User manual

19
Temporal Noise Reduction
A temporal noise filter takes advantage of the fact that noise is a random element of the image that changes over time.
Instead of simply evaluating individual frames, a temporal noise filter evaluates several frames at once. By identifying the
differences between two frames and then removing that data from the final image, visible noise can be reduced very effec-
tively. If there are no objects in motion, this is a virtually perfect noise-reduction technique that preserves most of the detail.
However, a problem arises if there are moving objects in the image, which also cause differences from one frame to the
next; of course, these differences should be retained. If moving objects are not distinguished from noise, a ghosting or
smearing effect is seen.
HQV processing uses a per-pixel motion-adaptive and noise-adaptive temporal filter to avoid the artificial appearance and
artifacts associated with conventional noise filters. To preserve maximum detail, moving pixels do not undergo unneces-
sary noise processing. In static areas, the strength of noise reduction is determined on a per-pixel basis, depending on the
level of noise in the surrounding pixels as well as in previous frames, allowing the filter to adapt to the amount of noise in
the image at any given time. The end result is a natural-looking picture with minimal noise and grain and maximum preser-
vation of fine details.
Detail Enhancement
Detail enhancement brings out the fine detail in scenes and is important for SD and HD material. For example, it’s possible
to see blades of grass, small details on jackets, and wrinkles on faces. When combined with noise reduction and advanced
scaling, Reon-VX detail enhancement can make regular DVDs approach the quality of high-definition DVDs.
Block Noise Reduction
The goal of Block Noise Reduction is to minimize the very visible square edges around MPEG2 macroblocks caused by HF
detail being chucked away within square blocks, leaving just coarse detail (or DC) which emphasizes the block structure.
The Block Noise Reduction aims to reduce the visibility of the edges of the blocks when this compression kicks in.
Mosquito Noise Reduction
Satellite and cable providers, as well as PVRs, compress the signal to get the maximum content into the smallest space.
Reon-VX delivers high-quality codec (mosquito+block) noise reduction to remove the noise and artifacts caused by this
compression.
HQV Video Processing