Systems and Methods for Implementing a Double Precision Arithmetic Memory Architecture
    1.
    发明申请
    Systems and Methods for Implementing a Double Precision Arithmetic Memory Architecture 审中-公开
    实现双精度算术内存架构的系统和方法

    公开(公告)号:US20080046497A1

    公开(公告)日:2008-02-21

    申请号:US11840547

    申请日:2007-08-17

    IPC分类号: G06F7/38 G06F1/16

    CPC分类号: G06F7/5324 G06F2207/382

    摘要: Systems and methods for a memory structure are described for increasing the throughput of double precision operations. Broadly, the present invention utilizes a novel memory system to process double precision data in a single memory access. In accordance with one embodiment, a method for increasing throughput of arithmetic operations on double precision data by reducing the number of memory accesses comprising: retrieving a double precision value from a memory, wherein the double precision value is comprised of a high word and a low word, wherein the double precision value is retrieved in a single memory access; selecting a word within the double precision value, wherein the portion selected is a single precision value; multiplying the word with a single precision operand to generate a single precision product; adding the product to a double precision operand to produce a double precision result; and forwarding the double precision result back to memory for storage.

    摘要翻译: 描述了用于增加双精度操作的吞吐量的存储器结构的系统和方法。 广义上,本发明利用一种新颖的存储器系统来处理单个存储器访问中的双精度数据。 根据一个实施例,一种用于通过减少存储器访问的数量来增加对双精度数据的算术运算的吞吐量的方法,包括:从存储器检索双精度值,其中双精度值由高字和低字组成 单词,其中在单个存储器访问中检索所述双精度值; 选择双精度值内的单词,其中所选择的部分是单精度值; 将单词与单精度操作数相乘以生成单精度乘积; 将产品添加到双精度操作数以产生双精度结果; 并将双精度结果转发回存储器进行存储。

    System and method for echo cancellation over asymmetric spectra
    2.
    发明授权
    System and method for echo cancellation over asymmetric spectra 有权
    用于不对称光谱回波消除的系统和方法

    公开(公告)号:US06421377B1

    公开(公告)日:2002-07-16

    申请号:US09164552

    申请日:1998-10-01

    IPC分类号: H04B138

    CPC分类号: H04B3/23 H04L27/2647

    摘要: The present invention generally relates to echo cancellation over an asymmetric transmission and receiving spectra. An apparatus is provided having a transmit path and a receive path, with an adaptive echo canceler disposed therebetween, for communicating data within a first bandwidth and a second bandwidth respectively. A first decimator is disposed between the transmit path and the echo canceler circuit and filters an incoming signal having a first sampling rate and emits a signal output at a second, reduced sampling rate. A second decimator is disposed along said receive path and filters an incoming signal and emits a signal output at a reduced sampling rate. An adder is disposed to subtract the output of the adaptive echo canceler from output of the second decimator to generate a received signal that is substantially free of echo.

    摘要翻译: 本发明一般涉及不对称传输和接收光谱的回波消除。 提供一种具有发送路径和接收路径的装置,其间设置有自适应回波消除器,用于分别在第一带宽和第二带宽内传送数据。 第一抽取器设置在发射路径和回波抵消器电路之间,并且对具有第一采样率的输入信号进行滤波,并以第二次降低的采样率发射信号输出。 沿着所述接收路径设置第二抽取器,并且对输入信号进行滤波并以降低的采样率发射信号输出。 设置加法器以从第二抽取器的输出中减去自适应回波消除器的输出,以产生基本上没有回波的接收信号。

    Residential gateway for voice over internet protocol communications
    3.
    发明授权
    Residential gateway for voice over internet protocol communications 有权
    用于互联网协议通信语音的住宅网关

    公开(公告)号:US08532147B2

    公开(公告)日:2013-09-10

    申请号:US13554861

    申请日:2012-07-20

    IPC分类号: H04J1/02 H04M11/00

    摘要: A method and system are provided for preventing data loss in a VoIP system. In particular, during a VoIP call, it is determined whether incoming ringing on a POTS line causes an unacceptable level of signal loss or errors. If so, for subsequent VoIP calls, the CO handling calls to the POTS line is instructed to either answer each call with a busy signal or automatically forward calls to the POTS line to the VoIP line or other selected telephone. Calling returns to normal upon ending of the VoIP call. In this manner, incoming ringing on the POTS line does not result in call dropping or lengthy retraining processes.

