18101335. TRANSFORM-BASED IMAGE CODING METHOD AND DEVICE THEREFOR simplified abstract (LG ELECTRONICS INC.)
TRANSFORM-BASED IMAGE CODING METHOD AND DEVICE THEREFOR
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TRANSFORM-BASED IMAGE CODING METHOD AND DEVICE THEREFOR - A simplified explanation of the abstract
This abstract first appeared for US patent application 18101335 titled 'TRANSFORM-BASED IMAGE CODING METHOD AND DEVICE THEREFOR
Simplified Explanation
The image decoding method described in this patent application involves updating the intra-prediction mode of a chroma block based on the intra-prediction mode of a corresponding luma block. This update is done using a cross-component linear model (CCLM) mode. Additionally, a set of LFNST matrixes is determined based on the updated intra-prediction mode. The updated intra-prediction mode is derived from a specific position in the luma block and is updated as an intra-DC mode if the intra-prediction mode for that specific position is an intra-block copy (IBC) mode.
- The method updates the intra-prediction mode of a chroma block based on the intra-prediction mode of a corresponding luma block.
- The update is done using a cross-component linear model (CCLM) mode.
- A set of LFNST matrixes is determined based on the updated intra-prediction mode.
- The updated intra-prediction mode is derived from a specific position in the luma block.
- If the intra-prediction mode for that specific position is an intra-block copy (IBC) mode, the updated intra-prediction mode is updated as an intra-DC mode.
Potential Applications
This image decoding method can be applied in various fields where image compression and decoding are required. Some potential applications include:
- Video streaming services
- Digital television broadcasting
- Video conferencing systems
- Video surveillance systems
Problems Solved
The image decoding method described in this patent application solves several problems in the field of image compression and decoding. These problems include:
- Inaccurate intra-prediction modes for chroma blocks
- Inefficient determination of LFNST matrixes
- Lack of synchronization between intra-prediction modes of chroma and luma blocks
Benefits
The use of this image decoding method offers several benefits, including:
- Improved accuracy in determining intra-prediction modes for chroma blocks
- Efficient determination of LFNST matrixes
- Synchronization between intra-prediction modes of chroma and luma blocks
- Enhanced image quality in decoded images
Original Abstract Submitted
An image decoding method according to the present document comprises the steps of: updating an intra-prediction mode of a chroma block on the basis of an intra-prediction mode of a luma block corresponding to the chroma block on the basis of the intra-prediction mode of the chroma block being a cross-component linear model (CCLM) mode; and determining a LFNST set including LFNST matrixes on the basis of the updated intra-prediction mode, wherein the updated intra-prediction mode is derived as an intra-prediction mode corresponding to a specific position in the luma block, and the updated intra-prediction mode is updated as an intra-DC mode on the basis of the intra-prediction mode, that corresponds to the specific position, being an intra-block copy (IBC) mode.
