利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

10 条记录 (耗时 0.044 秒)

    CLOCK MANAGEMENT BETWEEN TWO ENDPOINTS
    2.
    发明申请
    CLOCK MANAGEMENT BETWEEN TWO ENDPOINTS 有权
    两个终点之间的时间管理

    公开(公告)号：US20090041020A1

    公开(公告)日：2009-02-12

    申请号：US11835203

    申请日：2007-08-07

    申请人： Lee D. Gibbons ,  Luke A. Tucker ,  Alexander Scholte ,  Mei-Sing Ong

    发明人： Lee D. Gibbons ,  Luke A. Tucker ,  Alexander Scholte ,  Mei-Sing Ong

    IPC分类号： H04L12/28

    CPC分类号： H04J3/0664 ,  H04N21/4305 ,  H04N21/6437 ,  H04N21/8547

    摘要： Clock correlation can be achieved, for example, utilizing the RTP stream between a sender and receiver by determining a baseline at the start of, for example, a communication. This baseline is derived as a point in time from an arriving packet and represents a point from which subsequent packets deviate. Using this baseline, an early packet or a late packet can be detected. An early packet pushes the baseline down to that earlier point, while late arriving packets, if they are arriving late for a continuous period of time, represents a shift in the opposite direction from the baseline, resulting in a baseline moving to the “earliest” packet out of the sequence of the late arriving packets.

    摘要翻译： 可以实现时钟相关性，例如，通过在例如通信的开始处确定基线来在发送者和接收者之间利用RTP流。 该基线作为从到达分组的时间点导出，并且表示随后的分组偏离的点。 使用该基线，可以检测到早期分组或延迟分组。 早期的数据包将基线推到较早的时间点，而迟到的数据包，如果它们迟到了连续的一段时间，则表示与基线相反的方向偏移，导致基线移动到“最早” 从后期到达的数据包的序列中分组。

    Clock management between two end points
    3.
    发明授权
    Clock management between two end points 有权
    两个端点之间的时钟管理

    公开(公告)号：US07936794B2

    公开(公告)日：2011-05-03

    申请号：US11835203

    申请日：2007-08-07

    申请人： Lee D. Gibbons ,  Luke A. Tucker ,  Alexander Scholte ,  Mei-Sing Ong

    发明人： Lee D. Gibbons ,  Luke A. Tucker ,  Alexander Scholte ,  Mei-Sing Ong

    IPC分类号： H04J3/06 ,  H04L12/28

    CPC分类号： H04J3/0664 ,  H04N21/4305 ,  H04N21/6437 ,  H04N21/8547

    摘要： Clock correlation can be achieved, for example, utilizing the RTP stream between a sender and receiver by determining a baseline at the start of, for example, a communication. This baseline is derived as a point in time from an arriving packet and represents a point from which subsequent packets deviate. Using this baseline, an early packet or a late packet can be detected. An early packet pushes the baseline down to that earlier point, while late arriving packets, if they are arriving late for a continuous period of time, represents a shift in the opposite direction from the baseline, resulting in a baseline moving to the “earliest” packet out of the sequence of the late arriving packets.

    摘要翻译： 可以实现时钟相关性，例如，通过在例如通信的开始处确定基线来在发送者和接收者之间利用RTP流。 该基线作为从到达分组的时间点导出，并且表示随后的分组偏离的点。 使用该基线，可以检测到早期分组或延迟分组。 早期的数据包将基线推到较早的时间点，而迟到的数据包，如果它们迟到了连续的一段时间，则表示与基线相反的方向偏移，导致基线移动到“最早” 从后期到达的数据包的序列中分组。

    Method and apparatus for policy and admission control in packet-based communication systems
    4.
    发明授权
    Method and apparatus for policy and admission control in packet-based communication systems 有权
    基于分组的通信系统中的策略和接纳控制的方法和装置

    公开(公告)号：US07428216B2

    公开(公告)日：2008-09-23

    申请号：US10261432

    申请日：2002-09-30

    申请人： Anwar A. Siddiqui ,  Luke A. Tucker

    发明人： Anwar A. Siddiqui ,  Luke A. Tucker

    IPC分类号： H04L12/26

    CPC分类号： H04L47/10 ,  H04L12/5692 ,  H04L47/20 ,  H04L47/2408 ,  H04L47/2458 ,  H04L47/31 ,  H04L47/70 ,  H04L47/724 ,  H04L47/741 ,  H04L47/762 ,  H04L47/801 ,  H04L47/805

