Method for encoding / decoding block information using quad tree, and device using method

Abstract

To provide a block information encoding / decoding method using a quad tree so as to increase encoding efficiency, and a device using the same.SOLUTION: A method for decoding transform unit information using a quad tree structure includes: a step S1200 of decoding integrated code block flag information in a transform unit; and a step S1210 of decoding a split information flag based on size information and the integrated code block flag information in the transform unit. The step S1210 includes the steps of: decoding the code block flag information in the transform unit without decoding the split information flag when transform coefficients are not present in the transform unit; and decoding the code block flag information in the transform unit when the transform unit is not additionally split, based on the split information flag.SELECTED DRAWING: Figure 12

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