IMAGE ENCODING APPARATUS AND METHOD, AND IMAGE ENCODING PROGRAM

摘要

An image encoding method that encodes an image so as to optimize estimated values of processing units which are a coding unit, a prediction unit, and a transform unit by selecting sizes of the individual processing units. The method includes a division step that divides an image having a size of the coding unit into a plurality of blocks; an activity computation step that computes activities pertaining to the individual blocks; and a transform unit size determination step that determines, based on the computed activities, a size pattern of the transform unit within the image having the size of the coding unit.

主权项

1. An image encoding apparatus that encodes an image so as to optimize estimated values of processing units which are a coding unit, a prediction unit, and a transform unit by selecting sizes of the individual processing units, the apparatus comprising:
a division device that divides an image having a size of the coding unit into a plurality of blocks; an activity computation device that computes activities pertaining to the individual blocks; and a transform unit size determination device that determines, based on the computed activities, a size pattern of the transform unit within the image having the size of the coding unit, wherein the transform unit size determination device sets the size of the transform unit within the coding unit to any one of a plurality of sizes by comparing a difference in the activity between any adjacent blocks among the plurality of the blocks with a predetermined threshold for one or more thresholds.