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    Method and apparatus for improving threshold detection of servo data in the presence of signal asymmetry
    2.
    发明授权
    Method and apparatus for improving threshold detection of servo data in the presence of signal asymmetry 有权
    在存在信号不对称的情况下改善伺服数据的阈值检测的方法和装置

    公开(公告)号：US07586704B2

    公开(公告)日：2009-09-08

    申请号：US11359656

    申请日：2006-02-22

    申请人： Viswanath Annampedu

    发明人： Viswanath Annampedu

    IPC分类号： G11B5/09

    CPC分类号： G11B20/10481 ,  G11B20/10046 ,  G11B20/10203

    摘要： An adaptive asymmetry control circuit is described. Such a circuit may be used in magnetic recording applications, for example. The adaptive asymmetry control circuit uses a peak detector which supplies at regular intervals positive or negative signal peak values of an equalized sampled data stream. An asymmetry learning function generates a summation of N pairs of positive and negative signal peak values divided by N as an average signal asymmetry value. The average signal asymmetry value is divided by 2 in an optimal threshold function producing an optimal threshold value. Then a threshold detector, that uses the optimal threshold value as a threshold, slices the sampled data stream at regular intervals.

    摘要翻译： 描述了一种自适应不对称控制电路。 例如，这种电路可以用在磁记录应用中。 自适应不对称控制电路使用峰值检测器，其以规则的间隔提供均衡的采样数据流的正或负信号峰值。 不对称学习功能产生N个正，负信号峰值N除以平均信号不对称值的总和。 平均信号不对称值在产生最佳阈值的最优阈值函数中除以2。 然后，使用最佳阈值作为阈值的阈值检测器以规则的间隔切片采样数据流。

    Late reverberation-based synthesis of auditory scenes
    3.
    发明授权
    Late reverberation-based synthesis of auditory scenes 有权
    晚期基于混响的合成听觉场景

    公开(公告)号：US07583805B2

    公开(公告)日：2009-09-01

    申请号：US10815591

    申请日：2004-04-01

    申请人： Frank Baumgarte ,  Christof Faller

    发明人： Frank Baumgarte ,  Christof Faller

    IPC分类号： H03G3/00 ,  H04R5/00 ,  G10L19/00

    CPC分类号： H04S3/002 ,  G10L19/008 ,  H04S3/004 ,  H04S7/305 ,  H04S2420/03

    摘要： A scheme for stereo and multi-channel synthesis of inter-channel correlation (ICC) (normalized cross-correlation) cues for parametric stereo and multi-channel coding. The scheme synthesizes ICC cues such that they approximate those of the original. For that purpose, diffuse audio channels are generated and mixed with the transmitted combined (e.g., sum) signal(s). The diffuse audio channels are preferably generated using relatively long filters with exponentially decaying Gaussian impulse responses. Such impulse responses generate diffuse sound similar to late reverberation. An alternative implementation for reduced computational complexity is proposed, where inter-channel level difference (ICLD), inter-channel time difference (ICTD), and ICC synthesis are all carried out in the domain of a single short-time Fourier transform (STFT), including the filtering for diffuse sound generation.

    摘要翻译： 用于参数立体声和多声道编码的信道间相关（ICC）（归一化互相关）提示的立体声和多声道合成的方案。 该方案合成了ICC提示，使它们与原始图像近似。 为此，生成扩散音频通道并与发送的组合（例如，和）信号混合。 优选地，使用具有指数衰减高斯脉冲响应的相对长的滤波器生成扩散音频信道。 这种脉冲响应产生类似于后期混响的漫射声。 提出了一种用于降低计算复杂度的替代实现方式，其中，在单个短时傅立叶变换（STFT）的领域中，都进行信道间电平差（ICLD），信道间时差（ICTD）和ICC合成， ，包括扩散声产生的滤波。

    Set-associative memory architecture for routing tables
    4.
    发明授权
    Set-associative memory architecture for routing tables 有权
    用于路由表的集合关联存储器架构

    公开(公告)号：US07573880B2

    公开(公告)日：2009-08-11

    申请号：US10983485

    申请日：2004-11-08

    申请人： Stefanos Kaxiras ,  Georgios Keramidas

    发明人： Stefanos Kaxiras ,  Georgios Keramidas

    IPC分类号： H04L12/56 ,  G06F13/00

    CPC分类号： H04L45/00 ,  H04L45/742

    摘要： A set-associative architecture (IPStash) restricts routing table prefixes to a limited number of lengths using a controlled, prefix-expansion technique. Since this inflates the routing tables, skewed associativity can be used to increase the effective capacity of IPStash. In addition, pruning of redundant entries can be applied to decrease the size of the expanded tables. Compared to previous proposals, IPStash does not require any complicated routing table transformations but, more importantly, it makes incremental updates to the routing tables effortless. IPStash is also easily expandable. IPStash is both fast and power-efficient compared to TCAMs. Specifically, IPStash devices built in the same technology as TCAMs can run at speeds in excess of 600 MHz, offer more than twice the search throughput (>200 Msps), and consume up to 35 % less power (for the same throughput) than the best commercially available TCAMs when tested with real routing tables and IP traffic.

