Image coding apparatus and image coding method

An apparatus for coding an image, comprising:

• a first coding section configured to encode a target block by a first coding mode to generate first coded data, the target block being included in a segment into which an input image is divided;
• a second coding section configured to encode the target block by a second coding mode to generate second coded data, an amount of the second coded data being predetermined;
• a decision section configured to decide whether to encode by the first coding mode or the second coding mode;
• and
• a selection section configured to select one of the first coded data and the second coded data, based on a decision result of the decision section;
• wherein the decision section decides to encode by the second coding mode if a total amount of coded data of the segment in the input image is over a target amount of coded data, and
• the total amount of coded data being a sum of an accumulated amount of coded data obtained by encoding blocks in the segment prior to the target block, an amount of the first coded data of the target block, and an amount of coded data to be obtained by encoding remained blocks in the segment by the second coding mode.