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    • 3. 发明申请
    • EFFICIENT NEAR-FIELD COMMUNICATION BASED ON AUDIO SIGNALS
    • WO2019114950A1
    • 2019-06-20
    • PCT/EP2017/082646
    • 2017-12-13
    • SONOBEACON GMBH
    • THORALF, NehlsWACKERBAUER, PeterMASCHEK, Hubertus
    • H04H20/31H04B11/00
    • H04H20/31H04B11/00H04H2201/50
    • The present disclosure describes an efficient computer-implemented near-field communication system and method based on broadcasting audio signals for dynamically providing context-related additional content to a mobile device. In embodiments of the present invention, the additional content is mapped to specific audio watermarks and/or triggering commands which are encoded together into a digital signal. Based on continuously scanning the received background noise, an exactly defined frequency range and volume is dynamically selected for broadcasting the signal. Hence, the encoded digital signal is further modulated into an audio signal in the exactly defined frequency range. In embodiments of the present invention, the selected exactly defined frequency range for transmitting the audio signal may preferably be located in the ultrasound and/or infrasound frequency range. In case of transmitting infrasound signals, gyrosensors of the mobile device may be employed as audio signal receivers in embodiments of the present invention. Moreover, in further embodiments of the present invention, audio signal receiver of a mobile device such as gyrosensors or microphones may be switched on by transmitting a command via a wireless network such as Wifi or Bluetooth. Also the information about the selected frequency range and volume for broadcasting the audio signal may be provided to the mobile device via a wireless network in embodiments of the present invention. In response, an audio signal receiver of the mobile device may be tuned to the selected frequency range. The received audio signal is further processed on the mobile device so that the context-related additional content may be displayed and/or rendered.
    • 4. 发明申请
    • 音響信号出力システム
    • 声音信号输出系统
    • WO2014207798A1
    • 2014-12-31
    • PCT/JP2013/067213
    • 2013-06-24
    • 有限会社ゆず
    • 松下 恵進羽鳥 文子田村 抄子
    • G06F13/00H04H20/31H04H20/61
    • H04H20/31H04H60/64H04H2201/37
    •  前もって音響信号の作成や重畳作業、音響信号出力装置の識別情報の再設定といった煩雑な作業を無くし、重畳対象音源の放音時刻が変動した際にも対応可能である音響信号出力システムを提供すること。 音響信号出力装置1と、携帯端末4と、識別情報サーバ5と、を備え、 前記音響信号出力装置1は、出力する識別情報を変更可能な操作手段3と、識別情報を音響信号に変換する変換部11と、音響信号と放送音源を重畳する重畳部10と、を備え、 前記携帯端末4は、集音部41と、集音した重畳音源から音響信号を抽出する抽出部42と、抽出された音響信号から識別情報を復元する復元部43と、復元された識別情報を識別情報サーバに送信する識別情報送信部44と、を備え、 前記識別情報サーバ5は、識別情報とコンテンツを対応させたデータベース部53と、前記携帯端末から送信された識別情報と対応したコンテンツを導出する照合部52と、照合部から導出されたコンテンツを前記携帯端末へ送信するコンテンツ送信部54と、を備えていることを特徴とする。
    • 本发明提供了一种声信号输出系统,用于分配预先创建和叠加声信号的麻烦的工作,并且重新设置声信号输出装置的识别信息,并能够响应一天中的时间变化 发出重叠的声源。 本发明的特征在于设置有声信号输出装置(1),便携式终端(4)和识别信息服务器(5),声信号输出装置(1)具有操作装置 )能够改变要输出的识别信息,用于将识别信息转换为声信号的转换单元(11)和用于叠加声信号和广播声源的叠加单元(10) 便携式终端(4)设有声音收集单元(41),提取单元(42),用于从所收集的重叠声源中提取声音信号;恢复单元(43),用于从所提取的声音中恢复识别信息 信号,以及用于将恢复的识别信息发送到识别信息服务器的识别信息传输单元(44) 所述识别信息服务器(5)具有数据库单元(53),其中所述识别信息和内容相互关联;对照单元(52),用于导出从所述便携式终端发送的所述识别信息和相应的内容; 以及用于将由对照单元导出的内容发送到便携式终端的内容传输单元(54)。
    • 8. 发明申请
    • AUXILIARY CHANNEL MASKING IN AN AUDIO SIGNAL
    • AUXILIARY CHANNEL MASKING IN AUDIO SIGNAL
    • WO0229808A3
    • 2002-09-06
    • PCT/US0131214
    • 2001-10-05
    • UNIV MIAMI
    • ILIEV ALEXANDER ISCORDILIS MICHAEL S
