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Invention Publication
CN105556974A 基于调色板的视频译码中的调色板预测 有权

基于调色板的视频译码中的调色板预测
Abstract:
在基于调色板的译码中，视频译码器可形成所谓的“调色板”，作为表示给定块的视频数据的色彩的表。所述视频译码器可为当前视频数据块的一或多个像素值译码索引值，其中所述索引值指示所述调色板中表示所述当前块的所述像素值的条目。根据所述技术，一种视频译码器确定预测性调色板中复制到当前调色板的一或多个调色板条目，以及不在所述预测性调色板中但包含于所述当前调色板中的新调色板条目的数目。所述视频译码器将所述当前调色板的大小计算为等于所述复制的调色板条目的数目与所述新调色板条目的数目的和，且产生包含所述复制的调色板条目和所述新调色板条目的所述当前调色板。
Abstract(English):

The invention relates to palette prediction in palette-based video coding. In palette-based coding, a video coder may form a so-called "palette" as a table of colors representing the video data of a given block. The video coder may code index values for one or more pixels values of a current block of video data, where the index values indicate entries in the palette that represent the pixel values of the current block. According to the techniques, a video coder determines one or more palette entries in a predictive palette that are copied to the current palette, and a number of new palette entries not in the predictive palette that are included in the current palette. The video coder calculates a size of the current palette equal to the sum of the number of the copied palette entries and the number of the new palette entries, and generates the current palette including the copied palette entries and the new palette entries.

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