MODULATION DEVICE AND DEMODULATION DEVICE

Title:

MODULATION DEVICE AND DEMODULATION DEVICE

Document Type and Number:

WIPO Patent Application WO/2010/016589

Kind Code:

A1

Abstract:

A modulation device includes: a spread code generation unit which generates a spread code having a predetermined cycle; an acoustic signal input unit having an acoustic signal; a first modulation unit which phase-modulates the spread signal for each cycle according to the data code; and a synthesis unit which synthesizes the acoustic signal with a modulation signal which has been generated in accordance with the phase-modulated spread signal and distributed in a higher frequency region than a predetermined frequency and outputs the synthesis result as a synthesis signal.

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Inventors:

AKIYAMA HITOSHI
KOSEKI SHINYA
OKUYAMA FUKUTARO
SONE TAKURO
IWASE HIROYUKI

Application Number:

PCT/JP2009/064057

Publication Date:

February 11, 2010

Filing Date:

August 07, 2009

Export Citation:

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Assignee:

YAMAHA CORP (JP)
AKIYAMA HITOSHI
KOSEKI SHINYA
OKUYAMA FUKUTARO
SONE TAKURO
IWASE HIROYUKI

International Classes:

H04B1/707; H04B11/00

Foreign References:

JP2003506918A	2003-02-18
US20070064957A1	2007-03-22
JP2001148670A	2001-05-29
JP3752261B2	2006-03-08
JP2007088618A	2007-04-05
JP2007178675A	2007-07-12

Other References: