Method of reproducing information with equalization coefficient for the reproduced information
First Claim
1. A method for reproducing information recorded on a recording medium, comprising:
- irradiating a laser beam on a track of the recording medium to generate a reproducing signal; and
executing an equalization processing for reducing an inter-symbol interference;
wherein the equalization processing is changed during reproducing information recorded on the same recording medium, such that the smaller an amplitude of the reproducing signal, the greater an equalization coefficient that is applied.
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Accused Products
Abstract
A method of reproducing information by scanning information marks, disposed with a predetermined mark pitch therebetween and recorded on tracks inside a predetermined information recording region, by an optical spot. The method includes detecting the size of the optical change resulting from the information mark, calculating a plurality of equalization coefficients used for an equalization processing for the size of the optical change detected for each of the information marks, and reducing the inter-symbol interference on the basis of the equalization coefficients by the equalization processing. The equalization coefficient used for the equalization processing of the size of the optical change by a first information mark is greater than said equalization coefficient used for the equalization processing of the size of said optical change by a second information mark which is longer than the first information mark.
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Citations
21 Claims
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1. A method for reproducing information recorded on a recording medium, comprising:
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irradiating a laser beam on a track of the recording medium to generate a reproducing signal; and executing an equalization processing for reducing an inter-symbol interference; wherein the equalization processing is changed during reproducing information recorded on the same recording medium, such that the smaller an amplitude of the reproducing signal, the greater an equalization coefficient that is applied. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for reproducing information recorded on a recording medium, comprising:
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irradiating a laser beam on a track of the recording medium to generate a reproducing signal; and executing an equalization processing for reducing an inter-symbol interference; wherein an equalization coefficient applied in the equalization processing is serially changed throughout reproducing information from the same recording medium, such that the smaller an amplitude of the reproducing signal, the greater an equalization coefficient that is applied. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An apparatus for reproducing information recorded on a recording medium, comprising:
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a laser unit to irradiate a laser beam on a track of the recording medium to generate a reproducing signal; and an equalization unit to execute an equalization processing for reducing an inter-symbol interference; wherein an equalization coefficient applied in the equalization processing is serially changed throughout reproducing information from the same recording medium, such that the smaller an amplitude of the reproducing signal, the greater an equalization coefficient that is applied. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification