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17 条记录 (耗时 0.026 秒)

    Method and system for identifying a corrupted speech message signal
    1.
    发明授权
    Method and system for identifying a corrupted speech message signal 失效
    用于识别损坏的语音消息信号的方法和系统

    公开(公告)号：US5684921A

    公开(公告)日：1997-11-04

    申请号：US501852

    申请日：1995-07-13

    申请人： Aruna Bayya ,  Louis A. Cox, Jr. ,  Marvin L. Vis

    发明人： Aruna Bayya ,  Louis A. Cox, Jr. ,  Marvin L. Vis

    IPC分类号： G10L21/02 ,  G10L9/18

    CPC分类号： G10L21/0208

    摘要： A method is disclosed for identifying corrupted speech signals in a call receiving mode of a voice messaging system. The method includes the step of receiving a message signal. The message signal represents an audio message. The method next includes the step of determining a signal quality. The signal quality is then compared to a threshold. If the signal quality is at least as great as the threshold, the audio data representing the message signal is stored in a memory. If the signal quality is not as great as the threshold, an indication signal is transmitted indicating that the signal quality is poor. A system is also disclosed for implementing the steps of the method.

    摘要翻译： 公开了一种用于识别语音消息系统的呼叫接收模式中的损坏的语音信号的方法。 该方法包括接收消息信号的步骤。 消息信号表示音频消息。 该方法接下来包括确定信号质量的步骤。 然后将信号质量与阈值进行比较。 如果信号质量至少与阈值一样大，表示消息信号的音频数据被存储在存储器中。 如果信号质量不如阈值那么大，则发送指示信号质量差的指示信号。 还公开了一种用于实现该方法的步骤的系统。

    Method and system for region based filtering of speech
    2.
    发明授权
    Method and system for region based filtering of speech 失效
    用于基于区域的语音过滤的方法和系统

    公开(公告)号：US5963899A

    公开(公告)日：1999-10-05

    申请号：US694654

    申请日：1996-08-07

    申请人： Aruna Bayya ,  Marvin L. Vis

    发明人： Aruna Bayya ,  Marvin L. Vis

    IPC分类号： G10L21/02 ,  G10L3/02

    CPC分类号： G10L21/0208 ,  G10L25/18

    摘要： A speech signal divided into frames, each frame having a sound type, and a class is determined for each frame depending on the sound type of the frame. One of multiple filters is selected for each frame depending on the class of the frame. Each frame is filtered according to the filter selected, and the filtered frames combined to provide a filtered speech signal. The system includes filters and software.

    摘要翻译： 根据帧的声音类型，分成帧的语音信号，每帧具有声音类型，并且针对每个帧确定类别。 根据帧的类别为每个帧选择多个滤波器之一。 每个帧根据所选择的滤波器进行滤波，滤波后的帧被组合以提供滤波后的语音信号。 该系统包括过滤器和软件。

    Method and system for adaptive filtering of speech signals using signal-to-noise ratio to choose subband filter bank
    3.
    发明授权
    Method and system for adaptive filtering of speech signals using signal-to-noise ratio to choose subband filter bank 失效
    使用信噪比对语音信号进行自适应滤波的方法和系统，以选择子带滤波器组

    公开(公告)号：US5806025A

    公开(公告)日：1998-09-08

    申请号：US695097

    申请日：1996-08-07

    申请人： Marvin L. Vis ,  Aruna Bayya

    发明人： Marvin L. Vis ,  Aruna Bayya

    IPC分类号： G10L21/02 ,  G10L3/02

    CPC分类号： G10L21/0208 ,  G10L25/18

    摘要： A method and system for adaptively filtering a speech signal. The method includes decomposing the signal into subbands, which may include performing a discrete Fourier transform on the signal to provide approximately orthogonal components. The method also includes determining a speech quality indicator for each subband, which may include estimating a signal-to-noise ratio for each subband. The method also includes selecting a filter for filtering each subband depending on the speech quality indicator, which may include estimating parameters for the filter based on a clean speech signal. The method further includes determining an overall average error for the filtered subbands, which may include calculating a mean-squared error. The method still further includes identifying at least one filtered subband which, if excluded from the filtered speech signal, would reduce the overall average error determined, and combining, with exception of the filtered subbands identified, the filtered subbands to provide an estimated filtered speech signal. The system includes filters and software for performing the method.

