发明名称 |
VIDEO ENCODING APPARATUS AND VIDEO DECODING APPARATUS |
摘要 |
<p>An alpha-map encoding apparatus includes a first down-sampling circuit (21) for down-sampling an alpha-map signal which represents the shape of an object and the position in the frame of the object at a down-sampling ratio based on size conversion ratio information, an up-sampling circuit (23) for up-sampling the alpha-map signal at an up-sampling ratio based on size conversion ratio information given to restore the down-sampled alpha-map signal to an original size, and outputting a local decoded alpha-map signal, a motion estimation/compensation circuit (25) for generating a motion estimation/compensation signal on the basis of the previous decoded video signal and a motion vector signal, a second down-sampling circuit (26) for down-sampling the motion estimation/ compensation signal at the down-sampling ratio, a binary image encoder for encoding the alpha-map signal down-sampled by the first down-sampling circuit to a binary image in accordance with the motion estimation/ compensation signal down-sampled by the second down-sampling circuit, and outputting an encoded binary image signal, and a multiplexes for multiplexing and outputting the encoded binary image signal and the up-sampling ratio information.</p> |
申请公布号 |
CA2240132(A1) |
申请公布日期 |
1998.05.07 |
申请号 |
CA19972240132 |
申请日期 |
1997.10.31 |
申请人 |
KABUSHIKI KAISHA TOSHIBA;KABUSHIKI KAISHA TOSHIBA |
发明人 |
YAMAGUCHI, NOBORU;WATANABE, TOSHIAKI;KIKUCHI, YOSHIHIRO;IDA, TAKASHI |
分类号 |
H04N19/50;G06T3/40;G06T9/00;H03M7/36;H03M7/42;H04N19/107;H04N19/13;H04N19/134;H04N19/136;H04N19/14;H04N19/166;H04N19/167;H04N19/176;H04N19/186;H04N19/196;H04N19/20;H04N19/423;H04N19/46;H04N19/463;H04N19/503;H04N19/51;H04N19/517;H04N19/52;H04N19/59;H04N19/60;H04N19/61;H04N19/65;H04N19/68;H04N19/70;H04N19/80;H04N19/85;H04N19/91;(IPC1-7):H04N7/26;H04N7/28 |
主分类号 |
H04N19/50 |
代理机构 |
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