公开(公告)号：US5436590A

公开(公告)日：1995-07-25

申请号：US295588

申请日：1994-08-25

申请人： J. M. A. Frederic Simard ,  William T. Ross

发明人： J. M. A. Frederic Simard ,  William T. Ross

IPC分类号： H04L25/06 ,  H03C3/00 ,  H04L27/14

CPC分类号： H04L25/062 ,  H04L25/064

摘要： A digital FSK demodulator used in e.g. a telephone loop produces unequal amplitudes in detected mark and space tones. The inequality or offset must be cancelled so that a proper timing signal can be recovered from the FSK signal. The demodulator includes a digital compensation circuit for offset cancellation in which peak amplitudes of digital 0 and digital 1 signals are continuously monitored. The peak amplitudes are then averaged to obtain an offset estimation which is subtracted from the output of the demodulator for offset compensation.

摘要翻译： 用于例如数字FSK解调器。 电话回路在检测到的标记和空间音调中产生不等幅度。 必须取消不等式或偏移量，以便从FSK信号中恢复正确的定时信号。 解调器包括用于偏移消除的数字补偿电路，其中连续监视数字0和数字1信号的峰值幅度。 然后对峰值幅度进行平均以获得从用于偏移补偿的解调器的输出中减去的偏移估计。

公开(公告)号：US06792030B2

公开(公告)日：2004-09-14

申请号：US09412439

申请日：1999-10-05

申请人： Michael C. G. Lee ,  Frederic Simard

发明人： Michael C. G. Lee ,  Frederic Simard

IPC分类号： H04B169

CPC分类号： H04B1/69 ,  H04B2201/70715

摘要： The invention provides a method and apparatus for establishing a non-obtrusive data channel within a voice communication channel to transmit data during an audio transmission without disruption. This audio transmission can be for example, an audio conversation between a first and a second party. The invention uses spread spectrum modulation to hide the reception and transmission of data from the first and second party and allow the ongoing conversation to proceed uninterrupted. In a preferred embodiment, the invention is used to provide an enhanced call waiting feature whereby caller identifying (ID) information of a third party is transmitted over a telephone line from a local central office (CO) to a first party engaged in a telephone conversation with a second party. Advantageously, the use of spread spectrum modulation to transmit data in a voice channel carrying a telephone conversation prevents any interruption in the on-going conversation and does not result in any noticeable disruption.

摘要翻译： 本发明提供了一种用于在语音通信信道内建立非突出数据信道以在音频传输期间传输数据而不中断的方法和装置。 该音频传输可以是例如第一方和第二方之间的音频会话。 本发明使用扩频调制来隐藏来自第一方和第二方的数据的接收和传输，并允许正在进行的对话不间断地进行。 在优选实施例中，本发明用于提供增强的呼叫等待特征，其中通过电话线将来自第一方的主叫识别（ID）信息从本地中心局（CO）发送到参与电话会话的第一方 与第二方。 有利地，使用扩频调制在携带电话会话的语音信道中发送数据可防止正在进行的会话中的任何中断，并且不会导致任何明显的中断。

公开(公告)号：US20050185602A1

公开(公告)日：2005-08-25

申请号：US11113050

申请日：2005-04-25

申请人： Frederic Simard ,  David Cuddy ,  Philip Edholm

发明人： Frederic Simard ,  David Cuddy ,  Philip Edholm

IPC分类号： H04M3/56 ,  H04M7/00 ,  G06F15/16

CPC分类号： H04M3/561 ,  H04M3/569 ,  H04M2207/203

摘要： The performance of a voice conference using a packet-based conference bridge can be improved with a number of modifications. In one modification, the conference bridge receives speech indication signals from the individual packet-based terminals within the voice conference, these speech indication signals then being used by the conference bridge to select the talkers within the voice conference. This removes the need for speech detection techniques within the conference bridge, hence decreasing the required processing power and the latency within the conference bridge. In another modification, the conference bridge sends addressing control signals to the individual packet-based terminals selected as talkers, these addressing control signals directing the terminals selected as talkers to directly transmit their voice data packets to the other terminals within the voice conference. This direct transmission of voice data packets can reduce transcoding and latency within the network. These two modifications could further be combined, resulting in a conference bridge that receives speech indication signals, selects the talkers for the voice conference and outputs addressing control signal to the talkers. In this case, the advantages of the two modifications are gained as well as additional capacity advantages resulting from no voice signals actually traversing the conference bridge.

公开(公告)号：US5828965A

公开(公告)日：1998-10-27

申请号：US720277

申请日：1996-09-26

申请人： Michael Brown ,  Laura A. Mahan ,  Andre J. Van Schyndel ,  Hugh M. Collins ,  Frederic Simard ,  Christopher M. Forrester

发明人： Michael Brown ,  Laura A. Mahan ,  Andre J. Van Schyndel ,  Hugh M. Collins ,  Frederic Simard ,  Christopher M. Forrester

IPC分类号： H04M1/02 ,  H04M1/60 ,  H04Q7/32

CPC分类号： H04M1/605 ,  H04M1/0245 ,  H04M1/0214

摘要： Portable wireless telephone handset with a flap movable upon a housing. In a first position the flap is close to a speaker to enable the flap to be disposed near to a user's ear for the user to receive personal low volume sound from the speaker. In a second position, the flap is further from the speaker to detract from use of the speaker near to the user's ear. In the second position of the flap, the speaker operates in loudspeaker mode. A switch is provided to change the speaker between loudspeaker and low volume sound mode, the switch operation being dependent upon flap position.

