In a method of estimating motion vectors from subsampled video data (I), first vectors are estimated (ME, PM2) between an image with a first sub-sampling phase and an earlier image sub-sampled with a second sub-sampling phase, second vectors are estimated (ME, PM1) between an image with a second sub-sampling phase and an earlier image sub-sampled with a first subsampling phase, and the first and second vectors are combined (CD) to obtain output motion vectors (MV).
CROSS-REFERENCE TO RELATED APPLICATIONS
This is a continuation of U.S. patent application Ser. No. 09/168,454, filed Oct. 8, 1998 now U.S. Pat. No. 6,289,051.
A method and apparatus for improved processing of digitized moving pictures. A motion vector for field frame processing is produced using fewer pixels from the source image and fewer coefficients than are required by the prior art. This allows field frame motion to be processed using no more pixels than are required for other forms of motion processing, which in turn reduces the circuitry and processing time required. A reduction in the pixel processing requirement allows less circuitry to be used for this processing with equivalent throughput. Alternatively, it allows for improved throughput with an approximately equivalent amount of circuitry.
A processing circuit for motion compensated de-interlacing of video signals, having a line memory 21, a de-interlacing circuit 22, a frame memory 24, and a cache memory 25, further includes a pixel mixer 29 interposed between the cache memory 25 and the de-interlacing circuit 22.
An image display device for playing-back and displaying binary image data after decoding the above by the frame, comprises an image judging unit for judging the current frame to be a moving image or a static image, based on the time interval between the frames which have been decoded in the past, a scan converting unit for performing scan conversion on the current frame, depending on the judgment result by the image judging unit, and a display for displaying the decoded image through sequential scanning.
