Patent ID: 6243140
Filing Date: 2001-06-05
Classification: H04N

Abstract:
A method of generating data representing a sequence of progressive images, from data representing a sequence of first, second and third interlaced frames, the data representing each interlaced frame including data representing a first field and a second field, the method comprising the steps of:performing a first motion compensated interpolation operation to generate data representing a first progressive image from data representing the first interlaced frame, the motion compensated interpolation operation including making an estimate of the image motion between a portion of a field of the first interlaced frame and a corresponding portion of a subsequent interlaced frame in the sequence of interlaced frames and accessing a memory device used to store reference frame data used by a decoder to support motion compensated prediction operations to obtain from the memory device data representing said corresponding portion of a subsequent interlaced frame; andgenerating, by performing a second motion compensated interpolation operation, data representing a second progressive image from data representing the second interlaced frame, the motion compensated interpolation operation including the step of making an estimate of the image motion between a portion of a field of the second interlaced frame and a corresponding portion of a preceding frame in the sequence of interlaced frames.