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1. 发明授权

US06253172B1 Spectral transformation of acoustic signals 有权
标题翻译：声信号的频谱变换
公开(公告)号：US06253172B1
公开(公告)日：2001-06-26
申请号：US09153980
申请日：1998-09-16
申请人： Yinong Ding , Susan Yim , Alan V. McCree
发明人： Yinong Ding , Susan Yim , Alan V. McCree
IPC分类号： G10L1904
CPC分类号： G10L21/003 , G10L19/06
摘要： An improved method of providing a pitch shifted or frequency transformed signal includes frequency scaling the original signal (12) and generating a desired spectrum envelope of the frequency transformed signal, As(z) by LPC analysis of the original signal (11). Further the method includes producing an approximation of the spectrum envelope of the frequency scaled signal As(z, &bgr;) by performing LPC analysis on the original signal (11), obtaining LSFs (13), scaling (15) and transforming the scaled LSFs back to LPC (17). The spectrum envelope of the frequency scaled signal is whitened or flattened by the approximation of the spectrum of the frequency scaled signal and the desired spectrum envelope is added at filter (19) where the transfer characteristics of the filter is A s ⁡ ( z , β ) A s ⁡ ( z ) .
摘要翻译：提供音调偏移或频率变换信号的改进方法包括对原始信号（12）进行频率缩放，并通过原始信号（11）的LPC分析产生频率变换信号As（z）的期望频谱包络。此外，该方法包括通过对原始信号（11）执行LPC分析来产生频率标度信号As（z，β）的频谱包络的近似，获得LSF（13），缩放（15）并将缩放的LSF变换回到LPC（17）。频率标度信号的频谱包络通过频率标度信号的频谱的近似而变白或变平，并且滤波器（19）加上期望的频谱包络，其中滤波器的传输特性为

2. 发明授权

US08456991B2 Source and diversity rate less than a first transmission rate 有权
标题翻译：源和分集率小于第一传输速率
公开(公告)号：US08456991B2
公开(公告)日：2013-06-04
申请号：US12555485
申请日：2009-09-08
申请人： Vishu R. Viswanathan , Alan V. McCree , Krishnasamy Anandakumar
发明人： Vishu R. Viswanathan , Alan V. McCree , Krishnasamy Anandakumar
IPC分类号： H04J1/16 , H04L12/66 , H04L12/28 , H04L1/14
CPC分类号： H04L43/0829 , H04B7/06 , H04L29/06027 , H04L65/608 , H04L65/80 , H04W24/00 , H04W24/08 , H04W28/22 , H04W28/24
摘要： Packets of real-time information are sent with a source rate greater than zero kilobits per second, and a time or path or combined time/path diversity rate initially being zero kilobits per second. This results in a quality of service QoS, optionally measured at the sender or the receiver. When the QoS is on an unacceptable side of a threshold of acceptability, the sender sends diversity packets at an increased rate. Increasing the diversity rate while either reducing or maintaining the overall transmission rate is new. CELP-based multiple-description data partitioning sends the base or important information plus a subset of fixed excitation in one packet and sends the base or important information plus the complementary subset of fixed excitation in another packet. Reconstruction produces acceptable quality when only one of the two packets is received and better quality when both packets are received. Reconstruction provides for single and multiple lost packets.
摘要翻译：以大于零千比特/秒的源速率发送实时信息的分组，并且时间或路径或组合的时间/路径分集速率最初为零千比特每秒。这导致服务质量QoS，可选地在发送者或接收者处测量。当QoS处于可接受阈值的不可接受的一侧时，发送方以增加的速率发送分集分组。降低或维持整体传输速率的同时提高分集速度是新的。基于CELP的多描述数据分割在一个分组中发送基本或重要信息加上固定激励的子集，并将另一个分组中的基本或重要信息加上固定激励的互补子集发送。当接收到两个数据包时，仅接收到两个数据包中的一个并且更好的质量，重建将产生可接受的质量。重建提供单个和多个丢失的数据包。

