TW9919 Intersil Corporation, TW9919 Datasheet

TW9919

Manufacturer Part Number

TW9919

Description

Manufacturer

Intersil Corporation

Datasheet

1.TW9919.pdf (2 pages)

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NTSC/PAL/SECAM Video Decoder for Multimedia Applications

Target Applications

Analog Video Decoder

CRT, LCD, PDP and Projection TV

Multifunction LCD Monitor (Monitor TV)

DVD-Recorder

PC TV Capture Card

CCTV Digital Video Recorder

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:

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

Up to five composite, or two S-Video or two

YCbCr inputs

Up to two SCART RGB inputs with FB.

Techwell

www.techwellinc.com

Techwell's TW9919 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 TW9919 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 input can be mixed with any of two YCbCr/RGB inputs through

external FB control.

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)

The TW9919 uses proprietary adaptive 3D comb filter to achieve best NTSC

and PAL quality fpr stationary portion. For motion part of the image, it

employs 2H(NTSC)/4H(PAL) comb filter for chroma and luma separation to

achieve high video quality. The image enhancement includes horizontal

and vertical peaking, CTI and BCS control.

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

cropping.

The TW9919 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

clock and line-locked clock output.

A 2-wire serial MPU interface is used to simplify system integration. All the

functions can be controlled through this interface.

Features

convert

6x10-bit Multi-Standard 3D Comb Filter Video Decoder

inputs

into

with SCART and RGB Mixing Support

digital

DECODERS

TECHWELL

signals

VIDEO

TW9919

for

processing.

Related parts for TW9919

TW9919 Summary of contents

Page 1

... The TW9919 uses proprietary adaptive 3D comb filter to achieve best NTSC and PAL quality fpr stationary portion. For motion part of the image, it employs 2H(NTSC)/4H(PAL) comb filter for chroma and luma separation to achieve high video quality. The image enhancement includes horizontal and vertical peaking, CTI and BCS control ...

Page 2

... NTSC/PAL/SECAM Video Decoder for Multimedia Applications NTSC/PAL/SECAM Video Decoder for Multimedia Applications TW9919 Block Diagram Y RGB/YCrCb1 Cb RGB/YCrCb0 Cr FB1 CIN1 Cb CIN0 Y/C Cr MUX0 MUX1 MUX2 MUX3 MUX4 Memory controller MUX5 YBFOUT 27 Mhz SIAD SCLK SDA SDRAM Video Output Supports both free-running and line-locked clock outputs ...

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