Vcj Video/Color Signal Path - Mitsubishi V19-V21 Tehnical Manual

Figure 5 illustrates the Sub Picture YCbCr Select
Circuitry. Sub picture NTSC signal is converted to
the YCbCr format in the Sub Decoder, IC2H00. The
output of IC2H00 is applied to IC2B00. Signals from
the COMP-1, COMP-2 and DTV Inputs are also
applied to IC2B00.
The outputs of IC2B00 are directed to the sub pic-
ture inputs of the 2HDW circuitry. If the format is
not 480i that signal will not be accepted by the 2HDW
circuitry.
YCbCr Select Control
Both the Main YCbCr Select (IC2A00) and Sub
YCbCr Select (IC2B00) are Controlled by the SDA-
MN data line. The SCL-MN clock line provides tim-
ing for data transfer. The internal circuitry of the
ICs detects the format of the selected signals and in-
forms the TV Control µPC of that format, via the SDA-
2
MN I C Data line.

VCJ Video/Color Signal Path

Figure 7-6 shows the Video/Color Signal Path in the
VCJ, IC2V00. Main picture signal inputs are:
• Pins 67-69 ... 480i line doubled inputs.
• Pins 3-5 ... 480p and 1080i analog inputs.
• Pins 15-17 ... DM RGB inputs.
DM-RGB signals are converted to YCbCr in the VCJ.
Internal Switch circuitry selects Analog 480p/1080i
or DM YCbCr, and outputs the signals at pins 76-
78. This signals are directed back to pins 73-75 of
the VCJ.
7-6