Method and apparatus for video-encoding/decoding using filter information prediction

A filtering method for decoding scalable videos based on multi layers, comprising:

• processing computer executable program code embodied in computer readable storage media by a decoding processor, the computer executable program code comprising:
• program code that generates second filter information by using at least one of information included in an object layer and information included in the other layer;
• and
• program code that performs filtering on a video to be filtered by using the first filter information based on the second filter information, and
• program code that receives difference information of the first filter information and the second filter information from a coder,
• wherein the object layer is a layer including the video to be filtered, the other layer that is a layer other than the object layer is used to perform decoding at the object layer, the first filter information is information for filtering of the video to be filtered, and the second filter information is prediction filter information generated for filtering the video to be filtered, and
• wherein the performing of the video to be filtered using the first filter information based on the second filter information includes:
• generating the first filter information by summing up the second filter information and the difference information;
• and
• performing the filtering on the video to be filtered using the first filter information.

A multi-view video decoding method based on videos captured at multi views, comprising:

• generating second filter information by using at least one of information included in an object view and information included in the other view;
• performing filtering on a video to be filtered by using the first filter information based on the second filter information, and
• receiving difference information of the first filter information and the second filter information from a coder,
• wherein the object view is a view including the video to be filtered, the other view that is a view other than the object view is used to perform decoding at the object view, the first filter information is information for filtering of the video to be filtered, and the second filter information is prediction filter information generated for filtering the video to be filtered, and
• wherein the performing of the video to be filtered using the first filter information based on the second filter information includes:
• generating the first filter information by summing up the second filter information and the difference information;
• and
• performing the filtering on the video to be filtered using the first filter information.

A filtering method for decoding multi-view videos based on videos captured at multi views, comprising:

• processing computer executable program code embodied in computer readable storage media by a decoding processor, the computer executable program code comprising:
• program code that generates second filter information by using at least one of information included in an object view and information included in the other view;
• and
• program code that performs filtering on a video to be filtered by using the first filter information based on the second filter information,
• program code that receives difference information of the first filter information and the second filter information from a coder,
• wherein the object view is a view including the video to be filtered, the other view that is a view other than the object view is used to perform decoding at the object view, the first filter information is information for filtering of the video to be filtered, and the second filter information is prediction filter information generated for filtering the video to be filtered, and
• wherein the performing of the video to be filtered using the first filter information based on the second filter information includes:
• generating the first filter information by summing up the second filter information and the difference information;
• and
• performing the filtering on the video to be filtered using the first filter information.

An image decoding method performed by an image decoding apparatus, the method comprising:

• generating a prediction block by predicting an object block;
• decoding a transform block for the object block;
• generating a residual block by inversely transforming the decoded transform block;
• reconstructing the object block by adding the residual block and the prediction block;
• and
• filtering a reconstructed image including the reconstructed object block,
• wherein the filtering comprises a deblocking filtering and a sample adaptive offset (SAO)filtering;
• wherein, in performing the deblocking filtering, a filter type is determined based on a neighboring pixel value of a boundary to be filtered, and the deblocking filtering is performed on the boundary to be filtered according to the determined filter type.

An image encoding method performed by an image encoding apparatus, the method comprising:

• generating a prediction block by predicting an object block;
• generating a residual block for the object block based on the object block and the prediction block;
• generating a transform block by transforming the residual block;
• reconstructing the object block based on the transform block and the prediction block;
• and
• filtering a reconstructed image including the reconstructed object block,
• wherein the filtering comprises a deblocking filtering and a sample adaptive offset (SAO) filtering;
• wherein, in performing the deblocking filtering, a filter type is determined based on a neighboring pixel value of a boundary to be filtered, and the deblocking filtering is performed on the boundary to be filtered according to the determined filter type.

A non-transitory computer-readable medium storing a bitstream that is generated by an image encoding method, the method comprising:

• generating a prediction block by predicting an object block;
• generating a residual block for the object block based on the object block and the prediction block;
• generating a transform block by transforming the residual block;
• reconstructing the object block based on the transform block and the prediction block;
• and
• filtering a reconstructed image including the reconstructed object block,
• wherein the filtering comprises a deblocking filtering and a sample adaptive offset (SAO) filtering;
• wherein, in performing the deblocking filtering, a filter type is determined based on a neighboring pixel value of a boundary to be filtered, and the deblocking filtering is performed on the boundary to be filtered according to the determined filter type.