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    • 5. 发明申请
    • METHOD, APPARATUS, AND SYSTEM FOR MEASURING ASYMMETRIC DELAY OF COMMUNICATION PATH
    • 用于测量通信路径不对称延迟的方法,装置和系统
    • US20120170631A1
    • 2012-07-05
    • US13406280
    • 2012-02-27
    • Song Liu
    • Song Liu
    • H04B17/00
    • H04L43/0864H04J3/0667
    • A method for measuring the asymmetric delay of a communication path includes: sending, by a first node, a first delay measurement message to a second node whose local clock is synchronized with the first node; receiving, by the first node, a second delay measurement message sent by the second node; calculating, according to time when the first delay measurement message is sent by the first node and time when the second node receives the first measurement message, a communication path delay in a direction towards the second node; calculating, according to time when the second node sends the second delay measurement message and time when the second measurement message is received by the first node, a communication path delay in a direction leaving the second node; and obtaining a measured value of the asymmetric delay of the communication path according to the communication path delays in the two directions.
    • 一种用于测量通信路径的非对称延迟的方法包括:由第一节点将第一延迟测量消息发送到其本地时钟与第一节点同步的第二节点; 由所述第一节点接收由所述第二节点发送的第二延迟测量消息; 根据第一节点发送第一延迟测量消息的时间和第二节点接收到第一测量消息的时间,计算朝向第二节点的方向的通信路径延迟; 根据第二节点发送第二延迟测量消息的时间和第一节点接收到第二测量消息的时间,计算出离开第二节点的方向上的通信路径延迟; 以及根据两个方向上的通信路径延迟获得通信路径的不对称延迟的测量值。
    • 6. 发明申请
    • System and Method for a Reference Generator
    • 参考生成器的系统和方法
    • US20100283535A1
    • 2010-11-11
    • US12771944
    • 2010-04-30
    • Minsheng LiGong Tom LeiSong LiuJun XiongYincai LiuFeiqin YangZuXu Qin
    • Minsheng LiGong Tom LeiSong LiuJun XiongYincai LiuFeiqin YangZuXu Qin
    • G05F1/10
    • G05F1/577
    • In one embodiment, a circuit for generating a reference voltage between a first output and a second output, has a first follower transistor that includes a first control node, a first follower node coupled to a first output, and a first supply node, and a second follower transistor that includes a second control node, a second follower node coupled to a second output and a second supply node. A first voltage drop circuit is coupled between a circuit supply node and the second supply node. The circuit is biased such that the voltage between the circuit supply node and the second supply node is greater than the voltage between the circuit supply node and the first supply node, and such that the voltage between the circuit supply node and the second control node is greater than the voltage between the circuit supply node and the first control node.
    • 在一个实施例中,用于在第一输出和第二输出之间产生参考电压的电路具有第一跟随器晶体管,其包括第一控制节点,耦合到第一输出的第一跟随器节点和第一供电节点,以及 第二跟随器晶体管,其包括第二控制节点,耦合到第二输出的第二跟随器节点和第二供应节点。 第一电压降电路耦合在电路供应节点和第二供电节点之间。 电路被偏压使得电路供应节点和第二供电节点之间的电压大于电路供应节点和第一供电节点之间的电压,并且使得电路供应节点和第二控制节点之间的电压为 大于电路供应节点和第一控制节点之间的电压。
    • 10. 发明授权
    • Noise canceling system and method, smart control method and device and communication equipment
    • 降噪系统及方法,智能控制方法及设备及通讯设备
    • US09379751B2
    • 2016-06-28
    • US14119611
    • 2011-11-08
    • Song LiuJian ZhaoShasha Lou
    • Song LiuJian ZhaoShasha Lou
    • A61F11/06G10K11/16H03B29/00H04B1/12H04R1/10H04R3/02
    • H04B1/12H04R1/1083H04R3/02H04R2410/05H04R2460/01H04R2499/13
    • The present invention discloses a noise canceling system and method, a smart control method and device and a communication equipment. Said smart control method includes: when it is detected there is no voice signal output at a receiving end of a communication equipment, receiving an outside noise signal from a reference microphone away from ears and a detection signal from a monitoring microphone near ears; implementing performance analysis on said received outside noise signal and said detection signal to estimate a noise reduction performance curve after said feed-forward active noise cancellation; and regulating parameters of the control circuit in said feed-forward active noise cancellation according to said estimated noise reduction performance curve and the preset noise reduction performance curve to make a difference between said estimated noise reduction performance curve and said preset noise reduction performance curve within a preset range.
    • 本发明公开了一种噪声消除系统和方法,智能控制方法和装置以及通信设备。 所述智能控制方法包括:当检测到通信设备的接收端没有语音信号输出时,从参考麦克风远离耳朵接收外部噪声信号和从耳朵附近的监测麦克风接收的检测信号; 对所述接收的外部噪声信号和所述检测信号执行性能分析,以估计所述前馈有源噪声消除之后的噪声降低性能曲线; 以及根据所述估计的噪声降低性能曲线和预设的降噪性能曲线来调节所述前馈有源噪声消除中的控制电路的参数,以使所述估计的降噪性能曲线与所述预设噪声降低性能曲线之间的差异 预设范围。