Method and apparatus for video encoding using inter layer prediction with pre-filtering, and method and apparatus for video decoding using inter layer prediction with post-filtering

A method of video decoding for decoding an image synthesized from at least one image, the method comprising:

• restoring first components of the at least one image by decoding a received base layer bitstream;
• restoring second components, different from the first components, of the at least one image by decoding a received enhancement layer bitstream and referring to the restored first components;
• and
• post-filtering the restored second components using a correlation between the first components and the second components.

A video encoding device for encoding an image synthesized from at least one image, the device comprising:

• a layer component classifying unit configured to classify components of the at least one image into first components and second components, different from the first components;
• a base layer encoding unit configured to generate a base layer bitstream by encoding the first components of the at least one image;
• a pre-filtering unit configured to perform pre-filtering on the second components of the at least one image using a correlation between the first components and the second components;
• and
• an enhancement layer encoding unit configured to generate an enhancement layer bitstream by encoding the pre-filtered second components with reference to the first components, and

A video decoding device for decoding an image synthesized from at least one image, the device comprising:

• a base layer decoding unit configured to decode a received base layer bitstream and restore first components of the at least one image;
• an enhancement layer decoding unit configured to decode a received enhancement layer bitstream and restore second components, different from the first components, of the at least one image by referring to the restored first components;
• a post-filtering unit configured to perform post-filtering to the restored second components using a correlation between the first components and the second components;
• and
• an image restoring unit configured to restore the at least one image using the restored first components and the post-filtered second components.