Deblocking control method considering intra BL mode and multilayer video encoder/decoder using the same

A method for performing a deblocking filtering of a frame comprising a plurality of blocks of a present layer, the method comprising:

• (a) choosing a present block on which a deblocking filtering will be performed and a neighboring block from the plurality of blocks;
• (b) determining whether the present block and the neighboring block are coded by an intra base layer (BL) coding, under control of the processor;
• (c) deciding a deblocking filter strength according to a result of the determining;
• and
• (d) performing the deblocking filtering with respect to a boundary between the present block and the neighboring block according to the deblocking filter strength,
• wherein, in the intra BL coding, the present block of the present layer is predicted using a lower layer of the present layer.

A video encoding method based on a multilayer using a deblocking filtering, the method comprising:

• (a) encoding an input video frame;
• (b) decoding the encoded frame;
• (c) deciding a deblocking filter strength by determining whether at least one of a present block and a neighboring block included in the decoded frame of a present layer is coded by an intra coding, and, if at least one of the two block is coded by the intra coding, then determining whether the two blocks are coded by an intra base layer (BL) coding;
• and
• (d) performing the deblocking filtering with respect to a boundary between the two blocks according to the chosen deblocking filter strength,
• wherein, in the intra BL coding, the present block of the present layer is predicted using a lower layer of the present layer.

A video decoding method based on a multilayer using deblocking filtering, the method comprising:

• (a) restoring a video frame from an input bit stream;
• (b) choosing a deblocking filter strength by determining whether at least one of a present block and a neighboring block constituting the restored frame of a present layer is coded by an intra coding, and, if at least one of the two blocks is coded by the intra coding, then determining whether the two blocks are coded by an intra base layer (BL) coding;
• and
• (c) performing the deblocking filtering with respect to a boundary between the two blocks according to the chosen deblocking filter strength.

A video encoder based on a multilayer using deblocking filtering, the video encoder comprising:

• means for encoding an input video frame;
• means for decoding the encoded frame;
• means for choosing a deblocking filter strength by determining whether at least one of a present block and a neighboring block included in the decoded frame of a present layer is coded by an intra coding, and, if at least one of the two blocks is coded by the intra coding, then determining whether the two blocks are coded by an intra base layer (BL) coding;
• and
• means for performing the deblocking filtering with respect to a boundary between the two blocks according to the chosen deblocking filter strength,
• wherein, in the intra BL coding, the present block of the present layer is predicted using a lower layer of the present layer.

A video decoder based on a multilayer using deblocking filtering, the video decoder comprising:

• means for restoring a video frame from an input bit stream;
• means for deciding a deblocking filter strength by determining whether at least one of a present block and a neighboring block included in the decoded frame of a present layer is coded by an intra coding, and, if at least one of the two blocks is coded by the intra coding, then determining whether the two blocks are coded by an intra base layer (BL) coding;
• and
• means for performing the deblocking filtering with respect to a boundary between the two blocks according to the chosen deblocking filter strength,
• wherein, in the intra BL coding, the present block of the present layer is predicted using a lower layer of the present layer.

A non-transitory computer-readable recording medium including a program code that can be executed by a computer in order to perform a video encoding method which comprises:

• (a) encoding an input video frame;
• (b) decoding the encoded frame;
• (c) deciding a deblocking filter strength according to whether a present block and a neighboring block included in the decoded frame of a present layer are coded by an intra base layer (BL) coding;
• and
• (d) performing the deblocking filtering with respect to a boundary between the present block and the neighboring block according to the chosen deblocking filter strength,
• wherein, in the intra BL coding, the present block of the present layer is predicted using a lower layer of the present layer.

A non-statutory computer-readable recording medium including a program code that can be executed by a computer in order to perform a video decoding method which comprises:

• (a) restoring a video frame from an input bit stream;
• (b) choosing a deblocking filter strength according to whether a present block and a neighboring block included in the decoded frame of a present layer are coded by an intra base layer (BL) coding;
• and
• (c) performing the deblocking filtering with respect to a boundary between the present block and the neighboring block according to the chosen deblocking filter strength,
• wherein, in the intra BL coding, the present block of the present layer is predicted using a lower layer of the present layer.