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1.发明授权Performance enhancement of tone detection and FSK detection using hybrid echo cancellation 失效使用混合回波消除的音调检测和FSK检测的性能增强
公开(公告)号：US5943407A
公开(公告)日：1999-08-24
申请号：US991482
申请日：1997-12-16
CPC分类号： H04M1/573
摘要： Type 2 caller ID/call waiting (CIDCW) customer premises equipment (CPE) is provided which has a greatly improved method of detecting tones indicating the availability of call information regarding an incoming call while the customer premises equipment is in an off-hook condition. A hybrid echo canceler (HEC) algorithm is added to the customer premises equipment (CPE) to suppress the signal from the microphone of the customer premises equipment from being included in the signal analyzed for the presence of tones. Thus, the microphone of the customer premises equipment need not be muted upon detection of the alerting CAS tone sequence in a Caller ID service. The HEC algorithm runs substantially continuously in a preferred embodiment, and may be combined with a conventionally operating HEC which cancels reflections due to the hybrid or telephone line interface.
摘要翻译： 提供了类型2呼叫者ID /呼叫等待（CIDCW）客户驻地设备（CPE），其具有大大改进的方法，用于在客户驻地设备处于摘机状态时检测指示有关来电的呼叫信息的可用性的音调。 将混合回波消除器（HEC）算法添加到客户驻地设备（CPE）中以抑制来自客户驻地设备的麦克风的信号被包括在分析为存在音调的信号中。 因此，在呼叫者ID服务中检测到警报CAS音调序列时，客户端设备的麦克风不需要被静音。 HEC算法在优选实施例中基本连续地运行，并且可以与常规操作的HEC组合，其消除由于混合或电话线路接口引起的反射。
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公开(公告)号：US06366670B1
公开(公告)日：2002-04-02
申请号：US09058203
申请日：1998-04-10
IPC分类号： H04M100
摘要： An adjunct Type II caller ID/call waiting (CIDCW) receiver unit is provided which has a greatly improved ability to detect tones and other call related information on a telephone line from a central office while the customer premises equipment is in an off-hook condition. The inventive adjunct CIDCW receiver unit is placed in series between the telephone line from the central office and the customer premises equipment, rather than in parallel with the customer premises equipment as in conventional adjunct CIDCW receiver units. A second telephone line interface (TLI) is included in the adjunct CIDCW receiver unit for connection to the customer premises unit to simulate the impedance of the telephone line. The adjunct CIDCW receiver unit has the ability to disconnect, mute or suppress the microphone signal from the customer premises equipment from being included in the signal received by the call related information receiver portion of the adjunct CIDCW receiver unit.
摘要翻译： 提供附件II型呼叫者ID /呼叫等待（CIDCW）接收机单元，其具有在客户驻地设备处于摘机状态时从中心局检测电话线上的音调和其他呼叫相关信息的能力大大提高的能力 。 本发明的附属CIDCW接收器单元串联在来自中心局的电话线路和客户驻地设备之间，而不是像传统的辅助CIDCW接收器单元那样与客户驻地设备并行放置。 附加CIDCW接收器单元中包括第二电话线接口（TLI），用于连接到客户驻地单元以模拟电话线路的阻抗。 辅助CIDCW接收器单元具有断开，静音或抑制来自客户驻地设备的麦克风信号被包括在由附加CIDCW接收器单元的呼叫相关信息接收器部分接收的信号中的能力。
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公开(公告)号：US07224794B1
公开(公告)日：2007-05-29
申请号：US09394097
申请日：1999-09-13
IPC分类号： H04M1/00
CPC分类号： H04M1/6033 , H04M1/642 , H04M1/652 , H04M9/082
摘要： A digital telephone answering device having speakerphone capability allows a recorded message to be played back and heard by the far-end party as well as over the local speakerphone by the near-end party during speakerphone operation as if it were a normal receive signal. Moreover, normal speakerphone conversation is possible during this conversational playback mode allowing the far-end party and/or near-end party to break-in over the played back pre-recorded message as desired and be heard by the other party. Both message and conversation signals are preferably (but not necessarily) at similar levels. Also, the message playback at the near end is preferably (but not necessarily) subject to the same speakerphone digital volume control as that received at the far end.
摘要翻译： 具有扬声器功能的数字电话应答设备允许在扬声器操作期间由远端方以及近端方在本地扬声器电话上播放并听到所记录的消息，就像它是正常接收信号一样。 此外，在该对话回放模式期间，正常的免提电话会话是可能的，允许远端方和/或近端方根据需要插入播放的预先录制的消息，并由另一方听到。 消息和会话信号两者都是相似的（但不一定）。 此外，近端的消息回放优选（但不一定）经受与远端接收的相同的扬声器数字音量控制。
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公开(公告)号：US07233659B1
公开(公告)日：2007-06-19
申请号：US09394096
申请日：1999-09-13
IPC分类号： H04M1/00
CPC分类号： H04M1/6033 , H04M1/652 , H04M9/082
摘要： A digital telephone answering device having speakerphone capability allows a recorded message to be played back and heard by the far-end party as well as over the local speakerphone by the near-end party during speakerphone operation as if it were a normal receive signal. Moreover, normal speakerphone conversation is possible during this conversational playback mode allowing the far-end party and/or near-end party to break-in over the played back pre-recorded message as desired and be heard by the other party. Both message and conversation signals are preferably (but not necessarily) at similar levels. Also, the message playback at the near end is preferably (but not necessarily) subject to the same speakerphone digital volume control as that received at the far end.
