BLOCK ENCODING SYSTEM USING BIT RATE-DISTORTION RATIO

摘要

The present invention relates to a block division encoding system for compressing a moving image and a still image. A block encoding system using a bit rate-distortion ratio according to an aspect of the present invention comprises: an initialization unit for setting parameters related to a criterion for determining the importance of a list item and a criterion on whether to perform encoding; an LIP alignment unit for calculating an expected bit rate-distortion ratio value, which is acquired when encoding the importance of coefficients included in a list, and encoding the list coefficient according to the calculation; an LIB alignment unit for calculating an expected bit rate-distortion ratio value when encoding the importance of a block included in the list, and encoding the block according to the calculation; an LSP refinement unit for encoding a refinement bit for coefficients which are determined to be important as a result of the execution of the LIP alignment unit and the LIB alignment unit; and an entropy encoding unit for entropy-encoding the importance of the coefficients, a code, the importance of the block, and the refinement bit, using an adaptive arithmetic coder.