Patent ID: 7027512
Filing Date: 2006-04-11
Classification: H04N

Abstract:
1. A spatio-temporal hybrid scalable video coding apparatus using subband decomposition, comprising: an encoder for applying a spatial scalability through a subband decomposition to a picture according to temporal scalability BL (base layer)/EL (enhancement layer) in order to decompose the picture into four subbands, coding one low frequency element subband in a spatial scalability BL, coding the rest three high frequency element subbands in a spatial scalability EL, magnifying a motion vector calculated through a motion estimation of the subband in the spatial scalability BL twice and using the magnified value for a motion compensation of the spatial scalability EL; and a decoder for restoring the picture of the spatial scalability BL separated from the temporal scalability BL/EL by decoding the low frequency element subband and restoring the picture of the spatial scalability EL separated from the temporal scalability BL/EL by performing a motion compensation by magnifying the motion vector of the spatial scalability BL twice; wherein the encoder comprises: a first motion estimation unit a first residual coding unit a variable length coding unit a first residual decoding unit a first buffer a second motion compensation unit a second residual coding unit a second buffer a second residual decoding unit a second motion estimation unit a third motion compensation unit a third residual coding unit a fourth residual coding unit