VIDEO CODING METHOD AND VIDEO CODING APPARATUS

摘要

To provide a method and an apparatus for adaptively improving the image quality of current images to be coded by reducing effects due to pulsing artifacts. The video coding method of the present invention is intended for coding a video on a per predetermined block basis using one or more predetermined quantization control variables, and includes: calculating a correlation degree indicating the correlation between an original block in a current original picture to be coded and a prediction block in a previous uncompressed picture; changing a first predetermined quantization control variable to a second predetermined quantization control variable so as to reduce a quantization step size in the case where the correlation degree is greater than a predetermined threshold; and determining the quantization step size based on the second quantization control variable, and coding the original block on the determined quantization step size basis using a predetermined image coding tool.