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1. (EP0803120) SYSTEM, APPARATUS AND METHOD FOR RECORDING AND REPRODUCING INFORMATION

Office : European Patent Office
Application Number: 96933586 Application Date: 25.10.1996
Publication Number: 0803120 Publication Date: 29.10.1997
Publication Kind : B1
Prior PCT appl.: Application Number:IB1996001154 ; Publication Number: Click to see the data
IPC:
G 11B
G11B 5/00
G11B 5/008
G11B 5/48
G11B 5/58
G11B 5/584
G11B 5/596
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5
Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
48
Disposition or mounting of heads relative to record carriers
58
with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
584
for track following on tapes
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5
Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
(Deprecated)
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5
Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
02
Recording, reproducing or erasing methods; Read, write or erase circuits therefor
027
Analogue recording
08
Boundary-displacement recording
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5
Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
48
Disposition or mounting of heads relative to record carriers
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5
Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
48
Disposition or mounting of heads relative to record carriers
58
with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5
Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
48
Disposition or mounting of heads relative to record carriers
58
with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
584
for track following on tapes
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5
Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
48
Disposition or mounting of heads relative to record carriers
58
with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
596
for track following on discs
CPC:
G11B 5/584
G11B 5/00817
G11B 5/4893
G11B 5/58
G11B 5/596
G11B 2005/0016
Applicants: ONSTREAM INC
Inventors: KALFS JOHANNES JOZEF WILHELMUS
HOOGENDOORN ABRAHAM
Priority Data: 95203068 10.11.1995 EP
96933586 25.10.1996 EP
9601154 25.10.1996 IB
Title: (DE) SYSTEM,VORRICHTUNG UND VERFAHREN ZUR AUFNAHME UND WIEDERGABE VON INFORMATIONEN
(EN) SYSTEM, APPARATUS AND METHOD FOR RECORDING AND REPRODUCING INFORMATION
(FR) SYSTEME, APPAREIL ET PROCEDE D'ENREGISTREMENT ET DE REPRODUCTION DE L'INFORMATION
Abstract: front page image
(EN) The system comprises a magnetic tape (10), a magnetic-head unit (20) and an actuator (40). The magnetic tape (10) has servo tracks (11-19) containing servo signals. The servo signals have been written with a magnetic head, not shown, having a comparatively large gap length. As a result, the servo signals are recorded deep into the magnetic tape (10). The magnetic-head unit (20) comprises a read head (21) and a write head (22) to inscribe the track (63), the read head following a bounding line (13a) between adjacent servo tracks (13 and 14) in response to the servo signals read from said servo tracks (13 and 14) by the read head (21). The system in accordance with the invention is characterized in that it comprises control means which determine the sequence in which the information tracks (61-68) are written, the read head (21) either following a track (61 or 63) between two respective non-overwritten parts (60 and 62 or 62 and 64) of the magnetic tape (10), or following a track (62 or 64) between two respective overwritten parts (61 and 63 or 63 and 65) of the magnetic tape (10).
(FR) Ce système comporte une bande magnétique (10), une unité de tête magnétique (20) et un actionneur (40). La bande magnétique (10) comporte des servo-pistes (11-19) contenant des servo-signaux. Ces servo-signaux ont été écrits par une tête magnétique, non représentée, présentant une longueur d'entrefer relativement importante. De ce fait, les servo-signaux sont enregistrés en profondeur dans la bande magnétique (10). L'unité de tête magnétique (20) est constituée d'une tête de lecture (21) et d'une tête d'écriture (22) permettant d'écrire sur la piste (63), la tête de lecture suivant une ligne de séparation (13a) entre des servo-pistes adjacentes (13, 14) en réponse à des servo-signaux lus sur les servo-pistes (13 et 14) par la tête de lecture 21. Le système selon l'invention est caractérisé par le fait qu'il comporte des moyens de commande déterminant la séquence suivant laquelle les pistes d'information (61-68) sont écrites, la tête de lecture (21) suivant une piste (61 ou 63) entre deux régions non réécrites correspondantes (60 et 62 ou 62 et 64) de la bande magnétique (10), ou suivant une piste (62 ou 64) entre deux régions réécrites correspondantes (61 et 63 ou 63 et 65) de la bande magnétique (10).
Also published as:
JPH10512705CN1168189KR1019980701266WO/1997/017700