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    Methods and apparatus for enhanced performance in a multi-pass video recorder
    2.
    发明申请
    Methods and apparatus for enhanced performance in a multi-pass video recorder 有权
    用于在多路视频录像机中增强性能的方法和装置

    公开(公告)号：US20090323803A1

    公开(公告)日：2009-12-31

    申请号：US12309249

    申请日：2007-06-15

    申请人： Cristina Gomila ,  Xiaoan Lu ,  Gokce Dane

    发明人： Cristina Gomila ,  Xiaoan Lu ,  Gokce Dane

    IPC分类号： H04N7/66 ,  H04N7/24 ,  H04N7/26

    CPC分类号： H04N19/86 ,  H04N19/115 ,  H04N19/117 ,  H04N19/154 ,  H04N19/156 ,  H04N19/162 ,  H04N19/172 ,  H04N19/179 ,  H04N19/192 ,  H04N19/61 ,  H04N19/82

    摘要： There are provided methods and apparatus for enhanced performance in a multi-pass video encoder. An apparatus includes a video encoder for encoding a video bitstream. The apparatus further includes a video quality analyzer, in signal communication with the encoder, for performing a video quality analysis of the video bitstream for a given encoding pass to detect encoder compression artifacts in the video bitstream, and providing to the encoder information relating to the encoder compression artifacts to enable a re-encoding setup of the encoder to reduce an occurrence of the encoder compression artifacts in subsequent re-encoding passes. At least one of the video quality analysis and the re-encoding setup are automated.

    摘要翻译： 提供了用于在多通道视频编码器中增强性能的方法和装置。 一种装置包括用于对视频比特流进行编码的视频编码器。 该装置还包括与编码器进行信号通信的视频质量分析器，用于对于给定的编码遍进行视频比特流的视频质量分析，以检测视频比特流中的编码器压缩伪像，并向编码器提供与 编码器压缩伪影以使编码器的重新编码设置能够减少随后的重新编码遍中的编码器压缩伪影的发生。 视频质量分析和重新编码设置中的至少一个是自动化的。

    BANDING ARTIFACT DETECTION IN DIGITAL VIDEO CONTENT
    5.
    发明申请
    BANDING ARTIFACT DETECTION IN DIGITAL VIDEO CONTENT 有权
    数字视频内容中的带状文字检测

    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。

    METHOD AND APPARATUS FOR AUTOMATIC VISUAL ARTIFACT ANALYSIS AND ARTIFACT REDUCTION
    6.
    发明申请
    METHOD AND APPARATUS FOR AUTOMATIC VISUAL ARTIFACT ANALYSIS AND ARTIFACT REDUCTION 有权
    用于自动视觉艺术分析和艺术减少的方法和装置

    公开(公告)号：US20110075729A1

    公开(公告)日：2011-03-31

    申请号：US12312646

    申请日：2007-12-05

    申请人： Gokce Dane ,  Wuttipong Kumwilaisak ,  Cristina Gomila

    发明人： Gokce Dane ,  Wuttipong Kumwilaisak ,  Cristina Gomila

    IPC分类号： H04N7/12

    CPC分类号： H04N19/86 ,  H04N19/124 ,  H04N19/15 ,  H04N19/154 ,  H04N19/194 ,  H04N19/61

    摘要： A system and method for correcting artifacts present in video frames is disclosed. The system includes a decision module (110) and an artifact correction unit (120). The system receives artifact metrics (112) and artifact maps (122) corresponding to artifacts present in video frames and prioritizes the video frames to be corrected by considering the type and severity of the artifacts and the content of the video frames (113). Subsequent to prioritizing the video frames, the system corrects artifacts of selected frames by adjusting compressed domain parameters (126), such as quantization parameters and mode decisions. An encoder (130) compresses the video frames according to the adjusted compressed domain parameter to automatically provide a video stream with a lower incidence and severity of artifacts.

    摘要翻译： 公开了一种用于校正视频帧中存在的伪像的系统和方法。 该系统包括判定模块（110）和伪影校正单元（120）。 该系统接收对应于视频帧中存在的伪像的伪像度量（112）和伪影图（122），并且通过考虑伪影的类型和严重性以及视频帧的内容（113）来对待修正的视频帧进行优先级排序。 在对视频帧进行优先排序之后，系统通过调整诸如量化参数和模式决定的压缩域参数（126）来校正所选帧的伪影。 编码器（130）根据经调整的压缩域参数对视频帧进行压缩，以自动提供具有较低的伪影入射和严重性的视频流。

    Detecting block artifacts in coded images and video
    7.
    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
    8.
    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。

    DETECTING BLOCK ARTIFACTS IN CODED IMAGES AND VIDEO
    9.
    发明申请
    DETECTING BLOCK ARTIFACTS IN CODED IMAGES AND VIDEO 有权
    检测编码图像和视频中的块状物品

    公开(公告)号：US20100033633A1

    公开(公告)日：2010-02-11

    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： G06K9/40 ,  H04N5/21

    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。