Patent ID: 9544595
Date: 2017-01-10
CPC Classifications: H04N

Claim:
1. A video decoding apparatus using a quad tree structure, comprising: an entropy decoder configured to an inverse transformer configured to inversely transform the transform coefficients received from the entropy decoder, wherein the entropy decoder, after decoding the integrated code block flag information, does not decode the split information flag when the transform coefficients in the transform unit are absent, the entropy decoder determines that the transform unit is not additionally split in response to a value of the split information flag being a predefined valueθ, and decodes flag information indicating whether a Luma component in the transform unit includes a transform coefficient other than 0 into the code block flag information in response to the transform unit not being additionally split based on the split information flag, and the entropy decoder decodes the integrated code block flag when a transform depth of the transform unit is 0 and decodes the split information flag indicating whether the transform unit is additionally split when the transform depth of the transform unit is 0.