Title:
動きベクトル検出・補償装置
Document Type and Number:
Japanese Patent JP4145275
Kind Code:
B2
Abstract:
There is provided a motion estimation and compensation device 10 that avoids discrepancies in chrominance components which could be introduced in the process of motion vector estimation. The device 10 has a motion vector estimator 11 for finding motion vectors in given interlace-scanning chrominance-subsampled video signals. The estimator 11 compares each candidate block B0 to B3 in a reference picture with a target block B in an original picture by using a sum of absolute differences (SAD) in luminance as similarity metric, chooses a best matching candidate block that minimizes the SAD, and determines its displacement relative to the target block. In this process, the estimator 11 gives the SAD of each candidate block 80 to B3 an offset determined from the vertical component of a corresponding motion vector, so as to avoid chrominance discrepancies. A motion compensator 12 then produces a predicted picture using such motion vectors and calculates prediction error by subtracting the predicted picture from the original picture.
Inventors:
Ryushi Otsuka
Takahiko Tahira
Akihiro Yamori
Takahiko Tahira
Akihiro Yamori
Application Number:
JP2004219083A
Publication Date:
September 03, 2008
Filing Date:
July 27, 2004
Export Citation:
Assignee:
富士通株式会社
International Classes:
G06T7/20; H04N11/04; H04N19/105; H04N19/134; H04N19/176; H04N19/186; H04N19/196; H04N19/50; H04N19/503; H04N19/51; H04N19/513; H04N19/59; H04N19/61; H04N19/625; H04N19/85; H04N19/91
Domestic Patent References:
| JP2004040494A |
Attorney, Agent or Firm:
Takeshi Hattori