Video encoding / decoding method and apparatus, and recording medium storing a bitstream.

Abstract

The video decoding method and apparatus relating to this disclosure can derive transformation coefficients for the current block from a bitstream, determine a set of non-separable primary transforms (NSPTs) for the current block, determine an NSPT kernel for the current block based on the NSPT set and transformation index, perform NSPT on the transformation coefficients of the current block based on the NSPT kernel to derive residual samples, and reconstruct the current block based on the residual samples. NSPT may be applied based on the fact that the size of the current block belongs to a group of one or more block sizes to which NSPT can be applied.

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