IMAGE ENCODING/DECODING METHOD AND DEVICE THEREFOR

Abstract: the present invention relates to a video signal decoding method based on a multiple transform selection (mts). the method may comprise the steps of parsing a first syntax element representing whether mts applies to the inverse transformation of a current block, wherein the mts represents a transform mode which uses a transform type other than a default transform type predefined for the current block; by performing inverse quantization on the current block, deriving an inverse-quantized transform coefficient array having the width and the height of the current block; determining, on the basis of the first syntax element, a vertical transform type applying to the vertical direction of the current block, and a horizontal transform type applying to the horizontal direction of the current block; and, by performing inverse transformation on the inverse-quantized transform coefficient array by using the vertical transform type and the horizontal transform type, deriving a residual sample array having the width and the height of the current block.

Inventor(s): Moonmo Koo, Mehdi Salehifar, Seunghwan Kim, Jaehyun Lim

CPC Classification: H04N19/44 (Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder)

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