STV3550 datasheet(30/144 Pages) STMICROELECTRONICS

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STV3550 データシート(PDF) 30 Page - STMicroelectronics

部品番号	STV3550

部品情報	LCD and Matrix Display TV Processor

PDF	144 Pages

Scroll/Zoom	100%

メーカー	STMICROELECTRONICS [STMicroelectronics]

ホームページ	http://www.st.com

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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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