公开(公告)号：US20100232498A1

公开(公告)日：2010-09-16

申请号：US12733947

申请日：2008-09-15

申请人： Yali Liu ,  Xiaoan Lu ,  Cristina Gomila ,  Qian Xu

发明人： Yali Liu ,  Xiaoan Lu ,  Cristina Gomila ,  Qian Xu

IPC分类号： H04N7/26

CPC分类号： H04N19/198 ,  H04N19/126 ,  H04N19/149 ,  H04N19/152 ,  H04N19/192 ,  H04N19/196 ,  H04N19/61

摘要： Methods and apparatus are provided for rate control accuracy in video encoding and decoding. An apparatus includes a video encoder for encoding image data using rate control. The rate control involves estimating a quantization step size and adjusting a rounding offset. The rounding offset is capable of being non-constant during the encoding.

摘要翻译： 提供了视频编码和解码中的速率控制精度的方法和装置。 一种装置包括用于使用速率控制对图像数据进行编码的视频编码器。 速率控制涉及估计量化步长并调整舍入偏移。 舍入偏移在编码期间能够不变。

公开(公告)号：US20100066912A1

公开(公告)日：2010-03-18

申请号：US12448184

申请日：2007-12-19

申请人： Wuttipong Kumwilaisak ,  Gokce Dane ,  Cristina Gomila

发明人： Wuttipong Kumwilaisak ,  Gokce Dane ,  Cristina Gomila

IPC分类号： H04N5/217 ,  H04N7/12

CPC分类号： H04N19/86 ,  G06T7/44 ,  H04N19/154 ,  H04N19/17

摘要： A method and system for identifying and determining banding artifacts in digital video content composed of a sequence of moving video pictures includes creating a mask image corresponding to a picture from said sequence of moving video pictures based on global gradient changes to detect potential areas containing banding artifacts. The values of the mask image are scaled thereby making banding artifact detection possible using gradient operators. The banding artifacts are then identified/detected based on the local gradients.

摘要翻译： 用于识别和确定由运动视频图像序列组成的数字视频内容中的条带伪影的方法和系统包括基于全局梯度变化从所述运动视频图像序列创建与图像相对应的掩模图像，以检测包含条带伪影的潜在区域 。 掩模图像的值被缩放，从而可以使用梯度算子来进行带状伪影检测。 然后基于局部梯度来识别/检测带状伪影。

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。

公开(公告)号：US20070104380A1

公开(公告)日：2007-05-10

申请号：US10556833

申请日：2004-03-30

申请人： Cristina Gomila ,  Alexander Kobilansky

发明人： Cristina Gomila ,  Alexander Kobilansky

IPC分类号： G06K9/36 ,  G06K9/40

CPC分类号： H04N19/136 ,  H04N19/117 ,  H04N19/46 ,  H04N19/61

摘要： To characterize film grain, a Film Grain Characterizer (23) receives an incoming information stream (12) and a filtered information stream (24) from which the film grain has been removed. From these streams, the Film Grain Characterizer (23) outputs a message that contains an identity of a model for simulating grain, as well at least one of a set of several parameters, including correlation parameters, intensity-independent parameters and intensity-dependent parameters used by the identified model. An encoder (26, 13) encodes the film grain information for subsequent transmission.

摘要翻译： 为了表征胶片颗粒，胶片颗粒表征器（23）接收输入信息流（12）和已经去除胶片颗粒的滤波信息流（24）。 从这些流中，胶片颗粒表征器（23）输出包含用于模拟纹理的模型的标识的消息，以及包括相关参数，强度无关参数和强度相关参数的几个参数的集合中的至少一个 被识别的模型使用。 编码器（26,13）对胶片颗粒信息进行编码，用于随后的传输。

公开(公告)号：US20060256873A1

公开(公告)日：2006-11-16

申请号：US10556834

申请日：2004-03-30

申请人： Cristina Gomila ,  Alexander Kobilansky

发明人： Cristina Gomila ,  Alexander Kobilansky

IPC分类号： H04B1/66 ,  H04N11/02 ,  H04N11/04 ,  H04N7/12

CPC分类号： G06T5/002 ,  G06T5/10 ,  G06T9/00 ,  G06T2207/10016 ,  G06T2207/10024 ,  G06T2207/20056 ,  G06T2207/20204 ,  H04N5/262 ,  H04N19/61 ,  H04N19/85

