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Design of Embedded Image Acquisition and Transmission System Based on Wireless LAN

Author: LiZhiBo
Tutor: LiMingWei
School: Dalian University of Technology
Course: Communication and Information System
Keywords: Image acquisition Wireless LAN AX22001 JPEG compression
CLC: TP368.1
Type: Master's thesis
Year: 2011
Downloads: 28
Quote: 0
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Abstract


Embedded video surveillance has been applied to the full development of image processing technology , embedded technology and communication technology , people's lives , industry and other fields . With the development of wireless network technology , the wireless network transmission rate is higher , longer distances, more reliable data communications , communication state is more stable , which makes wireless network image transmission becomes possible . Wireless video surveillance system has the advantages of low-cost , flexible networking , scalability , its application is very promising . Many wireless communication technologies , wireless local area network (WLAN) is the best platform for wireless video transmission . This article describes that is an embedded technology and wireless LAN technology combining wireless network image transmission system . That the system has completed the acquisition, transmission , and display of the image data . In order to make more efficient use of the limited bandwidth , before the image data is sent to the wireless network , using the JPEG standard for image compression . AsiaInfo AX22001 chip as the main controller , at the same time the AX22001 and is an 802.11 wireless LAN baseband / MAC controller , wireless data transceiver can by external AL2230S , RF chip . The front end of image acquisition using is ICX405AK board after SAA7111 video decoder chip decodes the output signal of the YUV format image , then from ZR36060 pair of image data compression . AX22001 SAA7111 I2C bus control by local bus control ZR36060 and read from the compressed image data . Firstly, given the overall structure of the system . After the introduction of the system 's hardware and software design , in which the hardware part of the connection between the circuit including the characteristics of each chip , workflow and chips , software design and PC software design section includes various chip configuration , communication procedures . Finally, a brief introduction to the various parts of the debugging method and system performance analysis .

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