Video Signal Processing - Panasonic TC-26LX20 Technical Manual

Video Signal Processing

All NTSC video signals are converted to digital data by the analog to digital (A/D)
converter circuit located inside the Global Core IC, IC4011. The comb filter in IC40
converts the composite video signal of the main picture to Y and C separated vide
data. The S-Video signal, which is already Y/C separated, by
Chroma information is then applied to the Chroma Demodulator circuit that separates
the color signal into PB and PR data.
The Component inputs, which are already Y/C, separated; are converted to digita
bypass the comb filter section of this IC4011. The 480p
simply pass through the IC (which IC) and are output to the main global core IC,
IC4011.
Interlace to progressive (I/P) conversion for the 480i video format is accomplished via
the Video Signaling Processing IC, IC4010, and SDRAM IC4018 which serves as a
temporary buffer during the interlaced to pr
Sig nal Processing IC is responsible for Pixel conversion, White Balance, Aspect Ratio
I/P con version, Image resizing and LCD Panel control.
ogressive conversion process. The Video
Video Signal Flow
Figure 26
29
passes the comb filter. The
and 1080i ATSC Video signals
11
o
l and