
BIT1612 10-Bit Digital Video Decoder with OSD and T-CON
36
IVREF
OVREF
t1
t2
R_IS_YS
R_IS_YW
R_DIS_YS
R_DIS_YW
Figure 6-22 Timing Adjustment VREF Information
6.26 Image Enhancement
BIT1612 提供多樣的調整機制,使用者可依據需求針對影像作調整,以獲得最佳之顯示效果。處理單元包括
Scaler 之前的前置處理與 Scaler 之後的後置處理兩部份。相關架構請參考下圖。
Broghtness Contast
Sharpness
Saturation
CTI
Brightness
Contrast
Gamma
Dither
DAC
Adjustment
Scaler
Pre-Image Enhancement
Post-Image Enhancement
Figure 6-23 Image Enhancement
6.26.1 Post-Processing Brightness and Contrast
BIT1612 針對 RGB Domain 的個別 Channel,分別提供 Brightness 和 Contrast 調整。其架構及相對
應設定如下所示。
Table 6-29 Color Adjustment Register
Mnemonic Address R/W Bits Description Default
R_BRIGHTNESS_R 0x07C[7:0] RW 8 R Channel Brightness Value 0x80
R_BRIGHTNESS_G 0x07D[7:0] RW 8 G Channel Brightness Value 0x80
R_BRIGHTNESS_B 0x07E[7:0] RW 8 B Channel Brightness Value 0x80
R_CONTRAST_R 0x07F[7:0] RW 8 R Channel Contrast Value 0x80
R_CONTRAST_G 0x080[7:0] RW 8 G Channel Contrast Value 0x80
R_CONTRAST_B 0x081[7:0] RW 8 B Channel Contrast Value 0x80
Contrast Adjust Type
0: Type 1
R_CONTRAST_TYPE 0x090[0] RW 1
1: Type 2
0
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