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    MPEG on screen display coder for DTV interfaces
    3.
    发明授权
    MPEG on screen display coder for DTV interfaces 有权
    用于DTV接口的MPEG屏幕显示编码器

    公开(公告)号：US07327790B1

    公开(公告)日：2008-02-05

    申请号：US09330769

    申请日：1999-06-11

    申请人： Wayne E. Bretl ,  Mark Fimoff ,  Paul A. Snopko

    发明人： Wayne E. Bretl ,  Mark Fimoff ,  Paul A. Snopko

    IPC分类号： H04N7/18

    CPC分类号： H04N5/44508 ,  H04N21/4316 ,  H04N21/4383 ,  H04N21/4402

    摘要： An MPEG on-screen display coder includes a buffer, an MPEG encoder, and a multiplexer. The buffer receives and buffers an MPEG transport data stream containing frames of a selected program and frames of a non-selected program. The MPEG encoder encodes frames of the selected program with an on-screen display. The multiplexer selectively passes to a digital television receiver the frames of the non-selected program, the encoded frames of the selected program, and original frames of the selected program.

    摘要翻译： MPEG屏幕显示编码器包括缓冲器，MPEG编码器和多路复用器。 缓冲器接收并缓冲包含所选节目的帧和未选择节目的帧的MPEG传输数据流。 MPEG编码器通过屏幕显示对所选程序的帧进行编码。 复用器选择性地向数字电视接收机传递未选择节目的帧，所选节目的编码帧以及所选节目的原始帧。

    Decision feedback equalizers with constrained feedback taps for reduced error propagation
    4.
    发明授权
    Decision feedback equalizers with constrained feedback taps for reduced error propagation 有权
    具有约束反馈抽头的判决反馈均衡器，用于减少误差传播

    公开(公告)号：US07313182B2

    公开(公告)日：2007-12-25

    申请号：US10804706

    申请日：2004-03-19

    申请人： Mark Fimoff ,  William J. Hillery ,  Michael D. Zoltowski

    发明人： Mark Fimoff ,  William J. Hillery ,  Michael D. Zoltowski

    IPC分类号： H03H7/40

    CPC分类号： H04L25/03057 ,  H04L2025/0349 ,  H04L2025/03605 ,  H04L2025/03681

    摘要： Constrained tap weights of a decision feedback equalizer are determined according to the channel impulse response of a channel and a constraint function. The constraint function is differentiable and is an approximation of a non-differentiable tap weight constraint function. The tap weight constraint function may have a constraint value M that is a function of a mean squared error of the estimated mean squared error at the output of the decision feedback equalizer.

    摘要翻译： 根据信道的信道脉冲响应和约束函数确定判决反馈均衡器的约束抽头权重。 约束函数是可微分的，并且是不可微分的抽头权重约束函数的近似。 抽头权重约束函数可以具有作为判决反馈均衡器的输出处的估计均方误差的均方误差的函数的约束值M。

    Channel estimator using one or more correlation reference vectors to eliminate data related noise
    5.
    发明授权
    Channel estimator using one or more correlation reference vectors to eliminate data related noise 有权
    信道估计器使用一个或多个相关参考向量来消除数据相关噪声

    公开(公告)号：US07289580B2

    公开(公告)日：2007-10-30

    申请号：US10267242

    申请日：2002-10-09

    申请人： Christopher J. Pladdy ,  Mark Fimoff ,  Sreenivasa M. Nerayanuru ,  Serdar Ozen ,  Michael D. Zoltowski

    发明人： Christopher J. Pladdy ,  Mark Fimoff ,  Sreenivasa M. Nerayanuru ,  Serdar Ozen ,  Michael D. Zoltowski

    IPC分类号： H04L27/06

    CPC分类号： H04L25/0212 ,  H04L25/0224

    摘要： An impulse response of a channel is estimated by correlating a received signal with a stored vector. The received signal contains a training sequence having a length Ltr, the stored vector has a length Lsv, Ltr/n=Lsv, and n is greater than two. The signal is received by a device. The vector is determined based on the training sequence and an ideal channel. The ideal channel is an idealized form of a channel through which the device receives the signal. A plurality of correlations may be performed where each correlation provides a substantially noise-free estimate of the impulse response of a different portion of the channel. The correlations are combined to provide an estimate of the impulse response of the channel.

    摘要翻译： 通过将接收的信号与存储的矢量相关联来估计信道的脉冲响应。 所接收的信号包含具有长度L 的训练序列，所存储的矢量具有长度L sv，L，tr，/ L，L， SUB> sv ，n大于2。 信号由设备接收。 基于训练序列和理想信道确定向量。 理想的通道是设备接收信号的通道的理想形式。 可以执行多个相关性，其中每个相关性提供对信道的不同部分的脉冲响应的基本上无噪声的估计。 相关性被组合以提供信道的脉冲响应的估计。

    Adaptive thresholding algorithm for the noise due to unknown symbols in correlation based channel impulse response (CIR) estimate
    6.
    发明授权
    Adaptive thresholding algorithm for the noise due to unknown symbols in correlation based channel impulse response (CIR) estimate 有权
    在基于相关的信道脉冲响应（CIR）估计中由于未知符号引起的噪声的自适应阈值算法

