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Video coding apparatus which forms an optimum prediction signal which is designated by a set of motion vectors of separate reference pictures
| Details |
Inventors: Odaka, Toshinori; Uetani, Yoshiharu; Masuda, Tadaaki; Yamakage, Tomoo; Ueno, Hideyuki; Yamaguchi, Noboru; Kikuchi, Yoshihiro; Oku, Tadahiro;
Assignee: Kabushiki Kaisha Toshiba (Kawasaki, JP)
Primary Examiner: Chin; Tommy P.
Assistant Examiner: Tung; Bryan S.
Attorney, Agent or Firm: Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
A video coding apparatus includes a memory for storing a coded picture signal used as a reference picture signal, a vector detecting circuit for detecting, from plural field picture signals or plural frame picture signals which are read out from the memory and the reference picture signals, an optimum motion vector regarding a picture to be coded, a prediction signal producing circuit for subjecting a spatial-temporal filtering to a reference picture designated by the optimum motion vector to produce a prediction signal, and a coding circuit for coding the to-be-coded picture signal on the basis of the prediction signal. |
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DETAILED DESCRIPTION It is an object of the present invention to provide a video coding apparatus which predicts one field from the other field within one frame.
It is another object of the present invention to provide a video coding apparatus which searches for a region adjacent to the partial pictures which are to be coded from among a plurality of coded frames, and obtains prediction signals by performing spatial-temporal filtering of the pictures.
It is another object of the present invention to provide a video coding apparatus which obtains a prediction signal by limiting the searching range of motion vectors.
It is another object of the present invention to provide a video coding apparatus which forms different prediction values in accordance with the values of motion vectors.
According to the present invention, there is provided a video coding apparatus comprising: a memory for storing a coded video signal used for prediction as a reference video signal; a motion vector detecting circuit for detecting, using from one field picture signal read out from the memory, a motion vector regarding the other field picture signal to be coded, a pair of the one field picture signal and the other field picture signal forming a frame video signal; a prediction signal producing circuit for producing a prediction signal based on a reference video signal designated by the motion vector detected by the motion vector detecting circuit; and a coding circuit for coding a difference between the prediction signal and a video signal corresponding to the other field picture signal to be coded.
According to the present invention, there is provided a video coding apparatus comprising: a memory for storing a coded video signal used as a reference video signal; a vector detecting circuit for detecting, from plural field picture signals or plural frame picture signals which are read out from the memory and the reference picture signals, an optimum motion regarding a picture signal to be coded; a prediction signal producing circuit for subjecting a spatial-temporal filtering to a reference picture signal designated by the optimum motion vector to produce a prediction signal; and a coding circuit for coding the picture signal to be coded on the basis of the prediction signal
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Television 
