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WO1992005549A1 - Bande magnetique - Google Patents

Bande magnetique Download PDF

Info

Publication number
WO1992005549A1
WO1992005549A1 PCT/EP1991/001759 EP9101759W WO9205549A1 WO 1992005549 A1 WO1992005549 A1 WO 1992005549A1 EP 9101759 W EP9101759 W EP 9101759W WO 9205549 A1 WO9205549 A1 WO 9205549A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic tape
tape
strips
information
transparent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP1991/001759
Other languages
German (de)
English (en)
Inventor
Ingolf Brauner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gigatape Systeme fur Datensicherung GmbH
Original Assignee
Gigatape Systeme fur Datensicherung GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gigatape Systeme fur Datensicherung GmbH filed Critical Gigatape Systeme fur Datensicherung GmbH
Publication of WO1992005549A1 publication Critical patent/WO1992005549A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/05—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container
    • G11B15/06—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container by sensing auxiliary features on record carriers or containers, e.g. to stop machine near the end of a tape
    • G11B15/08—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container by sensing auxiliary features on record carriers or containers, e.g. to stop machine near the end of a tape by photoelectric sensing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/30—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture with provision for auxiliary signals
    • G11B23/34—Signal means additional to the main recording track, e.g. photoelectric sensing of sprocket holes for timing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/38—Visual features other than those contained in record tracks or represented by sprocket holes the visual signals being auxiliary signals
    • G11B23/40—Identifying or analogous means applied to or incorporated in the record carrier and not intended for visual display simultaneously with the playing-back of the record carrier, e.g. label, leader, photograph
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/24—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by sensing features on the record carrier other than the transducing track ; sensing signals or marks recorded by another method than the main recording
    • G11B27/26—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by sensing features on the record carrier other than the transducing track ; sensing signals or marks recorded by another method than the main recording by photoelectric detection, e.g. of sprocket holes
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/90—Tape-like record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/90—Tape-like record carriers
    • G11B2220/91—Helical scan format, wherein tracks are slightly tilted with respect to tape direction, e.g. VHS, DAT, DVC, AIT or exabyte
    • G11B2220/913—Digital audio tape [DAT] format

Definitions

  • the invention relates to a magnetic tape of the type specified in the preamble of claim 1.
  • Such tapes are in the most varied variants, for example as audio, video and computer data tapes in circulation and are either assembled on open spools or in cassettes.
  • the so-called compact cassettes are one of the most widely used data carriers and are used both for recording analog data, such as music, and for recording digital data.
  • a relatively young data carrier, the so-called DAT cassette is used exclusively for recording digital data, and is currently the most compact data carrier based on magnetic tapes.
  • Magnetic tapes are commercially available in a wide variety of lengths and continue to differ, among other things, in the tape material used, especially in the coating material used for recording.
  • the decisive factor for the recording quality is the premagnetization that depends on the coating material during recording.
  • recesses for identification of the tape type are provided on the back of the compact cassette, which are mechanically scanned by recording devices.
  • holes are formed on the bottom of the housing, which are also mechanically scanned by the recording device and u. a. Includes information about the tape length. Mechanical scanning is extremely complex because of the precision mechanics required for this. The number of mechanically scannable information is naturally only available for a very limited amount of information.
  • Magnetic tapes wound on open spools are not suitable for mechanical marking of tape parameters due to the lack of a fixed spool housing during recording.
  • the invention has for its object to provide a magnetic tape of the type mentioned, which can be identified in terms of its parameters in a simple manner and can be easily provided with further information in addition to the useful data without adversely affecting the latter.
  • the invention consists in creating a marking area on the tape which is independent of the area for recording the useful data and which can be read out optically.
  • Such an optical marking in no way influences the spatially separate and technically different recording and reproduction of the electromagnetic useful data.
  • the optical marking allows almost any storage of additional data or additional information relating to tape parameters and other data related to the useful information.
  • one advantage of accommodating information about tape parameters, such as tape type and type of coating is that complex and susceptible mechanical scanning mechanisms can be dispensed with. Since recording and recording devices for tape cassettes generally have optoelectronic detectors for detecting the end of the tape and the beginning of the tape, these existing detectors can also advantageously be used to evaluate the optical tape information provided according to the invention.
  • the invention provides the advantage that information about tape parameters can now be made available at all and permanently.
  • Another advantage over the electromagnetic recording of information supplementing useful data, in the form of the tape according to the invention, is that this additional information is present in a different type of recording independently of useful signals and therefore does not need to be interpreted by additional evaluation electronics.
  • any pattern forms are suitable as a pattern for the optically readable marking area provided according to the invention for additional information about the tape or for information in connection with the tape.
  • the use of a sequence of translucent and opaque strips on the transparent band area is particularly advantageous. These strips, which are preferably arranged transversely, namely essentially vertically to the tape running direction, can be used to encrypt a variety zahi different additional information can be arranged in different widths and distances, so that, for example, when reading the optical information per unit of time there are corresponding variations alternating transparent / non-transparent.
  • a wide variety of techniques are suitable for producing the marking according to the invention, such as, for example, splicing, pasting, or printing on the transparent tape area or applying a correspondingly patterned decal.
  • the marking area according to the invention is provided at the beginning or end of the tape, and the transparent leading and trailing tapes of the invention which may already be present can also be marked accordingly.
  • the marking according to the invention is also advantageously suitable for marking special tape areas, such as for example marking a measuring area (in particular for audio applications), a reference area or a cleaning area (with cleaning tape).
  • the marking according to the invention can also contain information that is of interest for research and development or the service of tape devices, such as for example determining the current tape speed by measuring the time between two marking strips. These markings are also useful for identifying certain tapes according to their content, such as a test tape.
  • the invention provides the advantage of increased protection against misuse by introducing a serial number or a password or keyword.
  • Keyable information relates to information about the length of the tape (which means that there is no need to completely wind through to determine the length), about the tape material (especially the Vegas coating), about the maximum recording density, about the manufacturer and the serial number and the like.
  • the strip section 1 shown consists of transparent material and carries a plurality of optically readable markings in the form of strips 2, 3, 4 and 5. These strips run vertically to the longitudinal direction of the strip and, due to their shape and arrangement, provide an additional one to the magnetically coated strip area Information carrier.
  • the three strips 2, 3 and 5 have the same 3 rider and are narrower than a strip 4 arranged between the strips 3 and 5.
  • the distance between the two narrow strips 2 and 3 is less than the distance between the further narrow strip 5 and the wide one Stripe 4 and greater than the distance between the narrow stripe 3 and the wide stripe 4.
  • the strips can be applied to the transparent support in a wide variety of ways. Printing on the transparent substrate is particularly suitable for mass production. A blackening for the strips is preferred in favor of an at least 95% light-dark transition.

