US Patent Application 18198382. IMAGE CODING METHOD BASED ON SECONDARY TRANSFORM, AND DEVICE THEREFOR simplified abstract
Contents
IMAGE CODING METHOD BASED ON SECONDARY TRANSFORM, AND DEVICE THEREFOR
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IMAGE CODING METHOD BASED ON SECONDARY TRANSFORM, AND DEVICE THEREFOR - A simplified explanation of the abstract
- This abstract for appeared for US patent application number 18198382 Titled 'IMAGE CODING METHOD BASED ON SECONDARY TRANSFORM, AND DEVICE THEREFOR'
Simplified Explanation
The image decoding method described in this document involves several steps. First, transform coefficients are derived by reversing the quantization process using quantized transform coefficients for a specific block. Then, modified transform coefficients are derived by applying an inverse reduced secondary transform (RST) to the original transform coefficients. Finally, a restoration picture is generated by applying an inverse primary transform to the modified transform coefficients, using residual samples for the target block. The modified transform coefficients are arranged in a two-dimensional order based on the row or column priority direction, depending on the intra prediction mode applied to the target block.
Original Abstract Submitted
An image decoding method according to the present document comprises the steps of: deriving transform coefficients through inverse quantization on the basis of quantized transform coefficients for a target block; deriving modified transform coefficients on the basis of an inverse reduced secondary transform (RST) for the transform coefficients; and generating, on the basis of an inverse primary transform for the modified transform coefficients, a restoration picture based on residual samples for the target block, wherein the modified transform coefficients derived according to the inverse RST are two-dimensionally arranged according to the order of a row priority direction or a column priority direction according to an intra prediction mode to be applied to the target block.
