Title:
動画像の復号化方法
Document Type and Number:
Japanese Patent JP5418710
Kind Code:
B2
Abstract:
In order to prevent accumulation of rounding errors caused by the integer-based bilinear interpolation used in the motion compensation process of image coding and decoding methods, two types of P frames are used for unidirectional motion compensation prediction, namely:P+ frames, which round the results of bilinear interpolation with real number operations to the nearest integer and rounds half integer values (0.5 added to an integer) away from zero, andP- frames, which differs from P+ frames in that the above mentioned half integer values are rounded towards zero.Utilising both of these P+ and P- frames enables cancelling of rounding errors and prevents the accumulation of rounding errors.
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Inventors:
Yuichiro Nakaya
Sleeping Righteous
Sleeping Righteous
Application Number:
JP2013083479A
Publication Date:
February 19, 2014
Filing Date:
April 12, 2013
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
H04N5/232; H04N19/50; G06F7/38; G06T9/00; H03M7/36; H04N7/24; H04N19/102; H04N19/103; H04N19/105; H04N19/112; H04N19/134; H04N19/136; H04N19/137; H04N19/159; H04N19/172; H04N19/186; H04N19/196; H04N19/423; H04N19/46; H04N19/503; H04N19/51; H04N19/523; H04N19/577; H04N19/59; H04N19/593; H04N19/61; H04N19/625; H04N19/70; H04N19/85
Domestic Patent References:
| JP2998741B2 | ||||
| JP6214754A |
Attorney, Agent or Firm:
Manabu Inoue