Title:
動き予測補償方法及び動き予測補償装置
Document Type and Number:
Japanese Patent JP4841101
Kind Code:
B2
Abstract:
A process burden for code processing is reduced by the present system and method while possibly avoiding the lowering of image quality. When compensating for motion prediction by using a multi-reference frame while sequentially changing the pixel-based sizes of motion compensating blocks, a size-reduced block is generated depending upon a motion compensating block having the greatest pixel-based size to be taken as the uppermost layer among the pixel-based sizes. Thereafter, motion vector search ranges are determined respectively within the reference frame images, on the basis of a plurality of size-reduced reference images reduced in size respectively corresponding to the size-reduction ratios of the size-reduced blocks and the size-reduced blocks. Using the determined search range, an optimal motion vector is detected while sequentially changing the pixel-based sizes of the motion compensating blocks. This can detect a motion vector by only a limited search range within the reference frame image.
Inventors:
Kazushi Sato
Yoichi Yagasaki
Yoichi Yagasaki
Application Number:
JP2002350138A
Publication Date:
December 21, 2011
Filing Date:
December 02, 2002
Export Citation:
Assignee:
ソニー株式会社
International Classes:
H03M7/36; G06T7/20; H04N19/105; H04N19/134; H04N19/136; H04N19/137; H04N19/139; H04N19/147; H04N19/15; H04N19/189; H04N19/19; H04N19/196; H04N19/423; H04N19/46; H04N19/463; H04N19/50; H04N19/503; H04N19/51; H04N19/513; H04N19/52; H04N19/523; H04N19/533; H04N19/577; H04N19/61; H04N19/625; H04N19/70; H04N19/80; H04N19/90; H04N5/14
Domestic Patent References:
| JP5236466A | ||||
| JP2001189934A | ||||
| JP7123411A |
Attorney, Agent or Firm:
Keiki Tanabe