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1. (WO1997017699) RECORDING AND REPRODUCING AN INFORMATION SIGNAL ON/FROM A LONGITUDINAL RECORD CARRIER PROVIDED WITH TRACKING SIGNALS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/017699 International Application No.: PCT/IB1996/001149
Publication Date: 15.05.1997 International Filing Date: 25.10.1996
IPC:
G11B 5/584 (2006.01) ,G11B 15/087 (2006.01) ,G11B 27/30 (2006.01)
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
15
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
02
Control of operating function, e.g. switching from recording to reproducing
05
by sensing features present on, or derived from, record carrier or container
087
by sensing recorded signals
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
27
Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
10
Indexing; Addressing; Timing or synchronising; Measuring tape travel
19
by using information detectable on the record carrier
28
by using information signals recorded by the same method as the main recording
30
on the same track as the main recording
Applicants:
PHILIPS ELECTRONICS N.V. [NL/NL]; Groenewoudseweg 1 NL-5621 BA Eindhoven, NL
PHILIPS NORDEN AB [SE/SE]; Kottbygatan 7, Kista S-164 85 Stockholm, SE (SE)
Inventors:
HOOGENDOORN, Abraham; NL
KALFS, Johannes, Jozef, Wilhelmus; NL
Agent:
VAN DER KRUK, Willem, L.; Internationaal Octrooibureau B.V. P.O. Box 220 NL-5600 AE Eindhoven, NL
Priority Data:
95203028.608.11.1995EP
Title (EN) RECORDING AND REPRODUCING AN INFORMATION SIGNAL ON/FROM A LONGITUDINAL RECORD CARRIER PROVIDED WITH TRACKING SIGNALS
(FR) ENREGISTREMENT ET REPRODUCTION D'UN SIGNAL D'INFORMATION SUR UN SUPPORT D'ENREGISTREMENT LONGITUDINAL MUNI DE SIGNAUX DE CENTRAGE
Abstract:
(EN) 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.
(FR) Identification des régions d'entrée et de sortie d'un support d'enregistrement longitudinal (2), utilisant des marques sous la forme d'une modification des signaux de centrage (s1, s2) enregistrés dans les pistes (T1, T2). Cette identification se fait de telle sorte que les fréquences des signaux de centrage restent inchangées dans la région d'entrée et la région de sortie. La modification permet d'utiliser les signaux de centrage de la région d'entrée et de la région de sortie pour enregistrer un signal d'information même dans une partie de la région d'entrée et de la région de sortie. La modification peut être effectuée par la variation du cycle d'utilisation des signaux de centrage.
Designated States: CN, JP, KR, NO, SG, TR, VN
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
NO19973146TR97/00595SG43635VN3168EP0801792JPH10512704
CN1177414KR1019980701249ID015.151MYPI 96004630VN3168