Abstract: A video coding apparatus is provided to reduce pulsing artifacts. The video coding apparatus includes a correlation calculation unit calculating a correlation value indicating a correlation degree of correlation between: a first block; and a second block or a third block. The first block includes pixels included in a first original picture in an original picture sequence of original pictures, the second block includes pixels included in a second original picture which precedes the first original picture, and the third block is obtained by coding and reconstructing the second block. The video coding apparatus also includes a correlation judgment unit judging whether the correlation value exceeds a first threshold, and judging that the correlation is high when the correlation value exceeds the first threshold, and includes a blending unit blending the first block and the third block when the correlation judgment unit judges that the correlation is high.

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

Abstract: The video coding apparatus of the present invention for reducing pulsing artifacts includes: a correlation calculation unit which calculates a correlation value indicating a correlation degree of correlation between: a first block; and a second block or a third block. The first block including pixels included in a first original picture in an original picture sequence of original pictures, the second block including pixels included in a second original picture which precedes the first original picture, and the third block being obtained by coding and reconstructing the second block. The video coding apparatus includes a correlation judgment unit which judges whether the correlation value exceeds a first threshold, and judge that the correlation is high when the correlation value exceeds the first threshold; and a blending unit which blends the first block and the third block when the correlation judgment unit judges that the correlation is high.

Abstract: 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.