公开(公告)号：US08259928B2

公开(公告)日：2012-09-04

申请号：US11788939

申请日：2007-04-23

Applicant: Chao He ,  Qin Li ,  Wei-ge Chen

Inventor： Chao He ,  Qin Li ,  Wei-ge Chen

IPC: H04M9/08

CPC classification number: H04M9/082

Abstract: A communication end device of a two-way communication system is shown. The device includes an audio signal capture device for capturing local audio to be transmitted to another end device, an audio signal rendering device for playing remote audio received from the other end device, and buffers for buffering the captured and rendered audio signals. The device also includes an audio echo canceller operating to predict echo from the rendered audio signal at a calculated relative offset in the captured audio signal based on an adaptive filter, and subtract the predicted echo from the signal transmitted to the other end device The calculated relative offset that is used by the audio echo canceller for a current signal sample is adjusted if a difference between it and an adjusted relative offset of a preceding sample exceeds a threshold value.

Abstract translation: 示出了双向通信系统的通信终端设备。 该装置包括用于捕获要发送到另一终端设备的本地音频的音频信号捕获设备，用于播放从另一端设备接收的远程音频的音频信号渲染设备，以及用于缓冲所捕获和渲染的音频信号的缓冲器。 该装置还包括音频回波消除器，其操作以基于自适应滤波器在所捕获的音频信号中以计算的相对偏移来预测来自渲染音频信号的回波，并且从发送到另一端装置的信号中减去预测回波。计算的相对 当音频回波消除器用于当前信号样本的偏移量如果其与先前样本的经调整的相对偏移之间的差异超过阈值则被调整。

公开(公告)号：US20120163615A1

公开(公告)日：2012-06-28

申请号：US13411865

申请日：2012-03-05

Applicant: Qin Li ,  Wei-ge Chen ,  Chao He

Inventor： Qin Li ,  Wei-ge Chen ,  Chao He

IPC: G10K11/16

CPC classification number: H04M9/082

Abstract: A communications device is presented for providing bi-directional audio communications between a near-end user and a far-end user via a bidirectional communications channel. The communications device includes an adaptive echo canceller receiving a near-end audio signal and a far-end audio signal and providing an echo-canceled near-end audio signal for transmission to the far-end user via the communications channel. The adaptive echo canceller includes a first bank of analysis filters for filtering the near-end audio signal, a second bank of analysis filters for filtering the far-end audio signal, and a bank of synthesis filters for filtering sub-band echo-canceled signals generated within the adaptive echo canceller. The first and second filter banks have a frequency response optimized to reduce echo residual gain.

Abstract translation: 呈现通信设备，用于经由双向通信信道在近端用户和远端用户之间提供双向音频通信。 通信设备包括接收近端音频信号和远端音频信号的自适应回波消除器，并提供回波消除的近端音频信号，以经由通信信道传输给远端用户。 自适应回波消除器包括用于滤波近端音频信号的第一组分析滤波器，用于滤波远端音频信号的第二组分析滤波器，以及用于滤波子带回波消除信号的一组合成滤波器 在自适应回波消除器内产生。 第一和第二滤波器组具有优化的频率响应以减少回波残余增益。

公开(公告)号：US20080259828A1

公开(公告)日：2008-10-23

申请号：US11788939

申请日：2007-04-23

Applicant: Chao He ,  Qin Li ,  Wei-ge Chen

Inventor： Chao He ,  Qin Li ,  Wei-ge Chen

IPC: H04B15/00

CPC classification number: H04M9/082

Abstract: A communication end device of a two-way communication system is shown. The device includes an audio signal capture device for capturing local audio to be transmitted to another end device, an audio signal rendering device for playing remote audio received from the other end device, and buffers for buffering the captured and rendered audio signals. The device also includes an audio echo canceller operating to predict echo from the rendered audio signal at a calculated relative offset in the captured audio signal based on an adaptive filter, and subtract the predicted echo from the signal transmitted to the other end device The calculated relative offset that is used by the audio echo canceller for a current signal sample is adjusted if a difference between it and an adjusted relative offset of a preceding sample exceeds a threshold value.

