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1. 发明授权

US6011846A Methods and apparatus for echo suppression 失效
标题翻译：用于回波抑制的方法和装置
公开(公告)号：US6011846A
公开(公告)日：2000-01-04
申请号：US881062
申请日：1997-06-24
申请人： Rafi Rabipour , Dominic Ho , Majid Foodeei , Madeleine Saikaly
发明人： Rafi Rabipour , Dominic Ho , Majid Foodeei , Madeleine Saikaly
IPC分类号： G10L21/02 , H04B3/20 , H04B7/015 , G10L9/00
CPC分类号： H04B7/015 , H04B3/20 , G10L2021/02082
摘要： In methods and apparatus for suppressing echo of a far end signal encoded using LPC-based compression in a near end signal encoded using LPC-based compression, parameters of each frame of the near end encoded signal are processed without synthesizing a speech signal from the near end encoded signal to determine whether sufficient echo to merit echo suppression is present in the frame. Upon determining that insufficient echo to merit echo suppression is present in the frame, the parameters of the frame are passed unmodified. Upon determining that sufficient echo to merit echo suppression is present in said frame, the parameters of the frame are modified without synthesizing a speech signal to suppress echo in the frame. The methods and apparatus are particularly suitable in codec bypass applications.
摘要翻译：在使用基于LPC的压缩编码的近端信号中抑制使用基于LPC的压缩编码的远端信号的回波的方法和装置中，处理近端编码信号的每帧的参数，而不从近端结束编码信号以确定帧中是否存在足以有效回波抑制的回波。在确定帧中存在不足以获得回波抑制的回波的情况下，帧的参数未被修改。在确定在所述帧中存在足够的回波以获得回波抑制的情况下，修改帧的参数而不合成语音信号以抑制帧中的回波。该方法和装置特别适用于编解码器旁路应用。

2. 发明授权

US5943645A Method and apparatus for computing measures of echo 失效
标题翻译：用于计算回波测量的方法和装置
公开(公告)号：US5943645A
公开(公告)日：1999-08-24
申请号：US847527
申请日：1997-04-24
申请人： Dominic Ho , Rafi Rabipour , Majid Foodeei
发明人： Dominic Ho , Rafi Rabipour , Majid Foodeei
IPC分类号： H04B3/20 , H04M9/08
CPC分类号： H04B3/20
摘要： In methods and apparatus for computing measures of echo of a far end signal in a near end signal, the evolution over time of frequency spectra of the near end and far end signals are compared to compute a measure of the echo. A far end spectrum of the far end signal and a near end spectrum of the near end signal are determined for each of a plurality of successive time intervals. A respective measure of correlation is determined for each of a plurality of spectrum pairs, each spectrum pair comprising a respective near end spectrum and a respective far end spectrum, the far end spectrum corresponding to a time interval which lags a time interval corresponding to the near end spectrum by a respective time lag. The measures of correlation are compared to determine a maximum measure of correlation which can be used as a measure of echo. The echo measure computation technique is particularly suitable for use in echo suppressors for digital cellular telephony systems, but has other applications.
摘要翻译：在近端信号中用于计算远端信号的回波测量的方法和装置中，比较近端和远端信号的频谱随着时间的演变，以计算回波的测量。为多个连续时间间隔中的每一个确定远端信号的远端频谱和近端信号的近端频谱。对于多个频谱对中的每一个确定相关的相关度量，每个频谱对包括相应的近端频谱和相应的远端频谱，远端频谱对应于滞后于与近距离对应的时间间隔的时间间隔结束频谱由相应的时间延迟。比较相关度的方法来确定可用作回波测量值的最大相关度量度。回波测量计算技术特别适用于数字蜂窝电话系统的回波抑制器，但具有其他应用。

