Title:
SPEECH ENVIRONMENT GENERATION METHOD, SPEECH ENVIRONMENT GENERATION DEVICE, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2021/245871
Kind Code:
A1
Abstract:
Provided is a technology for generating a speech environment that prevents persons other than a speaking person from hearing speech content in the case where a speaking voice is issued via speakers. The present invention includes: an acoustic signal generation step for, upon detection of a start signal of speech, generating an in-speech acoustic signal in which the sound volume of an acoustic signal played back during said speech is adjusted by using a prescribed volume value, where SP1, …, SPN represent speakers installed in an automobile, Fn(ω) represents a first filter coefficient used to generate an input signal to the speaker SPn, and ~Fn(ω) represents a second filter coefficient, which differs from the first filter coefficient, used to generate an input signal to the speaker SPn; a first local signal generation step for generating, by using the first filter coefficient Fn(ω), an audio signal Sn serving as an input signal to the speaker SPn from an audio signal of the speech; and a second local signal generation step for generating, by using the second filter coefficient ~Fn(ω), an acoustic signal An serving as an input signal to the speaker SPn from the in-speech acoustic signal.
Inventors:
KOBAYASHI KAZUNORI (JP)
SATO RYOTARO (JP)
SATO RYOTARO (JP)
Application Number:
PCT/JP2020/022081
Publication Date:
December 09, 2021
Filing Date:
June 04, 2020
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04R3/00; G10K15/00
Foreign References:
| JP2006339975A | 2006-12-14 | |||
| JP2006303721A | 2006-11-02 | |||
| JP2019075748A | 2019-05-16 | |||
| JPH08289389A | 1996-11-01 | |||
| JP2014176052A | 2014-09-22 | |||
| JP2004112528A | 2004-04-08 | |||
| JPH05191491A | 1993-07-30 |
Other References:
SUZUKI: "Instruction Manual", 12 May 2020, article "Smartphone-Link Navigation"
See also references of EP 4164244A4
See also references of EP 4164244A4
Attorney, Agent or Firm:
NAKAO, Naoki et al. (JP)
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