Abstract translation: 示出了双向通信系统的通信终端设备。 该装置包括用于捕获要发送到另一终端设备的本地音频的音频信号捕获设备，用于播放从另一端设备接收的远程音频的音频信号渲染设备，以及用于缓冲所捕获和渲染的音频信号的缓冲器。 该装置还包括音频回波消除器，其操作以基于自适应滤波器在所捕获的音频信号中以计算的相对偏移来预测来自渲染音频信号的回波，并且从发送到另一端装置的信号中减去预测回波。计算的相对 当音频回波消除器用于当前信号样本的偏移量如果其与先前样本的经调整的相对偏移之间的差异超过阈值则被调整。

公开(公告)号：US20080253553A1

公开(公告)日：2008-10-16

申请号：US11784893

申请日：2007-04-10

Applicant: Qin Li ,  Wei-ge Chen ,  Chao He

Inventor： Qin Li ,  Wei-ge Chen ,  Chao He

IPC: H04M9/08

CPC classification number: H04M9/082

Abstract: A communications device is presented for providing bi-directional audio communications between a near-end user and a far-end user via a bidirectional communications channel. The communications device includes an adaptive echo canceller receiving a near-end audio signal and a far-end audio signal and providing an echo-canceled near-end audio signal for transmission to the far-end user via the communications channel. The adaptive echo canceller includes a first bank of analysis filters for filtering the near-end audio signal, a second bank of analysis filters for filtering the far-end audio signal, and a bank of synthesis filters for filtering sub-band echo-canceled signals generated within the adaptive echo canceller. The first and second filter banks have a frequency response optimized to reduce echo residual gain.

Abstract translation: 呈现通信设备，用于经由双向通信信道在近端用户和远端用户之间提供双向音频通信。 通信设备包括接收近端音频信号和远端音频信号的自适应回波消除器，并提供回波消除的近端音频信号，以经由通信信道传输给远端用户。 自适应回波消除器包括用于滤波近端音频信号的第一组分析滤波器，用于滤波远端音频信号的第二组分析滤波器，以及用于滤波子带回波消除信号的一组合成滤波器 在自适应回波消除器内产生。 第一和第二滤波器组具有优化的频率响应以减少回波残余增益。

公开(公告)号：US08942370B2

公开(公告)日：2015-01-27

申请号：US13411865

申请日：2012-03-05

Applicant: Qin Li ,  Wei-ge Chen ,  Chao He

Inventor： Qin Li ,  Wei-ge Chen ,  Chao He

IPC: H04M9/08

CPC classification number: H04M9/082

Abstract: A communications device is presented for providing bi-directional audio communications between a near-end user and a far-end user via a bidirectional communications channel. The communications device includes an adaptive echo canceller receiving a near-end audio signal and a far-end audio signal and providing an echo-canceled near-end audio signal for transmission to the far-end user via the communications channel. The adaptive echo canceller includes a first bank of analysis filters for filtering the near-end audio signal, a second bank of analysis filters for filtering the far-end audio signal, and a bank of synthesis filters for filtering sub-band echo-canceled signals generated within the adaptive echo canceller. The first and second filter banks have a frequency response optimized to reduce echo residual gain.

