Phase control multi-tap downscale filter

摘要

Implementations include video image processing systems, methods, and apparatus for downscaling video data using a phase control multi-tap downscale filter. For example, a device configured to process video information may include a memory configured to store a downscaling filter comprising a number of coefficients. A processor may be configured to receive video input data and determine a scale factor between the video input data and a video output. In addition, the processor may be configured to modify the downscaling filter based on the scale factor and the number of coefficients in the unmodified downscaling filter. The processor may be configured to downscale the video input data using the modified downscaling filter.

主权项

1. A device configured to process video information, the device comprising:
a memory configured to store a downscaling filter comprising a first set of coefficients; and a processor in communication with the memory, the processor configured to:
receive video input data;determine a scale factor between the video input data and a video output;determine a sub phase step based on the scale factor and a number of coefficients in the first set;determine a modified downscaling filter comprising a second set of coefficients based on the sub phase step and the first set of coefficients, wherein a number of coefficients in the second set is different from the number of coefficients in the first set; anddownscale the video input data using the modified downscaling filter.