METHOD FOR REDUCING ARBITRARY-RATIO UP-SAMPLING OPERATION USING CONTEXT OF MACROBLOCK, AND METHOD AND APPARATUS FOR ENCODING/DECODING BY USING THE SAME

摘要

A method for reducing arbitrary-ratio up-sampling operation using context of macroblock, and a method and an apparatus for encoding/decoding by using the same are provided to reduce the operation quantity of an enlargement calculation by using the information of the peripheral block in a scalable video encoding and decoding. An arbitrary macroblock is selected to successively examine a mode of each macroblock of the lower layer(S510). It is determined at least the selected macroblock or a peripheral macroblock is an intra macroblock(S520). If one of the macroblocks is the intra macrobloc, the selected macroblock is enlarged(S530). It is determined whether a mode investigation is finished for all macroblocks of the lower layer image(S540). If the adaptive enlargement process for all macroblocks is completed, the encoding of the higher layer image is performed.