Grass Valley ProCoder 3 - Manual (Page 191)

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ProCoder 3
W
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Using ProCoder
Helpful Hints
ProCoder Reference
Glossary
Index
11
Video Filters
Temporal Noise Reducer
Description
The Video Temporal Noise Reducer Filter reduces noise in video by analyzing
previous frames. This filter is recommended to clean noisy video sources such as old
analog recordings.
Options
Settings
Radius of chrominance blur
Use the slider to determine the chrominance blur radius. Larger value will remove
larger amount of chrominance noise. Use smaller values to maintain color sharpness.
Use zero value to completely disable chrominance blur, other video noises(impulse,
scratches, lines etc) will still be removed.
Threshold for luminance locking
Sets the threshold for luminance locking and also helps in pixel change detection.
Larger values allow large change in intensity to be locked but may cause motion
blurring. Smaller values adversely affects the per formance of noise filtering. Use
smaller values for video containing more motion and vice versa.
Threshold for chrominance locking
Sets the threshold for chrominance locking and also helps in pixel change detection.
Larger values allow for more shifts in color to be locked. Smaller values adversely
affects the performance of noise filtering. Generally the threshold of chrominance lock
can be higher than the threshold for luminance locking.
Pixel refresh rate
Determines the maximum number of times a pixel can be locked beyond which all
corresponding prior information is flushed. However the pixel is still filtered with
spatial techniques.
Threshold for new scene detection
Determines the percentage of pixels in the frame that must change for the frame to be
considered a new scene. Small values may cause false scene change detection and
vice versa. For new scenes, all the pixel’s prior information is flushed, however they
are still filtered with spatial techniques.
Notes
No notes.
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