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參數(shù)資料
| 型號(hào)： | 935256670557 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 數(shù)字信號(hào)處理 |
| 英文描述： | 0-BIT, 28.6 MHz, OTHER DSP, PQFP80 |
| 封裝： | 12 X 12 X 1.40 MM, PLASTIC, LQFP-80 |
| 文件頁數(shù)： | 2/39頁 |
| 文件大?。?/td> | 314K |
| 代理商： | 935256670557 |
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1997 Jun 13
10
Philips Semiconductors
Preliminary specication
Digital Signal Processor (DSP) for
cameras
SAA8110G
Fig.7 UV-processing.
handbook, full pagewidth
MGK157
UV GAIN
CONTROL
FALSE COLOUR
CORRECTION
NOISE
REDUCTION
false colour
(from Y-processing)
white clip
(from RGB-separation)
UV
(
127 to 128)
8
UV
(
127 to 128)
8
UV-processing
The chrominance component includes several features:
Noise reduction for high frequencies
False colour correction: a colour killer cuts the false
colour components in the UV signals
UV-gain control used to set the correct UV levels for
PAL/NTSC encoding.
As the colour filter saturation levels may be different in the
CCD, the white clip is used in the UV-processing to
suppress colour errors in case of high exposure.
Digital output formatter
This block contains several features:
Generation of a synchronous clock LLC (twice the clock
frequency)
Generation of three synchronization signals (HREF,
CREF and VS)
Synchronization of the output data to the output clock
LLC
Generation of a CIF/QCIF output format for several type
of sensors (see Table 1)
Selection of the required digital output format (8-bit
multiplexed YUV standard D1/CCIR 656, including the
generator of SAV/EAV codes or 16-bit multiplexed YUV
4:2:2 standard DTV2/CCIR601).
Note that the D1 frequency data rate is twice the DTV2
frequency data rate.
Moreover, using a high resolution PAL and NTSC CCDs,
it is possible to generate the following formats by means of
cutting or down-sampling.
CIF 352 × 288 at 25 frame/second and CIF 352 × 240 at
30 frame/second
QCIF 176 × 144 at 25 frame/second and QCIF
176
× 120 at 30 frame/second.
Table 1
CIF/QCIF output format for different sensor
types
INPUT FORMAT
OUTPUT FORMAT
PAL/NTSC-sensor
CIF
‘full screen’
CIF
‘zoom-by-2’
QCIF
‘full screen’
QCIF
‘zoom-by-2’
QCIF
‘zoom-by-4’
CIF
QCIF
‘full screen’
QCIF
‘zoom-by-2’
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