msm7664 Oki Semiconductor, msm7664 Datasheet - Page 47

• Manufacturer Part Number: msm7664
• Description: Ntsc/pal Digital Video Decoder
• Manufacturer: Oki Semiconductor

Note:
Note:
Note:
¡ Semiconductor
Chrominance Control (CHRC)
Default
Recommended Value
CHRC[7]
CHRC[6:4]
CHRC[3]
CHRC[2]
CHRC[1:0]
Register Name
When in the output mode, U and V data can be averaged on the preceding and
following lines. At that time, when the level difference is set, averaging operation is
performed on each line taking the level as the threshold.
Control range while limiter is ON: 16 to 224
The color killer decision level is selected based upon color burst ratio.
Color-killer mode
U, V-filter threshold
C-Output level limiter
Chroma bandpass filter
Color kill threshold factor
CHRC[7] CHRC[6] CHRC[5] CHRC[4] CHRC[3] CHRC[2] CHRC[1] CHRC[0]
0
0
0
0
Write only
*000: Do not do avaraging.
001: Level difference 4
010: Level difference 8
011: Level difference 12
100: Level difference 16
101: Level difference 20
110: Level difference 24
111: Always do averaging.
*01: 0.250 color burst level
00: 0.500 color burst level
10: 0.125 color burst level
11: Color killer off
0
0
*0: Preset always the color killer to OFF at the top
*0: OFF
*1: ON
1: Maintain the previous field status when the
1: ON
0: OFF
of field.
device is in an out-of-synchronization state at
tha top of field.
Setting of U/V averaging processing
0
0
<address: $0B>
0
0
1
1
PEDL7664-01
0
0
MSM7664
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1