Motion adaptive de-interlacing method and apparatus

An apparatus for generating an interpolated pixel at a vertical position in a field of a video frame, comprising:

• memory for receiving at least two pixels vertically adjacent said vertical position in said field and at least three pixels from at least one adjacent field;
• a motion detector for detecting a degree of motion in the vicinity of said interpolated pixel and for providing weighting factors based on said degree of motion;
• and
• a calculation device for calculating said interpolated pixel based on a combination of weighted contributions from said at least two pixels and said at least three pixels, said weighted contributions being derived from a combination of said weighting factors and at least vertical-temporal and temporal interpolation, wherein said weighted contributions comprise at least (i) a first positive contribution derived from immediately adjacent ones of said at least two pixels, (ii) a second positive contribution derived from a central one of said at least three pixels located in said vertical position, and (iii) a negative contribution derived from ones of said at least three pixels that are immediately vertically adjacent said central pixel.

A method for generating an interpolated pixel at a vertical position in a field of a video frame, comprising:

• receiving at least two pixels vertically adjacent said vertical position in said field and at least three pixels from at least one adjacent field;
• detecting a degree of motion in the vicinity of said interpolated pixel;
• providing weighting factors based on said degree of motion;
• providing a plurality of coefficients;
• selecting respective coefficients from said plurality of coefficients for each of said pixels, based on said weighting factors and at least vertical-temporal and temporal interpolation;
• multiplying said at least two pixels and said at least three pixels by said respective coefficients in order to produce said weighted contributions;
• and
• summing said weighted contributions,
• wherein for at least one degree of said motion said weighted contributions comprise at least (i) a first positive contribution derived from immediately adjacent ones of said at least two pixels, (ii) a second positive contribution derived from a central one of said at least three pixels located at said vertical position, and (iii) a negative contribution derived from the two of said at least three pixels that are immediately vertically adjacent said central pixel.

A method for generating an interpolated pixel at a vertical position in a field of a video frame, comprising:

• receiving at least two pixels vertically adjacent said vertical position in said field and at least three pixels from at least one adjacent field;
• detecting a degree of motion in the vicinity of said interpolated pixel;
• providing weighting factors based on said degree of motion;
• providing a plurality of coefficients;
• multiplying said coefficients by said weighting factors based on said degree of motion to provide a plurality of resulting products;
• adding together ones of the resulting products to provide weighting coefficients based on said degree of motion;
• multiplying said weighting coefficients by said at least two pixels and said at least three pixels to produce said weighted contributions;
• and
• summing said weighted contributions,
• wherein for at least one degree of said motion said weighted contributions comprise at least (i) a first positive contribution derived from immediately adjacent ones of said at least two pixels, (ii) a second positive contribution derived from a central one of said at least three pixels located at said vertical position, and (iii) a negative contribution derived from the two of said at least three pixels that are immediately vertically adjacent said central pixel.

A method for generating an interpolated pixel at a vertical position in a field of a video frame, comprising:

• receiving at least two pixels vertically adjacent said vertical position in said field and at least three pixels from at least one adjacent field;
• detecting a degree of motion in the vicinity of said interpolated pixel;
• providing weighting factors based on said degree of motion;
• performing at least vertical-temporal interpolation and temporal interpolation using said at least two and said at least three pixels to provide at least first and second estimates, respectively, based on contributions from said at least two pixels and said at least three pixels;
• multiplying said estimates by said weighting factors to provide weighted estimates;
• and
• summing said weighted estimates,
• wherein for at least one degree of said motion the summed weighted estimates comprise at least (i) a first positive contribution derived from immediately adjacent ones of said at least two pixels, (ii) a second positive contribution derived from a central one of said at least three pixels located at said vertical position, and (iii) a negative contribution derived from the two of said at least three pixels that are immediately vertically adjacent said central pixel.