Image processing device and image processing method to apply deblocking filter

Patent metadata

Field	Value
Publication number	US-10080015-B2
Application number	US-201113989091-A
Country	US
Kind code	B2
Filing date	Dec 15, 2011
Priority date	Jan 18, 2011
Publication date	Sep 18, 2018
Grant date	Sep 18, 2018

Abstract

Provided is an image processing device including a decoding section that decodes an encoded stream to generate an image, a line determining section that determines whether to apply a deblocking filter to each of lines perpendicular to a boundary in neighboring blocks neighboring across the boundary in the image generated by the decoding section, and a filtering section that applies the deblocking filter to each line to which the line determining section determines to apply the deblocking filter.

First claim

The invention claimed is:

1. An image processing device, comprising:
one or more processors configured to:
decode an encoded stream to generate an image;
determine, whether to apply a deblocking filter to a plurality of neighboring pixels that neighbor a block boundary within the image, using only a plurality of pixel values within each of only 4 lines Li of 8 lines that cross the block boundary,
wherein i=0, 3, 4, and 7; and
apply the deblocking filter to the plurality of neighboring pixels based on the determination.

2. The image processing device according to claim 1 , wherein the one or more processors are further configured to compute a first determination parameter value for the each of the only 4 lines Li of the 8 lines, based on reference pixel values of the plurality of pixel values within each of the only 4 lines Li.

3. The image processing device according to claim 2 , wherein the one or more processors are further configured to compute a second determination parameter value for remaining lines Lj of the 8 lines based on the computed first determination parameter value of each of the only 4 lines Li of the 8 lines,
wherein j=1, 2, 5, and 6, and
wherein the remaining lines Lj of the 8 lines are lines other than the only 4 lines Li.

4. The image processing device according to claim 1 , wherein the determination to apply the deblocking filter to the only 4 lines of the 8 lines further comprises comparison of a corresponding determination parameter value of the each of the only 4 lines with a threshold determination parameter value.

5. An image processing method, comprising:
decoding an encoded stream to generate an image;
determining, whether to apply a deblocking filter to a plurality of neighboring pixels that neighbor a block boundary within the image, using only a plurality of pixel values within each of only 4 lines Li of 8 lines crossing the block boundary,
wherein i=0, 3, 4, and 7; and
applying the deblocking filter to the plurality of neighboring pixels based on the determination.

6. The image processing method according to claim 5 , wherein the determination for applying of the deblocking filter to the only 4 lines of the 8 lines further comprises comparing a corresponding determination parameter value of the each of the only 4 lines with a threshold determination parameter value.

Assignees

• Ikeda Masaru
• Sony Corp

Inventors

• Ikeda Masaru

Classifications

• H04N19/176 Primary

  the region being a block, e.g. a macroblock · CPC title

• H04N19/80

  Details of filtering operations specially adapted for video compression, e.g. for pixel interpolation (H04N19/635, H04N19/86 take precedence) · CPC title

• H04N19/169

  characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding · CPC title

• H04N19/86

  involving reduction of coding artifacts, e.g. of blockiness · CPC title

• H04N19/14

  Coding unit complexity, e.g. amount of activity or edge presence estimation (H04N19/146 takes precedence) · CPC title