摘要翻译： 具有扬声器功能的数字电话应答设备允许在扬声器操作期间由远端方以及近端方在本地扬声器电话上播放并听到所记录的消息，就像它是正常接收信号一样。 此外，在对话回放模式期间，正常的免提电话会话是可能的，允许远端方和/或近端方根据需要插入播放的预录消息，并被对方听到。 消息和会话信号两者都是相似的（但不一定）。 此外，近端的消息回放优选（但不一定）经受与远端接收的相同的扬声器数字音量控制。
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公开(公告)号：US06385176B1
公开(公告)日：2002-05-07
申请号：US09090733
申请日：1998-06-04
申请人： Vasu Iyengar , James Charles Popa
发明人： Vasu Iyengar , James Charles Popa
IPC分类号： H04B320
摘要： A controller and a method for controlling the amount of loss in signal paths of a communication system are disclosed. The method includes sampling the impulse response of an echo cancelling circuit, detecting an abnormal signal condition by comparing the impulse response to a reference, and inserting loss into a first signal path when an abnormal signal condition is detected. One controller configuration for adjusting the amount of loss in the signal paths of a communication system has an adjustable attenuator in the signal path having a control signal input, a memory element which stores a reference, and a comparator having one input connected to the memory of the echo canceler circuit which samples the impulse response, another input connected to the memory which stores the reference, and an output connected to the control signal input of the attenuator. Another controller configuration has a program running on a digital signal processor within the communication system, with the program analyzing the impulse response of the echo canceler so as to generate a control signal, and a call programmable gain attenuator in the signal path which is responsive to the control signal from the program to selectively insert or remove loss into the signal path.
摘要翻译： 公开了一种用于控制通信系统的信号路径损失量的控制器和方法。 该方法包括采样回波消除电路的脉冲响应，通过将脉冲响应与参考值进行比较来检测异常信号状态，以及当检测到异常信号条件时将损耗插入第一信号路径。 用于调整通信系统的信号路径中的损耗量的一个控制器配置在具有控制信号输入的信号路径中具有可调衰减器，存储参考的存储元件和具有连接到存储器 对脉冲响应进行采样的回波抵消器电路，连接到存储基准的存储器的另一个输入端以及连接到衰减器的控制信号输入端的输出。 另一个控制器配置具有在通信系统内的数字信号处理器上运行的程序，程序分析回波消除器的脉冲响应以产生控制信号，以及响应于信号路径的信号路径中的呼叫可编程增益衰减器 来自程序的控制信号选择性地将损失插入或移除到信号路径中。
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公开(公告)号：US06546241B2
公开(公告)日：2003-04-08
申请号：US09431853
申请日：1999-11-02
IPC分类号： H04Q720
CPC分类号： H04M1/6505 , H04M1/72519 , H04W4/12 , H04W88/02
摘要： In one embodiment according to the invention, a digital cordless telephone includes a base unit adapted to couple to a telephone network, to transmit an outgoing message to an incoming caller, to store a digital message from the incoming caller, and to transmit and receive digital samples over an RF link. The digital cordless telephone of this embodiment also includes a handset adapted to transmit and receive digital samples over the RF link. According to this embodiment, the base unit and handset are further adapted to enable a user to monitor the stored digital message from the handset. In an alternative embodiment according to the invention, a method of accessing a digital message stored in one of a base unit and a handset of a cordless telephone from the other of the base unit and the handset includes the steps of transmitting a control signal from the accessing device to the storing device, retrieving the digital message, in encoded form, from a memory in the storing device, and transmitting at least a portion thereof to the accessing device. The method further includes the step of decoding the encoded digital message in the accessing device.
摘要翻译： 在根据本发明的一个实施例中，数字无绳电话包括适于耦合到电话网络的基本单元，用于向输入呼叫者发送输出消息，以存储来自呼叫者的数字消息，以及发送和接收数字 RF链路上的样本。 该实施例的数字无绳电话还包括适于通过RF链路发送和接收数字样本的手持机。 根据该实施例，基本单元和手机还适于使用户能够从手机监视所存储的数字消息。 在根据本发明的替代实施例中，从基本单元和手机中的另一个访问存储在无绳电话的基本单元和手机中的一个中的数字消息的方法包括以下步骤：从 访问设备到存储设备，以编码形式从存储设备中的存储器检索数字消息，并将其至少一部分传送到访问设备。 该方法还包括对接入设备中的编码数字消息进行解码的步骤。
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公开(公告)号：US06745055B1
公开(公告)日：2004-06-01
申请号：US09511153
申请日：2000-02-23
申请人： Vasu Iyengar , James Charles Popa
发明人： Vasu Iyengar , James Charles Popa
IPC分类号： H04B138
CPC分类号： H04M1/72502 , H04M1/6033
摘要： A digital cordless telephone combines speakerphone control information together with voice data information in each of a plurality of data packets transmitted between the remote handset and the base unit while the remote handset is operating in a speakerphone mode. To allow half-duplex speakerphone functionality in the digital remote handset, the speakerphone control information includes break-in information relating to a break in by the user of the remote handset into an ongoing conversation. To allow full-duplex, echo cancellation mode operation of the speakerphone functionality at the digital remote handset, the speakerphone control information includes coordinating information relating to an amount of echo cancellation performed by the base unit and by the remote handset. In the disclosed embodiment, the speakerphone control information further includes switching and signal level information.
摘要翻译： 数字无绳电话将扬声器控制信息与语音数据信息组合在一起，在遥控手机以扬声器模式操作的同时，在远程手机和基座单元之间传输的多个数据分组中的每一个中。 为了允许数字远程手机中的半双工免提电话功能，扬声器控制信息包括与远程手机的用户断开进入正在进行的对话中的突发信息。 为了允许在数字远程手机上进行免提电话功能的全双工回声消除模式操作，扬声器电话控制信息包括与基本单元和远程手机执行的回声消除量有关的协调信息。 在所公开的实施例中，扬声器电话控制信息还包括切换和信号电平信息。
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