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Line memory sharing method to improve image quality degradation in large vertical scaling mode in vertical scaler
Line memory sharing method to improve image quality degradation in large vertical scaling mode in vertical scaler
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机译：行存储器共享方法，可改善垂直缩放器在大型垂直缩放模式下图像质量下降的问题
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摘要
When the horizontal scaling ratio is less than 1/2 in the vertical scaling mode in the vertical scaler, the number of the line delay elements of the vertical interpolation filter for image quality improvement is doubled The present invention provides a line memory sharing method for improving picture quality deterioration occurring in a large vertical scaling mode in a vertical scaler according to the present invention is characterized in that when a horizontal scaling ratio is 1/2 or less, A line data reduction step of reducing the number of line data to be stored in a line memory part used as a line delay element to 1/2 in order to perform interpolation filtering and sequentially storing the number of line data in the line memory part; The odd-numbered clocks output data delayed by odd-numbered lines, and the even-numbered clocks output And outputting the result of the filtering by adding the stored data to the filtering data output from the even-numbered clocks, and outputting the result of the filtering by adding the stored data to the odd-numbered clocks, And a data interpolation step of replacing the invalid data located in the clock with the data obtained by horizontally interpolating the neighboring valid data so as to be valid data for all the pixels, so that the deterioration in image quality caused by the vertical reduction mode without adding the line memory Can be improved.
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