Invention Grant
US07974346B2 System and method for generating video data for implicit coefficient prediction decoding 有权
用于生成隐式系数预测解码的视频数据的系统和方法

System and method for generating video data for implicit coefficient prediction decoding
Abstract:
A predictive video coder performs gradient prediction based on previous blocks of image data. For a new block of image data, the prediction determines a horizontal gradient and a vertical gradient from a block diagonally above the new block (vertically above a previous horizontally adjacent block). Based on these gradients, the encoder predicts image information based on image information of either the horizontally adjacent block or a block vertically adjacent to the new block. The encoder determines a residual that is transmitted in an output bitstream. The decoder performs the identical gradient prediction and predicts image information without need for overhead information. The decoder computes the actual information based on the predicted information and the residual from the bitstream.
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