3. 发明授权

US5893056A Methods and apparatus for generating noise signals from speech signals 失效
标题翻译：用于从语音信号产生噪声信号的方法和装置
公开(公告)号：US5893056A
公开(公告)日：1999-04-06
申请号：US839830
申请日：1997-04-17
申请人： Madeleine Saikaly , Rafi Rabipour
发明人： Madeleine Saikaly , Rafi Rabipour
IPC分类号： G10L19/00 , G10L19/06 , H04B3/20 , G10L9/00
CPC分类号： G10L19/012 , H04B3/20 , G10L19/06
摘要： In methods and apparatus for generating an LPC-encoded noise signal from an LPC-encoded speech signal, excitation parameters of the LPC-encoded speech signal for a current frame are randomized upon detection of speech in the current frame. For frames in which no speech is detected, LPC coefficients and frame energy for the current frame may be replaced with respective averages calculated over the current frame and a plurality of preceding frames. For frames in which speech is detected, LPC coefficients for the current frame may be replaced with respective averages of LPC coefficients used to replace LPC coefficients of an immediately previous frame. The comfort noise generation technique is particularly suitable for use in echo suppressors for digital cellular radio systems.
摘要翻译：在用于从LPC编码的语音信号产生LPC编码的噪声信号的方法和装置中，当前帧的LPC编码语音信号的激励参数在检测到语音时被随机化。对于其中没有检测到语音的帧，可以用当前帧和多个先前帧计算的相应平均值替换当前帧的LPC系数和帧能量。对于其中检测到语音的帧，可以用用于替换紧接在前的帧的LPC系数的LPC系数的相应平均值来替换当前帧的LPC系数。舒适噪声产生技术特别适用于数字蜂窝无线电系统的回波抑制器。

4. 发明授权

US09098331B2 Joint scheduling of multiple processes on a shared processor 有权
标题翻译：在共享处理器上联合调度多个进程
公开(公告)号：US09098331B2
公开(公告)日：2015-08-04
申请号：US13171848
申请日：2011-06-29
申请人： Chung Cheung Chu , Rafi Rabipour , Djordje Konforti
发明人： Chung Cheung Chu , Rafi Rabipour , Djordje Konforti
IPC分类号： G06F9/46 , G06F9/48 , H04L12/70
CPC分类号： G06F9/4887 , H04L47/00
摘要： A multi-process scheduler applies a joint optimization criterion to jointly schedule multiple processes executed on a shared processor. The scheduler determines, for each one of a plurality of processes having a predetermined processing time, at least one of an expected arrival time for input data and required delivery time for output data. The scheduler jointly determines process activation times for the processes based on said arrival/delivery, and the processing times, to meet a predetermined joint optimization criterion for the processes. The processes are scheduled on the shared processor according to the jointly determined activation times to minimize queuing delay.
摘要翻译：多进程调度器应用联合优化标准来共同调度在共享处理器上执行的多个进程。对于具有预定处理时间的多个处理中的每一个，调度器确定输入数据的预期到达时间和输出数据的所需传送时间中的至少一个。调度器基于所述到达/传送和处理时间联合确定用于进程的处理激活时间，以满足用于处理的预定联合优化准则。这些进程根据联合确定的激活时间在共享处理器上调度以最小化排队延迟。

5. 发明申请

US20130046534A1 MECHANISM FOR DYNAMIC SIGNALING OF ENCODER CAPABILITIES 有权
标题翻译：编码器功能动态信号的机制
公开(公告)号：US20130046534A1
公开(公告)日：2013-02-21
申请号：US13588445
申请日：2012-08-17
申请人： Rafi Rabipour , Chung-Cheung Chu , Daniel Cohn
发明人： Rafi Rabipour , Chung-Cheung Chu , Daniel Cohn
IPC分类号： G10L19/12
CPC分类号： H04M7/0072 , G10L19/00 , H04L65/1059 , H04L65/608 , H04W28/18 , H04W88/181
摘要： The present disclosure provides systems and methods for dynamically signaling encoder capabilities of vocoders of corresponding communication nodes. In one embodiment, during a call between a first communication node and a second communication node, a control node (e.g., base station controller or mobile switching center) for the first communication node sends capability information for a voice encoder of a vocoder of the first communication node to a control node for the second communication node. As a result, the second communication node is enabled to select and request a preferred encoder mode for the voice encoder of the vocoder of the first communication node based on the capabilities of the voice encoder of the vocoder of the first communication node.
摘要翻译：本公开提供用于动态地信令相应通信节点的声码器的编码器能力的系统和方法。在一个实施例中，在第一通信节点和第二通信节点之间的呼叫期间，用于第一通信节点的控制节点（例如，基站控制器或移动交换中心）发送用于第一通信节点的声码器的语音编码器的能力信息通信节点到第二通信节点的控制节点。结果，第二通信节点能够基于第一通信节点的声码器的语音编码器的能力来选择并请求第一通信节点的声码器的语音编码器的优选编码器模式。