3. 发明申请

US20120008645A1 SYSTEMS, PROCESSES AND INTEGRATED CIRCUITS FOR RATE AND/OR DIVERSITY ADAPTATION FOR PACKET COMMUNICATIONS 审中-公开
标题翻译：用于分组通信的速率和/或多样性适应的系统，过程和集成电路
公开(公告)号：US20120008645A1
公开(公告)日：2012-01-12
申请号：US13240512
申请日：2011-09-22
申请人： Krishnasamy Anandakumar , Vishu R. Viswanathan , Alan V. McCree
发明人： Krishnasamy Anandakumar , Vishu R. Viswanathan , Alan V. McCree
IPC分类号： H04L12/00
CPC分类号： H04L47/34 , H04B7/06 , H04B7/0671 , H04L1/0007 , H04L1/0018 , H04L29/06027 , H04L47/10 , H04L47/11 , H04L47/2416 , H04L47/283 , H04L47/29 , H04L65/602 , H04L65/80 , H04W28/08 , H04W28/22 , H04W28/24 , H04W84/00
摘要： A media over packet networking appliance provides a network interface, a voice transducer, and at least one integrated circuit assembly coupling the voice transducer to the network interface. The at least one integrated circuit assembly provides media over packet transmissions and holds bits defining reconstruction of a packet stream having a primary stage and a secondary stage. The secondary stage has one or more of linear predictive coding parameters, long term prediction lags, parity check, and adaptive and fixed codebook gains. The packet stream has an instance of single packet loss, and the reconstruction includes receiving a packet sequence represented by P(n)P(n−1)′, [Lost Packet], P(n+2)P(n+1)′, and P(n+3)P(n+2)′, obtaining as information from the secondary stage one or more of the linear predictive coding parameters, long term prediction lags, parity check, and adaptive and fixed codebook gains, and performing an excitation reconstruction utilizing said packet sequence thus received.
摘要翻译：分组网络设备上的媒体提供网络接口，语音传感器以及将语音传感器耦合到网络接口的至少一个集成电路组件。所述至少一个集成电路组件通过分组传输提供媒体，并保持限定具有初级阶段和次级阶段的分组流的重建的比特。次级具有一个或多个线性预测编码参数，长期预测滞后，奇偶校验以及自适应和固定码本增益。分组流具有单个分组丢失的实例，并且重构包括接收由P（n）P（n-1）'，[丢包]，P（n + 2）P（n + 1）表示的分组序列， '和P（n + 3）P（n + 2）'，获得来自次级信息的线性预测编码参数，长期预测滞后，奇偶校验和自适应和固定码本增益中的一个或多个信息，以及使用所接收的所述分组序列来执行激励重构。

4. 发明申请

US20100091800A1 INTEGRATED CIRCUITS, SYSTEMS, APPARATUS, PACKETS AND PROCESSES UTILIZING PATH DIVERSITY FOR MEDIA OVER PACKET APPLICATIONS 有权
标题翻译：集成电路，系统，设备，分组和处理使用分组应用程序中的媒体路径多样性
公开(公告)号：US20100091800A1
公开(公告)日：2010-04-15
申请号：US12638578
申请日：2009-12-15
申请人： Stephen J. Perkins , Alan Gatherer , Krishnasamy Anandakumar , Alan V. McCree , Vishu Viswanathan
发明人： Stephen J. Perkins , Alan Gatherer , Krishnasamy Anandakumar , Alan V. McCree , Vishu Viswanathan
IPC分类号： H04L29/02
CPC分类号： H04L41/08 , H04L29/06027 , H04L41/0206 , H04L41/024 , H04L41/12 , H04L45/00 , H04L45/24 , H04L45/56 , H04L47/2416 , H04L65/105 , H04L65/4076 , H04L65/602 , H04L65/605 , H04L65/80 , H04L67/14 , H04L69/40 , H04W28/04 , H04W40/02 , H04W40/20 , H04W40/246 , H04W84/042 , H04W88/08 , H04W88/14 , H04W88/16
摘要： In one form of the invention, a process of sending real-time information from a sender computer (103) to a receiver computer (105) coupled to the sender computer (103) by a packet network (100) wherein packets (111,113) sometimes become lost, includes steps of directing (441) packets (111) containing the real-time information from the sender computer (103) by at least one path (119) in the packet network (100) to the receiver computer (105), and directing packets (113) containing information dependent on the real-time information from the sender computer (103) by at least one path diversity path (117) in the packet network (100) to the same receiver computer (105). Other forms of the invention encompass other processes, improved packets and packet ensembles (111,113), integrated circuits (610), chipsets (DSP 1721, MCU), computer cards (1651), information storage articles (1511,1611), systems, computers (103,105), gateways (191,193), routers (131,133), cellular telephone handsets (181,189), wireless base stations (183,187), appliances (1721,1731,1741), and packet networks (100), and other forms as disclosed and claimed.
摘要翻译：在本发明的一种形式中，发送计算机（103）将实时信息发送到分组网络（100）耦合到发送方计算机（103）的接收机（105）的过程，其中分组（111,113）有时包括将包含来自发送者计算机（103）的实时信息的分组（441）通过分组网络（100）中的至少一个路径（119）引导到接收机计算机（105）的步骤，以及将分组网络（100）中的至少一个路径分集路径（117）包含取决于来自发送者计算机（103）的实时信息的信息的分组（113）导向到同一接收机计算机（105）。本发明的其他形式包括其他过程，改进的分组和分组集合（111,113），集成电路（610），芯片组（DSP1721，MCU），计算机卡（1651），信息存储产品（1511,1611），系统，计算机（103,105），网关（191,193），路由器（131,133），蜂窝电话手机（181,189），无线基站（183,187），设备（1721,1731,1741）和分组网络（100）声称。