    摘要翻译： 一种用于自适应地过滤语音信号的方法和系统。 该方法包括将信号分解成子带，其可以包括对该信号执行离散付里叶变换以提供近似正交的分量。 该方法还包括确定每个子带的语音质量指示符，其可以包括估计每个子带的信噪比。 该方法还包括选择用于根据语音质量指示符对每个子带进行滤波的滤波器，其可以包括基于干净的语音信号估计滤波器的参数。 该方法还包括确定经滤波的子带的总体平均误差，其可以包括计算均方误差。 该方法还包括识别至少一个滤波后的子带，如果从经滤波的语音信号中排除该子带将减少所确定的总体平均误差，并且除了所识别的滤波后的子带之外，组合经滤波的子带以提供估计的滤波后的语音信号 。 该系统包括用于执行该方法的过滤器和软件。

    Sampled amplitude read channel employing a post processor with a boundary error compensator which compensates for boundary error events in a split-field data sector
    5.
    发明授权
    Sampled amplitude read channel employing a post processor with a boundary error compensator which compensates for boundary error events in a split-field data sector 有权
    采用具有边界误差补偿器的后处理器的采样振幅读通道，其补偿分割场数据扇区中的边界误差事件

    公开(公告)号：US06530060B1

    公开(公告)日：2003-03-04

    申请号：US09499888

    申请日：2000-02-08

    申请人： Marvin L. Vis ,  Christopher P. Zook

    发明人： Marvin L. Vis ,  Christopher P. Zook

    IPC分类号： H03M1300

    CPC分类号： G11B20/10055 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/18

    摘要： A sampled amplitude read channel is disclosed for reading a data sector recorded on a disk storage medium by detecting an estimated data sequence from a sequence of read signal sample values generated by sampling an analog read signal emanating from a read head positioned over the disk storage medium, the data sector comprising a user data segment and an embedded field comprising a known data segment. A sampling device samples the analog read signal to generate the read signal sample values and a trellis sequence detector detects a preliminary sequence from the read signal sample values. A post processor detects and corrects errors in the preliminary sequence using a syndrome generator responsive to the preliminary sequence representing the user data segment. The syndrome generator generates an error syndrome according to a predetermined error detection code. A boundary error compensator compensates for a boundary error event spanning the user data segment and the known data segment. A guided error corrector, responsive to the error syndrome, corrects errors detected in the preliminary sequence.

    摘要翻译： 公开了采样幅度读取通道，用于通过从通过对位于盘存储介质上的读取头发出的模拟读取信号进行采样产生的读取信号采样值的序列中检测估计的数据序列来读取记录在盘存储介质上的数据扇区 ，所述数据扇区包括用户数据段和包括已知数据段的嵌入字段。 采样设备对模拟读取信号进行采样以产生读取信号采样值，并且网格序列检测器根据读取信号采样值检测初步序列。 后处理器使用响应于表示用户数据段的初步序列的校正子发生器来检测和校正初步序列中的错误。 校正子发生器根据预定的错误检测码产生错误综合征。 边界误差补偿器补偿跨越用户数据段和已知数据段的边界错误事件。 响应于错误综合征的引导误差校正器校正在初步序列中检测到的错误。

    Data randomization in a data storage system
    8.
    发明授权
    Data randomization in a data storage system 有权
    数据存储系统中的数据随机化

    公开(公告)号：US06714144B1

    公开(公告)日：2004-03-30

    申请号：US09694583

    申请日：2000-10-23

    申请人： David E. Reed ,  Jay N. Livingston ,  Marvin L. Vis

    发明人： David E. Reed ,  Jay N. Livingston ,  Marvin L. Vis

    IPC分类号： H03M700

    CPC分类号： G11B20/10009 ,  G11B20/1426

    摘要： Data storage system circuitry comprises randomizer circuitry and grading circuitry. The randomizer circuitry concurrently generates multiple randomized versions of user data. The grading circuitry selects one of the multiple randomized versions of the user data for data storage. Decoding circuitry decodes the selected one of the multiple randomized versions of the user data. In some examples of the invention, the grading circuitry selects the one of the multiple randomized versions of the user data based on zero run characteristics of the multiple randomized versions of the user data. In some examples of the invention, the user data is not encoded with a run length limit algorithm.

