Patent ID: 6064436
Filing Date: 2000-05-16
Classification: H04N

Abstract:
An area extracting device for extracting image data, comprising:motion discriminating means for judging each of plurality of unit blocks of each of a plurality of input image frames of an image sequence as being significant based upon a difference, between a block of one frame and a corresponding block of a preceding frame, exceeding a threshold preset on the basis of an encoding rate;a specified area block map memory for storing a map of specified area unit blocks with reference to a preceding frame; anda motion area block map memory for storing motion area unit blocks, blocks judged to be significant with reference to the preceding frame by the motion discriminating means;block-map summing means for producing a logic sum of a specified area block map stored in the specified area block map memory, a preceding motion area block map stored in the motion area block map memory and a current motion area block map judged to be significant by the motion discriminating means.