Unlock instant, AI-driven research and patent intelligence for your innovation.

Transform-based image encoding method and apparatus therefor

An image encoding and image decoding technology, applied in the field of image encoding, can solve the problems of increased transmission cost and storage cost.

Pending Publication Date: 2022-07-15
LG ELECTRONICS INC
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when image data is transmitted using a medium such as a conventional wired / wireless broadband line or image / video data is stored using an existing storage medium, its transmission cost and storage cost increase

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Transform-based image encoding method and apparatus therefor
  • Transform-based image encoding method and apparatus therefor
  • Transform-based image encoding method and apparatus therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0236] - Limit the number of output data for forward LFNST to a maximum value of 16 → (i)

[0237] - When 4×4LFNST is applied, all areas to which 4×4LFNST is not applied are cleared → (II)-(A)

[0238] - When 8×8LFNST is applied, all areas to which 8×8LFNST is not applied are cleared → (II)-(B)

[0239] - after checking if non-zero data is also present in existing regions filled with zero values ​​and in regions filled with zeros due to additional clearing ((ii)-(A), (ii)-(B)), The LFNST index → ​​(iii) is only signaled when there is no non-zero data.

[0240] In the case of the embodiment, when LFNST is applied, the area where non-zeroed data may exist is limited to the inside of the upper left 4×4 area. In more detail, in Figure 11 of (a) and Figure 12 In the case of (a) of , the eighth position on the scan order is the last position in which non-zero data can exist. exist Figure 11 of (b) and (c) and Figure 12 In the case of (b) of , the sixteenth position in the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An image decoding method according to the present document may comprise: a step of deriving a residual sample by applying at least one of LFNST or MTS to a transform coefficient, in which whether to parse an LFNST index indicating an LFNST kernel is determined on the basis of whether a zero clearing with respect to the LFNST has been performed, whether to parse an MTS index indicating the MTS core is determined based on whether a zero clearing with respect to the MTS has been performed, the MTS index is parsed based on a color index of the current block as a luminance component, and the LFNST index is parsed irrespective of the color index of the current block.

Description

technical field [0001] The present disclosure relates to an image encoding technique, and more particularly, to a method and apparatus for encoding an image based on transformation in an image encoding system. Background technique [0002] Today, the demand for high-resolution and high-quality images / videos such as Ultra High Definition (UHD) images / videos in 4K, 8K or higher has been increasing in various fields. As image / video data becomes higher resolution and higher quality, the amount of information or bits transmitted increases compared to conventional image data. Therefore, when a medium such as a conventional wired / wireless broadband line is used to transmit image data or an existing storage medium is used to store image / video data, its transmission cost and storage cost increase. [0003] In addition, nowadays, the interest and demand for immersive media such as virtual reality (VR) and artificial reality (AR) content or holograms are increasing, and there is an in...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/60H04N19/18H04N19/70H04N19/132H04N19/186H04N19/176H04N19/122
CPCH04N19/18H04N19/60H04N19/70H04N19/186H04N19/132H04N19/176H04N19/122H04N19/119H04N19/14
Inventor 具文模林宰显金昇焕M·萨勒海法尔
Owner LG ELECTRONICS INC