參數(shù)資料
型號: TVP70025IPZP
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費(fèi)家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP100
封裝: GREEN, PLASTIC, HTQFP-100
文件頁數(shù): 8/59頁
文件大小: 519K
代理商: TVP70025IPZP
SLES232B
– JUNE 2008 – REVISED MAY 2011
RGB-to-YCbCr Color Space Conversion
The TVP70025I supports RGB-to-YCbCr color space conversion (CSC) with I2C programmable coefficients. The
TVP70025I should default to the CSC coefficients required for HDTV component video inputs. The TVP70025I
supports the ability to bypass the CSC block and defaults to the bypass mode (bit 3of subaddress 23h).
RGB-to-YCbCr
CSC
coefficients
for
HDTV
component
video
(see
CEA-770.3-C,
ITU-R
BT.709)
(default coefficients):
G
'
B
'
R
'
Y
00000016E3
000000024F
00000006CE
Pb
FFFFFFF3AB
0000001000
FFFFFFFC55
Pr
FFFFFFF178
FFFFFFFE88
0000001000
RGB-to-YCbCr
CSC
coefficients
for
SDTV
component
video
(see
CEA-770.2-C,
ITU-R
BT.601)
(informative only):
G
'
B
'
R
'
Y
00000012C9
00000003A6
0000000991
Pb
FFFFFFF566
0000001000
FFFFFFFA9A
Pr
FFFFFFF29A
FFFFFFFD66
0000001000
4:4:4 to 4:2:2 Conversion
For 4:4:4 YPbPr component video inputs, the TVP70025I can downsample the chroma samples (CbCr) from 1
×
to 0.5
× using a 27-tap half-band filter.
NOTE
Selection between the 30-bit 4:4:4 output format and the 20-bit 4:2:2 output format is made using
bit 1 of register 15h.
Multiplexed CbCr data is output on BOUT [9:0] in the 20-bit 4:2:2 output format.
4:4:4 to 4:2:2 conversion is implemented after RGB-to-YCbCr color space conversion.
16
Copyright
2008–2011, Texas Instruments Incorporated
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