Video encoding and decoding methods and device using same

Abstract

The present invention relates to video encoding/decoding methods and device, wherein the video encoding method according to the invention comprises the following steps: acquiring information of peripheral blocks; setting the information about a current block based on the information of the peripheral blocks; and encoding the current block based on the set information, wherein the current block and the peripheral blocks may be a CU (coding unit).

1 . A video encoding method comprising:
 obtaining information on neighboring block;   configuring information about a current block on the basis of the information about the neighboring block; and   encoding the current block on the basis of the configured information,   wherein the current block and the neighboring block are coding units (CUs).   
     
     
         2 . The method of  claim 1 , wherein the current block is a current largest coding unit (LCU) which is a coding target and the neighboring block is neighboring LCU of the current LCU,
 wherein the configuring of the information about the current block comprises selecting information to be used as information on the current LCU from among coding information about the neighboring LCUs.   
     
     
         3 . The method of  claim 2 , wherein the coding information is information on a maximum coding depth,
 wherein the configuring of the information about the current block comprises setting a maximum coding depth of the current LCU on the basis of the largest value of maximum coding depth of the neighboring LCU.   
     
     
         4 . The method of  claim 1 , wherein the current block is a upper depth CU and the neighboring block is a lower depth CU,
 wherein the configuring of the information about the current block comprises setting reference picture of the lower depth CU as reference picture of the upper depth CU when a prediction direction of the lower depth CU is equal to a prediction direction of the upper depth CU.   
     
     
         5 . The method of  claim 1 , wherein the current block is a upper depth CU and the neighboring block is lower depth CU,
 wherein the configuring of the information about the current block comprises deriving motion information on the current block based on motion information on a neighboring block having a partition size and a partition position corresponding to the current block, from among the neighboring blocks.   
     
     
         6 . A video decoding method comprising:
 obtaining information about neighboring block;   deriving information on a current block on the basis of the information about the neighboring block; and   decoding the current block on the basis of the configured information,   wherein the current block and the neighboring block are coding unit (CU)s.   
     
     
         7 . The method of  claim 6 , wherein the current block is a current LCU which is a coding target and the neighboring block is neighboring LCU of the current LCU,
 wherein the deriving of the information about the current block comprises selecting information to be used as information on the current LCU from among coding information about the neighboring LCUs.   
     
     
         8 . The method of  claim 7 , wherein the coding information is information on a maximum coding depth,
 wherein the deriving of the information on the current block comprises deriving a maximum coding depth of the current LCU on the basis of the largest value of maximum coding depth of the neighboring LCU.   
     
     
         9 . The method of  claim 6 , wherein the current block is a upper depth CU and the neighboring block is a lower depth CU,
 wherein the deriving of the information on the current block comprises setting reference picture of the lower depth CU as reference picture of the upper depth CU when a prediction direction of the lower depth CU is equal to a prediction direction of the upper depth CU.   
     
     
         10 . The method of  claim 6 , wherein the current block is a upper depth CU and the neighboring block is a lower depth CU,
 wherein the deriving of the information on the current block comprises deriving motion information on the current block based on motion information on a neighboring block having a partition size and a partition position corresponding to the current block, from among the neighboring blocks.   
     
     
         11 . A video encoder comprising:
 a predictor for predicting information on a current block;   a quantizer for quantizing the predicted information; and   an entropy encoding module for entropy-encoding the quantized information,   wherein the predictor predicts the current block on the basis of information on neighboring block of the current block, and the current block and the neighboring block are CUs.   
     
     
         12 . A video decoder comprising:
 a entropy decoding module for entropy-decoding a received bitstream;   a dequantizer for inversely quantizing the entropy-decoded information; and   a predictor for predicting a current block on the basis of the inversely quantized information,   wherein the predictor predicts the current block on the basis of information on neighboring block of the current block, and the current block and the neighboring block are CUs.