22
4.8.2.
Clock/Position
For analogue graphics inputs only, clock auto fit can be selected to automatically adjust the frequency
and phase of the sampling clock. This automatic adjustment is strongly recommended. The clock phase
and frequency can also be adjusted manually if needed.
4.8.3.
Input Capture
Overscan
Select the amount of overscan, effectively up-scaling the image slightly. Maximum overscan is 10%,
minimum is 0%.
Input Window Shift
Allows horizontal and vertical adjustment of the captured active image area within the overall display
resolution. Note: The range of position adjustment available is limited by the characteristics of the
signal timings from the image source equipment.
The input window shift function should only ever be used to correct input capture discrepancies.
4.8.4.
Input Features
The input feature menu provides three image enhancement functions.
Sharpness
Control of the sharpening enhancement. These are peaking filters to improve high-frequency response.
Note: setting this control too high on a signal which already has good high frequency response will
cause ringing or ghosting.
Detail Enhance
Provides an additional level of detail enhancement beyond that provided by the Unsharp Mask
Unsharp Mask
This is a very powerful function which performs a per-pixel unsharp mask on the image content. It can
be used to greatly improve detail definition and clarity without causing image ringing or ghosting. It
improves both horizontal and vertical detail.
Correct setting of the Unsharp Mask filter can make SD signals look virtually indistinguishable from true
HD.
4.8.5.
Aspect Ratio
AFD Mode
Video signal streams may include information describing the transmitted format (HDMI: AVInfoFrames,
Composite NTSC/PAL: WSS/CGMS-A, 3GSDI: Generic SMPTE2016). The AFD signal (Active Format
Description) is automatically considered by SP-14 when AFD Mode is set to Auto. Essentially, this
feature switches on the detection of the aspect ratio of the incoming video signal. The ARC (Aspect
Ratio Conversion) settings in the Output Settings menu determine how this information is processed.
The AFD Mode can be set to Forced, in which case the AFD markers are ignored and the aspect ratio is
said to be what is set under the menu item AFD Default/Forced, whether or not that is actually the case.
AFD Default/Forced
When the AFD information is missing or corrupted or when AFD Mode is set to Forced this menu
determines what aspect ratio the input signal is assumed to have for further processing.
If it is set to 16:9 or 4:3 the incoming video signal is considered to have that aspect ratio.
Keep Last means use whatever was seen before. If nothing was seen before use 4:3 for SD modes and
16:9 for HD modes.
AFD Source
From this menu AFD, WSS/CGMS-A or Video Index may be selected as AFD source. The sources for
aspect ratio information for the input channels are as follows:
HDMI: From the AVInfoFrames (see CEA-861-D)
Содержание SP-14
Страница 1: ...SIERRA VIDEO SYSTEMS SP 14 User s Manual...
Страница 2: ...2 SP 14 Operating Instructions Version K 1 4...