Abstract translation: 呈现通信设备，用于经由双向通信信道在近端用户和远端用户之间提供双向音频通信。 通信设备包括接收近端音频信号和远端音频信号的自适应回波消除器，并提供回波消除的近端音频信号，以经由通信信道传输给远端用户。 自适应回波消除器包括用于滤波近端音频信号的第一组分析滤波器，用于滤波远端音频信号的第二组分析滤波器，以及用于滤波子带回波消除信号的一组合成滤波器 在自适应回波消除器内产生。 第一和第二滤波器组具有优化的频率响应以减少回波残余增益。

公开(公告)号：US08155304B2

公开(公告)日：2012-04-10

申请号：US11784893

申请日：2007-04-10

Applicant: Qin Li ,  Wei-ge Chen ,  Chao He

Inventor： Qin Li ,  Wei-ge Chen ,  Chao He

IPC: H04M9/08

CPC classification number: H04M9/082

Abstract: A communications device is presented for providing bi-directional audio communications between a near-end user and a far-end user via a bidirectional communications channel. The communications device includes an adaptive echo canceller receiving a near-end audio signal and a far-end audio signal and providing an echo-canceled near-end audio signal for transmission to the far-end user via the communications channel. The adaptive echo canceller includes a first bank of analysis filters for filtering the near-end audio signal, a second bank of analysis filters for filtering the far-end audio signal, and a bank of synthesis filters for filtering sub-band echo-canceled signals generated within the adaptive echo canceller. The first and second filter banks have a frequency response optimized to reduce echo residual gain.

Abstract translation: 呈现通信设备，用于经由双向通信信道在近端用户和远端用户之间提供双向音频通信。 通信设备包括接收近端音频信号和远端音频信号的自适应回波消除器，并提供回波消除的近端音频信号，以经由通信信道传输给远端用户。 自适应回波消除器包括用于滤波近端音频信号的第一组分析滤波器，用于滤波远端音频信号的第二组分析滤波器，以及用于滤波子带回波消除信号的一组合成滤波器 在自适应回波消除器内产生。 第一和第二滤波器组具有优化的频率响应以减少回波残余增益。

公开(公告)号：US20130151244A1

公开(公告)日：2013-06-13

申请号：US13316430

申请日：2011-12-09

Applicant: Wei-ge Chen ,  Zhengyou Zhang ,  Jaemo Yang

Inventor： Wei-ge Chen ,  Zhengyou Zhang ,  Jaemo Yang

IPC: G10L19/14

CPC classification number: G10L25/69

Abstract: Speech quality estimation technique embodiments are described which generally involve estimating the human speech quality of an audio frame in a single-channel audio signal. A representation of a harmonic component of the frame is synthesized and used to compute a non-harmonic component of the frame. The synthesized harmonic component representation and the non-harmonic component are then used to compute a harmonic to non-harmonic ratio (HnHR). This HnHR is indicative of the quality of a user's speech and is designated as an estimate of the speech quality of the frame. In one implementation, the HnHR is used to establish a minimum speech quality threshold below which the quality of the user's speech is considered unacceptable. Feedback to the user is then provided based on whether the HnHR falls below the threshold.

Abstract translation: 描述了通常涉及在单声道音频信号中估计音频帧的人类语音质量的语音质量估计技术实施例。 合成帧的谐波分量的表示，并用于计算帧的非谐波分量。 然后使用合成谐波分量表示和非谐波分量来计算谐波到非谐波比（HnHR）。 该HnHR表示用户语音的质量，并且被指定为帧的语音质量的估计。 在一个实现中，HnHR用于建立最小语音质量阈值，低于该最低语音质量阈值，用户语音的质量被认为是不可接受的。 然后基于HnHR是否低于阈值来提供对用户的反馈。

公开(公告)号：US20100303266A1

公开(公告)日：2010-12-02

申请号：US12472080

申请日：2009-05-26

Applicant: Wei-ge Chen ,  Zhengyou Zhang

Inventor： Wei-ge Chen ,  Zhengyou Zhang

IPC: H04R5/02

CPC classification number: H04R27/00

Abstract: A spatial element is added to communications, including over telephone conference calls heard through headphones or a stereo speaker setup. Functions are created to modify signals from different callers to create the illusion that the callers are speaking from different parts of the room.

