Koninklijke Philips Corporation N.v.

Johan C Talatra

Gijsbert Joseph Van Den Enden

Johannes H M Spruit

Johan P M G Linnartz

A record carrier has substantially parallel tracks having first variations of a first physical parameter and second variations of a second physical parameter of the track. The first variations represent information recorded on the record carrier, this information being recoverable by a controllable type of data processing. A modulation pattern of the second variations represents a code for controlling the type of data processing. In respect of a code track that includes the modulation pattern, the modulation pattern in the left neighboring track is aligned to the modulation pattern in the right neighboring track. Thereby crosstalk due to the second variations is decreased, and at least two tracks have the same modulation pattern. The playback device has a demodulator () and a control unit () for retrieving the code from at least two tracks.

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Eindhoven, Netherlands

Johan C Talatra