Patent ID: 6603888
Filing Date: 2003-08-05
Classification: G06T,H03H,H04N

Abstract:
An interpolation arithmetic operating apparatus for performing an interpolation by a convolution arithmetic operation by multiplying outputs of first and second taps by first and second filter coefficients, comprising:cascade connected first and second delay means for extracting the outputs of said first and second taps; coefficient generating means for generating said first and second filter coefficients in accordance with phase information and coefficient adjustment data, first and second multiplying means for multiplying the outputs of said first and second taps by said first and second filter coefficients respectively the output of said first and second taps are outputted from between the stages of said first and second delay means by said first and second filter coefficients, respectively; adding means for adding outputs of said first and second multiplying means; and wherein an interpolation arithmetic operation output is obtained from said adding means; and wherein said first and second filter coefficient generating means can generate filter coefficients of characteristics of a nearest neighborhood approximating method to perform an interpolation by replacing nearest neighboring pixel data and filter coefficients of characteristics of a bilinear approximating method to obtain interpolation data by using a weighted mean of neighboring pixels and can generate filter coefficients of intermediate characteristics between said nearest neighborhood approximating method and said bilinear approximating method, and a ratio of the characteristics of said nearest neighborhood approximating method and a ratio of the characteristics of said bilinear approximating method can be set in accordance with said coefficient adjustment data.