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Techwell
Techwell
NTSC/PAL/SECAM Video Decoder for Multimedia ApplicationsNTSC/PAL/SECAM Video Decoder for Multimedia Applications
TECHWELL
VIDEO
DECODERS
TW9909TW9909
6x10-bit Multi-Standard Comb Filter Video Decoder
with SCART and RGB Mixing Support
* Pin to Pin with TW9906
6x10-bit Multi-Standard Comb Filter Video Decoder
with SCART and RGB Mixing Support
* Pin to Pin with TW9906
Target Applications
Analog Video Decoder
NTSC (M, 4.43) and PAL (B, D, G, H, I, M, N, N
combination), PAL (60), SECAM support with
automatic format detection
Advanced synchronization processing for VCR
fast forward, backward, and pause mode
Software selectable 14 analog input terminals
allow maximum flexibility:
Up to five composite, or two S-Video or two
Up to two SCART RGB inputs with FB.
Six 10-bit ADCs with analog clamping circuit
and anti-aliasing filter
Fully programmable static gain or automatic
gain control for the Y and G(Y) channel
Programmable white peak control for the Y
channel
High quality RGB/YCbCr mixing by Fast
Blanking signal
CRT, LCD, PDP and Projection TV
Multifunction LCD Monitor (Monitor TV)
DVD-Recorder
PC TV Capture Card
YCbCr inputs
Techwell's TW9909 is a high quality NTSC/PAL/SECAM video decoder that
is designed for multimedia applications. It uses the mixed-signal 2.5V/3.3V
CMOS technology to provide a low-power integrated solution.
The TW9909 analog front-end is equipped with six separate analog
channels that enable it to accept various analog video input standard
including Composite video, S-video, component video (YCbCr), and SCART
RGB. With the analog FB support, it also allows the mixing of composite or
S-video input with YCbCr/RGB input. All channels include an analog
multiplexer (MUX) for maximum flexibility in software controlled input
selection. It is possible to connect up to five composite inputs or two S-
video inputs or two YCbCr inputs or two SCART RGB inputs at one time and
allow the software to switch between them. Alternatively, a maximum
combination of five of these inputs may be switched under software
control. In the PIP mode, a maximum combination of four composite/S-
video inputs can be mixed with any of two YCbCr/RGB inputs through
The front-end contains all the necessary circuits to simplify the system
design. The built-in six high quality 10-bit analog-to-digital converters
(ADCs) convert inputs into digital signals for processing.
The TW9909 uses proprietary adaptive 4H comb filter for chroma and luma
separation to achieve high video quality.The image enhancement includes
The advanced synchronization processing can produce stable pictures for
non-standard signal such as those produced by VCR trick mode.
The high quality scaler uses multi-tap poly-phase decimation filter to
accurately scale down the image with minimum phase error. It can be
programmed to scale-down the output picture to an arbitrary ratio with
The TW9909 supports flexible pixel interface. It outputs YCbCr (4:2:2) data
stream over 10-bit or 20-bit data path. It also supports both free-running
A 2-wire serial MPU interface is used to simplify system integration. All the
external FB control.
horizontal and vertical peaking, CTI and BCS control.
cropping.
clock and line-locked clock output.
functions can be controlled through this interface.
Techwell
NTSC/PAL/SECAM Video Decoder for Multimedia ApplicationsNTSC/PAL/SECAM Video Decoder for Multimedia Applications
9099WT 9099WT
6x10-bit Multi-Standard Comb Filter Video Decoder
with SCART and RGB Mixing Support
* Pin to Pin with TW9906
6x10-bit Multi-Standard Comb Filter Video Decoder
with SCART and RGB Mixing Support
* Pin to Pin with TW9906
TW9909 Block Diagram
Miscellaneous
Two wire MPU serial bus interface
Power-down mode
Typical power consumption 0.4W
Single 27MHz crystal for all standards
Supports 24.54MHz and 29.5MHz crystal for
high quality square pixel format
3.3V / 5V tolerant I/O
2.5V / 3.3V Power Supply
80 pin TQPF package
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Video Processing
Adaptive 4H comb filter for the best image
quality
PAL delay line for color phase error correction
Digital sub-carrier PLL for accurate color
decoding
Digital Horizontal PLL and advanced
synchronization processing for non-standard
video signals
Programmable hue, brightness, saturation,
contrast, and sharpness
Blue stretch
Image enhancement with 2D peaking and CTI
Automatic color control and color killer
IF compensation filter
Detection of level of copy protection
according to Macrovision standard
YCbCr input supports 480i/576i and sub-
sampled 480p/576p with auto-detection
Video Output
Supports both free-running and line-locked clock outputs
Programmable output cropping
High quality horizontal filtered scaling with arbitrary scale down
ratio
VMI 1.4 compatible 10-bit or 20-bit pixel interface
ITU-R 601 or ITU-R 656 compatible output YCbCr(4:2:2) output
format
VBI slicer supporting industrial standard data services with data
packet filter capability
Built-in VBI FIFO for convenient access through host interface
VBI data pass through, raw ADC data for Intercast™
Field locked audio clock generator
Audio
Clock
A
LRCLK
Analo
g
Video In
4-H adaptive
comb filter
Y/C separation
Chroma
Demodulation
Luma/Chroma
processor
S
y
nc
Video out
p
ut Interface
VBI Slicer
VBI FIFO
2Wire
Serial
Bus
MUX0
DVALID
FIELD
HSYNC
VSYNC
MPOUT
VD
(
19:0
)
SCLK
SDAT
SIAD0
U
V
MUX3
H/V Down
Scaler/Cropping
YBOUT
VBI Pass
through
Clock
27 Mhz PDN
CLKX2
CLKX1
Y
A
MXCLK
A
MCLK
A
SCLK
INTREQ
CIN
(
1
)
CIN
(
0
)
MUX
AGC/Cla
10-bit
ADC
Filter
Anti-alias
Filter
Anti-alias
Filter
MUX
10-bit
ADC
Clam
p
Line-lock
clock
Generator
Contrast
Saturation
Brightness
Tint
SOFT MIXER
FB
Y
Cb
Cr
10-bit ADCs
MUXs
C
l
a
m
p
Filter
Anti-alias Filter
Color Matrix
Filter
RIN (0)
RIN (1)
GIN (0)
GIN (1)
BIN (0)
BIN (1)
FB (0)
FB (1)
