Judder detection apparatus, de-interlacing apparatus using the same, and de-interlacing method

Ade-interlacing apparatus, comprising:

• a judder detector to detect a pattern and to determine whether the detected pattern is similar to a judder pattern using predetermined pixel values of even and odd fields sequentially input;
• a pattern detector to detect whether an input image has a uniform pixel value in every other line of the even and odd fields and whether consecutive lines have a blind pattern having a difference value from the uniform pixel value that is greater than or equal to a threshold value;
• a determiner to determine whether the detected pattern that is similar to the judder pattern is actual judder based on whether the blind pattern is detected;
• and
• an interpolator to interpolate the even and odd fields according to the determination of the determiner.

A de-interlacing apparatus, comprising:

• a judder detector to receive an image signal having a plurality of pixels and to detect a judder pattern;
• a pattern determiner to determine whether the detected judder pattern is a result of at least one of noise and a blind pattern;
• and
• an interpolator to interpolate the image using a temporal interpolation when the detected judder pattern is determined to be a result of the at least one of noise and the blind pattern, and to interpolate the image using a spatial interpolation when the detected judder pattern is determined not to be the result of the at least one of noise and the blind pattern.

A de-interlacing method, comprising:

• detecting, with a judder detector, a pattern and determining whether the detected pattern is similar to a judder pattern using predetermined pixel values of even and odd fields sequentially input;
• detecting, with a pattern detector, whether an input image has a uniform pixel value in every other line of the even and odd fields and detecting whether consecutive lines have a blind pattern by determining whether a difference value of the uniform pixel value is greater than or equal to a threshold value;
• determining, with a determiner, whether the detected pattern is actual judder based on whether the blind pattern is detected when the detected pattern is determined to be similar to the judder pattern;
• and
• interpolating, with an interpolator, the even and odd fields according to the determination of whether the detected pattern that is similar to the judder pattern is the actual judder.

A de-interlacing method, the method comprising:

• receiving an image signal having a plurality of pixels;
• detecting a judder pattern with a judder detector;
• determining, with a determiner, whether the detected judder pattern is a result of at least one of noise and a blind pattern;
• and
• interpolating, with an interpolator, the image using a temporal interpolation when the detected judder pattern is determined to be a result of the at least one of noise and the blind pattern, and interpolating, with the interpolator, the image using a spatial interpolation when the detected judder pattern is determined not to be the result of the at least one noise and the blind pattern.

A method of detecting judder, the method comprising:

• detecting, with a judder detector, pixel patterns of an image and determining whether the detected pixel patterns match a judder pattern;
• determining, with a pattern detector/analyzer, whether the detected pixel patterns match one or more predetermined judder-like noise patterns when the detected pixel patterns are determined to match the judder pattern;
• outputting a judder detection signal when the detected pixel patterns match the judder pattern and do not match the one or more predetermined judder-like noise patterns;
• and
• outputting a non-judder detection signal when the detected pixel patterns do not match the judder pattern or when the detected pixel patterns match both the judder pattern and the one or more predetermined judder-like noise patterns.