    公开(公告)号：US07239679B2

    公开(公告)日：2007-07-03

    申请号：US10227661

    申请日：2002-08-26

    申请人： Mark Fimoff ,  Sreenivasa M. Nerayanuru ,  Christopher J. Pladdy

    发明人： Mark Fimoff ,  Sreenivasa M. Nerayanuru ,  Christopher J. Pladdy

    IPC分类号： H04L1/00 ,  H04L25/08

    CPC分类号： H04L25/0218

    摘要： An impulse response is estimated for a channel by estimating an intermediate impulse response of the channel. The intermediate impulse response comprises at least one multipath spike and one or more non-deterministic noise components at locations throughout the channel. Then, a threshold function is applied to the estimated intermediate impulse response across at least a portion of the channel in order to provide an estimated final impulse response of the channel. The threshold function has the effect of nulling the noise components of the channel having values less than the threshold function at the location within the channel of the respective noise component, and the threshold function is characterized by a level that varies across the portion of the channel from a minimum value to a maximum value in a manner determined by the location of the at least one multipath spike within the channel.

    摘要翻译： 通过估计信道的中间脉冲响应来估计信道的脉冲响应。 中间脉冲响应包括在整个通道的位置处的至少一个多路径尖峰和一个或多个非确定性噪声分量。 然后，阈值函数被应用于跨信道的至少一部分的估计的中间脉冲响应，以便提供信道的估计的最终脉冲响应。 阈值函数具有使在各个噪声分量的信道内的位置处具有小于阈值函数的信道的噪声分量归零的效果，并且阈值函数的特征在于在信道的整个部分上变化的电平 以由通道内的至少一个多径峰值的位置确定的方式从最小值到最大值。

    Ghost eliminating equalizer
    8.
    发明授权
    Ghost eliminating equalizer 有权
    鬼消除均衡器

    公开(公告)号：US06937649B2

    公开(公告)日：2005-08-30

    申请号：US10650179

    申请日：2003-08-28

    申请人： Richard W. Citta ,  Scott M. LoPresto ,  Jingsong Xia

    发明人： Richard W. Citta ,  Scott M. LoPresto ,  Jingsong Xia

    IPC分类号： H04L25/03 ,  H04L5/21

    CPC分类号： H04L25/03159 ,  H04L25/03038 ,  H04L2025/03528

    摘要： An equalizer substantially eliminates a ghost of a received main signal by (i) applying coefficients b (where b may be equal to one) to the received main signal and the ghost in order to modulate the received main signal and the ghost so that the received main signal and the ghost are unequal, (ii) applying coefficients a to the modulated received main signal and ghost in order to substantially eliminate the ghost, and (iii) applying coefficients c as a window function to the substantially ghost-free received main signal in order to remove the modulation imposed on the received main signal by the coefficients b.

    摘要翻译： 均衡器通过（i）将系数b（其中b可以等于1）施加到所接收的主信号和重影，基本上消除了接收到的主信号的重影，以便调制接收到的主信号和重影，使得接收到的主信号 主信号和重影不相等，（ii）将系数a应用于调制接收的主信号和重影，以便基本上消除重影，以及（iii）将系数c作为窗口函数应用于基本上无重影的接收主信号 以便通过系数b去除对接收的主信号施加的调制。

    Coding and decoding a signal modified in accordance with the feedback states of an encoder
    9.
    发明授权
    Coding and decoding a signal modified in accordance with the feedback states of an encoder 有权
    编码和解码根据编码器的反馈状态修改的信号

    公开(公告)号：US06917655B2

    公开(公告)日：2005-07-12

    申请号：US10215081

    申请日：2002-08-08

    申请人： Mark Fimoff ,  Wayne E. Bretl

    发明人： Mark Fimoff ,  Wayne E. Bretl

    IPC分类号： H04L1/00 ,  H04L27/34 ,  H04N5/44 ,  H04N7/66 ,  H04N21/2383 ,  H04N21/438 ,  H04N1/64

    CPC分类号： H04L1/0054 ,  H04L27/3416 ,  H04N5/4401

    摘要： A data encoding system includes a modifier, an encoder, and a feedback. The modifier receives a first data stream and modifies the first data stream so as to provide a second data stream. The encoder encodes the second data stream in order to provide an output. At least a portion of the output has predetermined symbol values. A feedback from the encoder to the modifier provides encoder states to the modifier. The modifier modifies the first data stream based on the encoder states so as to facilitate the encoder in providing the portion of the output having the predetermined symbol values. A receiver receives a signal based on the output and decodes the signal.

    摘要翻译： 数据编码系统包括修改器，编码器和反馈。 修改器接收第一数据流并修改第一数据流以便提供第二数据流。 编码器对第二数据流进行编码，以提供输出。 输出的至少一部分具有预定的符号值。 从编码器到修改器的反馈为编辑器提供编码器状态。 修改器基于编码器状态修改第一数据流，以便于编码器提供具有预定符号值的输出部分。 接收机基于输出接收信号并对信号进行解码。