In-loop filtering method and apparatus using same

A video decoding method for depth information, comprising:

• generating a prediction block of a current block for the depth information;
• generating a restored block of the current block based on the prediction block;
• and
• performing filtering on the restored block,
• wherein whether or not to perform the filtering is determined based on block information about the current block and coding information about the current block.

A video decoding apparatus for depth information, comprising:

• a prediction picture generation module for generating a prediction block of a current block for the depth information;
• an addition module for generating a restored block of the current block based on the prediction block;
• and
• a filter module for performing filtering on the restored block,
• wherein the filter module comprises a boundary filtering strength determination module for determining boundary filtering strength for two neighboring blocks and a filtering application module for applying filtering to pixel values of the two neighboring blocks based on the boundary filtering strength.