    摘要翻译: 提供了一种防止VoIP系统中的数据丢失的方法和系统。 特别地,在VoIP呼叫期间,确定POTS线上的输入振铃是否导致不可接受的信号丢失或错误的水平。 如果是这样,对于随后的VoIP呼叫,指示对POTS线路的CO处理呼叫以忙信号来应答每个呼叫,或者自动将呼叫转移到VoIP线路或其他所选电话的POTS线路。 呼叫结束时呼叫恢复正常。 以这种方式,POTS线路上的呼入不会导致呼叫丢失或冗长的再训练过程。

    Systems and methods for improved bit loading for discrete multi-tone modulated multiple latency applications
    4.
    发明授权
    Systems and methods for improved bit loading for discrete multi-tone modulated multiple latency applications 有权
    用于离散多色调多个延迟应用的改进位加载的系统和方法

    公开(公告)号:US07813434B2

    公开(公告)日:2010-10-12

    申请号:US11559772

    申请日:2006-11-14

    IPC分类号: H04K1/10 H04L27/28

    摘要: Systems and methods for performing bit loading in a dual latency data transmission system. In a computer network, such as an XDSL-based network, carrier channels are allocated between two latency paths. Error sensitive information is transmitted over a latency path employing one or more forward error correction techniques. Latency sensitive information that is relatively more tolerant of errors is transmitted over the other latency path. Rather than employing the lowest coding gain for carrier channels having the two different latency paths, the highest coding gain for each path is used by applying different target S-N-R margins for carrier channels having different latency paths.

    摘要翻译: 用于在双延迟数据传输系统中执行比特加载的系统和方法。 在诸如基于XDSL的网络的计算机网络中,在两个等待时间路径之间分配载波信道。 误差敏感信息通过采用一个或多个前向纠错技术的等待时间路径传输。 通过另一个等待时间路径发送相对更容忍错误的延迟敏感信息。 不是对具有两个不同等待时间路径的载波信道采用最低的编码增益,而是通过对具有不同等待时间路径的载波信道应用不同的目标S-N-R边缘来使用每个路径的最高编码增益。

    Systems and methods for adaptive VDSL with variable sampling frequency and time-domain equalizer
    5.
    发明授权
    Systems and methods for adaptive VDSL with variable sampling frequency and time-domain equalizer 有权
    具有可变采样频率和时域均衡器的自适应VDSL的系统和方法

    公开(公告)号:US07352805B2

    公开(公告)日:2008-04-01

    申请号:US11282109

    申请日:2005-11-18

    IPC分类号: H03H7/30

    摘要: A method and system for enhancing reach-performance of a multi-carrier VDSL System estimates loop length, estimates maximum available bandwidth that can be utilized at that particular loop length, optimally selects an FFT size and sampling rate, and decides whether to apply a time domain equalization to its receiver and if so, selects a cyclic extension size. To minimize the implementation complexity, the sampling frequencies at receiver and transmitter are lowered to match the actual usable bandwidth. The FFT/IFFT sizes in the implementation are also required to set appropriately accordingly.

    摘要翻译: 一种用于增强多载波VDSL系统的达到性能的方法和系统估计环路长度,估计可以在该特定环路长度下使用的最大可用带宽,最佳地选择FFT大小和采样率,并且决定是否应用时间 域均衡到其接收器,如果是,则选择循环扩展大小。 为了最小化实现复杂度,降低接收机和发射机的采样频率以匹配实际可用带宽。 执行中的FFT / IFFT大小也需要适当地进行设置。

    Multilevel channel coding in ADSL
    6.
    发明申请
    Multilevel channel coding in ADSL 有权
    ADSL中的多级信道编码

    公开(公告)号:US20050010853A1

    公开(公告)日:2005-01-13

    申请号:US10860286

    申请日:2004-06-04

    摘要: Disclosed herein are various techniques for multilevel channel coding. For a given binary word comprising a plurality of bits, the least-significant bit may be encoded by a boosted coding technique, such as turbo channel coding or low density parity check (LDPC) channel coding. A subset of the remaining bits of the binary word may be encoded using trellis coded modulation (TCM) coding. The results of the boosted channel coding and the TCM coding may be mapped to one or more symbols. The one or more symbols then may be transmitted to a receiver using transmission techniques well known to those skilled in the art. The present invention finds particular benefit in digital subscriber line (DSL)-based systems in accord with the ITU G.992-1 Recommendation and similar standards.

