Apparatus to suppress artifacts of an image signal and method thereof

An apparatus to suppress artifacts, the apparatus comprising:

• a diffusion calculation unit to calculate a diffusion amount between a first pixel value and a second pixel value based on a conduction coefficient that monotonically decreases as a result of an increase in the differential value between the first pixel value and the second pixel value;
• an artifact suppressor to suppress artifacts by converting the first pixel value into a converted pixel value while compensating for the movement using the diffusion amount;
• and
• a scanning line decision unit deciding whether a first scanning line of the input image signal is an interpolated scanning line from a de-interlacing process;
• wherein if the scanning line decision unit decides that the scanning line of the input image signal is the interpolated scanning line, the differential value is calculated.

A method of suppressing artifacts, the method comprising:

• calculating a differential value between a present pixel value and an adjacent pixel value with respect to an input image signal;
• computing an amount of diffusion between the present pixel value and the adjacent pixel value based on a conduction coefficient that monotonically decreases as a result of an increase in the differential value calculated by the calculating operation;
• converting the present pixel value of the input image signal into a proper pixel value based on the diffusion amount between the pixels calculated by the computing operation;
• and
• deciding whether a scanning line of the input image signal is a scanning line interpolated through a de-interlacing process,
• wherein if it is decided that the scanning line of the input image signal is the interpolated scanning line by the deciding operation, the calculating operation calculates the differential value.

A method to suppress artifacts, the method comprising:

• calculating a diffusion amount between a first pixel value and a second pixel value based on a conduction coefficient that monotonically decreases as a result of an increase in the differential value between the first pixel value and the second pixel value;
• suppressing artifacts by converting the present pixel value into a converted pixel value while compensating for the movement using the diffusion amount;
• and
• deciding whether a scanning line of the input image signal is a scanning line interpolated through a de-interlacing process,
• wherein if it is decided that the scanning line of the input image signal is the interpolated scanning line by the deciding operation, the differential value is calculated.

An apparatus to suppress artifacts, comprising:

• a differential value calculation unit to calculate a differential value based upon the difference between a first pixel value and a second pixel value of an input image signal;
• a diffusion amount calculation unit to determine a conduction coefficient that decreases according to an increase in the differential value calculated by the differential value calculation unit;
• a pixel value conversion unit to convert the first pixel value of the input image into an image signal based on the conduction coefficient and the differential value for a predetermined number of repetitions;
• and
• a scanning line detection unit to decide whether a first scanning line of the input image signal is an interpolated scanning line from a de-interlacing process;
• wherein if the scanning line detection unit determines that the scanning line of the input image signal is an interpolated scanning line, the differential value calculation unit calculates the differential value.