Image processing device and method
The present invention relates to an image processing device and method, which realize improvement in encoding efficiency for color difference signals and reduction in address calculations for memory access. In a case where a block size of orthogonal transform is 4×4, and a macroblock of luminance signals is configured of four 4×4 pixel blocks appended with 0 through 1, the four luminance signal blocks are corresponded with one color difference signal 4×4 block appended with C. At this time, there exist four motion vector information of mv 0 , mv 1 , mv 2 , and mv 3 , as to the four luminance signal blocks. The motion vector information mv c of the one color difference signal 4×4 block is calculated by averaging processing using these four motion vector information. The present invention can be applied to an image encoding device which performed encoding based on the H.264/AVC format, for example.
1. An image processing device comprising:
circuitry configured to
assign four luma blocks of a block size including a luma component of an image to one first chroma block of the block size including first chroma component of the image and one second chroma block of the block size including second chroma component of the image which is different from the first chroma component in a format of 4:2:0 including a luma signal and a chroma signal and that the block size is 4×4.
2. The image processing device according to claim 1 , wherein
the format is a color format written as Y/Cb/Cr,
the luma component is Y,
the first chroma component is Cb, and
the second chroma component is Cr.
3. An image processing method comprising:
assigning four luma blocks of a block size including a luma component of an image to one first chroma block of the block size including first chroma component of the image and one second chroma block of the block size including second chroma component of the image which is different from the first chroma component in a format of 4:2:0 including a luma signal and a chroma signal and that block size is 4×4.
4. The image processing method according to claim 3 , wherein
the format is a color format written as Y/Cb/Cr,
the luma component is Y,
the first chroma component is Cb, and
the second chroma component is Cr.
5. A non-transitory computer-readable medium having embodied thereon a program, which when executed by a computer causes the computer to execute a method, the method comprising:
assigning four luma blocks of a block size including a luma component of an image to one first chroma block of the block size including first chroma component of the image and one second chroma block of the block size including second chroma component of the image which is different from the first chroma component in a format of 4:2:0 including a luma signal and a chroma signal and that block size is 4×4.
6. The non-transitory computer-readable medium according to claim 5 , wherein
the format is a color format written as Y/Cb/Cr,
the luma component is Y,
the first chroma component is Cb, and
the second chroma component is Cr.
7. An image processing device comprising:
an assigning unit configured to assign four luma blocks of a block size including a luma component of an image to one first chroma block of the block size including first chroma component of the image and one second chroma block of the block size including second chroma component of the image which is different from the first chroma component in a format of 4:2:0 including a luma signal and a chroma signal and that the block size is 4×4,
wherein the assigning unit is implemented via at least one processor.
8. The image processing device according to claim 7 , wherein
the format is a color format written as Y/Cb/Cr,
the luma component is Y,
the first chroma component is Cb, and
the second chroma component is Cr.