Method and apparatus for encoding of video using depth information
A method of encoding an image using a depth information includes: extracting a depth value distribution information of a current largest coding unit (LCU); predicting a plurality of division structure candidates of the LCU based on the depth value distribution information; and determining an optimum division structure among the plurality of division structure candidates of the LCU based on at least one of coding efficiency and image quality.
1. A method of encoding an image using a depth information, comprising:
extracting a depth value distribution information of a current largest coding unit (LCU);
predicting an object structure of a coding unit (CU) included in the LCU based on depth value distribution information of the CU; and
determining an optimum division structure among a plurality of division structure candidates of the LCU by omitting a part of rate-distortion cost calculations based on prediction of the object structure of the CU,
wherein when the object structure of the CU is predicted to be formed of a single object, a rate-distortion cost calculation for an asymmetric motion partitioning (AMP) of the CU is omitted at determining the optimum division structure.
2. The method of claim 1 , wherein when the object structure of the CU is predicted as an up-and-down division structure, a calculation relating to a right-and-left division among rate-distortion cost calculations for an asymmetric motion partitioning (AMP) of the CU is omitted at determining the optimum division structure.
3. The method of claim 1 , wherein when the object structure of the CU is predicted as a right-and-left division structure, a calculation relating to an up-and-down division among rate-distortion cost calculations for an asymmetric motion partitioning (AMP) of the CU is omitted at determining the optimum division structure.
4. An apparatus of encoding an image using a depth information, comprising:
a depth value extraction portion configured to extract a depth value distribution information of a current largest coding unit (LCU) from a depth image;
a division structure prediction portion configured to predict an object structure of a coding unit (CU) included in the LCU based on depth value distribution information of the CU; and
an optimum division structure determination portion configured to determine an optimum division structure among a plurality of division structure candidates of the LCU by omitting a part of rate-distortion cost calculations based on prediction of the object structure of the CU,
wherein when the object structure of the CU is predicted to be formed of a single object, a rate-distortion cost calculation for an asymmetric motion partitioning (AMP) of the CU is omitted at determining the optimum: division structure.