公开(公告)号：US20140105410A1

公开(公告)日：2014-04-17

申请号：US14015319

申请日：2013-08-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Wuzhou ZHAN

IPC: G10K11/175

CPC classification number: G10K11/175 ,  G10K2210/505 ,  H04M9/082

Abstract: The present invention discloses an echo cancellation method. The method includes: dividing an audio signal into a high-band audio signal and a low-band audio signal; performing adaptive filtering on the low-band audio signal, and performing synthesis filtering on a signal obtained after the low-band audio signal undergoes the adaptive filtering and on the high-band audio signal to generate a preliminary echo cancellation signal; performing envelope predication echo suppression on a high-band signal in the preliminary echo cancellation signal, and calculating and outputting a residual echo suppression coefficient; performing echo suppression on a low-band signal in the preliminary echo cancellation signal, and outputting a processing result; and multiplying the output result by the residual echo suppression coefficient, and outputting a signal of which echoes are canceled.

Abstract translation: 本发明公开了一种回声消除方法。 该方法包括：将音频信号分成高频带音频信号和低频带音频信号; 对低频带音频信号进行自适应滤波，对低频带音频信号进行自适应滤波后获得的信号和高频带音频信号进行合成滤波，生成初步回波消除信号; 对所述预回波消除信号中的高频带信号进行包络预测回波抑制，计算并输出残差回波抑制系数; 对所述初步回波消除信号中的低频带信号进行回波抑制，并输出处理结果; 并将输出结果乘以残差回波抑制系数，并输出消除了回波的信号。

公开(公告)号：US20140163970A1

公开(公告)日：2014-06-12

申请号：US14093127

申请日：2013-11-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Wuzhou ZHAN

IPC: G10L25/51

CPC classification number: H04M3/42221 ,  H04M3/56 ,  H04M2201/41 ,  H04M2203/301 ,  H04M2242/30

Abstract: Embodiments of the present invention provide a method, device, and system for classifying voice conference minutes. The method is: performing voice source locating according to audio data of the conference site so as to acquire a location of a voice source corresponding to the audio data, writing the location of the voice source into additional field information of the audio data, writing a voice activation flag into the additional field information, packaging the audio data as an audio code stream, and sending the audio code stream and the additional field information of the audio code stream to a recording server, so that the recording server classifies the audio data according to the additional field information and writes a participant identity that corresponds to the location of the voice source corresponding to the audio data into the additional field information of the audio code stream.

Abstract translation: 本发明的实施例提供了一种用于分类语音会议记录的方法，设备和系统。 该方法是：根据会场的音频数据进行语音源定位，以获取与音频数据相对应的语音源的位置，将语音源的位置写入音频数据的附加字段信息，写入 将语音激活标志转换为附加字段信息，将音频数据打包成音频码流，并将音频码流和音频码流的附加字段信息发送到记录服务器，使记录服务器根据 到附加字段信息，并将对应于音频数据的语音源的位置的参与者身份写入到音频码流的附加字段信息中。