5. 发明授权

US06744757B1 Private branch exchange systems for packet communications 有权
标题翻译：用于分组通信的专用分支交换系统
公开(公告)号：US06744757B1
公开(公告)日：2004-06-01
申请号：US09460065
申请日：1999-12-14
申请人： Krishnasamy Anandakumar , Vishu R. Viswanathan , Alan V. McCree
发明人： Krishnasamy Anandakumar , Vishu R. Viswanathan , Alan V. McCree
IPC分类号： H04L1266
CPC分类号： H04L45/24 , H04L45/00 , H04L47/10 , H04L47/29 , H04L65/80
摘要： A process (111,101) of sending packets of real-time information at a sender (311) includes steps of initially generating at the sender the packets of real-time information with a source rate (s11) greater than zero kilobits per second, and a time or path or combined time/path diversity rate (d11), the amount of diversity (d11) initially being at least zero kilobits per second. The process sends the packets, thereby resulting in a quality of service QoS, and optionally obtains at the sender (311) a measure of the QoS. Rate/diversity adaptation decision may be performed at receiver (361′) instead. Another step compares the QoS with a threshold of acceptability (Th1), and when the QoS is on an unacceptable side of said threshold (Th1) increases the diversity rate (d11 to d22) and sends not only additional ones of the packets of real-time information but also sends diversity packets at the diversity rate as increased (d22). Increasing the diversity rate (d11 to d22) while either reducing or keeping unchanged the overall transmission rate (sij+dij) is an important new improvement in even solely-time-diversity embodiments. In another form of the invention a single-chip integrated circuit includes a processor circuit (1511), and a rate-and-diversity control (1561). Here again, the diversity is contemplated to be time diversity, path diversity, and combined time/path diversity in various embodiments. Other embodiments disclosed encompass other processes, improved packets and packet ensembles, integrated circuits, chipsets, computer add-in cards, information storage articles, systems, computers, gateways, routers, cellular telephone handsets, wireless base stations, appliances, and packet networks, and other forms as claimed.
摘要翻译：在发送器（311）发送实时信息分组的过程（111,101）包括以下步骤：首先在发送器处产生具有大于零千比特/秒的源速率（s11）的实时信息分组，以及时间或路径或组合时间/路径分集速率（d11），分集量（d11）最初至少为零千比特每秒。该过程发送分组，从而导致服务质量QoS，并且可选地在发送方（311）获得QoS的度量。可以在接收机（361'）处执行速率/分集适配决定。另一步骤将QoS与可接受性阈值（Th1）进行比较，并且当QoS处于所述阈值（Th1）的不可接受侧时，增加分集速率（d11至d22），并且不仅发送实时时间信息，但也以多样化速率发送分集数据包（d22）。在降低或保持整体传输速率（sij + dij）的同时，增加分集率（d11至d22）是即使单时间多样性实施例中的重要新进展。在本发明的另一种形式中，单片集成电路包括处理器电路（1511）和速率分集控制（1561）。再次，在各种实施例中，分集被认为是时间分集，路径分集和组合的时间/路径分集。所公开的其他实施例包括其他过程，改进的分组和分组集合，集成电路，芯片组，计算机附加卡，信息存储产品，系统，计算机，网关，路由器，蜂窝电话手机，无线基站，设备和分组网络，和所要求的其他形式。

