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    • 44. 发明申请
    • IMPLICIT WEIGHTING OF REFERENCE PICTURES IN A VIDEO DECODER
    • 视频解码器中的参考图像的隐含加权
    • WO2004032357A1
    • 2004-04-15
    • PCT/US2003/028189
    • 2003-09-10
    • THOMSON LICENSING S.A.BOYCE, Jill, MacDonald
    • BOYCE, Jill, MacDonald
    • H04B1/66
    • H04N19/577
    • A video decoder (200), encoder (500), 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 (200) includes an implicit reference picture weighting factor unit (280) for determining a weighting factor corresponding to each reference picture index; an encoder (500) includes an implicit reference picture weighting factor assignor (572) 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.
    • 公开了一种视频解码器(200),编码器(500)以及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(200)包括用于确定与每个参考图像索引对应的加权因子的隐式参考图像加权因子单元(280) 编码器(500)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(572) 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含加权因子,检索参考图像 对于每个索引,运动补偿检索到的参考图像,并且将运动补偿参考图像乘以相应的加权。