Video encoding / decoding method and apparatus, and recording medium storing a bitstream.
By using a non-separable linear transformation kernel based on coding parameters, the method addresses inefficiencies in encoding and decoding high-resolution images, enhancing transformation performance and encoding efficiency.
JP2026521765APending Publication Date: 2026-07-01LG ELECTRONICS INC
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- LG ELECTRONICS INC
- Filing Date
- 2024-06-19
- Publication Date
- 2026-07-01
AI Technical Summary
Technical Problem
Existing image compression technologies face challenges in efficiently encoding and decoding high-resolution, high-quality images due to limitations in transformation methods, particularly in handling block sizes and transformation kernels.
Method used
The method employs a non-separable linear transformation kernel based on coding parameters, allowing for unseparated and separated transformations tailored to different block sizes, and includes a computer-readable digital storage medium for encoding and decoding high-quality images.
Benefits of technology
This approach enhances transformation performance and encoding efficiency by effectively determining and signaling a non-separable transformation kernel, improving the encoding and decoding of high-resolution images.
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Smart Images
Figure 2026521765000001_ABST
Abstract
The video decoding method and apparatus according to this disclosure can acquire residual information from a bitstream, derive conversion coefficients for the current block based on the residual information, perform an inverse transformation on the conversion coefficients for the current block to derive a residual sample for the current block, and restore the current block based on the residual sample for the current block. Here, the inverse transformation is performed based on at least one of an unseparated linear transformation, an unseparated quadratic transformation, or a separated linear transformation, and the unseparated linear transformation may be applied based on the size of the current block.
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