Patent ID: 8369635
Filing Date: 2013-02-05
Classification: H04N

Abstract:
1. An information processing device configured to divide frequency components of image data into a plurality of frequency bands, comprising: first means for performing horizontal analysis filtering for dividing said frequency components into highband components and lowband components recursively in a horizontal direction of the image data; a first buffer that stores the frequency components output from the first means for performing horizontal analysis filtering; means for performing vertical analysis filtering on the frequency components output from the first buffer in a vertical direction of the image data; means for storing a portion of the filtered frequency components output from the means for performing vertical analysis filtering and for supplying, in sync with timing for supplying the frequency components stored in the first buffer, which are a computation result of said analysis filtering by said first means for performing horizontal analysis filtering, said data already held, which is data necessary for computation of next analysis filtering to said means for performing vertical analysis filtering; second means for performing horizontal analysis filtering for dividing frequency components output from the means for performing vertical into further highband components and lowband components; and a plurality of buffers, separate from the first buffer, that store an output from the second means for performing horizontal analysis filtering, wherein the means for performing vertical analysis filtering controls a selector connected to each of the first buffer and the plurality of buffers to read out the frequency components stored in the first buffer when a predetermined number of vertical lines have been accumulated in the first buffer and to read out data stored in at least one of the plurality of buffers when a predetermined amount of data has been accumulated in the at least one of the plurality of buffers.