摘要翻译： 便携式无线电话听筒，带有可在外壳上移动的挡板。 在第一位置，翼片靠近扬声器，以使翼片能够靠近使用者的耳朵放置，使得用户能够从扬声器接收个人低音量的声音。 在第二位置，舌片进一步离开扬声器以减少靠近使用者耳朵的扬声器的使用。 在襟翼的第二位置，扬声器以扬声器模式工作。 提供开关以改变扬声器和低音量声音模式之间的扬声器，开关操作取决于翻盖位置。

公开(公告)号：US08971706B2

公开(公告)日：2015-03-03

申请号：US10261099

申请日：2002-09-30

申请人： Ornan A. Gerstel ,  Humair Raza ,  Rajiv Ramaswami ,  Babu O. Narayanan ,  Robert Ward ,  Robert Keys ,  David Park ,  Vasant Sahay ,  Osama Aboul-Magd ,  Frederic Simard

发明人： Ornan A. Gerstel ,  Humair Raza ,  Rajiv Ramaswami ,  Babu O. Narayanan ,  Robert Ward ,  Robert Keys ,  David Park ,  Vasant Sahay ,  Osama Aboul-Magd ,  Frederic Simard

IPC分类号： H04J14/00 ,  H04J14/02 ,  H04B10/032 ,  H04B10/07 ,  H04B10/077 ,  H04B10/079 ,  H04B10/27

CPC分类号： H04J14/0227 ,  H04B10/032 ,  H04B10/07 ,  H04B10/0775 ,  H04B10/0793 ,  H04B10/27 ,  H04B2210/071 ,  H04B2210/075 ,  H04J14/0241 ,  H04J14/0279 ,  H04J14/0284 ,  H04J14/0287 ,  H04J14/0294 ,  H04J14/0297

摘要： Automatic discovery and verification of optical communication links as well as isolation of link failures in an optical communication system.

摘要翻译： 光通信链路的自动发现和验证以及光通信系统中链路故障的隔离。

公开(公告)号：US20090161873A1

公开(公告)日：2009-06-25

申请号：US11960208

申请日：2007-12-19

申请人： Frederic Simard ,  Behrouz Nikpour ,  Xiaoqing-Richard Hu

发明人： Frederic Simard ,  Behrouz Nikpour ,  Xiaoqing-Richard Hu

IPC分类号： H04L9/06

CPC分类号： H04L9/0891 ,  H04L63/061

摘要： A method executed by a first network entity in communication with a second network entity. The method comprises maintaining a first key bank containing a key designated as an active key for the first network entity; maintaining a second key bank containing a key designated as a standby key for the first network entity; encrypting data for transmission to the second network entity using the active key for the first network entity; attempting to detect a match between (i) a representation of the standby key for the first network entity and (ii) a representation of a standby key for the second network entity received from the second network entity; and upon detecting a match, causing the active key for the first network entity to designate thereafter the key contained in the second key bank.

摘要翻译： 由与第二网络实体通信的第一网络实体执行的方法。 该方法包括维护包含被指定为第一网络实体的活动密钥的密钥的第一密钥库; 维护包含指定为第一网络实体的备用密钥的密钥的第二密钥库; 使用所述第一网络实体的活动密钥加密用于传输到所述第二网络实体的数据; 尝试检测（i）第一网络实体的备用密钥的表示和（ii）从第二网络实体接收的第二网络实体的备用密钥的表示之间的匹配; 并且在检测到匹配时，使得第一网络实体的活动密钥此后指定包含在第二密钥库中的密钥。

公开(公告)号：US06922532B2

公开(公告)日：2005-07-26

申请号：US09730550

申请日：2000-12-07

申请人： Frederic Simard ,  David W. Park

发明人： Frederic Simard ,  David W. Park

IPC分类号： H01S3/00 ,  H04B10/02 ,  H04B10/08 ,  H04B10/16 ,  H04B10/17 ,  H04B10/18 ,  H04J14/00 ,  H04J14/02 ,  H04B10/00 ,  H04B10/12

CPC分类号： H04B10/07955 ,  H04B10/0775 ,  H04B10/2537 ,  H04B2210/072 ,  H04B2210/078

摘要： A performance monitoring method for an optically amplified transmission system. The method provides the optical power at each amplifier site, taking into account the inaccuracies introduced by the SRS in the power estimation obtained with the current methods. An optical spectrum analyzer is used at the output of the transmission link of interest to accurately measure the output power of each wavelength. This value is sent upstream to the last amplifier in the link, to compute an error term as the difference between the actual measurement and the estimation. The error term is used to infer the SRS-induced error by system elements not accounted for in the model. The error term is then fed-back to each amplifier in the link, so that the estimated power is adjusted to account for the SRS-induced inaccuracy.

摘要翻译： 一种用于光放大传输系统的性能监测方法。 该方法在每个放大器位置提供光功率，考虑到在使用当前方法获得的功率估计中由SRS引入的不准确性。 在感兴趣的传输链路的输出端使用光谱分析仪来精确测量每个波长的输出功率。 该值被发送到链路中的最后一个放大器的上游，以将误差项计算为实际测量与估计之间的差值。 误差项用于推断模型中未考虑的系统元素的SRS引起的误差。 然后将误差项反馈到链路中的每个放大器，以便调整估计功率以解决SRS引起的不准确性。