6. 发明授权

US6111181A Synthesis of percussion musical instrument sounds 失效
标题翻译：敲击乐器合成声音
公开(公告)号：US6111181A
公开(公告)日：2000-08-29
申请号：US72400
申请日：1998-05-04
申请人： Michael W. Macon , Wai-Ming Lai , Alan V. McCree , Vishu R. Viswanathan
发明人： Michael W. Macon , Wai-Ming Lai , Alan V. McCree , Vishu R. Viswanathan
IPC分类号： G10H1/12 , G10H7/00
CPC分类号： G10H1/125 , G10H7/00 , G10H2230/255 , G10H2250/065 , G10H2250/071 , G10H2250/075 , G10H2250/235 , G10H2250/601
摘要： A synthesis of percussion musical instruments sounds is provided using a microprocessor (17) that implements an all pole lattice filter and applying either a single impulse signal to the filter or N samples of an excitation signal sequence to the filter by a memory (19). The coefficients of the filter are determined by storing digital samples (501) of desired musical note from a desired percussion instrument, generating a Fourier transform to get a spectrum (502), picking the peaks of the spectrum (503) to select the most prominent components in the spectrum and determining wanted frequencies for decaying sine waves and for the frequencies finding the time envelope and estimating therefrom the pole radius.
摘要翻译：使用实现全极点格子的微处理器（17）提供打击乐器声音的合成，并且通过存储器（19）向滤波器施加单个脉冲信号或向滤波器施加激励信号序列的N个样本。通过从期望的打击乐器存储所需音符的数字样本（501）来确定滤波器的系数，产生傅立叶变换以获得频谱（502），拾取频谱的峰值（503）以选择最突出的确定频谱中的分量，并确定衰减正弦波的有用频率以及找到时间包络的频率，并从其估计极半径。

7. 发明授权

US5694426A Signal quantizer with reduced output fluctuation 失效
标题翻译：信号量化器，输出波动减小
公开(公告)号：US5694426A
公开(公告)日：1997-12-02
申请号：US487742
申请日：1995-06-07
申请人： Alan V. McCree , Vishu R. Viswanathan
发明人： Alan V. McCree , Vishu R. Viswanathan
IPC分类号： G10L19/00 , G10L19/06 , H04B14/04
CPC分类号： G10L19/012 , G10L19/06 , H04B14/046
摘要： A new signal quantization scheme is proposed which reduces fluctuation of the output signal by a signal quantizer (10) providing a quantized output signal and multiplying (18) said input signal X by a factor (1-w.sub.1) and finding a difference signal .DELTA..sub.in (11) between both the input signal and the previous input signal and multiplying (16) that by a weighting factor w.sub.2 from a control (13). The previous quantizer output signal Q.sub.prev is summed (17) with the weighted difference signal .DELTA..sub.in w.sub.2 and the sum is weighted by a weighting factor w.sub.1 at a multiplier (19) to yield w.sub.1 (Q.sub.prev +w.sub.2 .DELTA..sub.in). This signal is then summed at an adder (21) and applied to the quantizer (10) so that the quantizer is forced to match the fluctuation in the input signal as well as the signal itself. When applied to speech encoding algorithms such as the North American digital cellular telephone standard VSELP, the new quantizer results in more natural sounding background noise.
摘要翻译：提出了一种新的信号量化方案，其通过提供量化输出信号的信号量化器（10）减少输出信号的波动，并将所述输入信号X乘以因子（1-w1），并且找出差分信号DELTA （11），并且将来自控制器（13）的加权因子w2乘以（16）。先前的量化器输出信号Qprev与加权差信号DELTA inw2相加（17），并且在乘法器（19）处将加和加权加权因子w1加权，以产生w1（Qprev + w2 DELTA in）。然后将该信号在加法器（21）处相加并施加到量化器（10），使得量化器被迫匹配输入信号中的波动以及信号本身。当应用于诸如北美数字蜂窝电话标准VSELP的语音编码算法时，新的量化器导致更自然的声音背景噪声。

8. 发明申请

US20120259624A1 SYSTEMS, PROCESSES AND INTEGRATED CIRCUITS FOR RATE AND/OR DIVERSITY ADAPTATION FOR PACKET COMMUNICATIONS 有权
标题翻译：用于分组通信的速率和/或多样性适应的系统，过程和集成电路
公开(公告)号：US20120259624A1
公开(公告)日：2012-10-11
申请号：US13493548
申请日：2012-06-11
申请人： Krishnasamy Anandakumar , Vishu R. Viswanathan , Alan V. McCree
发明人： Krishnasamy Anandakumar , Vishu R. Viswanathan , Alan V. McCree
IPC分类号： G10L19/04
CPC分类号： G10L13/02 , G10L19/04 , H04L29/06027 , H04L65/608 , H04L65/80 , H04W88/02
摘要： Packets of real-time information are sent with a source rate greater than zero kilobits per second, and a time or path or combined time/path diversity rate initially being zero kilobits per second. This results in a quality of service QoS, optionally measured at the sender or the receiver. When the QoS is on an unacceptable side of a threshold of acceptability, the sender sends diversity packets at an increased rate. Increasing the diversity rate while either reducing or maintaining the overall transmission rate is new. CELP-based multiple-description data partitioning sends the base or important information plus a subset of fixed excitation in one packet and sends the base or important information plus the complementary subset of fixed excitation in another packet. Reconstruction produces acceptable quality when only one of the two packets is received and better quality when both packets are received. Reconstruction provides for single and multiple lost packets.
摘要翻译：以大于零千比特/秒的源速率发送实时信息的分组，并且时间或路径或组合的时间/路径分集速率最初为零千比特每秒。这导致服务质量QoS，可选地在发送者或接收者处测量。当QoS处于可接受阈值的不可接受的一侧时，发送方以增加的速率发送分集分组。降低或维持整体传输速率的同时提高分集速度是新的。基于CELP的多描述数据分割在一个分组中发送基本或重要信息加上固定激励的子集，并将另一个分组中的基本或重要信息加上固定激励的互补子集发送。当接收到两个数据包时，仅接收到两个数据包中的一个并且更好的质量，重建会产生可接受的质量。重建提供单个和多个丢失的数据包。

