Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Control of information signal processing channel
Reexamination Certificate
2005-09-13
2005-09-13
Patel, Gautam R. (Department: 2655)
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Control of information signal processing channel
C369S053330, C369S059150, C369S124130, C375S232000
Reexamination Certificate
active
06944105
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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J. Opt. Soc. Am., vol. 69, No. 1, Jan. (1979), pp. 4-24.
Sukeda Hirofumi
Wakabayashi Kouichirou
Antonelli, Terry Stout and Kraus, LLP.
Hitachi , Ltd.
Patel Gautam R.
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