SAA8110G/C1 Ver la hoja de datos (PDF) - Philips Electronics

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SAA8110G/C1

Digital Signal Processor (DSP) for cameras

Philips Electronics 

Philips Semiconductors

Digital Signal Processor (DSP) for

cameras

Preliminary specification

SAA8110G

RGB-to-YUV block

After RGB processing, the channels are separated in a

luminance and two colour difference path:

Y = 0.299 R + 0.597 G + 0.114 B, U = 0.49 (B − Y) and

V = 0.88 (R − Y) . It also contains two down-sampling

filters for U and V signals.

Y-processing

The luminance component includes several features:

• Contour correction allowing an increase of the

luminance transitions for a sharper picture

• Black stretch function for contrast enhancement in dark

scenes

• False colour detector used by the UV-processing block

to enable the colour killer

• Filters and noise reduction by coring (only in the high

frequency part of the signal).

handbook, full pagewidth

R

9

Y

(0 to 511)

G

B

CONVERSION

MATRIX

DOWN-

8

SAMPLING

& MUX

UV

(−128 to 127)

MGK155

Fig.5 RGB-to-YUV conversion.

handbook, full pagewidth vertical contour

10

(−512 to 511)

(from RGB-separation)

CONTOUR PROCESSING

AND

FALSE COLOUR DETECTION

false colour

Y

(0, 0.5 to 255.5)

9

BLACK STRETCH

+

NOISE

8

REDUCTION

Y

MGK156

1997 Jun 13

Fig.6 Y processing.

9

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