Title:
VEHICLE-MOUNTED COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/136742
Kind Code:
A1
Abstract:
Provided is a vehicle-mounted communication device capable of a reduction in an audio classification determination mis-classifying a voice sound as a non-voice sound, even in a noisy environment such as when mounted in a vehicle. The vehicle-mounted communication device (100) is provided with: a noise elimination filter (102) or a noise suppressor (103) for eliminating driving noise superimposed on an audio signal acquired by a microphone (101); a band energy ratio corrector (104) that corrects the band energy ratio that has been decreased thereby; and a variable bit rate encoder (105) for compressing the communication audio corrected by the band energy ratio corrector (104) for transmission to a communication partner via a communication line. As a result, since there is a reduction in the audio classifier (106) of the variable bit rate encoder (105) mis-classifying a voice sound as a non-voice sound, resulting in a voice sound being compressed in a mistaken non-voice-sound low-bitrate encoding, it is possible to provide communication audio in a vehicle-mounted environment to a communication partner at a high quality even in communication at a low average bit rate.
Inventors:
MOCHIKI NAOYA
Application Number:
PCT/JP2013/001495
Publication Date:
September 19, 2013
Filing Date:
March 08, 2013
Export Citation:
Assignee:
PANASONIC CORP (JP)
International Classes:
G10L21/034; H04M1/00; G10L25/93
Domestic Patent References:
| WO2009028023A1 | 2009-03-05 |
Foreign References:
| JP2011205389A | 2011-10-13 | |||
| JP2001318694A | 2001-11-16 | |||
| JP2005027273A | 2005-01-27 | |||
| JPH04230799A | 1992-08-19 | |||
| JPH11242499A | 1999-09-07 | |||
| JP2006276856A | 2006-10-12 |
Attorney, Agent or Firm:
WIN TECH PATENT OFFICE (JP)
Patent business corporation WIN tech (JP)
Patent business corporation WIN tech (JP)
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