Patent ID: 7630439
Filing Date: 2009-12-08
Classification: G06T,H04N

Abstract:
1. An apparatus for converting conversion encoding coefficients which is converted by orthogonal into conversion encoding coefficients having different size, using sampling/resolution conversion, comprising; inputting means for inputting conversion encoding coefficients converted by the orthogonal conversion, conversion matrix integration means for integrating sample conversion matrixes comprised of an enlarging matrix in the horizontal direction (Lw), a scale down matrix in the horizontal direction (Mw), and a conversion matrix in the vertical direction (Mh) required for sampling mode conversion and resolution conversion matrixes comprised of conversion matrixes in the vertical and horizontal direction (Nh, Nw) required for resolution conversion, thereby a first conversion matrix applied from right side of a matrix _(U)_ and a second conversion matrix applied from left side of the matrix _(U)_ are formed, the matrix _(U)_ being made of the conversion encoding coefficients from the inputting means, and converting means for simultaneously carrying out the sampling conversion and the resolution conversion using the matrix _(U)_ of the conversion encoding coefficients input from the inputting means and the first and second conversion matrix obtained from the conversion matrix integration means, wherein a product of the matrixes (Lw) and (Mw) of the sampling conversion matrixes and the matrix (Nw) of the resolution conversion matrix is determined to become a unit matrix (E) in order that the first conversion matrix applied from right side of the matrix (U) becomes the unit matrix.