Patent ID: 8644119

Claim:
A record carrier comprising a servo track indicating an information track intended for recording information blocks, the servo track having a variation of a physical parameter, including a wobble configured to generate a wobble signal during scanning of the servo track, wherein the variation is modulated for encoding record carrier information, and wherein the servo track has: non-modulated parts having only said variations at a predetermined frequency, and modulated parts in which the frequency and/or phase of the variation deviates from the frequency and/or phase of the non-modulated parts for representing data bits of the record carrier information, wherein the data bits always start at a maximum or minimum amplitude of the wobble signal, wherein a first part of the modulated parts comprises a variation at a transition frequency, the length of the first part corresponding to m periods of the predetermined frequency and corresponding to n+0.5 periods of the transition frequency, n and m being integers.