Title:
音響通信システム、音響送信装置、音響受信装置、プログラムおよび音電子透かしの埋込強度設定方法
Document Type and Number:
Japanese Patent JP7417478
Kind Code:
B2
Abstract:
To provide an acoustic communication system, an acoustic transmission apparatus, an acoustic reception apparatus, a program, and a method for setting an embedding strength of acoustic digital watermarking, capable of embedding embedded information with appropriate sound intensity in an acoustic signal, in acoustic digital watermarking technique.SOLUTION: An acoustic transmission apparatus 20 includes: a sound emission processing unit 28 that emits from a speaker 12 an acoustic signal AS that is embedded in an original sound signal with different sound intensities and to which a plurality of embedded information SC including sound intensity information AD indicating the respective sound intensities are embedded; a sound intensity adjustment unit 24 that adjusts the sound intensity for embedding the embedded information to the original sound signal; and an embedding unit 27 that embeds the embedded information to the original sound signal with the adjusted sound intensity. An acoustic reception apparatus 30 includes: an extraction unit 33 that extracts the embedded information from an acoustic signal sound collected by a microphone 31; and an output unit that outputs the sound intensity information included the embedded information extracted by the extraction unit 33. The sound intensity adjustment unit 24 adjusts the sound intensity on the basis of the sound intensity information output by the output unit.SELECTED DRAWING: Figure 4
Inventors:
Mitsuhiro Sakagami
Higashi Kei
Higashi Kei
Application Number:
JP2020104836A
Publication Date:
January 18, 2024
Filing Date:
June 17, 2020
Export Citation:
Assignee:
toa corporation
International Classes:
H04M11/00; G10L19/018; H04B11/00
Domestic Patent References:
| JP2010085737A | ||||
| JP2010087591A | ||||
| JP2020068403A | ||||
| JP2020053945A | ||||
| JP2011211603A |
Foreign References:
| US20160295279 |
Attorney, Agent or Firm:
Tetsuya Hamana