Acoustic echo suppression unit and conferencing front-end
    2.
    发明授权
    Acoustic echo suppression unit and conferencing front-end 有权
    声回声抑制单元和会议前端

    公开(公告)号:US08873764B2

    公开(公告)日:2014-10-28

    申请号:US13272243

    申请日:2011-10-13

    IPC分类号: H04B3/20 H04M9/08

    摘要: An acoustic echo suppression unit according to an embodiment of the present invention includes and input interface for extracting a downmix signal from an input signal, the input signal including the downmix signal and parametric side information, wherein the downmix and the parametric side information together represent a multichannel signal, a calculator for calculating filter coefficients for an adaptive filter, wherein the calculator is adapted to determine the filter coefficients based on the downmix signal and a microphone signal or a signal derived from the microphone signal, and an adaptive filter adapted to filter the microphone signal or the signal derived from the microphone signal based on the filter coefficients to suppress an echo caused by the multichannel signal in the microphone signal.

    摘要翻译: 根据本发明实施例的声学回声抑制单元包括用于从输入信号中提取降混信号的输入接口,该输入信号包括下混合信号和参数侧信息,其中下混合和参数侧信息一起表示一个 多通道信号,用于计算自适应滤波器的滤波器系数的计算器,其中所述计算器适于基于所述下混合信号和麦克风信号或从所述麦克风信号导出的信号来确定滤波器系数,以及自适应滤波器, 麦克风信号或基于滤波器系数从麦克风信号导出的信号,以抑制由麦克风信号中的多声道信号引起的回波。

    APPARATUS FOR GENERATING AN ENHANCED DOWNMIX SIGNAL, METHOD FOR GENERATING AN ENHANCED DOWNMIX SIGNAL AND COMPUTER PROGRAM
    3.
    发明申请
    APPARATUS FOR GENERATING AN ENHANCED DOWNMIX SIGNAL, METHOD FOR GENERATING AN ENHANCED DOWNMIX SIGNAL AND COMPUTER PROGRAM 有权
    用于产生增强的下行信号的装置,用于产生增强的下行信号和计算机程序的方法

    公开(公告)号:US20130216047A1

    公开(公告)日:2013-08-22

    申请号:US13592977

    申请日:2012-08-23

    IPC分类号: H04R5/00

    摘要: An apparatus for generating an enhanced downmix signal on the basis of a multi-channel microphone signal has a spatial analyzer configured to compute a set of spatial cue parameters having a direction information describing a direction-of-arrival of a direct sound, a direct sound power information and a diffuse sound power information on the basis of the multi-channel microphone signal. The apparatus also has a filter calculator for calculating enhancement filter parameters in dependence on the direction information describing the direction-of-arrival of the direct sound, in dependence on the direct sound power information and in dependence on the diffuse sound power information. The apparatus also has a filter for filtering the microphone signal, or a signal derived therefrom, using the enhancement filter parameters, to obtain the enhanced downmix signal.

    摘要翻译: 一种用于基于多通道麦克风信号产生增强的下混合信号的装置具有空间分析器,该空间分析器被配置为计算具有描述直接声音到达方向的方向信息的一组空间提示参数,直接声音 功率信息和基于多声道麦克风信号的漫射声功率信息。 该装置还具有滤波器计算器,用于根据直接声功率信息和依赖于扩散声功率信息,根据描述直接声音到达方向的方向信息来计算增强滤波器参数。 该装置还具有用于使用增强滤波器参数对麦克风信号进行滤波的滤波器或从其导出的信号,以获得增强的降混信号。

    ACOUSTIC ECHO SUPPRESSION UNIT AND CONFERENCING FRONT-END
    4.
    发明申请
    ACOUSTIC ECHO SUPPRESSION UNIT AND CONFERENCING FRONT-END 有权
    声控ECHO抑制单元和会议前端

    公开(公告)号:US20120076308A1

    公开(公告)日:2012-03-29

    申请号:US13272243

    申请日:2011-10-13

    IPC分类号: H04R5/00 H04B3/20

    摘要: An acoustic echo suppression unit according to an embodiment of the present invention includes and input interface for extracting a downmix signal from an input signal, the input signal including the downmix signal and parametric side information, wherein the downmix and the parametric side information together represent a multichannel signal, a calculator for calculating filter coefficients for an adaptive filter, wherein the calculator is adapted to determine the filter coefficients based on the downmix signal and a microphone signal or a signal derived from the microphone signal, and an adaptive filter adapted to filter the microphone signal or the signal derived from the microphone signal based on the filter coefficients to suppress an echo caused by the multichannel signal in the microphone signal.

