areas in which the track is included, that part of the first identification data (ID1) which corresponds to a track located at the beginning of the divisional record area in which the track is included, as third identification data (ID3).
Claim 5
Dependent Claim
215 words
A magnetic tape reproducing method wherein an area consisting of a predetermined number of successive tracks (a) constitutes a unit record area, the unit record area being partitioned into at least two divisional record areas each consisting of successive tracks so that plural systems of data are allocated to the divisional record areas for being separately recorded therein for individual systems, and wherein a sub-data record area (18) of each track (a) has recorded therein, together with first identification data (ID1) indicative of the order of track arrangement and second identification data (ID2) for identifying the divisional record area in which the track is included, that part of the first identification data (ID1) which corresponds to a track located at the beginning of the divisional record area in which the track is included, as third identification data (ID3), the method comprising the steps of: retrieving through high speed retrieval operation the record position of the second identification data (ID2) indicative of the divisional record area to be searched, retrieving at a reproduction rate the beginning position of the divisional record area to be searched on the basis of third identification data (ID3) recorded in the track at the retrieved position, and switching the retrieval operation to reproducing operation upon the detection of the beginning position.
References Cited (Backward Citations)
No citation records indexed.
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