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102 条记录 (耗时 0.035 秒)

    METHODS AND APPARATUS FOR IMPROVED QUANTIZATION ROUNDING OFFSET ADJUSTMENT FOR VIDEO ENCODING AND DECODING
    92.
    发明申请
    METHODS AND APPARATUS FOR IMPROVED QUANTIZATION ROUNDING OFFSET ADJUSTMENT FOR VIDEO ENCODING AND DECODING 有权
    用于改进视频编码和解码的改进量化偏移调整的方法和装置

    公开(公告)号：US20120051421A1

    公开(公告)日：2012-03-01

    申请号：US13319779

    申请日：2010-05-12

    申请人： Xiaoan Lu ,  Qian Xu ,  Cristina Gomila

    发明人： Xiaoan Lu ,  Qian Xu ,  Cristina Gomila

    IPC分类号： H04N7/26

    CPC分类号： H04N19/179 ,  H04N19/124 ,  H04N19/14 ,  H04N19/159 ,  H04N19/17 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176

    摘要： There are provided methods and apparatus for improved quantization rounding offset adjustment for video encoding and decoding. An apparatus includes a video encoder for encoding an input coding unit by determining a residual for the input coding unit corresponding to a difference between the input coding unit and a reference coding unit, applying a transform to the residual to obtain at least one transform coefficient, and quantizing the at least one transform coefficient by selecting a particular quantization step size and a rounding offset.

    摘要翻译： 提供了用于改进用于视频编码和解码的量化舍入偏移调整的方法和装置。 一种装置，包括：视频编码器，用于通过确定与输入编码单元和参考编码单元之间的差异对应的输入编码单元的残差来对输入编码单元进行编码，向残差应用变换以获得至少一个变换系数， 以及通过选择特定的量化步长和舍入偏移量化所述至少一个变换系数。

    METHOD OF ENCODING AN IMAGE AND DEVICE IMPLEMENTING SAID METHOD
    94.
    发明申请
    METHOD OF ENCODING AN IMAGE AND DEVICE IMPLEMENTING SAID METHOD 失效
    编码图像的方法和实现方法的装置

    公开(公告)号：US20100135590A1

    公开(公告)日：2010-06-03

    申请号：US12448119

    申请日：2006-12-11

    申请人： Libo Yang ,  Lihua Zhu ,  Xiaoan Lu

    发明人： Libo Yang ,  Lihua Zhu ,  Xiaoan Lu

    IPC分类号： G06K9/00

    CPC分类号： H04N19/17 ,  H04N19/124 ,  H04N19/14 ,  H04N19/176 ,  H04N19/18 ,  H04N19/60

    摘要： The invention relates to a method of encoding an image divided into non-overlapping macroblocks themselves divided into non-overlapping blocks of N by N pixels into a binary stream. It comprises the steps of: —transforming each of the block into a transformed block of coefficients comprising one low frequency coefficient and N2-1 coefficients, called high frequency coefficients, of higher frequencies than the low frequency; —quantizing each coefficient of each of the transformed blocks with a quantizing parameter; —encoding the quantized coefficients into a binary stream. According to the invention, the low frequency coefficients of the transformed blocks are quantized with a same quantizing parameter, called first quantizing parameter.

    摘要翻译： 本发明涉及一种编码分割为N倍像素的非重叠块的非重叠宏块的图像的二进制流的方法。 它包括以下步骤：将每个块转换成包括一个低频系数的变换的系数块和称为高频系数的N2-1系数，频率高于低频; - 用量化参数量化每个变换块的每个系数; 将量化的系数编码为二进制流。 根据本发明，变换块的低频系数用相同的量化参数量化，称为第一量化参数。

    SPATIAL ACTIVITY METRIC AND METHOD FOR EVALUATING THE SAME
    95.
    发明申请
    SPATIAL ACTIVITY METRIC AND METHOD FOR EVALUATING THE SAME 审中-公开
    空间活动度量及评估方法

    公开(公告)号：US20090268981A1

    公开(公告)日：2009-10-29

    申请号：US12310711

    申请日：2007-09-18

    申请人： Xiaoan Lu ,  Jiefu Zhai ,  Cristina Gomila

    发明人： Xiaoan Lu ,  Jiefu Zhai ,  Cristina Gomila

    IPC分类号： G06K9/40

    CPC分类号： G06T7/41

    摘要： A spatial activity metric for characterizing an image is established, typically based one of the image variance, image gradient or DCT coefficients. The spatial activity metric is then reduced by the amount of the estimated noise in the image so that upon the spatial activity metric in connection with spatial masking, the likelihood of unmasked distortion caused by the presence of noise, such as film grain will be reduced. The effectiveness of such a spatial activity metric can be determined by determining similarity of the measures made by the spatial activity metric for regions in the image of similar texture and by determining the difference in the measures made by the spatial activity metric for regions of different texture in the image.

