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US 6,646,686 B1Granted
Managing alpha values for video mixing operations
AssigneeIntel Corporation
InventorsPaul S. Gryskiewicz, Aniruddha P. Joshi
Life of this patent
Estimating the term…
Abstract
Alpha values associated with video mixing operations are sent to a memory on a low pin count bus. The memory is accessible to a video mixer, which retrieves the alpha values to perform a mixing operation. The alpha values for a field are sent to the memory during the field time for a previous field rather than during the vertical blanking interval. The alpha values may be compressed prior to transmission.
Claims22
A method comprising:
- receiving alpha values associated with a video field into a memory buffer in a first field time;
- receiving a graphics signal and a video signal associated with the field into a video mixer in a second field time;
- receiving the alpha values from the memory buffer into the video mixer;
- and
- combining the graphics signal with the video signal using the alpha values.
2 more elements
A method comprising:
- encoding alpha values associated with a field in a first field time;
- receiving a graphics signal and a video signal associated with the field into a video mixer in a second field time;
- sending the alpha values to the video mixer over a low pin count bus;
- and
- combining the graphics signal with the video signal using the alpha values.
2 more elements
A system comprising:
- a memory to store alpha values in a first field time;
- and
- a video mixer coupled to the memory to:
- retrieve the alpha values from the memory;
- and
- combine a video signal with a graphics signal in a second field time, using the alpha values.
3 more elements
An article comprising a medium comprising instructions which, if executed, enable a processor-based system to:
- receive alpha values associated with a field into a memory buffer in a first field time;
- receive a graphics signal and a video signal associated with the field into a video mixer in a second field time;
- retrieve the alpha values from the memory buffer into the video mixer;
- and
- combine the graphics signal with the video signal using the alpha values.
2 more elements
Dependencies are inferred from the claim text.