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Circuit Descriptions
7.
7.4.2
Front-End ISDB Reception DTV part
The Front-End for DVT part consist of the following key
components:
•
Silicon Tuner MxL661-AG-R
•
SCALER MT5561LVNT/B PBGA-329
•
DEMODULATOR TC90537FG LQFP-48
Below find a block diagram of the front-end application for DTV
part.
Figure 7-7 Front-End ISDB DTV block diagram
7.5
HDMI
Refer to figure
for the application.
Figure 7-8 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
•
HDMI 2: HDMI input ( TV digital interface support HDCP)
with digital audio/PC DVI input/ARC
•
+5V detection mechanism
•
Stable clock detection mechanism
•
Integrated EDID
•
HPD control
•
CEC control
7.6
Video and Audio Processing - MT5561LVNT
The MT5561LVNT is the main audio and video processor (or
System-on-Chip) for this platform. It has the following features:
•
Powerful CPU core
•
A transport de-multiplexer
•
A muti-standard video decoder
•
Rich format audio codec
•
HDMI 1.4a receiver with 3D support
•
2D/3D converter
•
Local dimming (LED backlight) (option)
•
Panel overdrive control
•
Two-link LVDS
The MT5561LVNT combines front-end video processing
functions, support NTSC/PAL/SECAM TV decoder with a 3D
comb filter (NTSC/PAL). The MT5561LVNT 2Gb enables
consumer electronics manufacturers to build high quality, low cost
and feature-rich DTV. The MT5561LVNT 2Gb supports Full-HD
MPEG1/2/4/h.264/DiviX/VC1/RM/AVS/VP8 (option) video
decoder standards, and JPEG. The MT5561LVNT 2Gb also
supports MediaTek MDDi
TM
de-interlace solution which can
reach very smooth picture quality for motions. A 3D comb filter
added to the TV decoder recovers great details for still pictures.
The special color processing technology provides a natural,
deep colors and true studio quality video. Moreover, the
MT5561LVNT 2Gb family has built-in high resolution and
high-quality audio codec.
For a functional diagram of the MT5561LVNT, refer to
IF
T
S
DA
T
A
RF_AGC
MT5561
TC90537FG
LQFP-48
IF_AGC
MxL661-AG-R
I
2
C
I
2
C
I
2
C
Demod
20010_204.eps
20010_205.eps
MT5561
HDMI1
CN501
RX
I
2
C
HDMI2
CN502
RX
I
2
C