Patent ID: 6697528
Filing Date: 2004-02-24
Classification: H04N

Abstract:
An image synthesis system for combining main image data that has been compressed by an MPEG method and subordinate image data that has been compressed by a method different from the MPEG method, the system comprising:motion compensation processor decompressing, on a per-macroblock basis, I-, P- and B-pictures of the main image data, which has first been subjected to inverse quantization and inverse DCT processing; a macroblock storage unit storing a macroblock of the I-picture of the main image data; and a subordinate-image macroblock generator converting the subordinate image data to an MPEG macroblock, translucently combining data of a macroblock having a portion which overlaps the subordinate image and data of a macroblock that has been stored in said macroblock storage unit, and creating data of the translucently combined macroblocks as a macroblock of the B-picture, which is decompressed by said motion compensation processor.