发明名称 |
MOVING IMAGE DECODING METHOD,MOVING IMAGE DECODING APPARATUS |
摘要 |
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, and P- 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. <IMAGE> |
申请公布号 |
HK1076962(A1) |
申请公布日期 |
2009.06.19 |
申请号 |
HK20050108840 |
申请日期 |
2005.10.06 |
申请人 |
HITACHI, LTD. |
发明人 |
YUICHIRO NAKAYA;YOSHITO NEJIME |
分类号 |
H04N5/232;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;H04N19/50;H04N19/503;H04N19/51;H04N19/523;H04N19/577;H04N19/59;H04N19/61;H04N19/625;H04N19/70;H04N19/85 |
主分类号 |
H04N5/232 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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