Patent ID: 9635375
Date: 2017-04-25
CPC Classifications: H04N,H05K

Claim:
1. A method of decoding an encoded video, the method comprising: determining at least one coding unit by using split information extracted from a bitstream; obtaining first pattern information indicating whether residual samples of a coding unit among the at least one coding unit are equal to 0; when the first pattern information indicates the residual samples are not equal to 0, extracting from the bitstream transformation index information indicating whether a transformation unit of a current level included in the coding unit from among the at least one coding unit is split; when the transformation index information indicates a split of the transformation unit of the current level, splitting the transformation unit of the current level into square transformation units of a lower level; and when the transformation index information indicates a non-split of the transformation unit of the current level, obtaining second pattern information for the transformation unit of the current level, wherein the second pattern information indicates whether the transformation unit of the current level contains one or more transform coefficients not equal to 0, wherein a height of each of the square transformation units of the lower level is half a height of the transformation unit of the current level.