摘要： To simulate film grain in a compressed video signal, a decoder (15, 28) receives a message containing information that contains a set of one or more parameters, each specifying certain attribute associated with the film grain. For example, one of the parameters will specify the model used to simulate the film grain, whereas other parameters each specify a particular factor associated with that model. Upon receipt of the message, the decoder selects the model, and simulates the film grain for addition to the video signal following decompression.

摘要翻译： 为了模拟压缩视频信号中的胶片颗粒，解码器（15,28）接收包含包含一组或多个参数的信息的消息，每个参数指定与胶片颗粒相关联的某些属性。 例如，其中一个参数将指定用于模拟胶片颗粒的模型，而其他参数均指定与该模型相关联的特定因子。 在接收到消息后，解码器选择该模型，并且在解压缩之后模拟用于添加到视频信号的胶片颗粒。

公开(公告)号：US07012958B2

公开(公告)日：2006-03-14

申请号：US10434802

申请日：2003-05-09

申请人： Ferran Marques ,  Cristina Gomila ,  Antoni Gasull

发明人： Ferran Marques ,  Cristina Gomila ,  Antoni Gasull

IPC分类号： H04B1/66

CPC分类号： G06T9/001 ,  G06T9/20

摘要： The invention relates to a method of coding segmented pictures, or partitions, divided into homogeneous regions. Said method, called intra-mode coding process, comprises, for each successive partition, the steps of translating the picture of the labels associated to the regions into a description in terms of a contour element chain in which the elements are defined by means of their movements through successive basic cells, tracking inside each successive cell each contour from its initial contour point, previously extracted, to its end by storing chain symbols corresponding both to input, internal and output contour elements of said cell and to priorities between possible multiple outputs elements, and repeating these steps up to the end of each successive contour segment of the concerned partition. The information corresponding in each cell to the initial point of each contour segment and to the associated chain of movements between that initial point and the initial one of the following cell is finally coded.

公开(公告)号：US09516328B2

公开(公告)日：2016-12-06

申请号：US12735441

申请日：2009-01-15

申请人： Yali Liu ,  Qian Xu ,  Xiaoan Lu ,  Cristina Gomila

发明人： Yali Liu ,  Qian Xu ,  Xiaoan Lu ,  Cristina Gomila

IPC分类号： H04N7/26 ,  H04N19/192 ,  H04N19/176 ,  H04N19/172 ,  H04N19/149 ,  H04N19/61 ,  H04N19/124

CPC分类号： H04N19/192 ,  H04N19/124 ,  H04N19/149 ,  H04N19/172 ,  H04N19/176 ,  H04N19/61

摘要： A method and apparatus are provided for rate control accuracy in video encoding. The apparatus includes a video encoder for encoding image data in a single encoding pass using rate control. The rate control involves defining a quantization step size value and a rounding offset value and refining at least the rounding offset value. The image data is encoded responsive to the quantization step size value and the refined rounding offset value.

摘要翻译： 提供了一种用于视频编码中的速率控制精度的方法和装置。 该装置包括用于使用速率控制在单个编码通道中对图像数据进行编码的视频编码器。 速率控制涉及定义量化步长值和舍入偏移值，并且至少精炼舍入偏移值。 响应于量化步长值和精化舍入偏移值来编码图像数据。

公开(公告)号：US08902977B2

公开(公告)日：2014-12-02

申请号：US12087197

申请日：2007-01-04

申请人： Jae Hoon Kim ,  Yeping Su ,  Cristina Gomila

发明人： Jae Hoon Kim ,  Yeping Su ,  Cristina Gomila

IPC分类号： H04N7/12 ,  H04N19/186 ,  H04N19/196 ,  H04N19/46 ,  H04N13/00 ,  H04N19/50 ,  H04N19/176 ,  H04N19/597 ,  H04N19/70 ,  H04N19/109 ,  H04N19/463 ,  H04N19/10 ,  H04N19/82