Abstract translation: 一个空间元素添加到通信中，包括通过耳机听到的电话会议通话或立体声扬声器设置。 创建功能来修改来自不同呼叫者的信号，以创建呼叫者从房间的不同部分讲话的错觉。

公开(公告)号：US20050015249A1

公开(公告)日：2005-01-20

申请号：US10647923

申请日：2003-08-25

Applicant: Sanjeev Mehrotra ,  Wei-ge Chen

Inventor： Sanjeev Mehrotra ,  Wei-ge Chen

IPC: G10L15/02 ,  G10L19/00 ,  G10L19/02 ,  G10L19/06 ,  G10L19/14

CPC classification number: G10L19/008 ,  G10L19/0017 ,  G10L19/02 ,  G10L19/0212 ,  G10L19/025 ,  G10L19/032 ,  G10L19/038 ,  G10L19/06 ,  G10L19/24 ,  G10L2015/025

Abstract: An audio encoder performs adaptive entropy encoding of audio data. For example, an audio encoder switches between variable dimension vector Huffman coding of direct levels of quantized audio data and run-level coding of run lengths and levels of quantized audio data. The encoder can use, for example, context-based arithmetic coding for coding run lengths and levels. The encoder can determine when to switch between coding modes by counting consecutive coefficients having a predominant value (e.g., zero). An audio decoder performs corresponding adaptive entropy decoding.

Abstract translation: 音频编码器执行音频数据的自适应熵编码。 例如，音频编码器在量化音频数据的直接电平的可变维矢量霍夫曼编码和游程长度的游程级编码以及量化的音频数据的电平之间切换。 编码器可以使用例如用于对运行长度和电平进行编码的基于上下文的算术编码。 编码器可以通过计算具有主要值（例如，零）的连续系数来确定何时在编码模式之间切换。 音频解码器执行相应的自适应熵解码。

公开(公告)号：US5970173A

公开(公告)日：1999-10-19

申请号：US658094

申请日：1996-06-04

Applicant: Ming-Chieh Lee ,  Wei-ge Chen

Inventor： Ming-Chieh Lee ,  Wei-ge Chen

IPC: G06F17/15 ,  G06K9/64 ,  G06T7/20 ,  G06T9/00 ,  G06T9/20 ,  H04N7/015 ,  H04N7/26 ,  H04N7/30 ,  H04N7/32 ,  H04N7/36 ,  G06K9/36 ,  G06K9/46

CPC classification number: H04N19/00 ,  G06F17/153 ,  G06K9/6203 ,  G06T7/2013 ,  G06T9/20 ,  H04N19/186 ,  H04N19/23 ,  H04N19/51 ,  H04N19/517 ,  H04N19/537 ,  H04N19/54 ,  H04N19/543 ,  H04N19/563 ,  H04N19/61 ,  H04N19/63 ,  H04N19/649 ,  G06T2207/10016 ,  H04N19/20

Abstract: A transformation method provides a multi-dimensional affine transformation for representing motion between corresponding image components of successive video image frames. The multi-dimensional affine transformations can represent complex motion that includes any or all of translation, rotation, magnification, and shear. The transformation method of this invention includes determining motion transformations between corresponding pixels in the image components of the first and second video image frames. From the motion transformations between corresponding pixels, multi-dimensional affine motion transformations between the corresponding image components are determined. This transformation method increases the accuracy with which complex motion is represented and results in fewer compression or encoding errors in comparison to conventional methods, thereby increasing compression efficiency.

Abstract translation: 变换方法提供用于表示连续视频图像帧的相应图像分量之间的运动的多维仿射变换。 多维仿射变换可以表示包括平移，旋转，放大和剪切中的任何或全部的复杂运动。 本发明的变换方法包括确定第一和第二视频帧的图像分量中的相应像素之间的运动变换。 根据相应像素之间的运动变换，确定相应图像分量之间的多维仿射运动变换。 与传统方法相比，该变换方法增加了表示复运动的精度，导致较少的压缩或编码误差，从而提高了压缩效率。