IMAGE-PROCESSING UNIT

摘要

PROBLEM TO BE SOLVED: To reduce the capacity of an interlace conversion memory for an MPEG decoder to reproduce dynamic image data. SOLUTION: A processing unit is provided with a frame memory 11 that is provided with five fields each consisting of N sets of slots and with three additional slots. Each slot has a capacity for storing 8 lines worth of image. Four fields among the five fields store a reference frame for motion compensation. The remaining one field and the three additional slots are used for interlace transformation of B picture. A control section 14 is provided with a slot management memory, a write in slot pointer and a readout slot pointer, and the content of the slot management memory is updated in the case of writing in to the frame memory 11 by a bit stream analysis section 12, so that the image output section 13 readouts the frame memory 11 in a correct slot order.