Method and apparatus for encoding video using variable partitions for predictive encoding, and method and apparatus for decoding video using variable partitions for predictive encoding
A video encoding method and apparatus and a video decoding method and apparatus are provided. The video encoding method includes: prediction encoding in units of a coding unit as a data unit for encoding a picture, by using partitions determined based on a first partition mode and a partition level, so as to select a partition for outputting an encoding result from among the determined partitions; and encoding and outputting partition information representing a first partition mode and a partition level of the selected partition. The first partition mode represents a shape and directionality of a partition as a data unit for performing the prediction encoding on the coding unit, and the partition level represents a degree to which the coding unit is split into partitions for detailed motion prediction.
1. A method of decoding video, the method comprising:
receiving a bitstream including data of a picture, information about a size of a maximum coding unit, and split information;
splitting the picture into a plurality of maximum coding units, including the maximum coding unit, using the information about the size of the maximum coding unit;
hierarchically splitting a maximum coding unit among the plurality of maximum coding units into a plurality of coding units based on the split information, wherein the split information indicates whether a coding unit of depth k, where k is integer, is split into coding units of depth k+1;
determining one or more prediction units in a coding unit among the plurality coding units using partition type information, performing prediction on a prediction unit among the one or more prediction units in the coding unit; and
generating a reconstructed coding unit based on the prediction,
wherein the partition type information indicates one of a symmetric type and an asymmetric type when a size of the coding unit is larger than a predetermined size.
2. A method of encoding video, the method comprising:
splitting a picture into a plurality of maximum coding units including a maximum coding unit;
splitting a maximum coding unit among the plurality of maximum coding units into a plurality of coding units;
determining one or more prediction units in a coding unit among the one more coding units;
performing prediction on a prediction unit among the plurality of prediction units in the coding; and
generating a bitstream including data of the picture, information about a size of the maximum coding unit, partition type information of the coding unit, and split information of the coding unit,
wherein the partition type information indicates one of a symmetric type and an asymmetric type when a size of the coding unit is larger than a predetermined size.
3. A non-transitory computer-readable medium for storing data associated with a video, comprising a bitstream stored in the non-transitory computer readable medium, the bitstream including:
split information of a coding unit for hierarchically splitting a maximum coding unit among a plurality of maximum coding units into one of more coding units,
information about a size of a maximum coding unit for splitting a picture into the plurality of maximum coding units including the maximum coding unit,
partition type information of the coding unit,
wherein the partition type information indicates one of a symmetric type and an asymmetric type when a size of the coding unit is larger than a predetermined size.