Video signal decompression apparatus for independently compressed even and odd field data
Error concealment apparatus for a compressed video signal processing system Patent #: 5212549
ApplicationNo. 122240 filed on 09/16/1993
US Classes:375/240.16, Motion vector348/616Dropout compensator (e.g., replacement type)
ExaminersPrimary: Britton, Howard W.
Attorney, Agent or Firm
International ClassH04N 007/50
Foreign Application Priority Data1992-09-18 FR
AbstractA method masks errors in a transmission system of a picture sequence including a first series of pictures that are autonomously coded by pixel blocks (intra coding). Each picture of the first series is followed by several pictures of a second series of pictures that are differentially coded by blocks with respect to at least one reference picture of the first series of pictures (inter coding). The codes of each block of the second picture series comprise at least a motion vector between the pixels of the block and the pixels of the elements of the reference picture. The method provides for adding, to the data corresponding to each block of an intrapicture, data indicating the motion vector of this block with respect to at least one additional picture, and, if a transmission error is detected, the error blocks of the intrapicture are processed like error blocks of an interpicture.