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Old 6th Dec 2010, 11:08 am   #4
pitbuell94
Retired Dormant Member
 
Join Date: May 2009
Location: Fresnes, France
Posts: 124
Default Re: 819 line standards convertor.

Hi,

Just few informations concerning the previous screen shot.

There is 4 screen shot showing several signal.

HSYNC > this is the horizontal synchro,

VSYNC > this is the vertical synchro,

VIDON > this is the active visible period between back porch and front porch,

SVIDEO > this is the complete video signal with all synchro but without something visible > this is why I tell previously actually I just generate a black screen.

The four screen shot show the four steps during 819 picture.

Screen shot N° 1 => start of visible period at video line N°39 Field one.

Screen shot N° 2 => end of visible period at video line N°406 and end of Field one at line N°409 with half line for interlaced field.

Screen shot N° 3 => start of visible period at video line N°447 Field two.

Screen shot N° 4 => end of visible period at video line N°816 and end of Field two at line N°818=> in fact line 819 because counter starts at line "0".
Line 0 show the vertical synchro pulse.

Pitbuell94( Frédéric Cabanes).
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