VIDEO STREAM ENCODING METHOD ACCORDING TO A LAYER IDENTIFIER EXPANSION AND AN APPARATUS THEREOF, AND A VIDEO STREAM DECODING METHOD ACCORDING TO A LAYER IDENTIFIER EXPANSION AND AN APPARATUS THEREOF

摘要

Provided is a video stream decoding method which reconstructs an image, the video stream decoding method comprises the steps of: acquiring, from bitstreams including a plurality of layer encoding image data, a first identifier of at least one layer image to be decoded among a plurality of layer images; acquiring, from the bitstreams, a second identifier including information expressing a layer identifier that goes beyond an expression range of the first identifier; determining a layer identifier by using the first identifier and the second identifier; and decoding the layer image to be decoded by using the determined layer identifier, so as to reconstruct the image.