SYSTEM AND PROCESS FOR IMAGE RESCALING WITH EDGE ADAPTIVE PHASE CONTROL IN INTERPOLATION PROCESS
    42.
    发明申请
    SYSTEM AND PROCESS FOR IMAGE RESCALING WITH EDGE ADAPTIVE PHASE CONTROL IN INTERPOLATION PROCESS 有权
    用于边缘自适应相位控制的图像重建系统和过程

    公开(公告)号:US20090262247A1

    公开(公告)日:2009-10-22

    申请号:US12406832

    申请日:2009-03-18

    IPC分类号: G06K9/40 H04N5/21

    CPC分类号: G06T3/403 G06T2200/28

    摘要: A video image processing system is described that generates the interpolated video images with sharp and jaggedness-free edges. A method of video image processing is also described that interpolates video images to generate the video images with sharp and jaggedness-free edges. The video image processing system receives and makes input image data available for further processing; analyzes the local features of the input image data; filters the input image data before performing interpolation process; modifies the phase value adaptive to the local edge distance; rescales the input image data in horizontal interpolation using the modified phase value; and rescales the horizontally interpolated image data in vertical interpolation using modified phase value.

    摘要翻译: 描述了一种视频图像处理系统,其生成具有锐利和无锯齿边缘的内插视频图像。 还描述了一种视频图像处理方法,其内插视频图像以产生具有锐利和无锯齿边缘的视频图像。 视频图像处理系统接收并使输入图像数据可用于进一步处理; 分析输入图像数据的局部特征; 在进行插值处理之前对输入图像数据进行滤波; 修改自适应局部边缘距离的相位值; 使用修改的相位值在水平插值中调整输入图像数据; 并使用修改的相位值在垂直内插中重新调整水平内插图像数据。

    Moving pictures encoding with constant overall bit-rate
    43.
    发明授权
    Moving pictures encoding with constant overall bit-rate 有权
    以恒定的总比特率运动图像编码

    公开(公告)号:US07496142B2

    公开(公告)日:2009-02-24

    申请号:US11386184

    申请日:2006-03-22

    IPC分类号: H04N7/12

    摘要: A method and apparatus control bit rates used in a moving pictures encoder, such as an MPEG standard encoder. A sequence of moving pictures is divided into segments each of which comprises one or more groups of pictures. A constant overall bit rate is specified for the sequence of pictures, but variable bit rate encoding used within each segment. A difference between the number of bits allocated for encoding the segment and the actual bits used for encoding is determined, and the difference distributed over one or more subsequent segments.

    摘要翻译: 一种方法和装置控制在诸如MPEG标准编码器的运动图像编码器中使用的比特率。 一系列运动图像被分成多个段,每个段包括一组或多组图像。 为图像序列指定恒定的总比特率,但在每个片段中使用可变比特率编码。 确定分配用于编码段的位数与用于编码的实际位之间的差异,并且差异分布在一个或多个后续段上。

    Method and device for compressing an image signal based upon differential quantization of data
    44.
    发明授权
    Method and device for compressing an image signal based upon differential quantization of data 有权
    基于数据的差分量化压缩图像信号的方法和装置

    公开(公告)号:US07286714B2

    公开(公告)日:2007-10-23

    申请号:US10251658

    申请日:2002-09-19

    IPC分类号: G06K9/36 G06K9/46

    摘要: Method of compressing a digital image signal in which a first quantization step set, which is unique for a given segment, is determined so that the number of bits needed to encode the quantized data corresponding to this segment is greater than a target value. This first quantization step set then being modified, as a priority, for the blocks of the segment for which the gain, in the course of this modification, on the reduction of the number of bits needed to encode the quantized data corresponding to the segment to which it belongs, is the highest. This modification is carried out, on as many blocks as is necessary for the number of bits of this segment to be less than or equal to the target value. Device to implement this method.

    摘要翻译: 对数字图像信号进行压缩的方法,其中确定对于给定段是唯一的第一量化步长集合,使得对与该段相对应的量化数据进行编码所需的位数大于目标值。 作为优先级,该第一量化步长作为优先级被修改为在该修改过程中增益对于其对应于该段的量化数据进行编码所需的位数减少的段的块 它属于哪个,是最高的。 在该段的位数小于或等于目标值所需的块上执行该修改。 设备实现这种方法。

    Spatio-temporal video noise reduction system
    45.
    发明授权
    Spatio-temporal video noise reduction system 有权
    时空视频降噪系统

    公开(公告)号:US07145607B1

    公开(公告)日:2006-12-05

    申请号:US10130093

    申请日:1999-11-11

    申请人: Yau Wai Lucas Hui

    发明人: Yau Wai Lucas Hui

    IPC分类号: H04N5/21

    CPC分类号: H04N5/21 H04N19/51 H04N19/80

    摘要: A method and system for digital video noise reduction which includes a picture analyser (103) for analysing pictures in a video sequence to determine the amount of moving regions therein, a noise level detector (102) for estimating the noise level (N) in the video sequence, a filtering level estimator (105, 103) for determining a maximum filtering level (L) for each picture based on the amount of moving regions and the estimated noise level (N) and a spatial filter (106) and a temporal filter (107), the temporal filter being coupled to the filter level estimator for controlling the level of filtering of each picture in the sequence in accordance with the maximum filtering level.

