Patent ID: 7061981
Filing Date: 2006-06-13
Classification: H04N

Abstract:
1. A motion vector conversion method for an image information conversion method wherein a bit stream representative of interlaced scanned image compression information of MPEG2 is inputted and a bit stream representative of progressively scanned image compression information of MPEG4 is outputted, comprising the steps of: successively accepting 16×16 motion vectors of MPEG2 of the inputted bit stream representative of image compression information of MPEG2; and successively producing 8×8 motion vectors of MPEG4 and 16×16 motion vectors of MPEG4 based on the 16×16 motion vectors of MPEG2 such that every other one of I frames and P frames of the bit stream of MPEG2 is dropped to produce a bit stream of MPEG4 of a reduced frame rate and a low bit rate.