The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 24, 2011
Filed:
Nov. 25, 2009
Yuji Nagai, Sagamihara, JP;
Chosaku Noda, Yokohama, JP;
Kazuo Watabe, Yokohama, JP;
Akihito Ogawa, Fujisawa, JP;
Kazuto Kuroda, Yokohama, JP;
Nobuhisa Yoshida, Kamakura, JP;
Nobumasa Naito, Ome, JP;
Naoki Morishita, Yokohama, JP;
Naomasa Nakamura, Yokohama, JP;
Hideaki Ohsawa, Yokohama, JP;
Hiroharu Sato, Tokyo, JP;
Hisashi Yamada, Yokohama, JP;
Toshihiko Kaneshige, Yokohama, JP;
Yuji Nagai, Sagamihara, JP;
Chosaku Noda, Yokohama, JP;
Kazuo Watabe, Yokohama, JP;
Akihito Ogawa, Fujisawa, JP;
Kazuto Kuroda, Yokohama, JP;
Nobuhisa Yoshida, Kamakura, JP;
Nobumasa Naito, Ome, JP;
Naoki Morishita, Yokohama, JP;
Naomasa Nakamura, Yokohama, JP;
Hideaki Ohsawa, Yokohama, JP;
Hiroharu Sato, Tokyo, JP;
Hisashi Yamada, Yokohama, JP;
Toshihiko Kaneshige, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
According to one embodiment, a first encoder encodes main information, a second encoder encodes sub-information, a first modulator modulates a carrier based on an output of the first encoder, a duplicating module duplicates an output of the second encoder to generate encoded sub-information units, and a second modulator amplitude-modulates an output of the first modulator based on the encoded sub-information units. The second modulator amplitude-modulates with σ/(μ×(2)) being 0.4 or less, wherein a noise power of a transmission path or a storage medium is σ, a number of the encoded sub-information units is N, signal levels after amplitude modulation, which correspond to bitand bitof the encoded sub-information units, are A and B, and a level difference A−B is μ.