Landscapes

  • Magnetic Record Carriers (AREA)

Abstract

Une bande magnétique d'enregistrement électromagnétique de données contient une section transparente (1) qui porte des marques sous forme d'informations optiquement lisibles. Ces informations peuvnt concerner des paramètres de la bande magnétique, ainsi que des informations supplémentaires relatives à la bande. De préférence, les marques sont des bandes (2, 3, 4, 5) opaques à la lumière, transversales par rapport à la longueur de la section transparente (1) et ayant différentes largeurs ou différents écartements. Dans le cas de cassettes DAT, les informations concernant la bande, jusqu'à maintenant ménagées sur le boîtier de la cassette et mécaniquement explorables, peuvent, selon l'invention, être enregistrées sur la section transparente (1) de la bande et/ou être complétées par n'importe quel nombre d'informations supplémentaires.
PCT/EP1991/001759 1990-09-17 1991-09-16 Bande magnetique Ceased WO1992005549A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4029469.2 1990-09-17
DE19904029469 DE4029469A1 (de) 1990-09-17 1990-09-17 Magnetband

Publications (1)

Publication Number Publication Date
WO1992005549A1 true WO1992005549A1 (fr) 1992-04-02

Family

ID=6414420

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1991/001759 Ceased WO1992005549A1 (fr) 1990-09-17 1991-09-16 Bande magnetique

Country Status (2)

Country Link
DE (1) DE4029469A1 (fr)
WO (1) WO1992005549A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2266402A (en) * 1992-04-22 1993-10-27 Hewlett Packard Ltd System for identifying data storage tapes

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2242210A1 (de) * 1972-08-28 1974-03-07 Licentia Gmbh System zum auffinden bestimmter stellen eines magnetbandes
DE2756610A1 (de) * 1977-12-19 1979-06-21 Stoeckigt Gerhard Dipl Wirtsch Anordnung zum auffinden beliebiger positionen auf einem magnetband
DE3505985A1 (de) * 1985-02-21 1986-08-21 Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover Videorecorder mit selbsttaetiger erfassung von an der kassette angebrachten kennwerten
US4848698A (en) * 1988-06-02 1989-07-18 Newell Research Corporation Method for writing and means for reading position-indicating markers on tape

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2242210A1 (de) * 1972-08-28 1974-03-07 Licentia Gmbh System zum auffinden bestimmter stellen eines magnetbandes
DE2756610A1 (de) * 1977-12-19 1979-06-21 Stoeckigt Gerhard Dipl Wirtsch Anordnung zum auffinden beliebiger positionen auf einem magnetband
DE3505985A1 (de) * 1985-02-21 1986-08-21 Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover Videorecorder mit selbsttaetiger erfassung von an der kassette angebrachten kennwerten
US4848698A (en) * 1988-06-02 1989-07-18 Newell Research Corporation Method for writing and means for reading position-indicating markers on tape

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2266402A (en) * 1992-04-22 1993-10-27 Hewlett Packard Ltd System for identifying data storage tapes
GB2266402B (en) * 1992-04-22 1995-11-08 Hewlett Packard Ltd System for identifying data storage tapes

Also Published As

Publication number Publication date
DE4029469A1 (de) 1992-03-19

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