Digital read channel for optical disk reader

G - Physics – 11 – B

Patent

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Details

G11B 20/10 (2006.01) G11B 7/005 (2006.01) G11B 7/09 (2006.01) G11B 7/14 (2006.01) G11B 20/14 (2006.01)

Patent

CA 2382538

The present invention provides digital read channel circuitry for an optical disk reader. An RF signal corresponding to a track on the optical disk is sampled to provide digital samples corresponding to the RF signal. The samples are taken at a rate that may differ from the channel bit rate of the RF signal. The digital samples are then processed to provide data at the channel bit rate. Multiple digital read channels may be used to read multiple tracks of an optical disk simultaneously. The multiple RF signals may be sampled based on a sample clock common to the multiple digital read channels.

La présente invention concerne un circuit à canal de lecture numérique pour lecteur de disque optique. Un signal RF correspondant à une piste du disque optique est échantillonné dans le but de produire des échantillons numériques correspondant au signal RF. Les échantillons sont recueillis à un débit pouvant être différent du débit binaire du canal. Des canaux de lecture numérique multiples peuvent être utilisés pour lire simultanément plusieurs pistes d'un disque optique. Les signaux RF multiples peuvent être échantillonnés sur la base d'une horloge d'échantillonnage commune aux canaux de lecture numérique multiples.

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