Patent ID: 6188725
Filing Date: 2001-02-13
Classification: H04N

Abstract:
A video encoding apparatus for encoding an interlaced video signal, comprising:progressive scanning conversion means for converting one field of every m fields (where m is an integer of value 2 or greater) of said interlaced video signal to a single progressive scanning frame which has twice the scanning line density of an interlaced field, while leaving the remaining fields unchanged as interlaced scanning fields,first encoding means for encoding each said progressive scanning frame either by independent internal encoding of the frame or by unidirectional predictive encoding based on progressive scanning frames which have been encoded, andsecond encoding means for performing predictive encoding of each remaining field of said video signal other than said fields which are converted to progressive scanning frames, using, as reference frames for said predictive encoding, selected ones of said progressive scanning frames which precede and succeed said each remaining field along the time axis.