Method and apparatus for encoding and decoding video by using pattern information in hierarchical data unit

  • US 10,015,520 B2
  • Filed: 03/20/2017
  • Issued: 07/03/2018
  • Est. Priority Date: 01/14/2010
  • Status: Active Grant
First Claim
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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 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.

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