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Patent Searching and Data


Title:
MODULATION DEVICE, DEMODULATION DEVICE, SOUND TRANSMISSION SYSTEM, PROGRAM, AND DEMODULATION METHOD
Document Type and Number:
WIPO Patent Application WO/2014/129370
Kind Code:
A1
Abstract:
The present invention addresses the problem of enhancing the possibility of extracting data from sound that is transmitted from a system that transmits the data utilizing the sound as a transmission medium. When frames are transmitted using multiple frequency bands with the transmission timing being shifted with respect to one another, not only resistance to multipath fading, noise contamination, and the like can be achieved, but the transmission rate can also be expected to be substantially improved over a situation where one frame is transmitted using only one frequency band. Furthermore, when selecting blocks that constitute a frame, the blocks are selected in accordance with the condition that the time required for collecting sound on which the blocks to be selected are superimposed become shorter. Consequently, even in the event of a substantial drop in the data transmission rate, the rate drop can be suppressed.

Inventors:
MORIGUCHI SHOTA (JP)
Application Number:
PCT/JP2014/053266
Publication Date:
August 28, 2014
Filing Date:
February 13, 2014
Export Citation:
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Assignee:
YAMAHA CORP (JP)
International Classes:
H04J1/00; H04B11/00; H04L27/28; H04L27/30
Foreign References:
US20010006535A12001-07-05
JP2004297142A2004-10-21
JPH06164555A1994-06-10
JP2002300097A2002-10-11
US20090067292A12009-03-12
JPH03229523A1991-10-11
US6205127B12001-03-20
JP2010288246A2010-12-24
JP2006251676A2006-09-21
Other References:
See also references of EP 2849365A4
Attorney, Agent or Firm:
HONDA HIRONORI (JP)
Hironori Honda (JP)
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