COLOR VIDEO SCALABILITY ENCODING AND DECODING METHOD AND DEVICE THEREOF

摘要

A method and an apparatus for encoding and decoding color video scalability are provided to prevent unnecessary data amount from increasing when storing or transmitting encoded information, improve encoding efficiency by not doubly encoding the same information as already encoded information, prevent the same information as already decoded information from being doubly decoded and improve decoding efficiency. A color video scalability encoding method includes encoding a color image block of an improvement stratum by using lower stratum information. The encoding generates a color sign block pattern value according to quantization coefficient values of a residual color image block by using the lower stratum information. A color video scalability decoding method includes determining presence/absence of an improvement stratum having a different color format from that of a lower stratum in a received bit stream, and decoding a color image block of the improvement stratum by using the lower stratum information.