CPC分类号： H04N19/136 ,  H04N13/15 ,  H04N19/10 ,  H04N19/109 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/186 ,  H04N19/196 ,  H04N19/46 ,  H04N19/463 ,  H04N19/50 ,  H04N19/507 ,  H04N19/593 ,  H04N19/597 ,  H04N19/70 ,  H04N19/82

摘要： There are provided a method and apparatus for illumination and color compensation for multi-view video coding. A video encoder includes an encoder for encoding a picture by enabling color compensation of at least one color component in a prediction of the picture based upon a correlation factor relating to color data between the picture and another picture. The picture and the other picture have different view points and both corresponding to multi-view content for a same or similar scene.

摘要翻译： 提供了用于多视点视频编码的照明和颜色补偿的方法和装置。 视频编码器包括：编码器，用于根据与图像和另一图像之间的颜色数据相关的相关因子，通过在图像的预测中实现至少一种颜色分量的颜色补偿来对图像进行编码。 图像和其他图像具有不同的视点，并且对应于相同或相似场景的多视图内容。

公开(公告)号：US08879001B2

公开(公告)日：2014-11-04

申请号：US12448636

申请日：2007-12-21

申请人： Gokce Dane ,  Cristina Gomila

发明人： Gokce Dane ,  Cristina Gomila

IPC分类号： H04N11/02 ,  H04N19/48 ,  H04N19/86 ,  H04N19/154 ,  H04N19/119 ,  H04N19/18 ,  H04N19/176 ,  H04N19/182

CPC分类号： H04N19/119 ,  H04N19/154 ,  H04N19/176 ,  H04N19/18 ,  H04N19/182 ,  H04N19/48 ,  H04N19/86 ,  H04N19/865

摘要： A method is provided for block artifact detection and block artifact determination using multiple features in coded images and video. A method includes identifying a plurality of overlapping blocks in a picture with respect to a current block. Each of the plurality of overlapping blocks covers a portion of the current block and a portion of an adjacent block. The method further includes transforming at least one of the plurality of overlapping blocks into respective coefficients corresponding to at least one of a luminance component and a chrominance component. The method also includes identifying a block artifact for the at least one of the plurality of overlapping blocks when coefficients corresponding to the at least one of the plurality of overlapping blocks are larger than a predefined value.

摘要翻译： 提供了一种用于块伪影检测和使用编码图像和视频中的多个特征的块伪像确定的方法。 一种方法包括相对于当前块识别图片中的多个重叠块。 多个重叠块中的每一个覆盖当前块的一部分和相邻块的一部分。 该方法还包括将多个重叠块中的至少一个重新变换成对应于亮度分量和色度分量中的至少一个的相应系数。 当与多个重叠块中的至少一个重叠块相对应的系数大于预定值时，该方法还包括识别多个重叠块中的至少一个的块伪像。

公开(公告)号：US08532198B2

公开(公告)日：2013-09-10

申请号：US12448184

申请日：2007-12-19

申请人： Wuttipong Kumwilaisak ,  Gokce Dane ,  Cristina Gomila

发明人： Wuttipong Kumwilaisak ,  Gokce Dane ,  Cristina Gomila

IPC分类号： H04N7/12 ,  H04N11/02 ,  H04N11/04

CPC分类号： H04N19/86 ,  G06T7/44 ,  H04N19/154 ,  H04N19/17

摘要： A method and system for identifying and determining banding artifacts in digital video content composed of a sequence of moving video pictures includes creating a mask image corresponding to a picture from said sequence of moving video pictures based on global gradient changes to detect potential areas containing banding artifacts. The values of the mask image are scaled thereby making banding artifact detection possible using gradient operators. The banding artifacts are then identified/detected based on the local gradients.

摘要翻译： 用于识别和确定由运动视频图像序列组成的数字视频内容中的条带伪影的方法和系统包括基于全局梯度变化从所述运动视频图像序列创建与图像相对应的掩模图像，以检测包含条带伪影的潜在区域 。 掩模图像的值被缩放，从而可以使用梯度算子来进行带状伪影检测。 然后基于局部梯度来识别/检测带状伪影。