Patent ID: 7738037

Claim:
A method for converting interlaced video material to non-interlaced video material using apparatus comprising an analog to digital converter, memory, and a processor comprising: receiving interlaced video material comprising a sequence of video fields, each video field comprising an odd field or an even field of a video frame; digitizing a plurality of said video fields of said sequence of video fields using said analog to digital converter to obtain pixel values for said video fields; storing said pixel values in said memory; for each of a plurality of sequential video fields of said sequence of video fields, comparing pixel values of a subfield of said sequential video field to pixel values of a corresponding subfield of a video field preceding a video field preceding said sequential video field using said processor to obtain a current field error value for said sequential video field; shifting a plurality of stored field error values in a set of accumulators in said memory for temporarily holding field error values to allow said current field error value to be temporarily stored in a first accumulator of said set of accumulators; identifying intervals at which a designated accumulator of said set of accumulators contains a minimum field error value of said field error values stored in said set of accumulators using said processor; designating said interlaced video material as having a non-interlaced source when said intervals comprise a regular interval using said processor; converting said interlaced video material to non-interlaced video material using said processor using a first method when said video material is designated as having a non-interlaced source and using a second method when said video material is not designated as having a non-interlaced source.