    摘要翻译： 集合关联架构（IPStash）使用受控的前缀扩展技术将路由表前缀限制到有限数量的长度。 由于这样会使路由表发生膨胀，所以可以使用偏移关联来增加IPStash的有效容量。 此外，可以应用修剪冗余条目以减小扩展表的大小。 与以前的提案相比，IPStash不需要任何复杂的路由表转换，但更重要的是，它可以轻松地对路由表进行增量更新。 IPStash也很容易扩展。 与TCAM相比，IPStash既快速又省电。 具体来说，与TCAM相同的技术构建的IPStash设备可以以超过600 MHz的速度运行，提供超过两倍的搜索吞吐量（> 200 Msps），并且消耗的功耗（相同吞吐量）高达35％ 在实际路由表和IP流量测试时，商业上最佳的TCAMs。

    Retrieval of deleted voice messages in voice messaging system
    5.
    发明授权
    Retrieval of deleted voice messages in voice messaging system 失效
    在语音留言系统中检索已删除的语音留言

    公开(公告)号：US07558381B1

    公开(公告)日：2009-07-07

    申请号：US09296538

    申请日：1999-04-22

    申请人： Syed S. Ali ,  Lakshmi Narayana Jampanaboyana ,  James J. Greybush

    发明人： Syed S. Ali ,  Lakshmi Narayana Jampanaboyana ,  James J. Greybush

    IPC分类号： H04M1/64

    CPC分类号： H04M1/6505 ,  H04M3/5335 ,  H04M3/53366

    摘要： Apparatus and method to allow retrieval of voice messages deleted from the voice message memory of a voice messaging system. A voice messaging system such as a telephone answering device includes a deleted voice message memory for storing voice messages deleted from the voice message memory. The deleted voice messages stored in the deleted voice message memory are retrievable by the user for review subject to rules for permanent deletion of the deleted voice messages (e.g., after a period of time, when the deleted voice message memory approaches capacity, periodically, etc.).

    摘要翻译： 用于允许检索从语音消息系统的语音消息存储器中删除的语音消息的装置和方法。 诸如电话应答设备的语音消息系统包括用于存储从语音消息存储器中删除的语音消息的已删除语音消息存储器。 存储在删除的语音消息存储器中的删除的语音消息可以由用户检索，以便根据删除的语音消息的永久删除的规则（例如，在一段时间之后，当被删除的语音消息存储器接近容量，周期性等） 。）。

    Head-specific standby modes for disk drive preamplifiers and the like
    6.
    发明授权
    Head-specific standby modes for disk drive preamplifiers and the like 有权
    用于磁盘驱动器前置放大器的头专用待机模式等

    公开(公告)号：US07595951B2

    公开(公告)日：2009-09-29

    申请号：US11445535

    申请日：2006-06-02

    申请人： Daniel J. Dolan ,  David W. Kelly ,  Stephen C. Kuehne ,  Nathan M. Rudd ,  Ross S. Wilson

    发明人： Daniel J. Dolan ,  David W. Kelly ,  Stephen C. Kuehne ,  Nathan M. Rudd ,  Ross S. Wilson

    IPC分类号： G11B15/12

    CPC分类号： G11B5/09 ,  G11B5/012

    摘要： A (e.g., hard-disk drive (HD)) system supports reader standby mode and/or writer standby mode. For reader standby mode, reader circuitry in the system's preamplifier is transitioned to a low-power mode during write operations. To provide quick transition from write mode to read mode, the reader circuitry is transitioned to pre-read mode before the end of the write operation. For writer standby mode, the preamplifier's writer circuitry is transitioned to a low-power mode during read operations. To provide quick transition from read mode to write mode, the writer circuitry is transitioned to a pre-write mode before the end of the read operation. The availability of a reader standby mode during write operations and a writer standby mode during read operations reduces power consumption as compared to HD systems that leave the reader circuitry in pre-read mode throughout each write operation and the writer circuitry in pre-write mode throughout each read operation.

