US Patent Application 18232287. IMAGE CODING METHOD BASED ON TRANSFORM, AND DEVICE FOR SAME simplified abstract
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IMAGE CODING METHOD BASED ON TRANSFORM, AND DEVICE FOR SAME
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IMAGE CODING METHOD BASED ON TRANSFORM, AND DEVICE FOR SAME - A simplified explanation of the abstract
This abstract first appeared for US patent application 18232287 titled 'IMAGE CODING METHOD BASED ON TRANSFORM, AND DEVICE FOR SAME
Simplified Explanation
The patent application describes an image decoding method that involves determining the position of the final significant coefficient in a current block and transforming coefficients based on residual information. It also involves determining if the index of a sub-block containing the final significant coefficient is 0 and if the position of the final significant coefficient in the sub-block is greater than 0. Additionally, it determines if a significant coefficient exists in a specific area of the current block and parses an LFNST index from a bitstream when certain conditions are met.
- Image decoding method based on residual information and coefficient transformation
- Determines position of final significant coefficient in a current block
- Checks if index of sub-block containing final significant coefficient is 0
- Checks if position of final significant coefficient in sub-block is greater than 0
- Determines if significant coefficient exists in a specific area of the current block
- Parses LFNST index from bitstream when conditions are met
Original Abstract Submitted
An image decoding method according to the present document may include the steps of: deriving the position of the final significant coefficient in the current block and transform coefficients for the current block on the basis of residual information; determining whether the index of a sub-block including the final significant coefficient is 0 and whether the position of the final significant coefficient in the sub-block is greater than 0; determining whether a significant coefficient exists in a second area excluding a first area at the upper left end of the current block; and parsing an LFNST index from a bitstream when the position of the final significant coefficient is determined to be greater than 0 in the sub-block in which the index is and the significant coefficient does not exist in the second area.
