| 摘要 |
An image data processor comprising a matrix operating circuit (82) for multiplying a matrix representing data by a matrix representing transformation constants in an image data normalizer for normalizing image data or inverse normalizing coded image data, said image data processor comprising first latching means (210) for sequentially latching data in a selected column of said matrix representing data; second latching means (211-1 ... 211-x) for sequentially latching the transformation constants in a row matrix corresponding to the data which is latched by said first latching means; multiplying means (212-1 ... 212-x) provided in correspondence with said second latching means (211-1 ... 211-x) for multiplying the transformation constants latched by said second latching means by the data latched by said first latching means (210); adding means (213-1 ... 213-x), provided in correspondence with said multiplying means (212-1 ... 212-x), for accumulating the products produced by said multiplying means as a sum; and third latching means (214-1 ... 213-x), provided in correspondence with said adding means (213-1 ... 213-x), for latching the sum accumulated by said adding means, and for supplying the sum previously accumulated to said adding means and for receiving an updated accumulated sum from said adding means. <IMAGE> |
