公开(公告)号：US20080172225A1

公开(公告)日：2008-07-17

申请号：US11964506

申请日：2007-12-26

申请人： Gang-Youl KIM ,  Beak-Kwon Son

发明人： Gang-Youl KIM ,  Beak-Kwon Son

IPC分类号： G10L15/20

CPC分类号： G10L25/87

摘要： An apparatus for pre-processing a speech signal capable of improving the performance of speech signal processing by extracting the characteristics of noise that are distinguished from those of speech, and a method for extracting a speech end-point for the apparatus are provided. The apparatus includes a noise/speech determination unit for calculating noise information from at least one of an initial frame and a final frame of an input speech signal and determining if a current frame of the speech signal is a noise frame or a speech frame using the noise information, a hangover application unit for determining a predetermined number of frames transmitted after the current frame as consecutive speech frames when the current frame is the speech frame, and a speech information update unit for storing the speech frame and the consecutive speech frames. Noise information can be accurately calculated by using at least one of an initial noise frame and a final noise frame and continuously updating the noise information.

摘要翻译： 提供一种用于预处理能够通过提取与语音不同的噪声的特性来提高语音信号处理的性能的语音信号的装置，以及提供该装置的语音终点的方法。 该装置包括噪声/语音确定单元，用于从输入语音信号的初始帧和最终帧中的至少一个计算噪声信息，并且确定语音信号的当前帧是噪声帧还是使用语音帧 噪声信息，宿醉应用单元，用于当当前帧是语音帧时确定在当前帧之后发送的预定数量的帧作为连续语音帧;以及语音信息更新单元，用于存储语音帧和连续语音帧。 可以通过使用初始噪声帧和最终噪声帧中的至少一个来精确地计算噪声信息，并且连续地更新噪声信息。

公开(公告)号：US08457215B2

公开(公告)日：2013-06-04

申请号：US12644301

申请日：2009-12-22

申请人： Beak-Kwon Son ,  Sang-Ki Kang ,  Dong-Won Lee

发明人： Beak-Kwon Son ,  Sang-Ki Kang ,  Dong-Won Lee

IPC分类号： H04B1/10

CPC分类号： H04B1/1027 ,  H03G7/007 ,  H04L25/0202

摘要： A receiver suppresses noise simultaneously using a noise suppressor and an automatic gain controller (AGC). The receiver divides a received signal into an audio period and a non-audio period, analyzes whether the noise characteristic of the non-audio period corresponds to a non-static noise or a static noise, and if the noise characteristic corresponds to the static noise, analyzes whether the static noise is caused by a network or a transmitter side terminal. In accordance with the analyzed noise characteristic, the noise suppressor firstly suppresses the noise by determining the noise suppressing intensity, and sends a signal, from which the noise has been firstly suppressed, to the AGC. The AGC secondly suppresses the noise included in the signal. In this case, the threshold value of the AGC is controlled in real time in accordance with the noise characteristic. Also, since the noise level is lowered by the first noise suppressing, the threshold value of the AGC can be set to a lower value, and thus a swing phenomenon and a radiotelegraph phenomenon can be reduced.

摘要翻译： 接收机使用噪声抑制器和自动增益控制器（AGC）同时抑制噪声。 接收机将接收到的信号划分为音频周期和非音频周期，分析非音频周期的噪声特性是否对应于非静态噪声或静态噪声，并且如果噪声特性对应于静态噪声 分析静态噪声是由网络还是发射机侧终端引起的。 根据分析的噪声特性，噪声抑制器首先通过确定噪声抑制强度来抑制噪声，并且将首先被抑制噪声的信号发送到AGC。 AGC二次抑制信号中包含的噪声。 在这种情况下，根据噪声特性实时地控制AGC的阈值。 此外，由于通过第一噪声抑制来降低噪声电平，因此可以将AGC的阈值设定为较低的值，从而可以减少摆动现象和无线电报现象。