    摘要： Techniques are disclosed for establishing packet-based communication between first and second endpoints over a network, in a manner which reduces the latency and complexity associated with call setup. In accordance with one aspect of the invention, a resource is requested from the network utilizing a first protocol, and while the request is pending, transmission of packets at a first priority level is commenced. After a response is received from the network granting access to the requested resource, a tagging mechanism is utilized to identify particular packets for transmission at a second priority level higher than the first priority level. In an illustrative embodiment, the first protocol is the Resource Reservation Protocol (RSVP), the first priority level corresponds to a Better than Best Effort (BBE) policy, and the second, higher priority level corresponds to an Expedited Forwarding (EF) policy. These policy levels may be implemented for a given packet by setting a Type of Service (TOS) byte in a header of the given packet to a value specifying the corresponding policy.

    摘要翻译： 公开了用于通过网络在第一和第二端点之间建立基于分组的通信的技术，以减少与呼叫建立相关联的等待时间和复杂度的方式。 根据本发明的一个方面，使用第一协议从网络请求资源，并且当请求正在等待时，开始以第一优先级别的分组的传输。 在从接收到所请求的资源的网络接收到响应之后，使用标记机制来识别特定分组以在比第一优先级高的第二优先级级传输。 在说明性实施例中，第一协议是资源预留协议（RSVP），第一优先级对应于优于最佳努力（BBE）策略，而第二优先权级别对应于快速转发（EF）策略。 可以通过将给定分组的报头中的服务类型（TOS）字节设置为指定相应策略的值，来为给定分组实现这些策略级别。

    Efficient voice activity detector to detect fixed power signals
    5.
    发明授权
    Efficient voice activity detector to detect fixed power signals 有权
    高效的语音活动检测器，用于检测固定功率信号

    公开(公告)号：US08311814B2

    公开(公告)日：2012-11-13

    申请号：US11523933

    申请日：2006-09-19

    申请人： Mei-Sing Ong ,  Luke A. Tucker

    发明人： Mei-Sing Ong ,  Luke A. Tucker

    IPC分类号： G10L11/06

    CPC分类号： G10L25/78

    摘要： The present invention is directed to a voice activity detector that uses the periodicity of amplitude peaks and valleys to identify signals of substantially fixed power or having periodicity.

    摘要翻译： 本发明涉及一种语音活动检测器，其使用幅度峰值和谷值的周期来识别基本上固定的功率或具有周期性的信号。

    Method and apparatus for controlling access to a media port
    6.
    发明授权
    Method and apparatus for controlling access to a media port 有权
    用于控制对媒体端口的访问的方法和装置

    公开(公告)号：US08169901B1

    公开(公告)日：2012-05-01

    申请号：US10839539

    申请日：2004-05-04

    申请人： Alexander Martin Scholte ,  Luke A. Tucker

    发明人： Alexander Martin Scholte ,  Luke A. Tucker

    IPC分类号： G01R31/08

    CPC分类号： H04L63/1458

    摘要： The present invention is directed to protecting media packet processors from rogue or malicious data packet flows. According to the present invention, feedback obtained from components of a media packet processor having information regarding media stream flows is used to adjust a counter or token bucket controlling the admission of such flows. More specifically, feedback is used to adjust a counter value such that the count value is decremented, or the operation of the counter in incrementing the count value according to a periodic schedule is suppressed, if a dropped packet is detected. Accordingly, the present invention may utilize the predictable quality of media stream flows, and information from components such as jitter buffers and CODECs, in order to tailor bounds on the flow of ingress traffic to a media packet processor.

