bt829bkrf ETC-unknow, bt829bkrf Datasheet - Page 99

• Manufacturer Part Number: bt829bkrf
• Description: Video Streamii Decoders
• Manufacturer: ETC-unknow

Bt829B
VideoStream II Decoders
0x0D—Chroma (U) Gain Register, Lower Byte (SAT_U_LO)
This control register may be written to or read by the MPU at any time. Upon reset, it is initialized to 0xFE.
SAT_U_LO(0) is the LSB. SAT_U_MSB in the CONTROL register and SAT_U_LO concatenate to give a 9-bit
register (SAT_U). This register is used to add a gain adjustment to the U component of the video signal. By
adjusting the U and V color components of the video stream by the same amount, the saturation is adjusted. For
normal saturation adjustment, the gain in both the color difference paths must be the same (i.e., the ratio
between the value in the U gain register and the value in the V gain register should be kept constant at the
default power-up ratio). When changing the saturation, if the SAT_U_MSB bit is altered, care must be taken to
ensure that the other bits in the CONTROL register are not affected.
SAT_U_LO
7
1
6
1
Decimal Value
511
510
255
254
128
1
0
.
.
.
.
.
.
5
1
4
1
SAT_U_LO
D829BDSA
Hex Value
0x0D—Chroma (U) Gain Register, Lower Byte (SAT_U_LO)
0x1FE
0x0FE
0x080
0x001
0x000
0x1FF
0x0FF
3
1
.
.
.
.
.
.
2
1
4.0 Control Register Definitions
% of Original Signal
1
1
201.18%
200.79%
100.39%
100.00%
50.39%
0.39%
0.00%
.
.
.
.
.
.
0
0
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