    • G10L11/00C02F1/28C02F1/42C02F1/463C02F1/48C02F1/66G10L19/00G11B20/00H04H20/31H04H1/00
    • H04H20/31C02F1/283C02F1/42C02F1/463C02F1/48C02F1/66C02F2101/20C02F2103/10G10L19/018G11B20/00086G11B20/00891
    • A method is provided for embedding data into an audio signal and determing data embedded into an audio signal. In the method for embedding data into an audio signal, the audio signal is based on a first set of data and includes a phase component. The method modifies at least a portion of the phase component of the audio signal to embed a second set of data into the audio signal. The modified audio signal can be made to differ with respect to the audio signal in a manner at least one of (i) substantially imperceptible and (ii) imperceptible to a listener of the first set of data depending on the extent that the phase component of the audio signal is modified. In the method for determining data embedded into an audio signal, the audio signal is based on a first set of data of an original audio signal and includes a phase component. The method determines a second set of data embedded into the audio signal based on the phase component of the audio signal. The audio signal differs with respect to the original audio signal in a manner that is at least one of (i) substantially imperceptible and (ii) imperceptible to a listener of the first set of data.
    • 提供了一种用于将数据嵌入音频信号并确定嵌入到音频信号中的数据的方法。 在将数据嵌入音频信号的方法中,音频信号基于第一组数据并且包括相位分量。 该方法修改音频信号的相位分量的至少一部分以将第二组数据嵌入到音频信号中。 修改后的音频信号可以以下述至少一种方式相对于音频信号而不同:(i)基本上不可察觉的和(ii)第一组数据的收听者不可察觉的取决于第一组数据的收听者的程度, 音频信号被修改。 在用于确定嵌入到音频信号中的数据的方法中,音频信号基于原始音频信号的第一组数据,并且包括相位分量。 该方法基于音频信号的相位分量来确定嵌入到音频信号中的第二组数据。 音频信号相对于原始音频信号的不同之处在于(i)基本上不可察觉的和(ii)第一组数据的收听者不能察觉的至少之一。
    • 10. 发明申请
    • SYSTEM AND METHOD FOR ADDING AN INAUDIBLE CODE TO AN AUDIO SIGNAL AND METHOD AND APPARATUS FOR READING A CODE SIGNAL FROM AN AUDIO SIGNAL
    • 用于向音频信号添加不可用代码的系统和方法以及用于从音频信号读取代码信号的方法和装置
    • WO0178271A3
    • 2002-07-04
    • PCT/US0110790
    • 2001-04-03
    • NIELSEN MEDIA RES INC
    • SRINIVASAN VENUGOPAL
    • G10L19/02G10L11/00H03M7/30H04H20/31H04H1/00H04H9/00
    • H04H20/31
    • An encoder includes a sampler that samples an audio signal and that generates from the samples a plurality of short blocks of sampled audio. Each of the short blocks has a duration less than a minimum audibly perceivable signal delay. A processor combines the plurality of short blocks into a long block. The long block is transformed into a frequency domain signal having a plurality of independently modulatable frequency indices. The frequency difference between adjacent indices is determined by the minimum duration and the sampling rate of the sampler. A neighborhood of frequency indices is selected so that the frequency difference between a lowest index and a highest index within the neighborhood is less than a predetermined value. Two or more of the indices are modulated in the neighborhood so as to make a selected one of the indices an extremum while keeping the total energy of the neighborhood constant. A plurality of frequency bands are so coded. A decoder decides that a bit or bits have been received if, in a majority of the frequency bands, the decoder detects a modulated index.
    • 编码器包括采样器,其对音频信号进行采样,并且从样本生成多个采样音频的短块。 每个短块具有小于最小可听见的信号延迟的持续时间。 处理器将多个短块组合成长块。 将长块变换成具有多个可独立调制的频率索引的频域信号。 相邻索引之间的频率差由采样器的最小持续时间和采样率决定。 选择频率附加区域,使得邻域内的最低索引和最高索引之间的频率差小于预定值。 在附近调制两个或更多个索引,以便使所选索引中的一个索引成为极值,同时保持邻域的总能量恒定。 多个频带被这样编码。 如果在多数频带中,解码器检测到调制的索引,则解码器判定已经接收到位。