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TDA9170 Datasheet

  • TDA9170

  • YUV picture improvement processor based on histogram modific...

  • 323.29KB

  • 22頁

  • PHILIPS

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Philips Semiconductors
Preliminary speci鏗乧ation
YUV picture improvement processor based
on histogram modi鏗乧ation
FEATURES
鈥?/div>
Picture content dependent non-linear Y and U, V
processing by histogram analysis
鈥?/div>
Adaptive and variable gamma correction controls
鈥?/div>
Black and white stretch capabilities
鈥?/div>
Transparent I
2
C-bus control
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On-chip window generator for valid histogram
measurement and black detection.
GENERAL DESCRIPTION
The TDA9170 is a transparent analog video processor
with a YUV interface. It offers three main luminance
processing functions any combination of which can be
selected.
The luminance transfer is controlled in a non-linear
manner 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 picture will be improved.
ORDERING INFORMATION
PACKAGE
TYPE NUMBER
NAME
TDA9170
SDIP32
DESCRIPTION
plastic shrink in-line package; 32 leads (400 mil)
TDA9170
Black restoration is available in the event of a set-up in the
luminance signal. A variable gamma function, after the
histogram conversion, offers the possibility of excellent
brightness control.
To maintain a proper colour reproduction, the saturation of
the U and V colour difference signals are controlled as a
function of the actual non-linearity in the luminance
channel.
The TDA9170 concept has maximum flexibility with the
optional on-board I
2
C-bus (including hardwired address
select) and window control. The supply voltage is 8 V. The
device is mounted in a 32 pin SDIP envelope.
VERSION
SOT232-1
October 1994
2

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