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    VOICE SWITCHING FOR VOICE COMMUNICATION ON COMPUTERS
    14.
    发明申请
    VOICE SWITCHING FOR VOICE COMMUNICATION ON COMPUTERS 有权
    电脑语音通话语音切换

    公开(公告)号：US20090207763A1

    公开(公告)日：2009-08-20

    申请号：US12032589

    申请日：2008-02-15

    申请人： Qin Li ,  Chao He

    发明人： Qin Li ,  Chao He

    IPC分类号： H04B3/20

    CPC分类号： H04M9/082

    摘要： A voice communication end device performs quality checks to determine whether acoustic echo cancellation would be ineffective, such as due to noise or clock drift or discontinuities between incoming and outgoing voice channels. In the case where echo cancellation would prove ineffective, the device falls back on a tri-state voice switching operation that includes a bi-direction state in which both channels are on in full duplex operation, which provides a smoother transition switching between active channels. The tri-state voice switching supports both voluntary transitions where the active user voluntarily stops to yield the active channel, and forced transitions where the active user is forcedly interrupted by the other user speaking more loudly.

    摘要翻译： 语音通信终端设备执行质量检查以确定声学回声消除是否无效，例如由于噪声或时钟漂移或入站和出局语音信道之间的不连续性。 在回声消除无效的情况下，设备退回到三态语音切换操作，该三态语音切换操作包括双向状态，其中两个信道都是全双工操作，这在主动信道之间提供更平滑的转换切换。 三态语音切换支持主动用户自愿停止以产生活动信道的自愿转换，以及强制转换，其中主动用户被其他用户强烈地更大声地中断。

    Method and apparatus for reducing timestamp noise in audio echo cancellation
    15.
    发明申请
    Method and apparatus for reducing timestamp noise in audio echo cancellation 有权
    用于减少音频回声消除中的时间戳噪声的方法和装置

    公开(公告)号：US20080259828A1

    公开(公告)日：2008-10-23

    申请号：US11788939

    申请日：2007-04-23

    申请人： Chao He ,  Qin Li ,  Wei-ge Chen

    发明人： Chao He ,  Qin Li ,  Wei-ge Chen

    IPC分类号： H04B15/00

    CPC分类号： H04M9/082

    摘要： 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.

    摘要翻译： 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。

    Filter bank optimization for acoustic echo cancellation
    16.
    发明申请
    Filter bank optimization for acoustic echo cancellation 有权
    用于声学回声消除的滤波器组优化

    公开(公告)号：US20080253553A1

    公开(公告)日：2008-10-16

    申请号：US11784893

    申请日：2007-04-10

    申请人： Qin Li ,  Wei-ge Chen ,  Chao He

    发明人： Qin Li ,  Wei-ge Chen ,  Chao He

    IPC分类号： H04M9/08

    CPC分类号： H04M9/082

    摘要： 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.

    摘要翻译： 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。

    Terminal device capable of link layer encryption and decryption and data processing method thereof
    18.
    发明授权
    Terminal device capable of link layer encryption and decryption and data processing method thereof 有权
    能够进行链路层加密和解密的终端设备及其数据处理方法

    公开(公告)号：US09009466B2

    公开(公告)日：2015-04-14

    申请号：US13995641

    申请日：2011-06-17

    申请人： Qin Li ,  Jun Cao ,  Manxia Tie

    发明人： Qin Li ,  Jun Cao ,  Manxia Tie

    IPC分类号： H04L29/06 ,  H04L9/08

    CPC分类号： H04L63/0428 ,  H04L9/08 ,  H04L63/162

    摘要： There are a terminal device capable of link layer encryption and decryption and a data process method thereof, and the terminal device includes a link layer processing module including a control module, a data frame encryption module, a data frame decryption module, a key management module, an algorithm module, a transmission port and a reception port; and the control module is connected with the transmission port through the data frame encryption module, the reception port is connected with the control module through the data frame decryption module, the control module is connected with the key management module, the data frame encryption module is connected with the data frame decryption module through the key management module, and the data frame encryption module is connected with the data frame decryption module through the algorithm module.

    摘要翻译： 存在能够进行链路层加密和解密的终端设备及其数据处理方法，并且终端设备包括链路层处理模块，该链路层处理模块包括控制模块，数据帧加密模块，数据帧解密模块，密钥管理模块 算法模块，传输端口和接收端口; 控制模块通过数据帧加密模块与传输端口连接，接收端口通过数据帧解密模块与控制模块连接，控制模块与密钥管理模块连接，数据帧加密模块为 通过密钥管理模块与数据帧解密模块相连，数据帧加密模块通过算法模块与数据帧解密模块连接。

    Method and system for pre-shared-key-based network security access control
    20.
    发明授权
    Method and system for pre-shared-key-based network security access control 有权
    用于基于预共享密钥的网络安全访问控制的方法和系统

    公开(公告)号：US08646055B2

    公开(公告)日：2014-02-04

    申请号：US13391526

    申请日：2009-12-24

    申请人： Li Ge ,  Jun Cao ,  Manxia Tie ,  Qin Li ,  Zhenhai Huang

    发明人： Li Ge ,  Jun Cao ,  Manxia Tie ,  Qin Li ,  Zhenhai Huang

    IPC分类号： G06F21/00

    CPC分类号： H04L63/061 ,  H04L63/0869 ,  H04L63/20

    摘要： A method and system for pre-shared-key-based network access control are disclosed. The method includes the following steps: 1) security policy negotiation is implemented between a REQuester (REQ) and Authentication Access Controller (AAC); 2) identity authentication and uni-cast key negotiation are implemented between REQ and AAC; 3) a group-cast key is notified between REQ and AAC. Applying the method and system, rapid bidirectional authentication can be implemented between a user and network.

    摘要翻译： 公开了一种基于预共享密钥的网络访问控制的方法和系统。 该方法包括以下步骤：1）在REQuester（REQ）和认证接入控制器（AAC）之间实现安全策略协商; 2）在REQ和AAC之间实现身份认证和单播密钥协商; 3）REQ和AAC之间通知组播密钥。 应用该方法和系统，可以在用户和网络之间实现快速双向认证。