SAA7118 Datasheet, PDF (38/169 Pages) NXP Semiconductors – Multistandard video decoder with adaptive comb filter and component video input

Philips Semiconductors
Multistandard video decoder with adaptive
comb filter and component video input
8.2 Component video processing
Preliminary specification
SAA7118
handbook, full pagewidth
FSW
FSW DELAY
G/Y
B / CB
R / CR
Y
RGB/Y-CB-CR ^CB
MATRIX
CR
DOWN
FOMATTER
and
Y
BCS
and
COMPONENT ^CB-CR
DELAY
MIXER
Y
to X-port
CB-CR
bypass
BCS
Y-CB-CR decoder MHB731
Fig.23 Component video processing.
8.2.1 RGB-TO-(Y-C_B-C_R) MATRIX
The matrix converts the RGB signals from the analog-to-digital converters/downsamplers to the Y-C_B-C_R representation.
The input and output word widths are 9 bits. The matrix has a gain factor of 1. The block provides a delay compensated
bypass for component input signals.
The matrix is represented by the following equations:
Y = 0.299 × R + 0.587 × G = 0.114 × B
C_B = 0.5772 × (B − Y)
C_R = 0.7296 × (R − Y)
2001 May 30
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