Title:
MOVING IMAGE CODING/DECODING DEVICE USING MOVING COMPENSATION INTER-FRAME PREDICTION SYSTEM EMPLOYING AFFINE TRANSFORMATION
Document Type and Number:
Japanese Patent JP3277111
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To conduct moving compensation inter-frame prediction by obtaining a motion vector between image frames with high accuracy, conducting optimum area division to an object shape or the like and applying efficient coding/decoding to the motion vector.
SOLUTION: A moving compensation inter-frame prediction section 17 changes a coding processing area based on an input image and a reference image in a frame memory section 16 to generate a predicted image and to obtain coding side information. The prediction section 17 selects a valid/invalid mask for processing from a position of a processing object at the retrieval by a vector retrieval section 32 by using a valid area selection section 31, divides the processing area suitable for the image from a motion vector and the reference image and uses affine transformation and parallel displacement to generate a predicted image by using a variable area size prediction frame generating section 33, controls the area division and allows an area division pattern decision section 34 to provide an output of side information such as the predicted image, the motion vector and area division information. A side information coding section 35 codes an additional motion vector as a difference from a mean of basic motion vectors or applies prediction coding to the motion vector from a median of three adjacent motion vectors.
Inventors:
Nobuyuki Ema
Keiichi Hibi
Keiichi Hibi
Application Number:
JP391896A
Publication Date:
April 22, 2002
Filing Date:
January 12, 1996
Export Citation:
Assignee:
Sharp Corporation
International Classes:
H04N11/04; G06T9/00; H03M7/36; H04N19/105; H04N19/137; H04N19/167; H04N19/174; H04N19/196; H04N19/20; H04N19/423; H04N19/46; H04N19/463; H04N19/50; H04N19/503; H04N19/51; H04N19/513; H04N19/52; H04N19/533; H04N19/537; H04N19/54; H04N19/57; H04N19/70; H04N19/85; (IPC1-7): H04N7/32
Domestic Patent References:
| JP5236455A | ||||
| JP2134085A | ||||
| JP7240927A |
Other References:
【文献】如澤、小寺,アフィン変換を用いた任意形状領域MCに関する検討,1994年電子情報通信学会春季大会講演論文集,1994年3月10日,分冊7,p.65
【文献】嵯峨田、如澤,領域形状予測に基づく適応動ベクトル内挿,1995年電子情報通信学会情報・システムソサイエティ大会講演論文集,1995年8月15日,p.108
【文献】嵯峨田、如澤,領域形状予測に基づく適応動ベクトル内挿,1995年電子情報通信学会情報・システムソサイエティ大会講演論文集,1995年8月15日,p.108
Attorney, Agent or Firm:
Takaya Koike