Patent ID: 6237012
Filing Date: 2001-05-22
Classification: G06F

Abstract:
An orthogonal transform apparatus comprising:orthogonal transform means for performing n-dimensional s-order (n and s are natural numbers) orthogonal transform, modified-information control means for performing control in accordance with modified information for outputting n-dimensional m-order data as n-dimensional p-order data (m and p are natural numbers), and rearrangement means for performing the following in accordance with the control by said modified-information control means:(1) m-p data values from the high-order side out of m-order input data values are set to 0 when m is equal to s and m is larger than p, p-m data values are added to the high-order side among m-order input data values to rearrange the data values when m is smaller than p, or data values are left as they are when m is equal to p;(2) the data values in said Item (1) are rearranged after discarding m-s data values from the high-order side of said m-order input data values before rearranging the data values in said Item (1) when m is larger than s; and(3) the data values in said Item (1) are rearranged after adding s-m 0 data values to the high-order side of said m-order input data values before rearranging the data values in said Item (1) when m is smaller than s; whereinsaid orthogonal transform means performs orthogonal transform for the n-dimensional s-order data values rearranged by said rearrangement means.