Title:
COMMUNICATION SYSTEM, RECEPTION DEVICE, AND COMMUNICATION METHOD
Document Type and Number:
WIPO Patent Application WO/2012/066738
Kind Code:
A1
Abstract:
The present invention provides a communication system that is able to appropriately eliminate infrared noise from an external device in a system that transmits/receives a broadband audio signal. The communication system (1) is provided with a speaker device (3) and a wireless microphone (2) for transmitting/receiving a broadband audio signal including a frequency band that is higher than the voice band. When a broadband audio signal is input into the wireless microphone (2), the wireless microphone (2) performs balanced modulation processing that reverses the high and low frequencies of the audio signal, and transmits the audio signal having reversed frequencies. When the speaker device (3) receives the audio signal transmitted from the wireless microphone (2), the speaker device (3) cuts, from within the audio received audio signal, the frequency component of the frequency band (infrared noise band) of the infrared noise arising from an external device, performs an inverse balanced modulation processing that re-reverses the high and low frequencies of the audio signal from which the infrared noise band frequency component has been cut, and outputs the audio signal having re-reversed high and low frequencies.
Inventors:
KAWASAKI YUJI
YAMAHAI KEIJI
SUZUKI AKIRA
YAMAHAI KEIJI
SUZUKI AKIRA
Application Number:
PCT/JP2011/006152
Publication Date:
May 24, 2012
Filing Date:
November 02, 2011
Export Citation:
Assignee:
PANASONIC CORP (JP)
KAWASAKI YUJI
YAMAHAI KEIJI
SUZUKI AKIRA
KAWASAKI YUJI
YAMAHAI KEIJI
SUZUKI AKIRA
International Classes:
H04B14/00; H04B1/10; H04R1/06
Foreign References:
JP2005006261A | 2005-01-06 | |||
JPH1022923A | 1998-01-23 | |||
JP2005236415A | 2005-09-02 | |||
JPH0392020A | 1991-04-17 | |||
JPS6377233A | 1988-04-07 | |||
JP2009171461A | 2009-07-30 | |||
JP2009135709A | 2009-06-18 |
Attorney, Agent or Firm:
OHNO, Seiji et al. (JP)
Seiji Ono (JP)
Seiji Ono (JP)
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Claims: