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Inter prediction mode-based image processing method and apparatus therefor

An inter-prediction, image technology, applied in image communication, digital video signal modification, electrical components, etc., can solve the problems of memory storage, memory access rate and processing power increase, and achieve the effect of reducing segmentation marks and increasing compilation efficiency.

Inactive Publication Date: 2018-04-17
LG ELECTRONICS INC
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  • Abstract
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Problems solved by technology

To process such content would result in a dramatic increase in memory storage, memory access rate and processing power

Method used

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  • Inter prediction mode-based image processing method and apparatus therefor
  • Inter prediction mode-based image processing method and apparatus therefor
  • Inter prediction mode-based image processing method and apparatus therefor

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Embodiment 1

[0136] Optical flow refers to patterns of motion, such as surfaces or edges in objects or views. That is, the motion pattern of the object is obtained by sequentially extracting the difference between images at a specific time and a previous time. In this case, more information about motion can be obtained than in the case of obtaining only the difference between the current frame and the previous frame. Optical flow plays a very important role, such as being able to obtain the target point of a moving object in the visual recognition function of animals with a sense of vision, and it is helpful for understanding the structure of the surrounding environment. Technically, optical flow can be used to analyze 3D images in computer vision systems, or it can be used for image compression. Several approaches to achieve optical flow have been proposed.

[0137] According to the existing motion compensation method using optical flow, the following equation is derived through two ass...

Embodiment 2

[0181] According to an embodiment of the invention, scaled motion vectors are derived by taking into account the distance between the current picture and two reference pictures. This will be described with reference to the figure below.

[0182] Figure 6 is a diagram illustrating a method of performing motion compensation in a pixel unit according to an embodiment of the present invention.

[0183] Figure 6 A case where the distance between the current picture (Cur Pic) 610 and the L0 reference picture (Ref0) 620 and the distance between the current picture (Cur Pic) 610 and the L1 reference picture (Ref1) 630 are different is illustrated.

[0184] Assuming that the distance (i.e. short distance) between the current picture 610 and the L0 reference picture 620 is Tb, and the distance (i.e. the long distance) between the current picture 610 and the L1 reference picture 630 is Td, the distance between the pictures ( That is, the ratio of Tb and Td) is used to scale the moti...

Embodiment 3

[0197] It is assumed that the current picture is a generalized B picture (ie, a picture to which bidirectional prediction using two reference pictures is applied), and L0 and L1 reference pictures exist temporally in the same direction based on the current picture. In this case, if there is a reference picture L1' in the opposite direction in the DPB, one of the reference blocks in the L0 and L1 reference pictures is temporally replaced by the reference block in the reference picture L1' in the opposite direction. That is, the reference block in the reference picture L1' in the opposite direction in time is generated by scaling any one of the reference blocks in the L0 and L1 reference pictures. For example, reference pictures of L0 and L1 reference pictures may be used as reference pictures in the opposite direction. This will be described with reference to the figure below.

[0198] Figure 7 is a diagram illustrating a method of performing motion compensation in a pixel u...

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Abstract

Disclosed are an inter prediction mode-based image processing method and apparatus therefor. Particularly, a method for processing an image on the basis of inter prediction may comprise the steps of:adjusting a motion vector of a current block on the basis of a ratio of a difference between a current picture's picture order count (POC) and a first reference picture's POC to a difference between the current picture's POC and a second reference picture's POC; and deriving a predictor for each pixel in the current block by applying pixel unit-based inter prediction to each pixel of the current block on the basis of the adjusted motion vector of the current block.

Description

technical field [0001] The present invention relates to a method of processing a still image or a moving image, and more particularly, to a method of encoding / decoding a still image or a moving image based on an inter prediction mode and an apparatus supporting the method. Background technique [0002] Compression coding refers to a series of signal processing techniques for sending digitized information over communication lines, or for storing information in a form suitable for storage media. Media including pictures, images, audio, and the like can be targets for compression encoding, and in particular, a technique of performing compression encoding on pictures is called video image compression. [0003] Next-generation video content is assumed to be characterized by high spatial resolution, high frame rate, and high dimensionality of scene representation. To process such content would result in a dramatic increase in memory storage, memory access rate and processing powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/107H04N19/503H04N19/176H04N19/124
CPCH04N19/503H04N19/176H04N19/513H04N19/537H04N19/573H04N19/105H04N19/159H04N19/182H04N19/109H04N19/172H04N19/107H04N19/52
Inventor 朴婡利徐廷东
Owner LG ELECTRONICS INC
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