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1.发明公开SYSTEM FOR RECORDING AND/OR REPRODUCING INFORMATION, MEDIUM FOR USE IN THE SYSTEM, AND MAGNETIC WRITE HEAD AND ARRANGEMENT FOR FORMATTING THE MEDIUM 失效系统记录和/或信息介质的再现使用的系统和磁触控笔和制度安排磁盘格式
公开(公告)号：EP0891619A1
公开(公告)日：1999-01-20
申请号：EP97913363.0
申请日：1997-12-04
CPC分类号： G11B15/087 , G11B5/00817 , G11B5/4886 , G11B5/4893 , G11B5/5526 , G11B5/5565 , G11B5/5582 , G11B5/58 , G11B5/584 , G11B5/59605 , G11B5/59627 , G11B5/5965 , G11B5/59688 , G11B5/78 , G11B5/82 , G11B15/52 , G11B25/063 , G11B33/14
摘要： The invention relates to a system comprising a magnetic tape (310) formatted by means of a write head (360), and an apparatus comprising a magnetic head unit (320) which is movable on a transverse direction (y) by means of an actuator. By means of the write head (360) the magnetic tape (310) has been provided with a pattern of servotracks ST101-ST127 which extend in a longitudinal direction (x). The odd-numbered servotracks contain a first servosignal and the even-numbered servotracks contain a second servosignal Sb which is phase opposition to the first servosignal. The servotracks ST103-ST113 and ST116-ST126 have a typical width W1 and form a group of two bands of N1 servotracks which are separated by a band of N2 servotracks ST114, ST115 having a typical width W2. The magnetic tape (310) is adapted to cooperate with an apparatus comprising eight magnetic write heads (H31-H38). The actuator is controlled in response to the servosignals read by the heads. The center-to-center distance (p) between the magnetic write heads (H31-H38) is equal to four times the typical width W1 and, moreover, it holds that: N2 = 2, 4, 6 etc. and W2=(k+1/2)W1 or N2 = 1, 3, 5 etc. and W2=2k.W1, where k = 1, 2 etc.
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2.发明公开APPARATUS FOR RECORDING AN INFORMATION SIGNAL ON A RECORD CARRIER PROVIDED WITH TRACKING SIGNALS AND A RECORD CARRIER HAVING SUCH INFORMATION SIGNALS 失效装置可用来记录信息信号与TRACK冲击信号的记录载体和记录介质这样的信息信号
公开(公告)号：EP0804792A1
公开(公告)日：1997-11-05
申请号：EP96935234.0
申请日：1996-11-11
CPC分类号： G11B21/081 , G11B5/5508 , G11B21/10 , G11B27/032 , G11B27/034 , G11B27/036 , G11B2220/20 , G11B2220/90
摘要： The invention thus relates to an apparatus for recording an information signal on a record carrier (1). The record carrier has a first and a second tracking signal (S1, S2) of specific frequencies and wavelengths (L) recorded in respective first and second tracks (T1, T2) running parallel to each other in their longitudinal direction on the record carrier. The apparatus is provided with means (30) for receiving the information signal, means (32) for converting the information signal into a channel signal, the channel signal comprising subsequent signal blocks (SBi) of information, each signal block comprising a portion of the information signal, means (34) for writing the channel signal in a third track (Ta) on the record carrier and reading at least one of the first and second tracking signals from said first and second tracks, generating means (38) for generating a control signal from the at least one of the first and second tracking signals read from the record carrier. The apparatus in accordance with the invention is adapted to record the information signal in the record carrier in such a way that the length of a signal block of the channel signal, when recorded in the third track, equals an integer number of the wavelength of said one of the first and the second tracking signals.
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3.发明公开
公开(公告)号：EP0801791A1
公开(公告)日：1997-10-22
申请号：EP96935201.0
申请日：1996-10-30
CPC分类号： G11B20/10009 , G11B5/09
摘要： A method and an apparatus are disclosed for recording a binary signal onto a magnetic record carrier (45). The binary signal is supplied to an input terminal (30). The apparatus comprise generators (38.1 to 38.4) for generating at least two write pulses (P1, P2) for each bit of the binary signal to be written. More specifically, the generators are adapted to (i) generate at least two write pulses of a third polarity (P1, P2) for the first bit of the first polarity in the first sequence, (ii) generating a write pulse of the third polarity and a write pulse of a fourth polarity (P3, P4) for the at least second bit of the first polarity occurring in the first sequence, the third polarity being opposite to the fourth polarity, (iii) generating at least two write pulses of the fourth polarity (P7, P8) for the first bit of the second polarity in the second sequence, (iv) generating a write pulse of the third polarity and a write pulse of the fourth polarity (P3', P4') for the at least second bit of the second polarity occurring in the second sequence.
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4.发明公开RECORDING AND REPRODUCING AN INFORMATION SIGNAL ON/FROM A LONGITUDINAL RECORD CARRIER PROVIDED WITH TRACKING SIGNALS 失效录制和播放的信息信号与跟踪信号/ LONGITUDIALEN记录媒体
公开(公告)号：EP0801792A1
公开(公告)日：1997-10-22
申请号：EP96933581.0
申请日：1996-10-25
CPC分类号： G11B5/584 , G11B15/087 , G11B27/3009
摘要： The invention thus relates to the identification of lead-in and lead-out portions of a longitudinal record carrier (2), using marks in the form of a modification of tracking signals (s1, s2) recorded in tracks (T1, T2). This identification is such that the frequencies of the tracking signals remain unchanged in the lead-in and the lead-out portion. Such modification results in the possibility to use the tracking signals in the lead-in and the lead-out portion to record an information signal even in a part of the lead-in and the lead-out portion. The modification may be realized by changing the duty cycle of the tracking signals.
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公开(公告)号：EP0803120A1
公开(公告)日：1997-10-29
申请号：EP96933586.0
申请日：1996-10-25
IPC分类号： G11B5
CPC分类号： G11B5/584 , G11B5/00817 , G11B5/4893 , G11B5/58 , G11B5/596 , G11B2005/0016
摘要： 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).
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公开(公告)号：EP0760998A1
公开(公告)日：1997-03-12
申请号：EP96903169.0
申请日：1996-03-11
CPC分类号： G11B5/3967 , G11B5/00817 , G11B5/2652 , G11B5/2654 , G11B5/29 , G11B5/3103 , G11B5/313 , G11B5/332 , G11B5/488 , G11B5/4886 , G11B5/4893 , G11B5/5508 , G11B5/58 , G11B5/584 , G11B5/596 , G11B5/59633
摘要： Write head, particularly a buried servowrite head provided with a head face (21) having a longitudinal direction (L) along which a magnetic recording medium can be relatively moved with respect to the magnetic head, and a width direction (W) oriented transversely to the longitudinal direction. In order to write signals simultaneously in various tracks the write head is provided with a structure having integrated, juxtaposed write units (25a; 25b) extending substantially transversely to the longitudinal direction and the width direction and each being provided with at least one write gap (27a; 27b). One write gap of the one write unit and one write gap of the other write unit of every two adjacent write units are situated in mutually different planes (P1; P2) which are oriented substantially transversely to the longitudinal direction.
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