公开(公告)号：US5559905A

公开(公告)日：1996-09-24

申请号：US125530

申请日：1993-09-22

Applicant: Lance Greggain ,  Peter Mandl ,  Bruce Intihar

Inventor： Lance Greggain ,  Peter Mandl ,  Bruce Intihar

IPC: H04N5/262 ,  G06T3/40 ,  G09G5/36 ,  G06K9/32

CPC classification number: G06T3/4007

Abstract: In an apparatus for resizing an image, comprising interpolation filter means for receiving a stream of input pixels having a predetermined sampling period P and a first sampling rate of S pixels/lines, and interpolating the stream of input pixels at a predetermined interpolation rate for generating a first derived sample stream of pixels having a further sampling period (M/(CL))P and a second sampling rate of T pixels/lines, where L is a first positive integer greater than one, C is a positive integer and M is smaller than CL, and where either 2.sup.n M/CL or 2.sup.-n M/CL is equal to time step increment M/L and the absolute value of n is at least equal to zero, and octave filtering means having a predetermined sampling rate which is related to the interpolation rate of the interpolation filter, for receiving the first derived sample stream of pixels and in response generating a stream of filtered output pixels having a sample period of (M/L)P, the improvement comprising means within the interpolation filter means for aligning the stream of input pixels and the first derived stream of sampled pixels at the boundaries of the image.

Abstract translation: 在用于调整图像大小的装置中，包括内插滤波器装置，用于接收具有预定采样周期P和S像素/行的第一采样率的输入像素流，并且以预定的插值率内插输入像素流以产生 具有另外的采样周期（M /（CL））P和T像素/行的第二采样率的第一派生取样流，其中L是大于1的第一正整数，C是正整数，M是 小于CL，并且其中2nM / CL或2-nM / CL等于时间步长M / L并且n的绝对值至少等于零，并且八度滤波装置具有相关的预定采样率 对于内插滤波器的内插速率，为了接收第一导出的像素样本流，并且响应于产生具有（M / L）P的采样周期的滤波输出像素流，该改进包括在插值内的装置 在图像的边界处对准输入像素流和采样像素的第一导出流。

公开(公告)号：US5479454A

公开(公告)日：1995-12-26

申请号：US124201

申请日：1993-09-21

Applicant: Lance Greggain ,  Peter Mandl

Inventor： Lance Greggain ,  Peter Mandl

IPC: H03H17/02 ,  H04B1/10 ,  H03H7/30

CPC classification number: H03H17/0233

Abstract: A digital filter characterized by a plurality of filter coefficients, positive ones of the coefficients being represented by unsigned binary integers and negative ones of the coefficients being represented by 2's complement binary integers, comprising an input for receiving a digital input signal comprising a first predetermined number of bits; means for truncating or rounding at least one leading "0" or trailing "0" of the positive ones of the coefficients and at least one leading "1" or trailing "0" of the negative ones of the coefficients, such that significance of the integers is removed; means for successively delaying the digital input signal to produce successively delayed versions of the digital input signal; means for multiplying the successively delayed versions of the digital input signal by respective ones of the truncated representations of the respective ones of the plurality of filter coefficients and in response generating a plurality of intermediate product integers; means for restoring significance to the intermediate product integers; and means for summing the intermediate product integers and in response generating a digital output signal.

Abstract translation: 一种数字滤波器，其特征在于多个滤波器系数，所述系数中的正的系数由无符号二进制整数表示，负的系数由2的补码二进制整数表示，包括用于接收数字输入信号的输入，该数字输入信号包括第一预定数 的位; 用于截断或舍入系数中的正系数的至少一个前导“0”或尾随“0”以及系数中的负系数的至少一个前导“1”或尾随“0”，使得 整数被删除; 用于连续延迟数字输入信号以产生数字输入信号的连续延迟版本的装置; 用于将所述数字输入信号的连续延迟版本乘以所述多个滤波器系数中的相应滤波器系数的相应的截断表示并且响应于产生多个中间乘积整数的装置; 恢复中间产品整数意义的手段; 以及用于对中间乘积整数求和并且响应于产生数字输出信号的装置。

