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Blanking
Optional blanking
Line 4
Image: Field 1
Blanking
Line 266
Optional blanking
Image: Field 2
Line 3
H = 1 (EAV)
H = 0 (SAV)
1(V = 1)
10 (V = X)
20 (V = 0)
264 (V = 1)
273 (V = X)
283 (V = 0)
525 (V = 0)
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Image: Field 1
Blanking
Image: Field 2
H = 1 (EAV)
H = 0 (SAV)
1(V = 1)
23 (V = 0)
311 (V = 1)
336 (V = 0)
625 (V = 1)
Line 1
Line
313
Line 625
525 lines/60 Hz 625 lines/50 Hz
Field 1
(F = 0)
Field 2
(F = 1)
Field 1
(F = 0)
Field 2
(F = 1)
624 (V = 1)
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BT.656VideoDisplayMode
SAVandEAVcodesareidentifiedbya3-bytepreambleofFFh,00h,and00h.Thiscombinationmustbe
avoidedinthevideodataoutputbythevideoporttopreventaccidentalgenerationofaninvalidsync
code.Thevideodisplaymoduleprovidesprogrammablemaximumandminimumvalueclippingonthe
videodatatopreventthispossibility.
ThetypicalvaluesforH,V,andFondifferentlinesareshowninTable4-2andFigure4-11.
FandVareonlyallowedtochangeatEAVsequences.TheEAVandSAVsequencesmustoccupythe
firstfourwordsandthelastfourwordsofthedigitalhorizontal-blankinginterval,respectively.TheEAV
codeisinsertedwhenFPCOUNT=HBLNKSTART.TheSAVcodeisinsertedwhenFPCOUNT=
HBLNKSTOP.
Table4-2.BT.656FrameTiming
LineNumber
625/50525/60FVDescription
624-6251-311Verticalblankingforfield1,EAV/SAVcodestillindicatesfield2.
1-224-1901Verticalblankingforfield1.ChangeEAV/SAVcodetofield1.
23-31020-26300Activevideo,field1.
311-312264-26501Verticalblankingforfield2,EAV/SAVcodestillindicatesfield1.
313-335266-28211Verticalblankingforfield2.ChangeEAV/SAVcodetofield2.
336-623283-52510Activevideo,field2.
Figure4-11.DigitalVerticalFandVTransitions
HHHH
LineNumberFV(EAV)(SAV)LineNumberFV(EAV)(SAV)
1-311101-220110
4-19011023-3100010
20-2630010311-3120010
264-2650110313-3351110
266-2821110336-6231010
283-5251010624-6251110
VideoDisplayPort 100SPRUEM1–May2007
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