參數(shù)資料
型號(hào): SAF7118H
廠商: NXP Semiconductors N.V.
元件分類: 通用總線功能
英文描述: Multistandard video decoder with adaptive comb filter and component video input
封裝: SAF7118EH/V1<SOT807-1 (HBGA156)|<<http://www.nxp.com/packages/SOT807-1.html<1<,;SAF7118EH/V1<SOT807-1 (HBGA156)|<<http://www.nxp.com/packages/SOT807-1.html<1<,;
文件頁數(shù): 170/175頁
文件大?。?/td> 898K
代理商: SAF7118H
SAF7118_4
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 04 — 4 July 2008
170 of 175
NXP Semiconductors
SAF7118
Multistandard video decoder with adaptive comb filter
19.7 Issue 7: NTSC-Japan offset compensation does not work as specified
in Y/C mode
Background (how it should work)
:
The difference between NTSC M and NTSC-Japan is the non-existing 7.5 IRE offset in
Japan. The offset should automatically change by setting the preferred standard to
NTSC-Japan instead of NTSC M via CSTD[2:0] = 100.
Anomaly description
:
The offset adaption does not work in Y/C mode (BYPS = 1), however it does work in
CVBS mode.
Impact
:
The picture is too dark and picture content below +5 IRE is limited.
Workaround
:
1. Set decoder brightness (DBRI[7:0]) to 80h (drawback: ‘super black levels’ below
3 IRE are clipped)
or
2. Set decoder to raw data mode by the LCRn registers and use RAWO[7:0] and
RAWG[7:0] to adapt the levels
For detail see
Table 153
.
20. Abbreviations
Table 153. Register setting
Line control register
LCR22
LCR23
LCR24
RAWG[7:0]
RAWO[7:0]
Subaddress
55h
56h
57h
18h
19h
Value
DDh
DDh
DDh
66h
77h
Table 154. Abbreviations
Acronym
AV
CIF
CMOS
CVBS
DB
DR
DVD
EAV
FIFO
FIR
Description
Audio Video
Common Intermediate Format
Complementary Metal-Oxide Semiconductor
Color Video Blanking Signal
Difference Blue
Difference Red
Digital Versatile Disc
End of Active Video
First In First Out
Finite Impulse Response
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