FREQUENCY CONVERSION BLOCK ENCODING APPARATUS AND IMAGE ENCODING AND DECODING METHOD USING THE SAME CAPABLE OF IMPROVING COMPRESSION EFFICIENCY OF AN IMAGE BY USING A FREQUENCY MASK TABLE

摘要

PURPOSE: A frequency conversion block encoding apparatus and image encoding and decoding method using the same are provided to encode a frequency conversion block by using a frequency mask table including non-encoding information according to a location of a frequency coefficient.;CONSTITUTION: A frequency mask unit(210) masks a quantized frequency conversion block by using a frequency mask table. A frequency scan unit(220) creates a masked frequency string by scanning the masked frequency conversion block. A mask block encoding unit(230) encodes the masked a masked frequency coefficient. A table information encoding unit(240) encodes information for a frequency mask table used for a mask of the quantized frequency conversion block.;COPYRIGHT KIPO 2012