Circuit Descriptions
7.
Figure 7-4 Front-End DVB-T/C DTV block diagram
7.4.2
DVB-T2 reception
The Front-End for DVB-T2 DTV part consist of the following
key components:
•
TUNER EUROPE
DTOS40CIL034B
•
SCALER NT
72666BG-BA/D HS-PBGA-1135
•
DEMODULATOR NT78822QG/A QFN-48 for DVB-T2
DTV part
Below find a block diagram of the front-end application for
DVB-T2 DTV part.
Figure 7-5 Front-End DVB-T2 DTV block diagram
7.5
Front-End DVB-S(2) reception
The Front-End for the DVB-S(2) application consist of the
following key components:
•
TUNER EUROPE
TDQS-A751F for K
•
SCALER
NT78822QG/A QFN-48
•
SCALER NT72666BG-BA/D HS-PBGA-1135
Below find a block diagram of the front-end application for
DVB-S(2) reception.
Figure 7-6 Front-End DVB-S2 DTV block diagram
The application supports the following protocols:
•
Polarization selection via supply voltage ( 18V = horizontal,
13V = vertical)
•
Band selection via “toneburst” (22kHz): tone “on” = “high”
band, tone “off” = “low” band
•
Satellite ( LNB) selection via DiSEqC 2.0 protocol
•
Reception of DVB-S ( supporting QPSK encoded signals)
and DVB-S2 ( supporting QPSK, 8PSK encoded signals)
7.6
HDMI
Refer to figure
for the application.
Figure 7-7 HDMI input configuration
The following HDMI connector can be used:
•
HDMI 1: HDMI input ( TV digital interface support HDCP)
with digital audio/PC DVI input/ARC
•
HDMI 2: HDMI input ( TV digital interface support HDCP)
with digital audio/PC DVI input
•
+5V detection mechanism
•
Stable clock detection mechanism
•
HPD control
•
Sync detection
•
TMDS output control
•
CEC control
7.7
Video and Audio Processing -
NT72666MBG-BA
The NT72666 is the main audio and video processor (or
System-on-Chip) for this platform. It has the following features:
•
Support pixel format YUV420 only for all video codec
except JPEG
•
H.264 Constrained Baseline/Main/High Profiles @
4K2Kp30(Level 5.0 and Level 5.1 under limited bit-rate)
•
MVC Stereo High Profile @ 1080p60
IF_AGC
IF
NT72666
IF_AGC
DTOS40CIL034B
I
2
C
I
2
C
19970_203.eps
IF
T
S
DA
T
A
RF_AGC
NT72666
Demod
NT78822
IF_AGC
DTOS40CIL034B
I
2
C
IF-AGC
I
2
C
I
2
C
19970_204.eps
TS DATA
IP/IN/OP/ON
Tuner I2C
Tuner I2C
System I2C
NT72466
LNB power
NT78822QG/A
S2 tuner
S2 function
19970_205.eps
19970_206.eps
NT72666
HDMI1
HDMI 2
CN501
CN502
RX
RX
I
2
C
I
2
C
