Signal processing system and information storage medium

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, a...

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Bibliographische Detailangaben
Hauptverfasser:	WATABE KAZUO, OHSAWA HIDEAKI, NODA CHOSAKU, NAITO NOBUMASA, YOSHIDA NOBUHISA, NAGAI YUJI, MORISHITA NAOKI, OGAWA AKIHITO, NAKAMURA NAOMASA, SATO HIROHARU, KANESHIGE TOSHIHIKO, KURODA KAZUTO, YAMADA HISASHI
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY CALCULATING COMPUTING COUNTING ELECTRICITY HANDLING RECORD CARRIERS INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER MODULATION PHYSICS PRESENTATION OF DATA RECOGNITION OF DATA RECORD CARRIERS
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Beschreibung
Zusammenfassung:	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 /(μ×(2N)1/2) being 0.4 or less, wherein a noise power of a transmission path or a storage medium is 2, a number of the encoded sub-information units is N, signal levels after amplitude modulation, which correspond to bit 1 and bit 0 of the encoded sub-information units, are A and B, and a level difference A−B is μ.