JPWO2011118017A1 - 発信装置 - Google Patents
発信装置 Download PDFInfo
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- JPWO2011118017A1 JPWO2011118017A1 JP2010513542A JP2010513542A JPWO2011118017A1 JP WO2011118017 A1 JPWO2011118017 A1 JP WO2011118017A1 JP 2010513542 A JP2010513542 A JP 2010513542A JP 2010513542 A JP2010513542 A JP 2010513542A JP WO2011118017 A1 JPWO2011118017 A1 JP WO2011118017A1
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- 230000007613 environmental effect Effects 0.000 claims abstract description 67
- 230000005540 biological transmission Effects 0.000 claims abstract description 24
- 230000000873 masking effect Effects 0.000 claims abstract description 23
- 230000005236 sound signal Effects 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 239000000969 carrier Substances 0.000 claims description 4
- 210000005069 ears Anatomy 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000006870 function Effects 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 3
- 230000001413 cellular effect Effects 0.000 description 2
- 241000282412 Homo Species 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
- G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
- G10L19/093—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters using sinusoidal excitation models
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computational Linguistics (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Telephone Function (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
Access Memory)等からなる記憶装置を内蔵している。
Multiplexing)方式により変調波を生成している。
Fourier Transform)部104、ピーク周波数検出部107、搬送波生成部108、変調部115、D/A変換部120を備えている。
10 発信装置
11 PC本体
12 ディスプレイ
13 入力デバイス
15 スピーカー
16 マイクロフォン
20 携帯電話
21 マイクロフォン
22 ディスプレイ
103 A/D変換部
104 FFT部
107 ピーク周波数検出部
108 搬送波生成部
115 変調部
120 D/A変換部
203 A/D変換部
204 FFT部
210 環境音蓄積部
213 環境音減算部
215 復調部
Claims (5)
- 符号化された各種情報を可聴音帯域の音波に変換して発信する発信装置において、
前記音波が発信される場所の環境音を環境音信号として入力するマイクロフォンと、
前記環境音信号から、前記環境音を主として構成するピーク周波数を検出するピーク周波数検出部と、
前記ピーク周波数に基づいて、前記環境音に対してマスキング効果の得られる複数の周波数の搬送波を生成する搬送波生成部と、
前記複数の搬送波をベースバンド信号で変調する変調部と、
を備えることを特徴とする発信装置。 - 前記搬送波生成部は、前記ピーク周波数の1/n(nは自然数)を基本周波数として、この基本周波数の自然数倍の周波数の搬送波を生成し、
前記変調部は、OFDM方式により変調することを特徴とする請求項1記載の発信装置。 - 前記基本周波数は、前記ピーク周波数の1/n(nは自然数)の周波数のうち、30〜260Hzの周波数であることを特徴とする請求項1又は2記載の発信装置。
- 前記複数の搬送波は、前記ピーク周波数の自然数倍の周波数を含んでいることを特徴とする請求項1乃至3何れか1項に記載の発信装置。
- コンピュータに、符号化された各種情報を可聴音帯域の音波に変換してスピーカーから発信させるための発信プログラムにおいて、
マイクロフォンを介して入力される前記音波が発信される場所の環境音の信号から、前記環境音を主として構成するピーク周波数を検出するピーク周波数検出ステップと、
前記ピーク周波数に基づいて、前記環境音に対してマスキング効果の得られる複数の周波数の搬送波を生成する搬送波生成ステップと、
前記複数の搬送波をベースバンド信号で変調する変調ステップと、
を前記コンピュータに実行させることを特徴とする発信プログラム。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2010/055334 WO2011118017A1 (ja) | 2010-03-26 | 2010-03-26 | 発信装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP4545234B1 JP4545234B1 (ja) | 2010-09-15 |
JPWO2011118017A1 true JPWO2011118017A1 (ja) | 2013-07-04 |
Family
ID=42824820
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2010513542A Expired - Fee Related JP4545234B1 (ja) | 2010-03-26 | 2010-03-26 | 発信装置 |
Country Status (2)
Country | Link |
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JP (1) | JP4545234B1 (ja) |
WO (1) | WO2011118017A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5429826B2 (ja) * | 2011-12-28 | 2014-02-26 | 株式会社スポットライト | 超音波通信システム及びビーコン |
ES2633457T3 (es) * | 2012-12-28 | 2017-09-21 | Rakuten, Inc. | Sistema de comunicaciones de ondas de ultrasonidos |
JP6353402B2 (ja) * | 2015-05-12 | 2018-07-04 | 日本電信電話株式会社 | 音響電子透かしシステム、電子透かし埋め込み装置、電子透かし読み取り装置、その方法及びプログラム |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4398416B2 (ja) * | 2005-10-07 | 2010-01-13 | 株式会社エヌ・ティ・ティ・ドコモ | 変調装置、変調方法、復調装置、及び復調方法 |
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2010
- 2010-03-26 WO PCT/JP2010/055334 patent/WO2011118017A1/ja active Application Filing
- 2010-03-26 JP JP2010513542A patent/JP4545234B1/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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WO2011118017A1 (ja) | 2011-09-29 |
JP4545234B1 (ja) | 2010-09-15 |
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