Method and apparatus for spectrum estimation
    1.
    发明授权
    Method and apparatus for spectrum estimation 失效
    频谱估计的方法和装置

    公开(公告)号:US08503814B2

    公开(公告)日:2013-08-06

    申请号:US12637526

    申请日:2009-12-14

    IPC分类号: G06K9/40

    摘要: An apparatus and methods are provided for determining control parameters for image enhancement. In one embodiment a method for determining control parameters includes receiving image data for a first frame and calculating an adaptive threshold value based on the image data. The method includes determining a pixel slope distribution for a pixel window of the image data, wherein the pixel window is selected based on the adaptive threshold value and determining a spectrum estimation coefficient based on the pixel distribution, wherein the spectrum estimation coefficient is determined based on the spectral components of the image data. The method may then include determining one or more control parameters for enhancement of the image data based on the spectrum estimation coefficient, wherein the one or more control parameters relate to filtering parameters for adaptive enhancement of image data.

    摘要翻译: 提供了一种用于确定用于图像增强的控制参数的装置和方法。 在一个实施例中,用于确定控制参数的方法包括接收第一帧的图像数据并基于图像数据计算自适应阈值。 该方法包括确定图像数据的像素窗口的像素斜率分布,其中基于自适应阈值选择像素窗口,并且基于像素分布来确定频谱估计系数,其中基于 图像数据的光谱分量。 该方法然后可以包括基于频谱估计系数确定用于增强图像数据的一个或多个控制参数,其中一个或多个控制参数涉及用于图像数据的自适应增强的滤波参数。

    Method and Apparatus for Spectrum Estimation
    2.
    发明申请
    Method and Apparatus for Spectrum Estimation 失效
    频谱估计的方法和装置

    公开(公告)号:US20100183238A1

    公开(公告)日:2010-07-22

    申请号:US12637526

    申请日:2009-12-14

    IPC分类号: G06K9/40

    摘要: An apparatus and methods are provided for determining control parameters for image enhancement. In one embodiment a method for determining control parameters includes receiving image data for a first frame and calculating an adaptive threshold value based on the image data. The method includes determining a pixel slope distribution for a pixel window of the image data, wherein the pixel window is selected based on the adaptive threshold value and determining a spectrum estimation coefficient based on the pixel distribution, wherein the spectrum estimation coefficient is determined based on the spectral components of the image data. The method may then include determining one or more control parameters for enhancement of the image data based on the spectrum estimation coefficient, wherein the one or more control parameters relate to filtering parameters for adaptive enhancement of image data.

    摘要翻译: 提供了一种用于确定用于图像增强的控制参数的装置和方法。 在一个实施例中,用于确定控制参数的方法包括接收第一帧的图像数据并基于图像数据计算自适应阈值。 该方法包括确定图像数据的像素窗口的像素斜率分布,其中基于自适应阈值选择像素窗口,并且基于像素分布来确定频谱估计系数,其中基于 图像数据的光谱分量。 该方法然后可以包括基于频谱估计系数确定用于增强图像数据的一个或多个控制参数,其中一个或多个控制参数涉及用于图像数据的自适应增强的滤波参数。

    Arithmetic unit in a vector signal processor using pipelined
computational blocks
    4.
    发明授权
    Arithmetic unit in a vector signal processor using pipelined computational blocks 失效
    使用流水线计算块的矢量信号处理器中的算术单元

    公开(公告)号:US5053987A

    公开(公告)日:1991-10-01

    申请号:US430815

    申请日:1989-11-02

    摘要: An arithmetic unit for a vector signal processor implements IEEE Standard 754 for Floating-Point Arithmetic. The arithmetic unit includes three pipelined floating-point computational blocks: a multiplier, an adder-subtracter, and an adder to provide for high computation throughput for digital signal processing (DSP) operations. The adder-subtracter and the adder have the same input operands, so that the sum and difference of these input operands can be computed simultaneously. A first and a second internal data bus are provided for transferring data and instructions within the arithmetic execution unit. The input/output operands and partial results are stored in a set of auxiliary registers. Most of these registers can be organized in pairs that for complex arithmetic computations are used to store the real and the imaginary parts of a complex operand. A register-pair can also simultaneously handle two different real operands. The operands are fetched from an internal data buffer from, for example, sources internal to the integrated circuit such as internal RAM, ROM and arithmetic registers. Computation results from the Multiplier, the Adder, and the Adder-Subtracter are temporary stored in the auxiliary registers before writing to the internal RAM or arithmetic registers of the integrated circuit. Data-flow in the vector arithmetic unit is controlled by a vector control unit.

    摘要翻译: 用于矢量信号处理器的算术单元实现用于浮点算术的IEEE标准754。 算术单元包括三个流水线浮点计算块:乘法器,加法器 - 减法器和加法器,用于为数字信号处理(DSP)操作提供高计算吞吐量。 加法器 - 减法器和加法器具有相同的输入操作数,使得可以同时计算这些输入操作数的和和差。 第一和第二内部数据总线被提供用于在算术执行单元内传送数据和指令。 输入/输出操作数和部分结果存储在一组辅助寄存器中。 大多数这些寄存器可以成对组织,用于复杂算术计算用于存储复数操作数的实部和虚部。 寄存器对也可以同时处理两个不同的实际操作数。 操作数从内部数据缓冲器中取出,例如内部RAM,ROM和算术寄存器等集成电路内部的源。 在写入集成电路的内部RAM或算术寄存器之前,乘法器,加法器和加法器 - 减法器的计算结果临时存储在辅助寄存器中。 矢量运算单元中的数据流由矢量控制单元控制。