    摘要翻译： 数据存储系统电路包括随机化电路和分级电路。 随机化器电路同时生成用户数据的多个随机化版本。 分级电路选择用户数据的多个随机化版本之一用于数据存储。 解码电路解码用户数据的多个随机化版本中所选择的一个。 在本发明的一些示例中，分级电路基于用户数据的多个随机化版本的零运行特性来选择用户数据的多个随机化版本中的一个。 在本发明的一些示例中，用户数据不用游程长度限制算法进行编码。

    Wireless communication system and method with frequency burst acquisition feature using autocorrelation
    9.
    发明授权
    Wireless communication system and method with frequency burst acquisition feature using autocorrelation 有权
    采用自相关的无线通信系统和频率突发采集特征的方法

    公开(公告)号：US08054918B2

    公开(公告)日：2011-11-08

    申请号：US10955584

    申请日：2004-09-30

    申请人： Marvin L. Vis ,  Jing Liang ,  Richard T. Behrens ,  Samuel Rousselin

    发明人： Marvin L. Vis ,  Jing Liang ,  Richard T. Behrens ,  Samuel Rousselin

    IPC分类号： H03D1/00 ,  H04L27/06

    CPC分类号： H04L27/22 ,  H04L2027/0028 ,  H04L2027/0057 ,  H04L2027/0095

    摘要： A wireless communication system is provided that detects a frequency burst (FB) through analysis of the autocorrelation function of received signals. The system can accommodate the relatively large frequency offsets that are associated with less expensive reference frequency crystals. The system employs a multi-mode filter including an FB filter and a channelization filter. In one embodiment, the FB filter is employed until an FB is located and then, once the FB is located, the channelization filter is employed to receive signals.

    摘要翻译： 提供了一种通过分析接收信号的自相关函数来检测频率突发（FB）的无线通信系统。 该系统可以适应与较便宜的参考频率晶体相关联的相对较大的频率偏移。 该系统采用包括FB滤波器和信道化滤波器的多模式滤波器。 在一个实施例中，使用FB滤波器直到FB被定位，然后一旦FB被定位，则使用信道化滤波器来接收信号。

    Wireless communication system and method with frequency burst acquisition feature using autocorrelation and narrowband interference detection
    10.
    发明授权
    Wireless communication system and method with frequency burst acquisition feature using autocorrelation and narrowband interference detection 有权
    采用自相关和窄带干扰检测的无线通信系统和频率突发采集特征的方法

    公开(公告)号：US07567637B2

    公开(公告)日：2009-07-28

    申请号：US10954791

    申请日：2004-09-30

    申请人： Jing Liang ,  Marvin L. Vis ,  Richard T. Behrens

    发明人： Jing Liang ,  Marvin L. Vis ,  Richard T. Behrens

    IPC分类号： H03D1/00

    CPC分类号： H04L27/22 ,  H04L2027/0028 ,  H04L2027/0057 ,  H04L2027/0095

    摘要： A wireless communication system is provided that detects a frequency burst (FB) through analysis of the autocorrelation function of received signals. The system can accommodate the relatively large frequency offsets that are associated with less expensive reference frequency crystals. In one embodiment, the system includes FB search hardware that operates in two modes, namely an FB location mode with narrowband interference (e.g. CW or continuous wave) detection and an FB location mode without such narrowband interference detection, depending on whether a CW signal (carrier or other narrowband interferer) is present or not.

    摘要翻译： 提供了一种通过分析接收信号的自相关函数来检测频率突发（FB）的无线通信系统。 该系统可以适应与较便宜的参考频率晶体相关联的相对较大的频率偏移。 在一个实施例中，系统包括以两种模式操作的FB搜索硬件，即具有窄带干扰（例如CW或连续波）检测的FB位置模式和没有这种窄带干扰检测的FB位置模式，这取决于CW信号 载波或其他窄带干扰源）存在或不存在。