Scanline
O
ff
The two polyphase modes utilize the RT5X’s vertical scaler to
generate scanline e
ff
ects that can work at both integer and
non-integer scaling factors with a “soft” gradual darkening of
the lines.
The Integer mode provides a sharp darkening of the lines and
only renders correctly for modes that use an integer vertical
scaling factor.
Polyphase 50%
Polyphase 90%
Integer
Vertical Sync
Triple Bu
ff
er
The RT5X has two modes for generating the output video
timing. Triple bu
ff
er uses a full frame memory and an externally
derived clock to maintain a constant 60 frames/sec. The lag
varies between approx. 0.25 to 1.25 frames in this mode.
Triple bu
ff
er o
ff
ers the highest compatibility across all
equipment and immunity against sync loss/resolution changes
at the expense of increased lag and occasional judder due to
the need to repeat/drop frames.
Frame lock utilizes the video ADC and console as the base
clock. The output frame rate follows the original console
exactly with a fixed lag of approx. 0.25 frames. Frame lock
may not be compatible with some TVs and capture cards,
depending on the console’s frame rate.
Frame lock is automatically engaged for 480p, 576p, 720p and
1080i sources since they derive from modern equipment that
generally follow standard refresh rates.
Frame Lock
Deinterlacer
Motion Adaptive
The RT5X’s FPGA is capable of multiple high-quality and
advanced deinterlacing modes to produce flicker-free and low-
artifact video from 480i and 576i content.
Motion adaptive analyzes the video on a pixel by pixel basis to
intelligently blend weave and bob modes together based on
the video content.
Weave stitches the odd and even fields together, which results
in extremely sharp images for still content but “teething”
Weave
Blend
Bob
Linear
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