Patent ID: 6522339
Filing Date: 2003-02-18
Classification: H04N

Abstract:
A device for converting interlace system picture signal into non-interlace system picture signal, comprising:a two-dimensional scanline interpolation and resolution conversion means for converting interlace system picture signal into non-interlace system picture signal based on picture signal of scanning lines in one field; a three-dimensional scanline interpolation and resolution conversion means for converting interlace system picture signal into non-interlace system picture signal based on picture signal of scanning lines in previous field or multiple fields; and a movement-adaptive processing means for detecting the difference between previous-frame picture signal and current-frame picture signal, detecting degree of movement in image by converting the resolution of said difference signal, and varying the ratio of addition to the picture signals output from said two-dimensional scanline interpolation and resolution conversion means and said three-dimensional scanline interpolation and resolution conversion means according to the degree of movement; wherein said two-dimensional scanline interpolation and resolution conversion means and said three-dimensional scanline interpolation and resolution conversion means conduct the interpolation of scanning line at a given resolution while varying coefficient to weight scanning lines of interlace system picture signal to each of interpolation scanning lines to be inserted into the interval of said scanning lines of interlace system picture signal and simultaneously varying said coefficient to weight scanning lines of interlace system picture signal to each of fields.