    摘要翻译： 通常基于图像方差，图像梯度或DCT系数之一建立用于表征图像的空间活动度量。 然后，空间活动度量减小图像中的估计噪声的量，使得在与空间屏蔽相关的空间活动度量时，由于诸如胶片颗粒的噪声的存在而引起的未屏蔽失真的可能性将减小。 这样的空间活动度量的有效性可以通过确定由相似纹理图像中的区域的空间活动度量所做出的度量的相似度，并且通过确定由不同纹理的区域的空间活动度量所做的度量的差异来确定 在图像中。

    System and method for a mobile AD HOC network suitable for aircraft
    96.
    发明申请
    System and method for a mobile AD HOC network suitable for aircraft 审中-公开
    适用于飞机的移动AD HOC网络的系统和方法

    公开(公告)号：US20050090201A1

    公开(公告)日：2005-04-28

    申请号：US10921794

    申请日：2004-08-20

    申请人： Mark Lengies ,  Xiaoan Lu ,  Patrick Reid

    发明人： Mark Lengies ,  Xiaoan Lu ,  Patrick Reid

    IPC分类号： H04W84/18 ,  A62C99/00 ,  H04L12/56 ,  H04W40/20 ,  H04W40/24 ,  H04W40/30 ,  H04W40/32 ,  H04W84/20 ,  H04B7/00

    CPC分类号： H04B7/18506 ,  H04L45/00 ,  H04W40/20 ,  H04W40/30 ,  H04W40/32

    摘要： The present invention provides a wireless ad hoc network suitable for sharing data on a peer-to-peer basis between nodes, some of which may be aircraft, having a terminal device comprising a wireless communications transceiver, a sensor, and a computing device. Multiple hops between nodes maximize range of the network. In addition, architectures for terminal devices allow for use of a wide variety of wireless communications transceivers and sensors, without affecting applications that use the network. Such invention may include, among others, a fire fighting application allowing different aircraft to co-ordinate firefighting activities by using shared fire and positional data for aircraft.

    摘要翻译： 本发明提供一种无线自组织网络，其适于在节点之间在点对点的基础上共享数据，其中一些可以是飞机，具有包括无线通信收发器，传感器和计算设备的终端设备。 节点之间的多跳最大化网络的范围。 此外，终端设备的架构允许使用各种各样的无线通信收发器和传感器，而不影响使用网络的应用。 这样的发明可以包括消防应用，允许不同的飞机通过使用飞机的共享火和位置数据来协调消防活动。

    Method and apparatus for joint quantization parameter adjustment
    98.
    发明授权
    Method and apparatus for joint quantization parameter adjustment 有权
    联合量化参数调整的方法和装置

    公开(公告)号：US08848788B2

    公开(公告)日：2014-09-30

    申请号：US12800263

    申请日：2010-05-12

    申请人： Xiaoan Lu ,  Qian Xu ,  Cristina Gomila

    发明人： Xiaoan Lu ,  Qian Xu ,  Cristina Gomila

    IPC分类号： H04N7/32 ,  H04N19/124 ,  H04N19/154 ,  H04N19/61 ,  H04N19/14 ,  H04N19/176

    CPC分类号： H04N19/00157 ,  H04N19/124 ,  H04N19/14 ,  H04N19/154 ,  H04N19/176 ,  H04N19/61

    摘要： The present principles provides a method and apparatus for jointly adjusting the rounding offset and the quantization step size on a macroblock level to improve the perceptual quality of the fine details of the encoded image. In one implementation, the content of the pictures is analyzed and the smooth regions are identified. A quantization step size value for the picture is initially defined and a rounding offset is adaptively assigned to each macroblock based on the content characteristics. The quantization step size is then calculated for the a particular macroblock according to another content characteristic of the macroblock such that the encoding of the particular macroblock is performed in response to the calculated quantization step size and the rounding offset value of the first block.

