Scalable video coding

摘要

Video encoding and decoding apparatuses and methods capable of minimising a random access delay are provided. The video encoding apparatus includes an encoding control unit which sets an intra frame (I-frame) interval of a base layer shorter than an I-frame interval of an enhancement layer, a base layer encoding unit which generates a base layer bitstream by reducing and encoding an original image according to the I-frame intervals set by the encoding control unit, and an enhancement layer encoding unit which generates an enhancement layer bitstream by decoding an enhancement layer image which is not temporally aligned with the base layer bitstream and referring to a predetermined image obtained by decoding the base layer bitstream and enlarging the decoded result.