6. 发明申请

US20130007754A1 Joint Scheduling of Multiple Processes on a Shared Processor 有权
标题翻译：共享处理器上多个进程的联合调度
公开(公告)号：US20130007754A1
公开(公告)日：2013-01-03
申请号：US13171848
申请日：2011-06-29
申请人： Chung Cheung Chu , Rafi Rabipour , Djordje Konforti
发明人： Chung Cheung Chu , Rafi Rabipour , Djordje Konforti
IPC分类号： G06F9/46
CPC分类号： G06F9/4887 , H04L47/00
摘要： A multi-process scheduler applies a joint optimization criterion to jointly schedule multiple processes executed on a shared processor. The scheduler determines, for each one of a plurality of processes having a predetermined processing time, at least one of an expected arrival time for input data and required delivery time for output data. The scheduler jointly determines process activation times for the processes based on said arrival/delivery, and the processing times, to meet a predetermined joint optimization criterion for the processes. The processes are scheduled on the shared processor according to the jointly determined activation times to minimize queuing delay.
摘要翻译：多进程调度器应用联合优化标准来共同调度在共享处理器上执行的多个进程。对于具有预定处理时间的多个处理中的每一个，调度器确定输入数据的预期到达时间和输出数据的所需传送时间中的至少一个。调度器基于所述到达/传送和处理时间联合确定用于进程的处理激活时间，以满足用于处理的预定联合优化准则。这些进程根据联合确定的激活时间在共享处理器上调度以最小化排队延迟。

7. 发明申请

US20090046698A1 METHOD AND APPARATUS FOR TIME ALIGNMENT ALONG A MULTI-NODE COMMUNICATION LINK 有权
标题翻译：多节点通信链路上时间对齐的方法与装置
公开(公告)号：US20090046698A1
公开(公告)日：2009-02-19
申请号：US11839861
申请日：2007-08-16
申请人： Chung Cheung CHU , Rafi Rabipour
发明人： Chung Cheung CHU , Rafi Rabipour
IPC分类号： H04J3/06
CPC分类号： H04L12/66 , H04N21/2335 , H04N21/23805 , H04N21/6181 , H04N21/64307 , H04N21/64322
摘要： A network entity, which comprises an input configured to receive from an upstream network entity a stream of first media data elements; an output configured to release towards a downstream network entity a stream of second media data elements; a processing engine configured to effect processing tasks on the first media data elements, thereby to generate the second media data elements, the processing tasks being effected in a set of processing intervals; and a control entity. The control entity is configured for receiving a request for a first phase adjustment from the downstream network entity; modifying the set of processing intervals in which are effected the processing tasks in an attempt to accommodate the first phase adjustment; determining a second phase adjustment based on arrival characteristics of the first media data elements and the modified set of processing intervals; and releasing towards the upstream network entity a request for the second phase adjustment.
摘要翻译：网络实体，其包括被配置为从上游网络实体接收第一媒体数据元素流的输入; 被配置为向下游网络实体释放第二媒体数据元素流的输出; 处理引擎被配置为对所述第一媒体数据元素执行处理任务，从而生成所述第二媒体数据元素，所述处理任务在一组处理间隔中进行; 和控制实体。控制实体被配置为从下游网络实体接收对第一阶段调整的请求; 修改处理间隔的集合，以试图适应第一阶段调整; 基于所述第一媒体数据元素的到达特性和所述经修改的处理间隔集确定第二相位调整; 向上游网络实体发布第二阶段调整请求。