    摘要翻译： 本发明提供了一种用于在宏块级别上联合调整舍入偏移量和量化步长的方法和装置，以提高编码图像的精细细节的感知质量。 在一个实现中，分析图像的内容并且识别平滑区域。 最初定义图像的量化步长值，并且基于内容特征对每个宏块自适应地分配舍入偏移。 然后根据宏块的另一内容特性，针对特定宏块计算量化步长，使得响应于计算出的量化步长和第一块的舍入偏移值执行特定宏块的编码。

    Method of encoding an image and device implementing said method
    99.
    发明授权
    Method of encoding an image and device implementing said method 失效
    实现所述方法的图像编码方法和装置

    公开(公告)号：US08452113B2

    公开(公告)日：2013-05-28

    申请号：US12448119

    申请日：2006-12-11

    申请人： Libo Yang ,  Lihua Zhu ,  Xiaoan Lu

    发明人： Libo Yang ,  Lihua Zhu ,  Xiaoan Lu

    IPC分类号： G06K9/00

    CPC分类号： H04N19/17 ,  H04N19/124 ,  H04N19/14 ,  H04N19/176 ,  H04N19/18 ,  H04N19/60

    摘要： The invention relates to a method of encoding an image divided into non-overlapping macroblocks themselves divided into non-overlapping blocks of N by N pixels into a binary stream. It comprises the steps of: —transforming each of the block into a transformed block of coefficients comprising one low frequency coefficient and N2-1 coefficients, called high frequency coefficients, of higher frequencies than the low frequency; —quantizing each coefficient of each of the transformed blocks with a quantizing parameter; —encoding the quantized coefficients into a binary stream. According to the invention, the low frequency coefficients of the transformed blocks are quantized with a same quantizing parameter, called first quantizing parameter.

    摘要翻译： 本发明涉及一种编码分割为N倍像素的非重叠块的非重叠宏块的图像的二进制流的方法。 它包括以下步骤：将每个块转换成包括一个低频系数的变换的系数块和称为高频系数的N2-1系数，频率高于低频; - 用量化参数量化每个变换块的每个系数; 将量化的系数编码为二进制流。 根据本发明，变换块的低频系数用相同的量化参数量化，称为第一量化参数。

    METHOD AND APPARATUS FOR DETECTING DARK NOISE ARTIFACTS
    100.
    发明申请
    METHOD AND APPARATUS FOR DETECTING DARK NOISE ARTIFACTS 审中-公开
    用于检测深层噪声的方法和装置

    公开(公告)号：US20110135012A1

    公开(公告)日：2011-06-09

    申请号：US12737661

    申请日：2008-08-08

    申请人： Zhen Li ,  Adeel Abbas ,  Xiaoan Lu ,  Cristina Gomila

    发明人： Zhen Li ,  Adeel Abbas ,  Xiaoan Lu ,  Cristina Gomila

    IPC分类号： H04N11/02

    CPC分类号： G06T5/002 ,  G06T7/0002 ,  G06T2207/10016 ,  G06T2207/20032 ,  H04N19/61 ,  H04N19/85

    摘要： The present invention involves detecting dark noise artifacts in coded images and video. Locations of artifacts in compressed pictures are found. A strength of the artifact per block is determined as is an overall dark noise artifact strength for each picture. Artifact detection and strength assignment is performed by analyzing candidate areas that could be prone to this type of artifact. Multiple features such as block variance, color information, luminance levels and location of the artifact could be used in this process. Also, median filtering may be used on the identified areas to eliminate isolated areas. A final artifact parameter for each picture can be assessed based on the total number of blocks that are classified as dark noise and also the strength of each macroblock.

    摘要翻译： 本发明涉及检测编码图像和视频中的暗噪声伪影。 找到压缩图片中的文物的位置。 确定每个块的伪像的强度，因为每个图像的整体暗噪声伪像强度也是如此。 通过分析可能容易受到这种类型的伪影的候选区域来执行伪像检测和强度分配。 在这个过程中可以使用诸如块方差，颜色信息，亮度水平和伪像的位置等多个特征。 此外，可以在识别的区域上使用中值滤波以消除隔离区域。 可以基于被分类为暗噪声的块的总数以及每个宏块的强度来评估每个图像的最终伪影参数。