TW9910-NB2-GRT Datasheet, PDF (1/2 Pages) Intersil Corporation – NTSC/PAL/SECAMVideo Decoder for Portable Applications

Techwell
NTSC/PAL/SECAM Video Decoder for Portable Applications
TECHWELL
VIDEO
DECODERS
PRELIMINARY
Target Applications
Mobile Phone
Portable Media Player
Portable DVD player
Picture in Picture (PIP) decoder
DVD Recorder
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
Software selectable analog inputs allows any of
the following combinations, e.g. 4 CVBS or ( 3
CVBS and 1 Y/C ).
Built-in analog anti-aliasing filter
Two 9-bit ADCs and analog clamping circuit
Fully programmable static gain or automatic gain
control for the Y channel
Programmable white peak control for the Y
channel
Video Processing
4-H adaptive comb filter Y/C separation
PAL delay line for color phase error correction
Image enhancement with peaking and CTI
Digital sub-carrier PLL for accurate color
decoding
Digital Horizontal PLL for synchronization
processing and pixel sampling
Advanced synchronization processing and sync
detection for handling non-standard and weak
signal
Programmable hue, brightness, saturation,
contrast, and sharpness
Automatic color control and color killer
Chroma IF compensation
Detection of level of copy protection according
to Macrovision standard
Features
TW9910
Low Power NTSC/PAL/SECAM
Video Decoder with VBI Slicer
The TW9910 is a low power NTSC/PAL/SECAM video decoder chip that is
designed for portable applications. It consumes less than 100mW in typical
composite input application. The available power down mode further
reduces the power consumption. It uses the 1.8V for both analog and
digital supply voltage and 3.3V for I/O power. A single 27MHz crystal is all
that needed to decode all analog video standards.
The video decoder decodes the base-band analog CVBS or S-video signals
into digital 8 or 16-bit 4:2:2 YCbCr for output. It consists of analog front-
end with input source selection, variable gain amplifier and analog-to-
digital converters, Y/C separation circuit, multi-standard color decoder (PAL
BGHI, PAL M, PAL N, combination PAL N, NTSC M, NTSC 4.43 and SECAM)
and synchronization circuitry. The Y/C separation is done with high quality
adaptive 4H comb filter for reduced cross color and cross luminance. The
advanced synchronization processing circuitry can produce stable pictures
for non-standard signal as well as weak signal. A video scaler is provided to
arbitrarily scale down the output video in a packed format. The output of
the decoder is line-locked and formatted to the ITU-R 656 output with
embedded sync.
The TW9910 also includes circuits to detect and process vertical blanking
interval (VBI) signal. It slices and process VBI data for output through video
bus. Some information can also be alternatively retrieved through host
interface. It also detects copy-protected signal according to Macrovision
standard including AGC and colorstripe pulses.
A 2-wire serial host interface is used to simplify system integration. All the
functions can be controlled through this interface.
Block Diagram
NTSC/PAL
SECAM
Composite
S-Video
TV Tuner
601/
656
TW9910
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