SAA8113HL View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

SAA8113HL

Digital PC-camera signal processor

Philips Electronics 

Philips Semiconductors

Digital PC-camera signal processor

Preliminary specification

SAA8113HL

8 FUNCTIONAL DESCRIPTION

8.1 Black offset preprocessing

The CCD signal contains additional pixels outside the

active window, which are used to measure the reference

black level. These pixels are located in the optical black

window, whose position can be set through the serial

interface. The optical black level can be adjusted by the

microcontroller in order to proceed rapidly. In this case, the

microcontroller directly adjusts the analog preprocessing

clamp included in the TDA8786 or TDA8784 and takes

advantage of the full code range. Otherwise, the black

level is fixed by settings that are downloaded through the

serial interface.

8.2 Y, CR and CB separation

For each pixel value, this block (see Fig.3) generates the

three components: the luminance signal Y and the two

colour signals CR (2R − G) and CB (2B − G). Two line

memories are required for this function. This block also

provides vertical contour and white clip information.

handbook, full pagewidth

CCD inputs

LINE

MEMORY

LINE

MEMORY

10

RGB

COLOUR

SEPARATION

Y

CR

CB

white clip

Yvertical contour

FCE314

Fig.3 Y, CR and CB separation diagram.

1999 Sep 27

10

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