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STV3550 Datasheet(PDF) 30 Page - STMicroelectronics

No. de pieza STV3550
Descripción Electrónicos  LCD and Matrix Display TV Processor
PDF  144 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STV3550 Datasheet(HTML) 30 Page - STMicroelectronics

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STV3550
Table 9 shows the relation between the gain parameter and the gain factor values.
3.3.6.1 Black Stretch
The Black Stretch algorithm is used to decrease the black part under the average brightness point.
The inflection point is based on the average brightness, but another value can be set by user. The
range and gain parameters are used to set the correction slope value.
This filter can be used when the overall picture is bright in order to improve the overall contrast.
Figure 18 shows samples of the black stretch algorithm with an average brightness of 128 with
various gain and range values.
Table 9: Gain Factor
Gain Parameter
Gain Factor
00.500
10.750
20.825
31.000
41.125
51.500
61.750
72.000
Figure 18: Black Stretch



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