    摘要翻译: 根据本发明实施例的声学回声抑制单元包括用于从输入信号中提取降混信号的输入接口,该输入信号包括下混合信号和参数侧信息,其中下混合和参数侧信息一起表示一个 多通道信号,用于计算自适应滤波器的滤波器系数的计算器,其中所述计算器适于基于所述下混合信号和麦克风信号或从所述麦克风信号导出的信号来确定滤波器系数,以及自适应滤波器, 麦克风信号或基于滤波器系数从麦克风信号导出的信号,以抑制由麦克风信号中的多声道信号引起的回波。

    Apparatus and method for computing filter coefficients for echo suppression
    5.
    发明授权
    Apparatus and method for computing filter coefficients for echo suppression 有权
    用于计算用于回波抑制的滤波器系数的装置和方法

    公开(公告)号:US08462958B2

    公开(公告)日:2013-06-11

    申请号:US12864890

    申请日:2009-01-16

    IPC分类号: H04B3/20

    摘要: A preferred embodiment of an apparatus for computing filter coefficients for an adaptive filter for filtering a microphone signal so as to suppress an echo due to a loudspeaker signal includes an extractor for extracting a stationary component signal or a non-stationary component signal from the loudspeaker signal or from a signal derived from the loudspeaker signal, and a computer for computing the filter coefficients for the adaptive filter on the basis of the extracted stationary component signal or the extracted non-stationary component signal.

    摘要翻译: 用于计算用于滤波麦克风信号的滤波器系数的滤波器系数的装置的优选实施例,以便抑制由于扬声器信号引起的回波,包括用于从扬声器信号中提取静止分量信号或非平稳分量信号的提取器 或者根据从扬声器信号得到的信号,以及计算机,用于基于所提取的固定分量信号或所提取的非平稳分量信号来计算用于自适应滤波器的滤波器系数。

    APPARATUS FOR DETERMINING A CONVERTED SPATIAL AUDIO SIGNAL
    6.
    发明申请
    APPARATUS FOR DETERMINING A CONVERTED SPATIAL AUDIO SIGNAL 有权
    用于确定转换空间音频信号的装置

    公开(公告)号:US20110222694A1

    公开(公告)日:2011-09-15

    申请号:US13026012

    申请日:2011-02-11

    IPC分类号: H04R5/00

    摘要: An apparatus for determining a converted spatial audio signal, the converted spatial audio signal having an omnidirectional audio component and at least one directional audio component, from an input spatial audio signal, the input spatial audio signal having an input audio representation and an input direction of arrival. The apparatus has an estimator for estimating a wave representation having a wave field measure and a wave direction of arrival measure based on the input audio representation and the input direction of arrival. The apparatus further has a processor for processing the wave field measure and the wave direction of arrival measure to obtain the omnidirectional audio component and the at least one directional component.

    摘要翻译: 一种用于从输入的空间音频信号确定转换的空间音频信号的装置,所转换的空间音频信号具有全向音频分量和至少一个定向音频分量,所述输入空间音频信号具有输入音频表示和输入方向 到达。 该装置具有估计器,用于基于输入的音频表示和输入的到达方向来估计具有波场测量值和波形到达度量的波形表示。 该装置还具有用于处理波场测量和波浪到达方向测量的处理器,以获得全向音频分量和至少一个方向分量。

    APPARATUS AND METHOD FOR COMPUTING CONTROL INFORMATION FOR AN ECHO SUPPRESSION FILTER AND APPARATUS AND METHOD FOR COMPUTING A DELAY VALUE
    7.
    发明申请
    APPARATUS AND METHOD FOR COMPUTING CONTROL INFORMATION FOR AN ECHO SUPPRESSION FILTER AND APPARATUS AND METHOD FOR COMPUTING A DELAY VALUE 有权
    用于计算ECHO抑制过滤器的控制信息的装置和方法以及计算延迟值的装置和方法

