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參數(shù)資料
| 型號： | SAA8116 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Digital PC-camera signal processor including microcontroller and USB interface |
| 中文描述： | 數(shù)碼電腦攝像頭信號處理器，包括微控制器和USB接口 |
| 文件頁數(shù)： | 15/60頁 |
| 文件大?。?/td> | 237K |
| 代理商： | SAA8116 |
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2001 May 04
15
Philips Semiconductors
Product specification
Digital PC-camera signal processor including
microcontroller and USB interface
SAA8116
M
EASUREMENT ENGINE
The ME extracts statistical information from the video
stream. These measurements are used for the
auto-control loops in the microcontroller (AWB, AE
and AGC).Theycanalsobeusedforotherpurposes,such
as colour detection. The measurements are performed on
pre-formatted Y, U and V streams. It is possible to
measure the accumulated value of the Y, U or V samples
either in the full active video window or in a simple
programmable window.
Five parallel measurements of the luminance can be done
for the auto exposure, each based on a proper window.
Y, U and V can be measured independently for the auto
white balance, all based on the same window.
During each frame, the microcontroller has access to the
measured values of the previous frame.
Video formatter
This block is used to convert the YUV 4 : 2 : 2 format to
4 : 2 : 0 required by the compression engine. The
incoming 4 : 2 : 2 data is vertically filtered. In raw mode,
this block is bypassed to create a full resolution snapshot.
The formatter can also perform downscaling to SIF and
QSIF (see Table 2).
To avoid aliasing, this formatter also contains horizontal
and vertical low pass pre-filters before downscaling.
Table 2
Scaler modes
Compression engine
The compression engine module (see Fig.9) can process
VGA, SIF and QSIF, based on a Philips proprietary
algorithm. The compression ratio is continuously
programmable by setting a maximum bit cost limit. Input
data can also be a raw RGB sensor data to perform
optimum snapshot processing in the host software.
The compression engine uses several strategies and
Q-tables for optimum performance at a wide range of
compression ratios (up to 8
×
). The required table must be
selected via software. One table is optimized for
compressing the raw VGA data.
Real time decoding can be done in software on any
Pentium
or AMD-K6 platform.
SENSOR
TYPE
OUTPUT
FORMAT
SIF 320
×
240
SCALER MODES
VGA
scaled half horizontally
and vertically
QSIF 160
×
120 scaled quarter
horizontally and vertically
handbook, full pagewidth
PREFILTER
YUV7 to
YUV0
HORIZONTAL
DOWNSCALING
COMPRESSION
ENGINE
to
transfer
buffer
TABLE_SELECT
DATA FORMATTER
+
VERTICAL
DOWN SAMPLING
LDC
FCE744
VF_LIMITER
SCALE_DATA
PREFILTER_SEL_UV
PREFILTER_SEL_Y
C_BITCOST_MSB
C_BITCOST_LSB
C_THRESHOLD_MSB
C_THRESHOLD_LSB
Fig.9 The video formatter and compression engine.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SAA8116104BE | 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC PC WEB CAMERA DSP WITH USB RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(shù)量:3 設備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風格:SMD/SMT |
| SAA8116104BE-S | 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC PC WEB CAMERA DSP WITH USB RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(shù)量:3 設備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風格:SMD/SMT |
| SAA8116104BE-T | 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC PC WEB CAMERA DSP WITH USB RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(shù)量:3 設備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風格:SMD/SMT |
| SAA8116ET | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital PC-camera signal processor including microcontroller and USB interface |
| SAA8116HL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital PC-camera signal processor, microcontroller andUSB interface |
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