G - Physics – 11 – B
Patent
G - Physics
11
B
352/21.1
G11B 5/58 (2006.01) G11B 5/09 (2006.01) G11B 15/46 (2006.01) G11B 20/14 (2006.01) G11B 21/10 (2006.01)
Patent
CA 1213039
24 ABSTRACT: Method of recording a digital information signal on a record carrier, record carrier provided with such an information signal and read/write apparatus for such a record carrier. The invention relates to a method of recording a digital information signal on a record carrier. For a controlled positioning of the read element relative to the track to be read during the read-out of such a record carrier low-frequency tracking signals may be recorded in the tracks. Instead of adding separate tracking signals to the information signal, steps are taken, in accordance with the invention, that these tracking signals are represented by the d.c. content. During conversion of the information words of the information signal into channel words steps are therefore taken to provide to channel words whose d.c. content is equal but opposite for each information word. The choice between these two channel words is made depen- ding on a control signal which depends on the desired tracking signal.
436751
de Niet Edmond
Hofelt Martijn H.h.
Rijckaert Albert M.a.
N.v.philips'gloeilampenfabrieken
Van Steinburg C.e.
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