    摘要翻译： 本发明旨在保护媒体分组处理器免于流氓或恶意数据分组流。 根据本发明，使用具有关于媒体流的信息的媒体分组处理器的组件获得的反馈来调整控制这种流的准入的计数器或令牌桶。 更具体地，如果检测到丢弃的分组，则使用反馈来调整计数值，使得计数值递减，或者如果抑制了丢弃的分组，则抑制了根据周期性调度递增计数值的计数器的操作。 因此，本发明可以利用媒体流流的可预测的质量，以及来自诸如抖动缓冲器和CODEC之类的组件的信息，以便定制到媒体分组处理器的入口流量的界限。

    Optimizing conference quality with diverse codecs
    7.
    发明授权
    Optimizing conference quality with diverse codecs 有权
    使用多种编解码器优化会议质量

    公开(公告)号：US08433050B1

    公开(公告)日：2013-04-30

    申请号：US11348668

    申请日：2006-02-06

    申请人： Benjamin J. Baten ,  Luke A. Tucker

    发明人： Benjamin J. Baten ,  Luke A. Tucker

    IPC分类号： H04M3/42

    CPC分类号： H04M7/0072 ,  H04L65/403 ,  H04L65/80 ,  H04M3/568

    摘要： The present invention is directed toward a method and system for maintaining a high quality teleconference. The system provides a way of allowing participants of a conference call to experience the call according to the highest quality codec that their endpoint supports.

    摘要翻译： 本发明涉及一种用于维持高质量电话会议的方法和系统。 该系统提供了允许电话会议的参与者根据其端点支持的最高质量的编解码器来体验呼叫的方式。

    Efficient voice activity detector to detect fixed power signals
    9.
    发明申请
    Efficient voice activity detector to detect fixed power signals 有权
    高效的语音活动检测器，用于检测固定功率信号

    公开(公告)号：US20080071531A1

    公开(公告)日：2008-03-20

    申请号：US11523933

    申请日：2006-09-19

    申请人： Mei-Sing Ong ,  Luke A. Tucker

    发明人： Mei-Sing Ong ,  Luke A. Tucker

    IPC分类号： G10L15/00

    CPC分类号： G10L25/78

    摘要： The present invention is directed to a voice activity detector that uses the periodicity of amplitude peaks and valleys to identify signals of substantially fixed power or having periodicity.

    摘要翻译： 本发明涉及一种语音活动检测器，其使用幅度峰值和谷值的周期来识别基本上固定的功率或具有周期性的信号。

    Double-talk detector suitable for a telephone-enabled PC
    10.
    发明授权
    Double-talk detector suitable for a telephone-enabled PC 失效
    双通话检测器适用于支持电话的PC

    公开(公告)号：US06792107B2

    公开(公告)日：2004-09-14

    申请号：US09771260

    申请日：2001-01-26

    申请人： Luke A. Tucker ,  Mark Greig Wildie

    发明人： Luke A. Tucker ,  Mark Greig Wildie

    IPC分类号： H04M100

    CPC分类号： H04B3/234

    摘要： A double-talk detector (109) for an acoustic echo canceler (104) of a VoIP terminal (101) converts (216,226) received far-end signals (212) and transmitted near-end signals (222) into the frequency domain and high-pass filters out (218,228) low-frequencies representing noise to obtain a complex reference signal and a complex error signal, respectively. It then correlates (230) the complex signals and computes (232) the instantaneous error energy (234) and smoothed (long-term average) error energy (235) of the complex error signal. If the convergence value is below 0.06 (300), the signals are converged and double-talk detection is enabled (306). If the convergence value is above 0.09 (312), the signals are diverged and double-talk detection is disabled (316). If double-talk detection is not enabled, an error threshold (236) is set (304,318) to the value of the smoothed error energy. If double-talk detection is enabled (320), presence of double-talk is indicated (328) if the instantaneous error energy value exceeds (324) the error threshold, and absence of double-talk is indicated (326) if the instantaneous error energy value does not exceed (324) the error threshold.

    摘要翻译： 用于VoIP终端（101）的声学回波消除器（104）的双方通话检测器（109）将接收的远端信号（212）和发送的近端信号（222）（216,226）转换成频域并且高 通过滤除（218,228）表示噪声的低频，以分别获得复参考信号和复信号。 然后，将复信号（230）相关（230）并计算复数误差信号的瞬时误差能量（234）和平滑（长期平均）误差能量（235）（232）。 如果收敛值低于0.06（300），则信号被收敛并且能够进行双方通话检测（306）。 如果收敛值高于0.09（312），则信号发散，双方通话检测被禁用（316）。 如果没有启用双方通话检测，则将误差阈值（236）设置为平滑误差能量的值（304,318）。 如果启用双方通话检测（320），如果瞬时误差能量值超过（324）误差阈值，则指示双方通话的存在（328），并且如果瞬时误差指示不存在双方通话（326） 能量值不超过（324）误差阈值。