Abstract: The present invention relates to a device for manufacturing a master disc for mastering data on an optical record carrier. To achieve reduced jitter levels resulting from pit widths that are too large, which might result in cross talk effects during read out or even cross write effects during mastering, the application of a pulsed write strategy for manufacturing the master disc is proposed, wherein the pits are recorded by a sequence of a predetermined number of write pulses, said sequence including a number of write pulses having a light intensity of substantially zero.

Abstract: A record carrier is for recording information by writing marks in a track on a recording layer. The shortest mark used for recording the information has a length of a predefined minimum number d of channel bit lengths. The record carrier (11) has a pregroove that is modulated by a carrier pattern containing focus marks (18,19) that provides a focus area (12) at a predefined location on the recording layer. The focus marks have lengths of at least two times the length of the shortest mark for being substantially longer than the effective diameter of the scanning spot. A scanning device locates the focus area and determines the best focus offset by detecting the maximum read signal amplitude while scanning the carrier pattern.

Abstract: The present invention relates to a method of determining write parameters for recording information on a record carrier, said information being in the form of a multidimensional channel data stream to be recorded as a channel band of at least two symbol rows one-dimensionally evolving along a first direction and aligned with each other along a second direction.