SAF7118 View Datasheet(PDF) - Philips Electronics

Part Name

Description

View to exact match

SAF7118

Multistandard video decoder with adaptive comb filter and component video input

Philips Electronics 

Philips Semiconductors

Multistandard video decoder with adaptive

comb filter and component video input

Product specification

SAF7118

8.2.3 COMPONENT VIDEO BCS CONTROL

The resulting Y and CB-CR signals are fed to the Component BCS (CBCS) block, which contains the following functions:

• Chrominance saturation control by CSAT7 to CSAT0

• Luminance contrast and brightness control by CCON7 to CCON0 and CBRI7 to CBRI0

• Limiting Y-CB-CR or CVBS to the values 1 (minimum) and 254 (maximum) to fulfil “ITU Recommendation 601/656”.

handbook, full pagewi+d2th55

+235

white

+255

+240

+212

blue 100%

blue 75%

+255

+240

+212

red 100%

red 75%

+128 LUMINANCE 100%

+16

black

0

a. Y output range.

+128

colourless

CB- COMPONENT

+128

colourless

CR- COMPONENT

+44

yellow 75%

+44

+16

yellow 100%

+16

0

0

cyan 75%

cyan 100%

MHB730

b. CB output range.

c. CR output range.

“ITU Recommendation 601/656” digital levels with default CBCS (decoder) settings CCON[7:0] = 44H, CBRI[7:0] = 80H and CSAT[7:0] = 40H.

Equations for modification to the Y-CB-CR levels via CBCS control I2C-bus bytes CBRI, CCON and CSAT.

Luminance: YOUT = Int C-----C-6---O8-----N--- × (Y – 128) + CBRI

Chrominance: (CBCR)OUT = Int C-----S6----4A----T-- × (CB, CR – 128) + 128

It should be noted that the resulting levels are limited to 1 to 254 in accordance with “ITU Recommendation 601/656”.

Fig.27 Components Y-CB-CR range.

2004 Jul 22

41

Share Link: