| US 7,394,462 B2 | ||
| Superimposing apparatus and method for broadcasting three-dimensional computer graphics image | ||
| Kozo Murakami, Sapporo (Japan) | ||
| Assigned to Kabushiki Kaisha Micronet, Chuo-ku, Sapporo (Japan) | ||
| Filed on Jul. 31, 2002, as Appl. No. 10/207,982. | ||
| Claims priority of application No. 2002-137391 (JP), filed on May 13, 2002. | ||
| Prior Publication US 2003/0210351 A1, Nov. 13, 2003 | ||
| Int. Cl. G06T 15/00 (2006.01) | ||
| U.S. Cl. 345—419 [345/629; 345/563; 345/584; 345/632; 345/633; 345/634; 345/638; 348/473] | 13 Claims |
| 1. A superimposing apparatus for broadcasting a 3DCG image, comprising:
a three-dimensional graphics accelerator for forming a 3DCG image by rendering a respective 3DCG image at each frame period;
and
a superimposer for forming a broadcasting image on which said 3DCG image is superimposed by mixing said 3DCG image formed
by said three-dimensional graphics accelerator with a current frame of an input TV signal;
said three-dimensional graphics accelerator and said superimposer are constructed to operate concurrently;
wherein after the three-dimensional graphics starts to perform rendering the 3DCG image for the current frame and before the
three-dimensional graphics accelerator completes rendering the 3DCG image for the current frame, the superimposer starts to
mix said 3DCG image for a previous frame only with the current frame of the input TV signal, and the previous frame is immediately
adjacent to the current frame by one frame.
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