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9-2-2 Input signal introduce
1. VIDEO: transmit bright & chroma signal , it is general ,its picture quality is equal to the general
VCD.S-VIDEO transmit the bright and the chroma single, and can reduce/control the cross-interfere , it
is better than the Video.
2. RGB&D-SUB(Pc interface ): general RGB simulative input interface .
3. YCbCr(NTSC/PAL): is composed of one bright and two chromatism signals U/V. due to the eye is
more sensitive for bright than chroma , RGB via the formulae Y=0.39R+0.50G+0.11B to transform into
one bright and two chromatism signals U(R-Y), V(B-Y).
4. VIDEO、S-VIDEO、YCBCR: the frequency 15.6KHZ 50(PAL)/60HZ(NTSC), interleaved simulative
signal.
5. YPbPr: non-interlaced signal, belong to DTV scope, support 480P,720P,1080i format, current is
NTSC.
6. DVI：digital Visual Interface, has 29pin（DVI-I）and 25pin (DVI-D), now many top grade display card
own it.
9-3 TUNER board block diagram
TUNER BOARD
SCL
SDA
MainTV
PipTV
SCART2/3-RGBVFA
SCART1-RGBVFA
S1_Y
TEA6415
S2_Y
S3_Y
SW6
SW7
SW8
8V_AU
5V_SB
SW11
SW1
SW2
SCART1
L
S
R
V
MainTV
AV_TV
PipTV
SCART1_VOUT
MSP3450
74LV4052
CVBS_OUT
CN670
SCART2
Earphone
Page 51 of 99
SP CON
TA2024
TL072CD
QS3257
QS3257
SCART3
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