SDA9410
Preliminary Data Sheet
Input signal processing
5.4.2.1 Vertical compression and peaking
The overall reduction of the vertical compression block can be calculated by the formula:
512
1
---------------------------------------- ---------------------
Ε512 + INTVMΦ DEZVM
The user must specify the vertical input picture size (defined by I²C Bus parameter
ALPFIPM/ALPFIPS) and the vertical output picture size (defined by I²C Bus parameter
APPLM/APPLS) as well as the I²C Bus parameter INTVM/INTVS (I²C Bus parameter,
09h,0Ah,2Bh,2Ch) and DEZVM/DEZVS (I²C Bus parameter, 0Ah,2Ch), which can be
calculated with the algorithm listed below (C-code).
intV, dezV: variables
for( intV=2*ALPFM/S, dezV=1; intV<=2*ALPFIPM/S; intV*=2, dezV*=2 )
;
intV = ((512*2*ALPFIPM/S*2+intV/2)/intV);
dezV/=2;
if(dezV>16)
{
intV=intV*dezV/16;
dezV=16;
}
INTVM/S=intV-512;
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Micronas
MICRONAS [ MICRONAS ]
