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TW2866 Datasheet Preview

TW2866 Datasheet

4-Channel Video Decoders and Audio Codecs and Video Encoder

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TW2866 pdf
TW2866
4-Channel Video Decoders and Audio Codecs and
Video Encoder For Security Application
Preliminary Data Sheet from Techwell, Inc.
Information may change without notice
Disclaimer
This document provides technical information for the user. Techwell Inc. reserves the right to
modify the information in this document as necessary. The customer should make sure that
they have the most recent data sheet version. Techwell Inc. holds no responsibility for any
errors that may appear in this document. Customers should take appropriate action to ensure
their use of the products does not infringe upon any patents. Techwell Inc. respects valid
patent rights of third parties and does not infringe upon or assist others to infringe upon such
rights.
Techwell, Inc.
www.techwellinc.com
1
07/30/2009
Datasheet Rev. 0.1



Techwell
Techwell

TW2866 Datasheet Preview

TW2866 Datasheet

4-Channel Video Decoders and Audio Codecs and Video Encoder

No Preview Available !

TW2866 pdf
TW2866
4-Channel Video Decoders and Audio Codecs and
Video Encoder for Security Application
Table of Contents
Introduction ..........................................................................................................................................9
Features ............................................................................................................................................9
Block Diagram ...............................................................................................................................10
Pin Diagram ...................................................................................................................................11
Pin Description...............................................................................................................................12
Functional Description.......................................................................................................................15
Video Input Formats .....................................................................................................................15
Analog Frontend ............................................................................................................................16
Decimation Filter .........................................................................................................................17
Automatic Gain Control and Clamping .......................................................................................18
Sync Processing..............................................................................................................................18
Y/C Separation...............................................................................................................................19
Color Decoding ..............................................................................................................................20
Chrominance Demodulation ........................................................................................................20
ACC (Automatic Color gain control) ...........................................................................................21
Chrominance Processing ...............................................................................................................21
Chrominance Gain, Offset and Hue Adjustment ..........................................................................21
CTI (Color Transient Improvement) ............................................................................................21
Luminance Processing ...................................................................................................................22
Video Cropping..............................................................................................................................23
Video Scaler ...................................................................................................................................24
Output Format ...............................................................................................................................27
ITU-R BT.656 Format .................................................................................................................27
Two Channel ITU-R BT.656 Time-multiplexed Format with 54MHz..........................................28
Four Channel CIF Time-multiplexed Format with 54MHz ..........................................................29
Four Channel D1 Time-division-multiplexed Format with 108MHz............................................31
Output Enabling Act ....................................................................................................................33
Video Output Channel Selection ..................................................................................................33
Extra Sync Output........................................................................................................................33
Video Encoder................................................................................................................................36
Audio Codec ...................................................................................................................................39
Techwell, Inc.
www.techwellinc.com
2
07/30/2009
Datasheet Rev. 0.1


Part Number TW2866
Description 4-Channel Video Decoders and Audio Codecs and Video Encoder
Maker Techwell
Total Page 30 Pages
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