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A low setting will provide the lowest image
quality (with the highest compression).
The bit rate of the streamed image will be
affected as the Video Quality slider setting is
adjusted.
Note that a low setting may result in a blocky
looking picture.
Transform setting
The compression system supports two Transform types:
• Graphics is optimized for text and sharp lines, such as is present on most computer
screens.
• Video is optimized for smooth tone changes such as is present in movies and other
video content.
Bandwidth Management – Advanced Control
The controls in this section provide access to the complete set of image quality and bit rate
tools for the VNC 200 encoder.
The controls are divided into two main categories.
• Video Quality
• Bandwidth
Some of the controls that are available in the simple control interface previously described
are also present in this section. Where controls are duplicated, the settings will coincide.
Spatial Compression settings
The level of spatial compression is set using the Luminance and Chrominance control. These
controls are normally locked, with an optimal offset of 2 units between them.
A Luminance value of 0 provides the minimum spatial compression; a Luminance value of
10 provides the maximum spatial compression.
If required, the Chrominance compression may be set independently by clearing the Lock
check box.
A spatial compression setting of 4/6 will provide visually lossless compression.
NOTE: By default, the luma chroma offset is set to 2 whenever the simple (standard)
management scheme is selected.
VN-Matrix 200 Series • Advanced Setup Procedures 68