    摘要翻译: 这里公开了用于多电平信道编码的各种技术。 对于包括多个位的给定二进制字,最低有效位可以通过诸如turbo信道编码或低密度奇偶校验(LDPC)信道编码的增强编码技术来编码。 可以使用网格编码调制(TCM)编码对二进制字的剩余位的子集进行编码。 增强的信道编码和TCM编码的结果可以映射到一个或多个符号。 然后可以使用本领域技术人员公知的传输技术将一个或多个符号发送到接收机。 本发明在符合ITU G.992-1建议书和类似标准的基于数字用户线路(DSL)的系统中特别有益。

    RESIDENTIAL GATEWAY FOR VOICE OVER INTERNET PROTOCOL COMMUNICATIONS
    8.
    发明申请
    RESIDENTIAL GATEWAY FOR VOICE OVER INTERNET PROTOCOL COMMUNICATIONS 有权
    通过互联网协议通信的语音网关

    公开(公告)号:US20120287923A1

    公开(公告)日:2012-11-15

    申请号:US13554861

    申请日:2012-07-20

    IPC分类号: H04L12/66

    摘要: A method and system are provided for preventing data loss in a VoIP system. In particular, during a VoIP call, it is determined whether incoming ringing on a POTS line causes an unacceptable level of signal loss or errors. If so, for subsequent VoIP calls, the CO handling calls to the POTS line is instructed to either answer each call with a busy signal or automatically forward calls to the POTS line to the VoIP line or other selected telephone. Calling returns to normal upon ending of the VoIP call. In this manner, incoming ringing on the POTS line does not result in call dropping or lengthy retraining processes.

    摘要翻译: 提供了一种防止VoIP系统中的数据丢失的方法和系统。 特别地,在VoIP呼叫期间,确定POTS线上的输入振铃是否导致不可接受的信号丢失或错误的水平。 如果是这样,对于随后的VoIP呼叫,指示对POTS线的CO处理呼叫以忙信号来应答每个呼叫,或者自动将呼叫转移到VoIP线路或其他所选电话的POTS线路。 呼叫结束时呼叫恢复正常。 以这种方式,POTS线路上的呼入不会导致呼叫丢失或冗长的再训练过程。

    System and method for selectable mask for LDSL
    9.
    发明授权
    System and method for selectable mask for LDSL 失效
    LDSL可选掩码的系统和方法

    公开(公告)号:US08126038B2

    公开(公告)日:2012-02-28

    申请号:US12392039

    申请日:2009-02-24

    IPC分类号: H04B1/38

    摘要: The present invention overcomes various problems by defining two upstream masks (U1, U2) and two downstream masks (D1, D2) and using a mask selectable system for the long reach digital subscriber line (LDSL), in which a unique modem feature is activated during handshake to automatically check for physical layer status in terms of spectral compatibility and, thus, automatically optimize the boosted mode with the use of the mask selectable system choose the best combination of upstream/downstream masks in any physical layer noise scenario.

    摘要翻译: 本发明通过定义两个上游掩码(U1,U2)和两个下行掩码(D1,D2)并使用用于长距离数字用户线(LDSL)的掩码可选择系统来克服各种问题,其中唯一的调制解调器特征被激活 在握手期间,根据频谱兼容性自动检查物理层状态,因此,使用掩码可选择系统自动优化升压模式,在任何物理层噪声场景中选择上游/下游掩码的最佳组合。

    Systems and Methods for MIMO Precoding in an xDSL System
    10.
    发明申请
    Systems and Methods for MIMO Precoding in an xDSL System 有权
    xDSL系统中MIMO预编码的系统和方法

    公开(公告)号:US20110200140A1

    公开(公告)日:2011-08-18

    申请号:US13091651

    申请日:2011-04-21

    IPC分类号: H04L25/49

    CPC分类号: H04B3/32 H04L1/0042

    摘要: One embodiment is a method for precoding data for transmission in a discrete multi-tone (DMT) system to cancel self-induced far end crosstalk (self-FEXT). The method comprises learning, by the system, characteristics associated with a plurality of N users within a digital subscriber line (xDSL) system to determine an initial off-diagonal multiple input multiple output (MIMO) precoder (ODMP) for a given tone frequency and converging towards an ODMP from the initial ODMP to cancel self-FEXT for the plurality of N users, wherein the ODMP is represented as a zero diagonal matrix containing only off-diagonal terms.

    摘要翻译: 一个实施例是用于在离散多音(DMT)系统中预编码用于传输的数据以消除自感应远端串扰(self-FEXT)的方法。 该方法包括通过系统学习与数字用户线(xDSL)系统内的多个N个用户相关联的特征,以确定给定音频的初始非对角多输入多输出(MIMO)预编码器(ODMP),以及 从初始ODMP收敛到ODMP以取消多个N个用户的自身FEXT,其中ODMP被表示为仅包含非对角项的零对角矩阵。