Patent ID: 6862318
Filing Date: 2005-03-01
Classification: H04N

Abstract:
1. An image data encoding device comprising: an internal memory; a memory interface that can be connected to an external memory, said memory interface being connected to said internal memory for controlling reading/writing of data with respect to said external memory and said internal memory; and an image data encoding unit in which a sequence of plural pieces of image data are inputted, performing motion search for said image data to generate an estimation image and encoding said image data using said estimation image, wherein said image data used as a reference image in said motion search is written into said internal memory through said memory interface, said image data used as said reference image in said motion search is image data of a reconfigured image which is an estimation image previously generated and includes sub-sampled image data of said reconfigured image, full-sampled image data is written into said external memory, said motion search includes motion search with integer pixel accuracy an motion search with half-pel accuracy, said sub-sampled image data is used as a reference image in said motion search with integer pixel accuracy, and said full-sampled image data is used as a reference image in said motion search with half-pel accuracy.