公开(公告)号：US20050169387A1

公开(公告)日：2005-08-04

申请号：US10767596

申请日：2004-01-29

申请人： Krishna Ratakonda ,  Ashish Jagmohan

发明人： Krishna Ratakonda ,  Ashish Jagmohan

IPC分类号： H04N7/26 ,  H04B1/66

CPC分类号： H04N19/39 ,  H04N19/37

摘要： A system for the introduction of controlled correlation among multiple redundant representations of predictively encoded signals while avoiding predictive mismatch at a receiver when any given sub-set of the multiple representations is received. The system embodies a signal encoder and decoder. The decoder can comprise at least two signal adders for respectively receiving coefficient values and adding at least one predictive value transform to the coefficient value in order to generate and transmit a second set of coefficient values. The second set of coefficient values is subsequently received by a decoder means, wherein the decoder means transforms the received coefficient values and transmits the resultant coefficient values to a signal adder. Upon reception of the transformed coefficient values, the signal adder generates a third set of coefficient values; the third set of coefficients being used to reconstruct an approximate version of an encoded signal.

摘要翻译： 一种用于在预测编码信号的多个冗余表示之间引入受控相关性的系统，同时在接收到多个表示的任何给定子集时避免接收机处的预测失配。 该系统体现了信号编码器和解码器。 解码器可以包括用于分别接收系数值的至少两个信号加法器，并且将至少一个预测值变换加到系数值，以便产生和发送第二组系数值。 第二组系数值随后由解码器装置接收，其中解码器装置变换接收到的系数值，并将所得到的系数值发送到信号加法器。 在接收到变换的系数值时，信号加法器产生第三组系数值; 第三组系数用于重建编码信号的近似版本。

公开(公告)号：US06307569B1

公开(公告)日：2001-10-23

申请号：US09273249

申请日：1999-03-18

申请人： Krishna Ratakonda

发明人： Krishna Ratakonda

IPC分类号： G06T340

CPC分类号： G06T3/4084

摘要： A method for enlarging a digital image includes selecting an initial image having a size N×N; determining a low frequency portion and a high frequency portion of the initial image; defining a model image having fixed bounds for each pixel therein; estimating a final image having a size pN×pN; determining a low frequency portion and a high frequency portion of the estimated final image; determining a pN×pN FFT; replacing the low frequency portion of the estimated final image with the low frequency portion of the initial image to form an intermediate estimated image; and modifying the intermediate estimated image by I-FFT to form a modified estimated image, correcting each pixel in the modified estimated image by a corresponding pixel in the model image to limit variation from the model image until the pixels of a final image are within the bounds of the model image.

摘要翻译： 一种用于放大数字图像的方法包括：选择尺寸为N×N的初始图像; 确定初始图像的低频部分和高频部分; 定义其中每个像素具有固定界限的模型图像; 估计具有大小pN×pN的最终图像; 确定估计的最终图像的低频部分和高频部分; 确定pNxpN FFT; 用初始图像的低频部分代替估计的最终图像的低频部分以形成中间估计图像; 以及通过I-FFT修改所述中间估计图像以形成经修改的估计图像，通过所述模型图像中的对应像素校正所述修改的估计图像中的每个像素，以限制与所述模型图像的变化，直到最终图像的像素在 模型图像的界限。

公开(公告)号：US06285711B1

公开(公告)日：2001-09-04

申请号：US09082456

申请日：1998-05-20

申请人： Krishna Ratakonda ,  M. Ibrahim Sezan

发明人： Krishna Ratakonda ,  M. Ibrahim Sezan

IPC分类号： H04N718

CPC分类号： H04N19/533

摘要： A method of estimating a motion field includes estimating a first motion vector component from a source average vector and a target average vector; displacing the search area according to the first motion vector component; and estimating a second motion vector component from the displaced search area.

摘要翻译： 估计运动场的方法包括从源平均矢量和目标平均矢量估计第一运动矢量分量; 根据第一运动矢量分量移位搜索区域; 以及从所述偏移搜索区域估计第二运动矢量分量。