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Video coding selectable between intra-frame prediction/field-based orthogonal transformation and inter-frame prediction/frame-based orthogonal transformation

  • US 6,324,216 B1
  • Filed: 05/30/1995
  • Issued: 11/27/2001
  • Est. Priority Date: 06/29/1992
  • Status: Expired due to Term
First Claim
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1. A picture signal encoding method comprising the steps of:

  • receiving an interlaced signal having frames each containing an odd field and an even field, said interlaced signal representing a current picture and at least one other picture;

    selecting either a first or second mode of encoding, said first mode being carried out by an intra-frame prediction encoding technique and field-based orthogonal transformation and said second mode being carried out by an inter-frame prediction encoding technique and frame-based orthogonal transformation;

    predictively encoding the current picture relative to said at least one other picture by the prediction encoding technique that is carried out by the selected mode of encoding; and

    orthogonally transforming the predictively encoded current picture by the orthogonal transformation that is carried out by the selected mode of encoding.

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