    摘要翻译: 一种用于数字视频噪声降低的方法和系统,包括用于分析视频序列中的图像以确定其中的移动区域的量的图像分析器(103),用于估计在其中的噪声水平(N)的噪声水平检测器 视频序列,滤波电平估计器(105,103),用于基于运动区域的数量和估计的噪声电平(N)确定每个图像的最大滤波电平(L),以及空间滤波器(106)和时间滤波器 (107),所述时间滤波器耦合到所述滤波器级估计器,用于根据所述最大滤波电平来控制所述序列中的每个图像的滤波电平。

    Video signal noise level estimator
    46.
    发明授权
    Video signal noise level estimator 有权
    视频信号噪声电平估计器

    公开(公告)号:US07046307B1

    公开(公告)日:2006-05-16

    申请号:US10129910

    申请日:1999-11-11

    申请人: Yau Wai Lucas Hui

    发明人: Yau Wai Lucas Hui

    IPC分类号: H04N5/14

    CPC分类号: H04N17/004 H04N17/00

    摘要: A method and apparatus for noise level estimation in a digital video signal, the apparatus including a pixel activity detector that produces a mean pixel activity level for each picture in the video signal, a contrast analyzer that produces a contrast activity level for each picture and a noise level calculator that is coupled to the activity detector and contrast analyzer to produce an estimated noise level by offsetting the contrast activity level from accumulated output of the activity detector.

    摘要翻译: 一种用于数字视频信号中的噪声电平估计的方法和装置,该装置包括:对视频信号中的每个图像产生平均像素活动度的像素活动检测器;对每个图像产生对比度活动度的对比度分析器;以及 噪声电平计算器,其耦合到活动检测器和对比度分析器,以通过将对比度活动水平与活动检测器的累积输出相抵消来产生估计的噪声水平。

    Adaptive coring for video peaking
    47.
    发明申请
    Adaptive coring for video peaking 有权
    视频峰值的自适应取芯

    公开(公告)号:US20050012866A1

    公开(公告)日:2005-01-20

    申请号:US10850963

    申请日:2004-05-20

    摘要: A processor for enhancing an input luminance signal including: a means for calculating a chroma edge value associated with the input luminance signal; a means for measuring a luminance gradient associated with the input luminance signal; a peaking filter for processing the input luminance signal; a gain adjustment circuit having a gain function that is adjustable relative to the calculated chroma edge value, the gain adjustment circuit being operable to adjust the magnitude of the output of the peaking filter wherein: in a first range of luminance gradients, the output is an attenuated version of the input; in a second range of luminance gradients the output is directly proportional to the input; in a third range of luminance gradients, the output is inversely proportional to the input; wherein said enhanced luminance signal is the sum of the input and output of the peaking filter.

    摘要翻译: 一种用于增强输入亮度信号的处理器,包括:用于计算与输入亮度信号相关联的色度边缘值的装置; 用于测量与输入亮度信号相关联的亮度梯度的装置; 用于处理输入亮度信号的峰值滤波器; 所述增益调整电路具有相对于所计算的色度边缘值可调节的增益函数,所述增益调整电路可操作以调整所述峰值滤波器的输出的幅度,其中:在亮度梯度的第一范围内,所述输出为 衰减版本的输入; 在第二个亮度梯度范围内,输出与输入成正比; 在第三个亮度梯度范围内,输出与输入成反比; 其中所述增强亮度信号是峰值滤波器的输入和输出的总和。

    Conditional masking for video encoder
    48.
    发明授权
    Conditional masking for video encoder 有权
    视频编码器的条件掩码

    公开(公告)号:US06826228B1

    公开(公告)日:2004-11-30

    申请号:US09700071

    申请日:2001-01-26

    申请人: Yau Wai Lucas Hui

    发明人: Yau Wai Lucas Hui

    IPC分类号: H04B166

    摘要: This method and apparatus described herein imposes masking factors to the determined quantization step sizes of macroblocks of a video sequence such that encoding efficiency is increased. A conditional masking method can be used to take advantage of the fact that P-pictures are more important than B-pictures in terms of motion and scene updates as coding noise in such updates are likely propagated by P-pictures. The masking can be applied conditionally to motion/scene update regions of a picture such that coding noise is reduced and therefore bits are saved from less propagation of this noise. Before encoding each macroblock of a picture from an input video sequence, a video encoder with conditional masking determines if the macroblock type belongs to a significant motion or scene update region. A conditional masking factor is then determined for the macroblock based on the determined macroblock type and the picture coding type. The conditional masking factor is combined with a macroblock reference quantization step-size which may be calculated using conventional methods based on bit allocation and bit utilization, and an optional activity masking factor based on activity level of the macroblock and/or its surrounding region to form the final quantization step-size for coding of the macroblock.

    摘要翻译: 这里描述的方法和装置对所确定的视频序列的宏块的量化步长施加掩蔽因子,使得编码效率增加。 可以使用条件屏蔽方法来利用P图像在运动和场景更新方面比B图像更重要的事实,因为这样的更新中的编码噪声可能由P图像传播。 掩蔽可以有条件地应用于图像的运动/场景更新区域,使得编码噪声减小,因此从该噪声的较少传播中节省了比特数。 在从输入视频序列对图像的每个宏块进行编码之前,具有条件掩码的视频编码器确定宏块类型是否属于有效运动或场景更新区域。 然后,基于所确定的宏块类型和图像编码类型,为宏块确定条件屏蔽因子。条件屏蔽因子与可以使用基于位分配和位利用的常规方法计算的宏块参考量化步长进行组合 ,以及基于宏块和/或其周围区域的活动级别的可选活动屏蔽因子,以形成用于宏块编码的最终量化步长。