TDA9171 Просмотр технического описания (PDF) - Philips Electronics

Номер в каталоге

Компоненты Описание

Список матч

TDA9171

YUV picture improvement processor based on histogram modification and blue stretch

Philips Electronics 

Philips Semiconductors

YUV picture improvement processor based

on histogram modification and blue stretch

Preliminary specification

TDA9171

FEATURES

• Picture content dependent non-linear Y and U,V

processing by luminance histogram analysis

• TV standard independent

• Incredible blue stretch

• Optional YC-processing.

GENERAL DESCRIPTION

The TDA9171 is a transparent analog video processor

with YUV input and output interfaces.

The luminance transfer is controlled in a non-linear way by

the distribution, in 5 discrete histogram sections, of the

luminance values measured in a picture. As a result, the

contrast ratio of the most important parts of the scene will

be improved.

So as to maintain a proper colour reproduction the

saturation of the −U and −V colour difference signals are

also controlled as a function of the actual non-linearity in

the luminance channel.

Optionally, the YUV blue stretch circuitry can be activated

which offsets colours near white towards blue.

The supply voltage is 8 V.

The device is contained in a 20 lead dual in-line package.

QUICK REFERENCE DATA

SYMBOL

VCC

supply voltage

PARAMETER

MIN.

7.2

TYP.

−

MAX.

8.8

UNIT

V

ORDERING INFORMATION

TYPE

NUMBER

TDA9171

NAME

DIP20

PACKAGE

DESCRIPTION

plastic dual in-line package; 20 leads; (300 mil); no heat spreader

VERSION

SOT146-1

1996 Jun 17

2

Share Link: