Thomson-Csf

Claude Lehureau

Jean-Louis Gerard

Marc Loret

Process for generating synchronizing signals used for writing and/or reading recorded digital data or recording on an optical data carrier, in which the synchronizing signals are obtained from basic clock signals regenerated in phase with the aid of the determination of the phase shift of a specific pulse relative to the clock signal. According to a preferred variant, the specific data and the useful information data are coded according to the NRZ code. The specific data are associated with pulse times not used in the NRZ code for the recording of the information data. The synchronizing signals generated on the basis of the reading of these flags can then be used for writing during the information data recording phases.

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Paris, France

Claude Lehureau