8. 发明授权

US06185424B2 System for TDMA mobile-to-mobile VSELP CODEC bypass 失效
标题翻译：用于TDMA移动到移动VSELP CODEC旁路的系统
公开(公告)号：US06185424B2
公开(公告)日：2001-02-06
申请号：US09096192
申请日：1998-06-12
申请人： Hermon Pon , Rafi Rabipour , Chung-Cheung Chu
发明人： Hermon Pon , Rafi Rabipour , Chung-Cheung Chu
IPC分类号： H04Q722
CPC分类号： H04W88/181 , H04M3/002 , H04M3/40 , H04M7/12 , H04M2207/18 , H04M2207/20 , H04Q2213/13031 , H04Q2213/13034 , H04Q2213/13098 , H04Q2213/1319 , H04Q2213/13292
摘要： In a TDMA mobile-to-mobile connection, the end-to-end audio signal quality as well as system performance can be improved by providing digital signal processors the capability to automatically switch configuration such that each digital signal processor in a mobile-to-mobile communication connection can automatically identify a TDMA mobile-to-mobile connection and bypass the speech encoding and decoding processes within the digital signal processors. The two digital signal processors are virtually connected at the channel codecs.
摘要翻译：在TDMA移动到移动连接中，可以通过向数字信号处理器提供自动切换配置的能力来提高端对端音频信号质量以及系统性能，使得每个数字信号处理器以移动 - 移动通信连接可以自动识别TDMA移动到移动连接并且绕过数字信号处理器内的语音编码和解码过程。两个数字信号处理器在通道编解码器上虚拟连接。

9. 发明授权

US5768308A System for TDMA mobile-to-mobile VSELP codec bypass 失效
标题翻译：用于TDMA移动到移动VSELP编解码器旁路的系统
公开(公告)号：US5768308A
公开(公告)日：1998-06-16
申请号：US358949
申请日：1994-12-19
申请人： Hermon Pon , Rafi Rabipour , Chung-Cheung Chu
发明人： Hermon Pon , Rafi Rabipour , Chung-Cheung Chu
IPC分类号： G10L19/00 , H04B7/26 , H04J3/00 , H04M3/00 , H04M3/40 , H04M7/12 , H04W88/18 , H04Q7/00
CPC分类号： H04W88/181 , H04M3/40 , H04M2207/18 , H04M2207/20 , H04M3/002 , H04M7/12 , H04Q2213/13031 , H04Q2213/13034 , H04Q2213/13098 , H04Q2213/1319 , H04Q2213/13292
摘要： In a TDMA mobile-to-mobile connection, the end-to-end audio signal quality as well as system performance can be improved by providing digital signal processors the capability to automatically switch configuration such that each digital signal processor in a mobile-to-mobile communication connection can automatically identify a TDMA mobile-to-mobile connection and bypass the speech encoding and decoding processes within the digital signal processors. The two digital signal processors are virtually connected at the channel codecs.
摘要翻译：在TDMA移动到移动连接中，可以通过向数字信号处理器提供自动切换配置的能力来提高端对端音频信号质量以及系统性能，使得每个数字信号处理器以移动 - 移动通信连接可以自动识别TDMA移动到移动连接并且绕过数字信号处理器内的语音编码和解码过程。两个数字信号处理器在通道编解码器上虚拟连接。

10. 发明授权

US5577117A Methods and apparatus for estimating and adjusting the frequency response of telecommunications channels 失效
标题翻译：用于估计和调整电信频道频率响应的方法和装置
公开(公告)号：US5577117A
公开(公告)日：1996-11-19
申请号：US257129
申请日：1994-06-09
申请人： Rafi Rabipour , Vasu Iyengar
发明人： Rafi Rabipour , Vasu Iyengar
IPC分类号： H04B3/06 , H04R29/00
CPC分类号： H04B3/06 , H04L25/03885
摘要： In methods and apparatus for estimating the frequency response of telecommunications channels, signals carried on the channels are divided into pluralities of signal segments of limited duration, unvoiced signal segments are identified, and spectral components of the unvoiced signal segments are measured. The measured spectral components may be integrated over time to derive time-averaged measurements of the spectral components. The time-averaged measurements may be compared to corresponding components of expected unvoiced signal spectra to improve the accuracy of the frequency response estimates. Filters may be inserted in the channels to adjust the frequency responses, the filters having filter characteristics selected in response to the measured spectral components. The methods and apparatus can be used to compensate for poor bass frequency response in voice channels.
摘要翻译：在用于估计电信信道的频率响应的方法和装置中，在信道上承载的信号被划分成多个有限持续时间的信号段，识别清音信号段，并且测量清音信号段的频谱分量。测量的光谱分量可以随时间积分以导出光谱分量的时间平均测量。可以将时间平均测量值与预期清音信号频谱的相应分量进行比较，以提高频率响应估计的准确度。可以将滤波器插入通道中以调整频率响应，滤波器具有响应于测量的频谱分量而选择的滤波器特性。方法和装置可用于补偿语音信道中的低音低频响应。

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