IMAGE ENCODING AND DECODING METHOD AND THE SAME APPARATUS

摘要

PURPOSE: An image encoding and decoding method and a device thereof are provided to efficiently perform quantization, de-blocking filtering, entropy encoding/decoding, motion prediction, rate control, and rate-distortion optimization, thereby increasing encoding and decoding performance. CONSTITUTION: An encoding unit encodes unit information of an encoding target unit(110). A quantization parameter determining unit determines a quantization parameter of an encoding target unit based on unit information of the encoding target unit. A remaining quantization parameter determining unit determines a remaining quantization parameter based on a predicted quantization parameter and the quantization parameter of the encoding target unit. The encoding unit encodes the determined remaining quantization parameter(130).