ИСТИНА

Provided are scalable video encoding and decoding methods for optimization of a memory bandwidth and a computational quantity when inter-layer prediction is performed. The scalable video encoding method includes determining a reference layer image from among base layer images so as to perform inter-layer prediction on an enhancement layer image, determining, using the enhancement layer image, not to perform inter prediction on enhancement layer images when an upsampled reference layer image is determined by performing inter-layer (IL) interpolation filtering on the reference layer image, and encoding a residue component between the upsampled reference layer image and the enhancement layer image.