Figure 3 shows a typical application using a DSP to produce a video overlay (such as a
logo or menu text). The parallel digital video output is sent to the DSP, which adds the
overlay. The digital video with the overlay is then looped back into the MT9V135 to the
NTSC/PAL encoder and LVDS formatter to provide simultaneous composite analog and
digital LVDS outputs.
Figure 3:
Typical Usage Configuration with Overlay
NTSC/PAL c
NTSC/PAL composite analog output with overlay
D
IN
_CLK
D
IN
[7:0]
PIXCLK
MT9V135
D
OUT
[7:0]
Parallel
digital
(CCIR 656)
27MHz
Oscillator
DSP
Parallel
digital
signal with
overlay
(CCIR 656)
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