Motion vector detector and video coder

  • US 5,929,913 A
  • Filed: 08/01/1997
  • Issued: 07/27/1999
  • Est. Priority Date: 10/28/1993
  • Status: Expired due to Fees
First Claim
Patent Images

1. A video coder comprising:

  • a prediction error image generating means for generating an image from a reference frame by using frame correlation,a band dividing means for dividing an image into plural frequency band components,a changing region detecting means for detecting a region within each frequency band component of the image that has a luminance change larger than a certain amount,a region information coding means for transmitting position information of the region detected by the changing region detecting means, anda band component coding means for transmitting only the region detected by the changing region detecting means for each frequency band component of the image divided by the band dividing means,whereby image information only in the region with a large luminance change is transmitted.

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