SCALABLE VIDEO ENCODING APPARATUS AND METHOD AND SCALABLE VIDEO DECODING APPARATUS AND METHOD

摘要

A scalable image encoding apparatus and a method thereof and a scalable image decoding apparatus and a method thereof are provided to perform encoding by extending the first bit of bit depth to the second bit of bit depth while maintaining forward compatibility with a decoder of the first bit which is bit depth. A first residue image generating unit(510) generates a residue image between an N bit restoration image and an N bit original image obtained by temporal/spatial prediction of an N bit reference image. A first converting unit(520) converts the residue image provided from the first residue image generating unit to generate a converting coefficient. A first bit stream connecting unit(550) connects a base layer bit stream with an extension layer bit stream. The first bit stream connecting unit including an extension layer identifier generates a scalable bit stream.