公开(公告)号：US5550764A

公开(公告)日：1996-08-27

申请号：US413895

申请日：1995-03-30

Applicant: Peter Mandl

Inventor： Peter Mandl

IPC: H03H17/06 ,  G06F17/10

CPC classification number: H03H17/0664

Abstract: A decimator for effecting a X:1 decimation, where X=is any positive integer greater than 1, comprising a FIR filter for receiving and filtering an input stream of data bits and in response generating a like number of filtered output data bits; and a hold circuit for sampling and outputting every Xth one of the filtered output data bits.

Abstract translation: 用于进行X：1抽取的抽取器，其中X =是大于1的任何正整数，包括用于接收和过滤数据位的输入流的FIR滤波器，并且响应于产生相似数目的滤波输出数据位; 以及保持电路，用于对每个第十个滤波输出数据位进行采样和输出。

公开(公告)号：US5440653A

公开(公告)日：1995-08-08

申请号：US126388

申请日：1993-09-24

Applicant: Lance Greggain ,  Peter Mandl

Inventor： Lance Greggain ,  Peter Mandl

IPC: H04N5/262 ,  G06T3/40 ,  G06T5/20 ,  H04N1/409 ,  G06K9/36

CPC classification number: G06T5/20

Abstract: In a multi-rate digital signal processing system for re-sizing an image in at least two segments using at least two symmetric T-tap digital filters each having T kernel-function weighting coefficients, where T is an odd plural integer, a first one of the segments being characterized by a first plurality of unfiltered pixels and second adjacent one of the segments being characterized by a second plurality of unfiltered pixels, a predetermined one of the unfiltered pixels being common to both the first and the second plurality at the image boundary of the two segments, the improvement comprising a method of seamlessly extending the image across the image boundary, comprising the steps of multiplying the (T-1)/2 of the first plurality and the second plurality of the unfiltered pixels adjacent the predetermined one of the pixels by two times respective ones of the kernel function weighting coefficients for generating the first and second mirrored half kernel intermediate multiplication products; multiplying the predetermined one of the pixels by a center-tap kernel-function weighting coefficient of the digital filter to generate an additional intermediate multiplication product; adding the first mirrored half-kernel intermediate multiplication products and the additional intermediate multiplication product to generate a first segment estimated boundary filtered output pixel; adding the second mirrored half-kernel intermediate multiplication products and the additional intermediate multiplication product to generate a second segment estimated boundary filtered output pixel; and averaging the first segment estimated boundary filtered output pixel and the segment.

Abstract translation: 在多速率数字信号处理系统中，使用至少两个对称T抽头数字滤波器来对至少两个段中的图像进行尺寸调整，所述至少两个对称T抽头数字滤波器具有T个内核功能加权系数，其中T是奇数多个整数，第一个 所述段的特征在于第一多个未过滤的像素，并且所述段中的第二相邻一个的特征在于第二多个未过滤的像素，所述未滤波像素中的预定的一个在图像边界处对于第一和第二多个共同 所述改进包括一种使图像跨越图像边界无缝扩展的方法，包括以下步骤：将第一多个的（T-1）/ 2和与预定的 像素乘以两倍的核函数加权系数，用于产生第一和第二镜像半核中间乘法 导管 将预定的一个像素乘以数字滤波器的中心抽头核函数加权系数，以产生附加的中间乘法乘积; 添加第一镜像半核中间乘法乘积和附加中间乘法乘积以产生第一段估计边界滤波输出像素; 添加第二镜像半核中间乘法乘积和附加中间乘法乘积以生成第二段估计的边界滤波输出像素; 并且对第一段估计的边界滤波输出像素和段进行平均。