Appeal No. 95-0355
Application 08/022,561
claims are pending in the application.
The subject matter here claimed relates to a method for
reproducing main information data on a recording track
previously formed on an optical recording medium (e.g., a
magneto-optical disc) wherein the main information data is
contained in frames, wherein each frame has a predetermined
signal format including a frame sync signal format, and
wherein reproduce-only frame sync signals having the same
signal format as that of frame sync signals for the main
information data are previously recorded for each frame by
offsetting the recording track in a direction perpendicular to
the length direction of the track. Appealed claim 8, the only
independent claim on appeal, recites the steps of detecting
the offset of the recording track to produce a first signal
representative of the reproduce-only frame sync signals,
reproducing from the recording medium a second signal
corresponding to the main information data, and then using a
single demodulating and decoding circuit (53-55) to demodulate
and decode the detected first signal and the reproduced second
signal to reproduce the frame sync signals of the main
2
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