TW2802 datasheet(11/80 Pages) ETC

Part #	TW2802

Description	TW2802/4 Multiple Video Decoder For Security Applications

PDF	80 Pages

Scroll/Zoom	100%

Manufacturer	ETC [List of Unclassifed Manufacturers]

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11 / 80 page

Preliminary

TW2804/TW2802 Multiple Video Decoder

Techwell, Inc.

www.techwellinc.com

Datasheet Rev. 2.4

09/09/2003

Y/C Separation

The adaptive comb filter is used for high quality luminance/chrominance separation from

NTSC/PAL composite video signals. The comb filter improves the luminance resolution and

reduces noise such as cross-luminance and cross-color. The adaptive algorithm eliminates

most of errors without introducing new artifacts or noise. To accommodate some viewing

preferences, additional chrominance trap filters are also available in the luminance path. Fig. 2

and Fig 3 show the frequency response of notch filter for each system NTSC and PAL.

x 10

-60

-50

-40

-30

-20

-10

Frequency (Hertz)

Fig. 2 The Characteristics of Luminance Notch Filter for NTSC

x 10

-60

-50

-40

-30

-20

-10

Frequency (Hertz)

Fig 3 The Characteristics of Luminance Notch Filter for PAL

TW2802 Datasheet(PDF) 11 Page - List of Unclassifed Manufacturers