Image processing device and method

• US 9,979,981 B2
• Filed: 10/28/2016
• Issued: 05/22/2018
• Est. Priority Date: 09/30/2009
• Status: Active Grant

• Current Assignee: Sony Group Corp.
• Original Assignee: Velos Media, LLC (Inception Holdings, LLC)
• Inventors: Sato, Kazushi
• Primary Examiner(s): Abdi, Amara
• Application Number:
  US15/337,602
• Publication Number:
  US 20170048542A1
• Time in Patent Office: 571 Days
• CPC Class Codes: G06T 9/00 Image coding bandwidth or redundancy reduction for static pictures H04N1/41; coding or decoding of static colour picture signals H04N1/64; methods or arrangements for coding, decoding, compressing or decompressing digital video signals H04N19/00
• CPC Class Codes: H04N 19/105 Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
• CPC Class Codes: H04N 19/117 Filters, e.g. for pre-processing or post-processing sub-band filter banks H04N19/635
• CPC Class Codes: H04N 19/122 Selection of transform size, e.g. 8x8 or 2x4x8 DCT; Selection of sub-band transforms of varying structure or type
• CPC Class Codes: H04N 19/124 Quantisation
• CPC Class Codes: H04N 19/15 by monitoring actual compressed data size at the memory before deciding storage at the transmission buffer
• CPC Class Codes: H04N 19/159 Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
• CPC Class Codes: H04N 19/176 the region being a block, e.g. a macroblock
• CPC Class Codes: H04N 19/182 the unit being a pixel
• CPC Class Codes: H04N 19/186 the unit being a colour or a chrominance component
• CPC Class Codes: H04N 19/196 being specially adapted for the computation of encoding parameters, e.g. by averaging previously computed encoding parameters processing of motion vectors H04N19/513
• CPC Class Codes: H04N 19/51 Motion estimation or motion compensation
• CPC Class Codes: H04N 19/513 Processing of motion vectors
• CPC Class Codes: H04N 19/52 by predictive encoding
• CPC Class Codes: H04N 19/547 Motion estimation performed in a transform domain
• CPC Class Codes: H04N 19/56 Motion estimation with initialisation of the vector search, e.g. estimating a good candidate to initiate a search
• CPC Class Codes: H04N 19/70 characterised by syntax aspects related to video coding, e.g. related to compression standards

Abstract

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 mv₀, mv₁, mv₂, and mv₃, 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.

Claims

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.