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US 2003/0198153 A1Published application
Optical disc and apparatus for scanning the optical disc
AssigneeKoninklijke Philips Electronics N.V.
InventorGijsbert J. Van Den Enden
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AssigneeKoninklijke Philips Electronics N.V.
InventorGijsbert J. Van Den Enden
Estimating the term…
An optical disc is described for recording data, which disc has a recording area subdivided in coaxial annular zones comprising circular or spiral tracks. Each track within one of the zones is arranged for storing a same predetermined amount of data, and the first track of each zone stores an amount of data proportional to the radial position, resulting on average in a substantially constant density, the so called CLV (Constant Linear Velocity) density. The tracks comprise periodic characteristics, e.g. a wobble, which are radially aligned within each one of the zones, the periodicity being indicative of the track recording density for the track concerned. Hence the data recording and reading speed can be synchronised to the periodic characteristics, whereas any cross-talk of the periodic characteristics of neighbouring tracks is avoided.
Optical disc comprising a recording area for recording data at a substantially constant density,
Recording device for recording data at a substantially constant density on an optical disc comprising a recording area comprising circular or spiral tracks, which recording area is subdivided in a plurality of coaxial annular zones, which device comprises a recording head and recording control means,
Read device for reading data from an optical disc recorded at a substantially constant density, the optical disc comprising a recording area comprising circular or spiral tracks, which recording area is subdivided in a plurality of coaxial annular zones, which device comprises a reading head and read control means,
Dependencies are inferred from the claim text.