Deinterlacing method for video signals based on motion-compensated interpolation

A deinterlacing method for video signals based on a motion-compensated interpolation comprising:

• (a) estimating a motion vector of a video signal by the unit of a ½ pixel, using a previous frame of the video signal, a current field of the video signal, and a future field of the video signal, and estimating a motion vector by the unit of a ¼ pixel based on the motion vector estimated by the unit of a ½ pixel while using the previous frame and the future field, in at least two search areas of different sizes each including a block for which the motion vector estimation is to be carried out;
• (b) deinterlacing the video signal by bringing pixels of the previous frame designated by a motion vector estimated at the step (a) to the current field;
• (c) conducting a side effect check for determining whether the deinterlaced video signal is reliable by checking whether the estimated motion vector has at least one of a temporal consistency, a critical velocity and a backward matching accuracy in each search area of the deinterlaced video signal;
• and
• (d) if the result of the side-effect check is satisfactory, then outputting the result of the deinterlacing as a deinterlaced value of the current field, and if not,then outputting the result of a deinterlacing conducted in accordance with a method other than that of the step (b).

A deinterlacing method for video signals comprising:

• (a) estimating a motion vector of a video signal by a first fractional unit of a pixel and a second fractional unit of a pixel respectively, using a previous frame of the video signal, a current field of the video signal, and a future field of the video signal in at least two search areas of different sizes each including a block for which the motion vector estimation is to be carried out;
• (b) deinterlacing the current field by interpolating empty pixels of the current field by pixels of the previous frame designated by the estimated motion vector to deinterlaced the current field;
• (c) conducting a side-effect check for determining whether a result of the deinterlacing meets prescribed characteristics in each search area of the deinterlaced video signal;
• and
• (d) selectively outputting the result of the deinterlacing as a deinterlaced value of the current field based upon the result of the side effect check.

A deinterlacing method for video signals comprising:

• (a) deinterlacing a video signal using motion compensation;
• (b) conducting a side-effect check by conducting at least one of a check for determining whether an estimated motion vector has a temporal consistency, a check for determining whether the estimated motion vector has a critical velocity, and a check for determining whether the estimated motion vector has a backward matching accuracy;
• and
• (c) selectively outputting the result of the deinterlacing as a deinterlaced value of the current field based upon the result of the side effect check.