Scalable video decoder and controlling method for the same

A scalable video decoder comprising:

• a macro block mode decision unit to determine whether a macro block mode of a macro block of an upper layer is an interlayer prediction mode when decoding a scalable video;
• an up-sampling unit to determine, when the macro block mode of the upper layer is determined as the interlayer prediction mode, an up-sampling operation is required to thereby perform texture up-sampling using information of a corresponding lower layer macro block and neighboring pixel information;
• and
• a decoding unit to decode the upper layer using the texture up-sampling,
• wherein the neighboring pixel information comprises information associated with only a subset of pixels within a macro block adjacent the corresponding lower layer macro block, and wherein said subset of pixels are immediately adjacent said corresponding lower layer macro block, wherein said subset is less than all pixels within the adjacent macro block.

A method of controlling a scalable video decoder, the method comprising:

• determining whether a macro block mode of a macro block of an upper layer is an interlayer prediction mode when decoding a scalable video;
• when the macro block mode of the upper layer is determined as the interlayer prediction mode, determining an up-sampling operation is required to thereby perform texture up-sampling using corresponding macro block information of a corresponding lower layer macro block and neighboring pixel information;
• decoding the upper layer using the texture up-sampling;
• and
• when the macro block mode of the upper layer is determined to not be the interlayer prediction mode, decoding the upper layer without applying a separate up-sampling operation,
• wherein the neighboring pixel information comprises information associated with only a subset of pixels within a macro block adjacent the corresponding lower layer macro block, and wherein said subset of pixels are immediately adjacent said corresponding lower layer macro block, wherein said subset is less than all pixels within the adjacent macro block.