Information reproducing apparatus
AssigneeSamsung Electronics Co., Ltd.
InventorsTakao Sugawara, Jun Lee
Life of this patent
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Abstract
An information reproducing apparatus which reproduces information recorded on a medium includes an asymmetry correction circuit configured to correct an asymmetry of a signal read from a medium. The apparatus also includes a first high pass filter installed before the asymmetry correction circuit and configured to remove noise in the signal by a first cut-off frequency. The apparatus also includes a second high pass filter installed after the asymmetry correction circuit and configured to remove the noise in the signal by a second cut-off frequency, wherein the second cut-off frequency is higher than the first cut-off frequency.
Claims12
An information reproducing apparatus which reproduces information recorded on a medium, the apparatus comprising:
- a first high pass filter configured to remove noise by a first cut-off frequency in a signal read from a medium;
- an asymmetry correction circuit configured to correct an asymmetry of the signal filtered by the first high pass filter;
- and
- a second high pass filter installed after the asymmetry correction circuit and configured to remove a thermal noise by a second cut-off frequency in the signal corrected by the asymmetry correction circuit, wherein the second cut-off frequency is higher than the first cut-off frequency.
An information reproducing apparatus which reproduces information recorded on a medium, the apparatus comprising:
- an asymmetry correction circuit configured to correct an asymmetry of a signal read from a medium and filtered by a first high pass filter;
- and
- a second high pass filter configured to receive the corrected signal from the asymmetry correction circuit and to remove a noise in the corrected read signal using a predetermined cut-off frequency that is higher than a cut-off frequency of the first high pass filter.
An information reproducing apparatus for retrieving information from a recording medium, the apparatus comprising:
- a first high pass filter configured to receive a signal read from the recording medium by a head unit, the first high pass filter removing a DC component from the read signal using a first cut-off frequency;
- an asymmetry correction circuit configured to receive the signal filtered by the first high pass filter and to correct an asymmetry of the filtered signal;
- and
- a second high pass filter configured to receive the corrected signal from the asymmetry correction circuit and to remove thermal noise in the corrected signal using a second cut-off frequency higher than the first cut-off frequency.
Dependencies are inferred from the claim text.