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參數資料
| 型號： | 935261128518 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP100 |
| 封裝： | PLASTIC, SOT-407, QFP-100 |
| 文件頁數： | 2/47頁 |
| 文件大小： | 192K |
| 代理商： | 935261128518 |
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1999 Sep 27
10
Philips Semiconductors
Preliminary specication
Digital PC-camera signal processor
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
FCE314
10
CCD inputs
Y
CR
CB
white clip
Yvertical contour
LINE
MEMORY
LINE
MEMORY
RGB
COLOUR
SEPARATION
Fig.3 Y, CR and CB separation diagram.
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