    公开(公告)号:US20110044461A1

    公开(公告)日:2011-02-24

    申请号:US12864240

    申请日:2009-01-12

    IPC分类号: H04B3/20 H03G3/00

    CPC分类号: H04M9/082

    摘要: An embodiment of an apparatus for computing control information for a suppression filter for filtering a second audio signal to suppress an echo based on a first audio signal includes a computer having a value determiner for determining at least one energy-related value for a band-pass signal of at least two temporally successive data blocks of at least one signal of a group of signals. The computer further includes a mean value determiner for determining at least one mean value of the at least one determined energy-related value for the band-pass signal. The computer further includes a modifier for modifying the at least one energy-related value for the band-pass signal on the basis of the determined mean value for the band-pass signal. The computer further includes a control information computer for computing the control information for the suppression filter on the basis of the at least one modified energy-related value.

    摘要翻译: 用于计算用于滤波第二音频信号以抑制基于第一音频信号的回波的抑制滤波器的控制信息的装置的实施例包括具有用于确定带通的至少一个能量相关值的值确定器的计算机 一组信号的至少一个信号的至少两个时间上连续的数据块的信号。 该计算机还包括一个平均值确定器,用于确定该带通信号的至少一个确定的能量相关值的至少一个平均值。 该计算机还包括修改器,用于基于确定的带通信号的平均值修改带通信号的至少一个能量相关值。 计算机还包括控制信息计算机,用于基于至少一个修改的能量相关值来计算抑制滤波器的控制信息。

    Audio format transcoder
    9.
    发明授权
    Audio format transcoder 有权
    音频格式转码器

    公开(公告)号:US08891797B2

    公开(公告)日:2014-11-18

    申请号:US13289252

    申请日:2011-11-04

    CPC分类号: G10L21/0272 G10L19/008

    摘要: An audio format transcoder for transcoding an input audio signal, the input audio signal having at least two directional audio components. The audio format transcoder including a converter for converting the input audio signal into a converted signal, the converted signal having a converted signal representation and a converted signal direction of arrival. The audio format transcoder further includes a position provider for providing at least two spatial positions of at least two spatial audio sources and a processor for processing the converted signal representation based on the at least two spatial positions to obtain at least two separated audio source measures.

    摘要翻译: 一种用于对输入音频信号进行代码转换的音频格式转码器,所述输入音频信号具有至少两个方向音频分量。 音频格式转码器包括用于将输入音频信号转换成转换信号的转换器,转换后的信号具有转换的信号表示和转换的信号到达方向。 音频格式转码器还包括用于提供至少两个空间音频源的至少两个空间位置的位置提供器和用于基于至少两个空间位置处理转换的信号表示的处理器,以获得至少两个分离的音频源测量。

    APPARATUS AND METHOD FOR MERGING GEOMETRY-BASED SPATIAL AUDIO CODING STREAMS
    10.
    发明申请
    APPARATUS AND METHOD FOR MERGING GEOMETRY-BASED SPATIAL AUDIO CODING STREAMS 有权
    用于协调基于几何的空间音频编码流的装置和方法

    公开(公告)号:US20130142341A1

    公开(公告)日:2013-06-06

    申请号:US13445585

    申请日:2012-04-12

    IPC分类号: H04R5/00

    摘要: An apparatus for generating a merged audio data stream is provided. The apparatus includes a demultiplexer for obtaining a plurality of single-layer audio data streams, wherein each input audio data stream includes one or more layers, wherein the demultiplexer is adapted to demultiplex each one of one or more input audio data streams having one or more layers into two or more demultiplexed audio data streams having exactly one layer. Furthermore, the apparatus includes a merging module for generating the merged audio data stream based on the plurality of single-layer audio data streams. Each layer of the input data audio streams, of the demultiplexed audio data streams, of the single-layer data streams and of the merged audio data stream includes a pressure value of a pressure signal, a position value and a diffuseness value as audio data.

    摘要翻译: 提供了一种用于生成合并的音频数据流的装置。 该装置包括用于获得多个单层音频数据流的解复用器,其中每个输入音频数据流包括一个或多个层,其中,解复用器适于解复用一个或多个输入音频数据流中的每一个具有一个或多个 层分成两个或更多个具有恰好一层的解复用音频数据流。 此外,该装置包括用于基于多个单层音频数据流生成合并音频数据流的合并模块。 单层数据流和合并音频数据流的解复用的音频数据流的输入数据音频流的每一层包括作为音频数据的压力信号,位置值和扩散度值的压力值。