Video image encoding and decoding device using adaptive pseudo random noise injection during planar mode filtering

A video decoding device comprising:

• an inverse quantization unit which inverse-quantizes a quantization index to obtain a quantization representative value;
• an inverse frequency transform unit which inverse-transforms the quantization representative value obtained by the inverse quantization unit, to obtain a reconstructed image block;
• and
• a noise injection unit which injects pseudo random noise to a noise injection area when planar mode filtering occurs and wherein the noise injection area is centered on a boundary of the reconstructed image block and excludes a basic image area.

A video encoding method comprising:

• inverse-quantizing a quantization index to obtain a quantization representative value;
• inverse-transforming the obtained quantization representative value to obtain a reconstructed image block;
• and
• injecting pseudo random noise to a noise injection area when planar mode filtering occurs, wherein the noise injection area is centered on a boundary of the reconstructed image block and excludes a basic image area.

A video decoding method comprising:

• inverse-quantizing a quantization index to obtain a quantization representative value;
• inverse-transforming the obtained quantization representative value to obtain a reconstructed image block;
• and
• injecting pseudo random noise to a noise injection area when planar mode filtering occurs, wherein the noise injection area is centered on a boundary of the reconstructed image block and excludes a basic image area.

A non-transitory computer readable information recording medium storing a video encoding program, when executed by a processor:

• inverse-quantizing a quantization index to obtain a quantization representative value;
• inverse-transforming the obtained quantization representative value to obtain a reconstructed image block;
• and
• injecting pseudo random noise to a noise injection area when planar mode filtering occurs, wherein the noise injection area is centered on a boundary of the reconstructed image block and excludes a basic image area.

A non-transitory computer readable information recording medium storing a video decoding program, when executed by a processor:

• inverse-quantizing a quantization index to obtain a quantization representative value;
• inverse-transforming the obtained quantization representative value to obtain a reconstructed image block;
• and
• injecting pseudo random noise to a noise injection area when planar mode filtering occurs, wherein the noise injection area is centered on a boundary of the reconstructed image block and excludes a basic image area.