公开(公告)号：EP1033812B1

公开(公告)日：2005-08-10

申请号：EP99830112.1

申请日：1999-03-03

Applicant: STMicroelectronics S.r.l.

Inventor： Ferri, Simone ,  Molinari, Luca ,  Bianchessi, Marco

IPC: H03H17/06

CPC classification number: H03H17/0671 ,  H03M3/508

公开(公告)号：EP1033812A1

公开(公告)日：2000-09-06

申请号：EP99830112.1

申请日：1999-03-03

Applicant: STMicroelectronics S.r.l.

Inventor： Ferri, Simone ,  Molinari, Luca ,  Bianchessi, Marco

IPC: H03H17/06

CPC classification number: H03H17/0671 ,  H03M3/508

Abstract: An oversampling architecture for interpolating, filtering and reconstructing a digital signal has a first chain of derivators receiving at an input of a first derivator of the chain said digital signal and composed of a number k-l of derivators in cascade functioning at a certain clock frequency ( 1/T ), the first derivator having a certain number of bits ( B ) and the derivators that follow having a number of bits incremented by a unit in respect to the number of bits of the derivator that precede it in said cascade. A second chain of the same number k-l of integrators in cascade, functions at a clock frequency N times higher ( N/T ) than the clock frequency ( 1/T ) of said derivators. The last integrator of the cascade has a number of bits equal to the number of bits ( B ) of the first derivator incremented by a factor equivalent to the order ( k ) of the filter multiplied by the interpolation gain ( G ), and the integrators that precede it have a number of bits gradually decremented by a quantity equal to the interpolation gain ( G ) in respect to the number of bit of the integrator that follows it in the cascade. A "sample&hold" circuit has an input coupled to the output of the last derivator of said first chain and an output coupled to the input of the first integrator of said second chain. The last integrator of said second chain outputs the oversampled, filtered and reconstructed signal.

Abstract translation: 用于内插，滤波和重建数字信号的过采样架构具有第一链导数器，其在链的第一导数器的输入处接收所述数字信号，并且由在特定时钟频率（1）级联地工作的第k个导数器组成 / T），第一导数器具有一定数量的比特（B），并且随后的导数器具有相对于在所述级联中的导数之前的导数的比特数增加一个单位的比特数。 级联的相同数量的k-1个积分器的第二链在时钟频率下比在所述推导器的时钟频率（1 / T）高出N倍（N / T）的功能。 级联的最后一个积分器具有等于第一推导器的比特数（B）的位数，该比特数乘以与滤波器乘以插值增益（G）的阶数（k）相乘的因子，积分器 其前面具有相对于在级联中跟随它的积分器的位的数量等于内插增益（G）的量逐渐递减的位数。 “采样和保持”电路具有耦合到所述第一链的最后导数器的输出的输入端和耦合到所述第二链路的第一积分器的输入的输出。 所述第二链的最后一个积分器输出过采样，滤波和重建的信号。

公开(公告)号：EP0874523B1

公开(公告)日：2004-03-03

申请号：EP97830188.5

申请日：1997-04-24

Applicant: STMicroelectronics S.r.l.

Inventor： Mancuso, Massimo ,  Poluzzi, Rinaldo ,  D'Alto, Viviana ,  Molinari, Luca

IPC: H04N7/01 ,  H04N5/44

CPC classification number: H04N7/0132 ,  H04N5/145 ,  H04N7/014

公开(公告)号：EP0874523A1

公开(公告)日：1998-10-28

申请号：EP97830188.5

申请日：1997-04-24

Applicant: STMicroelectronics S.r.l.

Inventor： Mancuso, Massimo ,  Poluzzi, Rinaldo ,  D'Alto, Viviana ,  Molinari, Luca

IPC: H04N7/01 ,  H04N5/44

CPC classification number: H04N7/0132 ,  H04N5/145 ,  H04N7/014

Abstract: A method and a device for motion estimated and compensated Field Rate Up-conversion (FRU) for video applications, providing for: a) dividing an image field to be interpolated into a plurality of image blocks (IB), each image block made up of a respective set of image elements of the image field to be interpolated; b) for each image block (K(x,y)) of at least a sub-plurality (Q1,Q2) of said plurality of image blocks, considering a group of neighboring image blocks (NB[1]-NB[4]); c) determining an estimated motion vector for said image block (K(x,y)), describing the movement of said image block (K(x,y)) from a previous image field to a following image field between which the image field to be interpolated is comprised, on the basis of predictor motion vectors (P[1]-P[4]) associated to said group of neighboring image blocks; d) determining each image element of said image block (K(x,y)) by interpolation of two corresponding image elements in said previous and following image fields related by said estimated motion vector. Step c) provides for: c1) applying to the image block (K(x,y)) each of said predictor motion vectors to determine a respective pair of corresponding image blocks in said previous and following image fields, respectively; c2) for each of said pairs of corresponding image blocks, evaluating an error function (err[i]) which is the Sum of luminance Absolute Difference (SAD) between corresponding image elements in said pair of corresponding image blocks; c3) for each pair of said predictor motion vectors, evaluating a degree of homogeneity (H(i,j)); c4) for each pair of said predictor motion vectors, applying a fuzzy rule having an activation level (r[k]) which is higher the higher the degree of homogeneity of the pair of predictor motion vectors and the smaller the error functions of the pair of predictor motion vectors; c5) determining an optimum fuzzy rule having the highest activation level (r[opt]), and determining the best predictor motion vector (P[min]) of the pair associated to said optimum fuzzy rule having the smaller error function; c6) determining the estimated motion vector for said image block (K(x,y)) on the basis of said best predictor motion vector (P[min]).

Abstract translation: 一种方法，以及用于运动估计的装置和补偿的场速率向上转换（FRU），用于视频应用，提供了：a）将一个图象场到要插补成图像块IB（多个），每个图像块由的 像场的图像元素的集合respectivement待内插; b）对于每个图像块的（K（X，Y））的至少一个次多个（Q1，图像块的所述多个Q2），考虑一组相邻的图像块（NBÄ1Ü-NBÄ4Ü的）; c）关于对所述图像块（（K X，Y））描述所述图像块从先前图像场的运动（K（X，Y））传送到按照图像场估计的运动矢量确定的采矿其中图像场之间 要被内插包括，关联到所述组的相邻图像块的预测运动向量（PÄ1Ü-PÄ4Ü）的基础上; D）确定的采矿通过在由所述相关所述先前和以下图像场两个相应的图像元素的插值，所述图像块的每个图像元素（K（X，Y））估计的运动矢量。 步骤c）提供：C1）施加到图像块（K（X，Y）），每个所述的预测运动矢量的确定性矿一对分别在前面的说respectivement对应的图像块和图像下列字段的; C2）对于每个所述对相应的图像块，误差函数（errÄiÜ）的评价的所有这是在所述的一对相应的图像块对应的图像元素之间的亮度绝对差（SAD）的总和; C3）对于每对预测的运动矢量的所述，评估的均匀度（H（I，J））; C4）对于每对所述的预测运动矢量的，施加具有在激活电平（乐）所有这是一种模糊规则更高的对预测运动矢量的均匀度和更高的对预测的运动的误差函数较小 矢量; C5）在具有最高活化水平（rÄoptÜ）最佳的模糊规则，和确定性采矿确定性采矿相关联以具有较小的误差函数所述最佳模糊规则对中的最佳预测运动向量（PÄminÜ）; C6）确定性采矿用于所述最佳预测运动向量（PÄminÜ）的基础上，所述图像块（K（X，Y））的估计的运动矢量。