Optical disk reproducing apparatus having a cosine equalizer with boosted frequency characteristics
AssigneeSony Corporation
InventorEiji Kumagai
Life of this patent
Estimating the term…
Abstract
An optical disk apparatus has an optical pickup, a cosine equalizer having frequency characteristics including a boosting frequency for a frequency component which has a frequency that is about twice the frequency of an RF signal reproduced from recorded data with a shortest data length, and a digital signal processor for generating recorded data from the RF signal. Irrespective to the type of reproduced data from the optical pickup, the optical disk apparatus greatly increases the quality of the reproduced data as information transfer accuracy as compared with a conventional disk optical system.
Claims7
An optical disk apparatus comprising:
- an optical pickup for reproducing an RF signal from an optical recording medium on which modulated data generated by modulating information data by a modulation process with a prescribed shortest data length are recorded;
- a cosine equalizer having frequency characteristics including a central boosting frequency which is about twice the frequency of the RF signal reproduced from the recorded data with the shortest data length, for thereby equalizing a waveform of the RF signal;
- and
- modulated data generating means connected to said cosine equalizer for generating the modulated data from said RF signal.
Dependencies are inferred from the claim text.