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參數(shù)資料
| 型號： | SAA8115HL |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | Digital Camera USB Interface(數(shù)字照相USB接口) |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP144 |
| 封裝： | 20 X 20 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-486-1, LQFP-144 |
| 文件頁數(shù)： | 12/56頁 |
| 文件大?。?/td> | 177K |
| 代理商： | SAA8115HL |
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2000 Jan 27
12
Philips Semiconductors
Preliminary specification
Digital camera USB interface
SAA8115HL
8.4
Compression engine
The compression engine module (see Fig.3) can process
VGA, CIF, SIF, QCIF and QSIF but has optimal
performance with CIF resolution (30 fps) and VGA
resolution (5 fps). The algorithm is Philips proprietary.
The compression ratio is continuously programmable by
setting the maximum number of bits which can be used for
4 compressed lines, a so-called band (see Table 1). It is
possible to reduce the YUV input data by scaling down
(divide by 2 or divide by 4 operations) to 7 or 6 bits per
sample. For compression with an output rate below 2 bpp
(bits per pixel) it leads to performance improvement.
For a number of compression ratios, performance is also
improved thanks to different quantization tables which are
defined and stored in a ROM. The required table must be
selected via software.
Real time decoding can be done in software on any
Pentium
platform.
handbook, full pagewidth
FCE430
PREFILTER
A
PREFILTER
B
DOWN
SCALER
YUV7 to YUV0
to
transfer
buffer
COMPRESSION
ENGINE
VIDEO_OUTPUT_FORMAT
PAL_VGA
UV_EXCHANGE
PREFILTER_A_ON_OFF
PREFILTER_B_ON_OFF
PREFILTER B_COMB_ON_OFF
COMPRESSION_MODE
VP_C_ BITCOST_(MSB/LSB)
Fig.3 The video formatter and compression engine.
Table 1
Data rate performed by compression engine
FORMAT
ADVISED DATA RATE
MAXIMUM DATA RATE
CIF/SIF
QCIF/QSIF
VGA high quality
VGA
RAW VGA high quality
2 bpp
6 bpp
3 bpp
1.5 bpp
4 bpp
12 bpp (uncompressed)
uncompressed
4 bpp
3 bpp
4 bpp
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| SAA8116ET | Digital PC-camera signal processor including microcontroller and USB interface |
| SAA8116HL | Digital PC-camera signal processor, microcontroller andUSB interface |
| SAA8116 | Digital PC-camera signal processor including microcontroller and USB interface |
| SAA8117HL | REFLECTIVE PHOTOSENSOR SMD |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA8116 | 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 |
| 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(shè)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(fēng)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(shè)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(fēng)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(shè)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(fēng)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 |
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