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Method of and apparatus for recording an information signal

  • US 4,901,300 A
  • Filed: 11/01/1988
  • Issued: 02/13/1990
  • Est. Priority Date: 01/22/1988
  • Status: Expired due to Term
First Claim
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1. A method of recording an information signal, in particular an EFM-modulated signal, on a record carrier, which information signal comprises time-code signals indicating the time positions of the associated signal portions within the information signal and which alternate with time-synchronisation signals, in which method a preformed servo track of the record carrier is scanned, an information pattern of recording marks, corresponding to the information signal, being recorded in the servo track and the servo-track portion intended for recording being provided with a periodic track modulation which can be distinguished from the information pattern, characterized in that said record carrier is of a type in which the frequency of the track modulation is modulated in conformity with a position-information signal, the position-information signal comprising position-code signals which indicate the positions of the associated track portions relative to the beginning of the servo track, which position-code signals alternate with position-synchronisation signals, and in that during recording of the information signals a fixed phase relationship is maintained between the time-synchronisation signals and the position-synchronisation signals represented by the track modulation of the track portions being scanned.

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