| 摘要 |
A system and method provides for blending video data with graphics data and outputting video frames comprising blended video and graphics. There is a host computer capable of communicating with one or more integrated computer graphics cards, and at least one integrated computer graphics card. The integrated computer graphics card comprises a local bus; an MPEG decoder communicating with the local bus; a first video frame buffer communicating with the MPEG decoder; and a graphics processor communicating with the MPEG decoder by means of a dedicated digital video bus. The graphics processor further communicates with the local bus and a second frame buffer communicates with the graphics processor, for blending video data and graphics data in the second frame buffer according to alpha data from the host computer system. An analog TV decoder communicates with the graphics processor by means of the dedicated digital video bus, and a video output port connects to the graphics processor, for outputting video frames comprising blended video and graphics.
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