Digital rate converter
    1.
    发明申请
    Digital rate converter 有权
    数字速率转换器

    公开(公告)号:US20050157828A1

    公开(公告)日:2005-07-21

    申请号:US10761158

    申请日:2004-01-20

    IPC分类号: H03H17/06 H04L7/00 H04L7/02

    摘要: A method and apparatus of converting a data signal in a digital rate converter including upsampling the input data signal at an input sampling rate to an intermediate data signal at an intermediate sampling rate, where the intermediate data signal sample values are stored in a buffer. A plurality of buffer position values are provided from a subset of buffer positions of the buffer to an interpolator, the subset of buffer positions being dependent upon a position indicator. An output data signal is provided by the interpolator at an output sampling rate, where the value of the output data signal is dependent upon a fractional indicator provided to the interpolator. The input sampling rate is based on a first clock signal and the output sampling rate is based on a second clock signal, wherein the first and second clock signal are independent of each other.

    摘要翻译: 一种在数字速率转换器中转换数据信号的方法和装置,包括以输入采样率将输入数据信号上采样到中间数据信号,其中中间数据信号采样值存储在缓冲器中。 从缓冲器的缓冲器位置的子集到内插器提供多个缓冲器位置值,缓冲器位置的子集取决于位置指示器。 输出数据信号由插值器以输出采样率提供,其中输出数据信号的值取决于提供给内插器的分数指示符。 输入采样率基于第一时钟信号,并且输出采样率基于第二时钟信号,其中第一和第二时钟信号彼此独立。

    DIGITAL SATURATION HANDLING IN INTEGRAL NOISE SHAPING OF PULSE WIDTH MODULATION
    3.
    发明申请
    DIGITAL SATURATION HANDLING IN INTEGRAL NOISE SHAPING OF PULSE WIDTH MODULATION 有权
    脉冲宽度调制的整体噪声形状数字饱和处理

    公开(公告)号:US20070109165A1

    公开(公告)日:2007-05-17

    申请号:US11273286

    申请日:2005-11-14

    IPC分类号: H03M1/66

    CPC分类号: H03M3/366 H03M3/432 H03M3/452

    摘要: An audio amplifier includes a digital signal processor (DSP) that contains a noise shaping quantizer having an integrating error amplifier. The integrating error amplifier contains integrators connected in a feedback loop, a summer supplied with an output of each of the integrators, and a saturation function module producing a saturation function. A multiplier is disposed between each pair of adjacent integrators. The multiplier receives a signal from one of the adjacent integrators and the saturation function and supplies a signal to the other of the adjacent integrators. The saturation function decreases the effect of all of the integrators except an integrator to which an input signal to the integrating amplifier is supplied using an input signal to and/or an output signal from the noise shaping quantizer. This permits the duty ratio of the output signal from the noise shaping quantizer to extend from 0% to 100%.

    摘要翻译: 音频放大器包括包含具有积分误差放大器的噪声整形量化器的数字信号处理器(DSP)。 积分误差放大器包含连接在反馈回路中的积分器,与每个积分器的输出相加的夏季以及产生饱和功能的饱和功能模块。 在每对相邻的积分器之间设置乘法器。 乘法器接收来自相邻积分器之一的信号和饱和度函数,并向相邻的积分器中的另一个提供信号。 饱和功能降低了除了积分器之外的所有积分器的影响,使用来自噪声整形量化器的输入信号和/或来自噪声整形量化器的输出信号向积分放大器提供输入信号。 这允许来自噪声整形量化器的输出信号的占空比从0%延伸到100%。

    Method and apparatus for wide dynamic range reduction
    4.
    发明申请
    Method and apparatus for wide dynamic range reduction 有权
    用于宽动态范围缩小的方法和装置

    公开(公告)号:US20070041474A1

    公开(公告)日:2007-02-22

    申请号:US11207843

    申请日:2005-08-19

    IPC分类号: H04L27/22

    CPC分类号: H04L27/22

    摘要: The present invention discloses a method and apparatus for wide dynamic range phase conversion. In one embodiment, inphase and quadrature signal components of a complex input signal are collapsed into a single quadrant to produce a first signal representation. A scaling operation is subsequently performed on the first signal representation to produce a second signal representation. Lastly, the second signal representation is converted into the phase domain.

    摘要翻译: 本发明公开了一种用于宽动态范围相位转换的方法和装置。 在一个实施例中,复合输入信号的同相和正交信号分量被折叠成单个象限以产生第一信号表示。 随后对第一信号表示执行缩放操作以产生第二信号表示。 最后,第二信号表示被转换成相位域。

    Time-weighted trimmed-mean filtering apparatus and method
    6.
    发明授权
    Time-weighted trimmed-mean filtering apparatus and method 失效
    时间加权微调平均滤波装置及方法

    公开(公告)号:US6115727A

    公开(公告)日:2000-09-05

    申请号:US961480

    申请日:1997-10-31

    IPC分类号: G06F17/10 G06F7/00

    CPC分类号: G06F17/10

    摘要: An apparatus and method of filtering at least one set of data comprises determining a subset of Q data elements of a set of L data elements (12), and determining a filtered value based upon the subset of Q data elements (14). Each of the subset of Q data elements is greater than at most a first predetermined number of the L data elements and greater than or equal to at least a second predetermined number of the L data elements other than itself.

    摘要翻译: 滤波至少一组数据的装置和方法包括确定一组L个数据元素(12)中的Q个数据元素的子集,以及基于Q个数据元素(14)的子集来确定滤波值。 Q个数据元素的子集中的每一个大于至少第一预定数量的L个数据元素,并且大于或等于至少第二预定数量的L个数据元素,而不是其自身。