Zoom V3 1612 Bedienungsanleitung Seite 57

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BIT1612 10-Bit Digital Video Decoder with OSD and T-CON
47
6.28.8 Chroma Process
Anti-
Filter
Demodulator
Sub-
Carrier
Generator
Low-
Pass
Filter
Chroma-
Gain
Processing
SECAM
Processing
Color
Standard
Detector
Comb
Filter
UOUT
VOUT
CIN
Color
Standard
Figure 6-30 Chroma Process Function Block
Table 6-48 Chroma Process Register
Mnemonic Address R/W Bits Description Default
Chroma Fixed-Gain Value
000000: Minimum Gain (0.25)
010000: Normal Gain (1.0)
R_CHROMA_GAIN 0x0C7[6:0] RW 7
111111: Maximum Gain (3.5)
0x21
Chroma Gain Type Selection
0: Auto-Gain
R_CHROMA_GAIN_SEL 0x0C7[7] RW 1
1: Fixed-Gain (Defined on 0x609[6:0])
0
R_GAIN_CTL_VALUE
0x0C9[0],
0x0C8[7:0]
RW 9 Chroma Gain Reference Value 0x100
Auto Color Kill From Color Detection
0: Disable
R_AUTO_KILL 0x0C9[1] RW 1
1: Enable (Auto Kill from Color Detection)
0
TV / VCR Mode Selection
0: Mode 1
R_CDV_SEL 0x0C9[2] RW 1
1: Mode 2
0
CCIR Mode
0: Disable
R_CCIR_EN 0x0C9[3] RW 1
1: Enable
0
Auto Chroma Gain Loop Filter
00: Slow Time Constant
01: Medium Time Constant
10: Fast Time Constant
R_GAIN_CTRL_SPEED 0x0C9[5:4] RW 2
11: Frozen
00
SECAM Invert Enable
0: Disable
R_SECAM_INVERT 0x0C9[6] RW 1
1: Enable
0
SECAM Cross Color Reduction
0: Disable
R_SXCR 0x0C9[7] RW 1
1: Enable
1
R_THRESHOLD_SECAM 0x0CA[7:0] RW 8 Color Killer Threshold for SECAM 0x80
R_THRESHOLD_QAM 0x0CB[7:0] RW 8 Color Killer Threshold for PAL and NTSC 0x80
R_SECAM_SENSITIVE 0x0CC[7:0] RW 8 SECAM Switch Sensitive Level 0x50
R_PAL_SENSITIVE 0x0CD[7:0] RW 8 PAL Switch Sensitive Level 0x50
R_LOWER_BOUND 0x0CE[3:0] RW 4 Color Standard Detection Threshold 1 0x4
R_UPPER_BOUND 0x0CE[7:4] RW 4 Color Standard Detection Threshold 2 0xC
R_CHROMA_LPPI1 0x0CF[1:0] RW 2 Chroma Low Pass Filter Factor 1 01
R_CHROMA_LPPI2 0x0CF[3:2] RW 2 Chroma Low Pass Filter Factor 2 10
R_SQP_LMT 0x0CF[4] RW 1 Sub-Carrier Frequency Selection 0
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