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    • 61. 发明授权
    • Implicit weighting of reference pictures in a video encoder
    • 视频编码器参考图像的隐式加权
    • US07801217B2
    • 2010-09-21
    • US10529711
    • 2003-09-10
    • Jill MacDonald Boyce
    • Jill MacDonald Boyce
    • H04B1/66
    • H04N19/577H04N19/105H04N19/176H04N19/46H04N19/573H04N19/58H04N19/61
    • A video decoder, encoder, and corresponding methods for processing video signal data for an image block with two reference picture indices to predict the image block are disclosed that utilize implicit weighting of reference pictures to enhance video compression, where a decoder includes an implicit reference picture weighting factor unit for determining a weighting factor corresponding to each reference picture index; an encoder includes an implicit reference picture weighting factor assignor for assigning a weighting factor corresponding to each reference picture index; and a method for decoding includes receiving the reference picture indices with the data that corresponds to the image block, determining an implicit weighting factor responsive to the relative positioning of the image block and the reference pictures indicated by each reference picture index, retrieving a reference picture for each index, motion compensating the retrieved reference pictures, and multiplying the motion compensated reference pictures by the corresponding weighting factor to form weighted motion compensated reference pictures.
    • 公开了一种视频解码器,编码器和用于处理具有两个参考图像索引以用于预测图像块的图像块的视频信号数据的相应方法,其利用参考图像的隐式加权来增强视频压缩,其中解码器包括隐式参考图像 加权因子单元,用于确定与每个参考图像索引对应的加权因子; 编码器包括用于分配对应于每个参考图像索引的加权因子的隐式参考图像加权因子分配器; 并且一种解码方法包括用与图像块对应的数据接收参考图像索引,响应于图像块的相对定位和由每个参考图像索引指示的参考图像来确定隐式加权因子,检索参考图像 对于每个索引,运动补偿检索到的参考图片,并且将运动补偿参考图片乘以相应的加权因子以形成加权的运动补偿参考图片。
    • 62. 发明申请
    • Method and Apparatus for Edge-Based Spatio-Temporal Filtering
    • 基于边缘时空滤波的方法与装置
    • US20100220939A1
    • 2010-09-02
    • US12223051
    • 2007-01-30
    • Alexandros TourapisJill MacDonald Boyce
    • Alexandros TourapisJill MacDonald Boyce
    • G06K9/40
    • G06T5/002G06T5/50G06T7/13G06T2207/10016G06T2207/20012G06T2207/20182H04N7/0142H04N19/577H04N19/59H04N19/615H04N19/63H04N19/80H04N19/86
    • There are provided methods and apparatus for edge-based spatio-temporal filtering. An apparatus for filtering a sequence of pictures includes a spatial filter, a motion compensator, a deblocking filter, and a temporal filter. The spatial filter is for spatially filtering a picture in the sequence and at least one reference picture selected from among previous pictures and subsequent pictures in the sequence with respect to the picture. The motion compensator, in signal communication with the spatial filter, is for forming, subsequent to spatial filtering, multiple temporal predictions for the picture from the at least one reference picture. The deblocking filter, in signal communication with the motion compensator, is for deblock filtering the multiple temporal predictions. The temporal filter, in signal communication with the deblocking filter, is for temporally filtering the multiple temporal predictions and combining the multiple temporal predictions to generate a noise reduced version of the picture.
    • 提供了基于边缘的时空滤波的方法和装置。 用于对图像序列进行滤波的装置包括空间滤波器,运动补偿器,去块滤波器和时间滤波器。 空间滤波器用于对序列中的图像进行空间滤波,并且选择相对于图像的序列中的先前图像和后续图像中的至少一个参考图像。 与空间滤波器进行信号通信的运动补偿器用于在空间滤波之后形成来自至少一个参考图片的图像的多个时间预测。 与运动补偿器进行信号通信的去块滤波器用于对多个时间预测进行去块滤波。 与去块滤波器进行信号通信的时间滤波器用于对多个时间预测进行时间滤波并组合多个时间预测以产生图像的降噪版本。
    • 67. 发明申请
    • Method and Apparatus for Detection and Concealment of Reference and Non-Reference Video Frames
    • 用于检测和隐藏参考和非参考视频帧的方法和装置
    • US20090175344A1
    • 2009-07-09
    • US11988073
    • 2006-06-06
    • Zhenyu WuFrederic LandaisPurvin Bibhas PanditJill MacDonald Boyce
    • Zhenyu WuFrederic LandaisPurvin Bibhas PanditJill MacDonald Boyce
    • H04N7/26
    • H04N19/159H04N19/577H04N19/895
    • There are provided method and apparatus for detecting and concealing reference and non-reference video frames. A video decoder includes an entropy decoder, an error detector, and an error concealer. The entropy decoder is for decompressing a video bitstream intended to have a fixed frame rate and parsing the decompressed video bitstream to find picture order counts for frames of the decompressed video bitstream. The error detector is for determining that a particular frame of the decompressed video bitstream is missing based upon the picture order counts. The error concealer is for concealing the particular frame. The method is accomplished by decompressing and parsing the video bitstream to find picture order counts for frames of the decompressed video bitstream and then determining that a particular frame of the decompressed video bitstream is missing based upon comparison of their associated picture order counts, and then concealing that particular frame.
    • 提供了用于检测和隐藏参考和非参考视频帧的方法和装置。 视频解码器包括熵解码器,误差检测器和错误遮蔽器。 熵解码器用于解压缩旨在具有固定帧速率的视频比特流,并解析解压缩的视频比特流以找到解压缩的视频比特流的帧的图像顺序计数。 误差检测器用于基于图像顺序计数来确定解压缩的视频比特流的特定帧丢失。 错误遮盖器用于隐藏特定的框架。 该方法是通过解压缩和解析视频比特流来找到解压缩的视频比特流的帧的图像顺序计数,然后基于它们相关联的图像顺序计数的比较来确定解压缩的视频比特流的特定帧丢失,然后隐藏 那个特定的框架。