9. 发明授权

US07653045B2 Reconstruction excitation with LPC parameters and long term prediction lags 有权
标题翻译： LPC参数重建激励与长期预测滞后
公开(公告)号：US07653045B2
公开(公告)日：2010-01-26
申请号：US10885911
申请日：2004-07-06
申请人： Krishnasamy Anandakumar , Vishu R. Viswanathan , Alan V. McCree
发明人： Krishnasamy Anandakumar , Vishu R. Viswanathan , Alan V. McCree
IPC分类号： H04L12/66
CPC分类号： H04L47/34 , H04B7/06 , H04B7/0671 , H04L1/0007 , H04L1/0018 , H04L29/06027 , H04L47/10 , H04L47/11 , H04L47/2416 , H04L47/283 , H04L47/29 , H04L65/602 , H04L65/80 , H04W28/08 , H04W28/22 , H04W28/24 , H04W84/00
摘要： A media over packet networking appliance provides a network interface, a voice transducer, and at least one integrated circuit assembly coupling the voice transducer to the network interface. The at least one integrated circuit assembly provides media over packet transmissions and holds bits defining reconstruction of a packet stream having a primary stage and a secondary stage. The secondary stage has one or more of linear predictive coding parameters, long term prediction lags, parity check, and adaptive and fixed codebook gains. The packet stream has an instance of single packet loss, and the reconstruction includes receiving a packet sequence represented by P(n)P(n−1)′, [Lost Packet], P(n+2)P(n+1)′, and P(n+3)P(n+2)′, obtaining as information from the secondary stage one or more of the linear predictive coding parameters, long term prediction lags, parity check, and adaptive and fixed codebook gains, and performing an excitation reconstruction utilizing said packet sequence thus received.
摘要翻译：分组网络设备上的媒体提供网络接口，语音传感器以及将语音传感器耦合到网络接口的至少一个集成电路组件。所述至少一个集成电路组件通过分组传输提供媒体，并保持限定具有初级阶段和次级阶段的分组流的重建的比特。次级具有一个或多个线性预测编码参数，长期预测滞后，奇偶校验以及自适应和固定码本增益。分组流具有单个分组丢失的实例，并且重构包括接收由P（n）P（n-1）'，[丢包]，P（n + 2）P（n + 1）表示的分组序列， '和P（n + 3）P（n + 2）'，获得来自次级信息的线性预测编码参数，长期预测滞后，奇偶校验和自适应和固定码本增益中的一个或多个的信息，以及使用所接收的所述分组序列来执行激励重构。

10. 发明授权

US07643630B2 Echo suppression with increment/decrement, quick, and time-delay counter updating 有权
标题翻译：回波抑制与增量/减量，快速和延时计数器更新
公开(公告)号：US07643630B2
公开(公告)日：2010-01-05
申请号：US11165897
申请日：2005-06-24
申请人： Alan V. McCree , Takahiro Unno , Thierry LeGall , Sebastien Guiriec
发明人： Alan V. McCree , Takahiro Unno , Thierry LeGall , Sebastien Guiriec
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： Hands-free phones with voice activity detection using a comparison of frame power estimate with an adaptive frame noise power estimate, automatic gain control with fast adaptation and minimal speech distortion, echo cancellation updated in the frequency domain with stepsize optimization and smoothed spectral whitening, and echo suppression with adaptive talking-state transitions.
摘要翻译：使用帧功率估计与自适应帧噪声功率估计的比较，具有快速适应的自动增益控制和最小语音失真的具有语音活动检测的免提电话，在频域中更新的逐步优化和平滑频谱白化的回波消除，以及回声抑制与自适应通话状态转换。

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