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119 条记录 (耗时 0.044 秒)

    Detecting block artifacts in coded images and video
    64.
    发明授权
    Detecting block artifacts in coded images and video 有权
    检测编码图像和视频中的块伪影

    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。

    Banding artifact detection in digital video content
    66.
    发明授权
    Banding artifact detection in digital video content 有权
    数字视频内容中的伪影检测

    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。

    INTER-VIEW PREDICTION
    68.
    发明申请
    INTER-VIEW PREDICTION 审中-公开
    视角预测

    公开(公告)号：US20100142614A1

    公开(公告)日：2010-06-10

    申请号：US12451034

    申请日：2008-04-23

    申请人： Purvin Bibhas Pandit ,  Peng Yin ,  Cristina Gomila

    发明人： Purvin Bibhas Pandit ,  Peng Yin ,  Cristina Gomila

    IPC分类号： H04N7/26 ,  H04N7/24

    CPC分类号： H04N19/59 ,  H04N19/105 ,  H04N19/597 ,  H04N19/70

    摘要： At least one disclosed method and apparatus relate to inter-view prediction with different resolution reference picture. A particular method includes accessing at least a portion of an encoded picture (614), the encoded picture being from a particular view of multiple views, and the portion being encoded at a particular resolution. The method further includes determining a particular view level based on the particular view (614), determining the particular resolution based on the particular view level (606), and decoding the portion based on the particular resolution (630).

    摘要翻译： 至少一个公开的方法和装置涉及具有不同分辨率参考图片的视图间预测。 特定方法包括访问编码图像（614）的至少一部分，编码图像来自多个视图的特定视图，并且以特定分辨率编码的部分。 该方法还包括基于特定视图（614）确定特定视图级别，基于特定视图级别确定特定分辨率（606），以及基于特定分辨率对该部分进行解码（630）。

    Technique for defining concealment order to minimize error propagation
    69.
    发明申请
    Technique for defining concealment order to minimize error propagation 有权
    用于定义隐藏顺序以最小化错误传播的技术

    公开(公告)号：US20060288264A1

    公开(公告)日：2006-12-21

    申请号：US10541762

    申请日：2003-12-30

    申请人： Cristina Gomila

    发明人： Cristina Gomila

    IPC分类号： H04L1/00 ,  H03M13/00

    CPC分类号： H04N19/895

    摘要： Concealment of macroblocks in a rectangular array advantageously occurs by concealing successive rows of macroblocks by progressing in the direction of the larger side of the array. By performing concealment in this manner, information from the concealment of a preceding row or column propagates in a way that facilitates the prediction of contours either in the vertical, the horizontal or the diagonal direction horizontal/diagonal direction, thereby improving the quality of concealment.

    摘要翻译： 矩形阵列中的宏块的隐藏有利地通过在阵列的较大侧的方向上进行隐藏而连续的宏块行隐藏。 通过以这种方式执行隐藏，来自前一行或列的隐藏的信息以促进垂直，水平或对角线方向水平/对角线方向上的轮廓预测的方式传播，从而提高隐藏的质量。

    Spatial error concealment based on the intra-prediction modes transmitted in a coded stream
    70.
    发明申请
    Spatial error concealment based on the intra-prediction modes transmitted in a coded stream 审中-公开
    基于在编码流中发送的帧内预测模式的空间误差隐藏

    公开(公告)号：US20060146940A1

    公开(公告)日：2006-07-06

    申请号：US10541778

    申请日：2003-07-08

    申请人： Cristina Gomila ,  Peng Yin

    发明人： Cristina Gomila ,  Peng Yin

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

    CPC分类号： H04N19/895 ,  H04N19/11 ,  H04N19/157 ,  H04N19/176 ,  H04N19/593

    摘要： Spatial concealment of errors in an intra picture comprised of a stream of macroblocks is achieved by predicting the missing data in a macroblock based on an intra prediction mode specified in neighboring block. In practice, when macroblocks within a stream are coded by a block based coding technique, such as coding technique specified in the H.264 ISO/ITU standard, a macroblock can be predicted for coding purpose based on neighboring intra prediction modes specified by the coding technique.

    摘要翻译： 通过基于在相邻块中指定的帧内预测模式来预测宏块中的丢失数据来实现由宏块流组成的帧内图像中的错误的空间隐藏。 在实践中，当通过基于块的编码技术（例如H.264 ISO / ITU标准中规定的编码技术）对流内的宏块进行编码时，可以基于由编码指定的相邻帧内预测模式来预测宏块用于编码目的 技术。