System and method for implementing graphics and video...

Details System and method for implementing graphics and video... System and method for implementing graphics and video...

2011-08-23

2011-08-23

Patel, Kanji (Department: 2624)

Image analysis

Image enhancement or restoration

Image filter

C382S300000

Reexamination Certificate

active

08005312

ABSTRACT:
A video processing system may implement a video scaling algorithm using interpolation based on polyphase filtering. A video or graphics scaler may be utilized to scale luma, chroma, and/or alpha information in a video image. The scaler may comprise a first polyphase sub-filtering with zero phase shift that generates an in-phase filtered output from an input video image and a second polyphase sub-filtering that generates an out-of-phase filtered output from the input video image. The video scaler may also comprise an interpolator that may generate a scaled video image based on the generated in-phase and out-of-phase filtered outputs and a scaling factor. The scaling factor may be determined based on an input video size (M) and a desired output video size (N). The interpolation of the generated in-phase and out-of-phase filtered outputs in the video scaler may be implemented by utilizing a Farrow structure.

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