    摘要翻译： A（例如，硬盘驱动器（HD））系统支持读取器待机模式和/或写入器待机模式。 对于读取器待机模式，系统前置放大器中的读取器电路在写入操作期间转换为低功耗模式。 为了提供从写入模式到读取模式的快速转换，读写器电路在写操作结束之前转换到预读模式。 对于写入器待机模式，在读取操作期间，前置放​​大器的写入器电路转换为低功耗模式。 为了提供从读取模式到写入模式的快速转换，写操作器电路在读取操作结束之前转换到预写模式。 在写入操作期间读写器待机模式和读取操作期间写入器待机模式的可用性与在整个写入操作期间使读取器电路处于预读取模式并且以写入前模式的写入器电路全部停止的HD系统相比，降低功耗 每次读操作。

    Choke coil
    7.
    发明授权
    Choke coil 有权
    扼流线圈

    公开(公告)号：US07623014B2

    公开(公告)日：2009-11-24

    申请号：US12127223

    申请日：2008-05-27

    申请人： Roger Hsieh ,  Yi-Min Huang ,  Lan-Chin Hsieh ,  Yung-Chien Wang

    发明人： Roger Hsieh ,  Yi-Min Huang ,  Lan-Chin Hsieh ,  Yung-Chien Wang

    IPC分类号： H01F27/30 ,  H01F27/02 ,  H01F38/30 ,  H01F27/29

    CPC分类号： H01F17/045 ,  H01F3/10 ,  H01F2017/048

    摘要： In one embodiment, a choke coil has a magnetic core, a coil, and magnetic material. The core has a first permeability which is from about 350 to 1200. The coil is wrapped around the core. The magnetic material surrounds the coil and has a second permeability. The first permeability is higher than the second permeability. The second permeability is from about 5 to 30.

    摘要翻译： 在一个实施例中，扼流线圈具有磁芯，线圈和磁性材料。 芯具有约350至1200的第一磁导率。线圈缠绕在磁芯上。 磁性材料围绕线圈并具有第二磁导率。 第一渗透率高于第二渗透率。 第二渗透率为约5至30。

    Predistorter
    8.
    发明授权
    Predistorter 失效
    预失真器

    公开(公告)号：US07595689B1

    公开(公告)日：2009-09-29

    申请号：US09743003

    申请日：1999-07-02

    申请人： Peter B. Kenington

    发明人： Peter B. Kenington

    IPC分类号： H03F1/26

    CPC分类号： H04B1/62 ,  H03F1/3258

    摘要： A predistorter arrangement for linearizing an amplifier. The predistorter arrangement is designed to compensate for IMD distortion in an amplifier using polynomial approximation techniques. The predistorter arrangement also includes pilot based feedback circuitry for controlling the operation of the predistorter.

    摘要翻译： 一种用于线性化放大器的预失真器装置。 预失真器装置被设计为使用多项式近似技术来补偿放大器中的IMD失真。 预失真器装置还包括用于控制预失真器的操作的基于导频的反馈电路。

    Audio system based on at least second-order eigenbeams
    9.
    发明授权
    Audio system based on at least second-order eigenbeams 有权
    基于至少二阶本征束的音响系统

    公开(公告)号：US07587054B2

    公开(公告)日：2009-09-08

    申请号：US10500938

    申请日：2003-01-10

    申请人： Gary W. Elko ,  Robert A. Kubli ,  Jens M. Meyer

    发明人： Gary W. Elko ,  Robert A. Kubli ,  Jens M. Meyer

    IPC分类号： H04R3/00 ,  G06F17/00

    CPC分类号： H04R5/027 ,  H04R3/005 ,  H04R2201/401 ,  H04S3/00 ,  H04S2400/15

    摘要： A microphone array-based audio system that supports representations of auditory scenes using second-order (or higher) harmonic expansions based on the audio signals generated by the microphone array. In one embodiment, a plurality of audio sensors are mounted on the surface of an acoustically rigid sphere. The number and location of the audio sensors on the sphere are designed to enable the audio signals generated by those sensors to be decomposed into a set of eigenbeams having at least one eigenbeam of order two (or higher). Beamforming (e.g., steering, weighting, and summing) can then be applied to the resulting eigenbeam outputs to generate one or more channels of audio signals that can be utilized to accurately render an auditory scene. Alternative embodiments include using shapes other than spheres, using acoustically soft spheres and/or positioning audio sensors in two or more concentric patterns.

    摘要翻译： 基于麦克风阵列的音频系统，其基于由麦克风阵列产生的音频信号，支持使用二阶（或更高）谐波扩展的听觉场景的表示。 在一个实施例中，多个音频传感器安装在声学刚性球体的表面上。 球体上的音频传感器的数量和位置被设计成使得由这些传感器产生的音频信号能够分解成具有至少一个二阶（或更高）的本征光束的一组本征束。 然后可以将波束形成（例如，导向，加权和求和）应用于所产生的本征波束输出以产生可用于准确地渲染听觉场景的一个或多个音频信号通道。 替代实施例包括使用球形以外的形状，使用声软球和/或以两个或多个同心图案定位音频传感器。