H.263 Video Codec for Wireless Application Embedded in Real-time Linux
Date
2003-06
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Masters
Abstract
The interests of mobile video services arise significantly in the past years. The technical constraints on mobile digital video communications are the high bandwidth and high processing power requirement. Driving the new era of mobile digital video communications is the very low bit rate video compression technique and wireless data communications technique. Video compression is the prime enabler for the mobile digital video communications and is confronting the specific needs of the mobile system for the low bandwidth and high processing power requirement. Wireless data communications technology provides the method of data transmission. These two techniques will become more important as the demand for the mobile audio-visual services grows in the area of mobile communications. This thesis research focuses on using very low bit video compression technology for mobile communications services.
The ITU 11.263 video compression standard is known as video coding for low bit rate communications. This video compression standard has addressed high compression and error robustness. It has become a very popular video compression scheme for PSTN (Public Switched Telephone Network) and wireless communications network.
Linux operating system is open source, cost efficient, easy to be customized and compacted to the smaller size. Linux has implemented the POSIX 1003.b real-time extension. These features make Linux an ideal choice of real-time operating system for embedded applications.
How to utilize 11.263 video compression technology for wireless video communications is the primary goal of the research. An Embedded system and a real-time operating system are employed to accomplish the objective.
In this thesis research, H.263 video compression algorithm is implemented in wireless mobile communications. Real-time Linux is used as the real-time operating system for embedded system design. The applicability and performance of real-time operating system is examined. The issues of how suitable the real-time Linux operating system for wireless mobile system are also investigated and discussed in the thesis.
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Degree
Master of Science (M.Sc.)
Department
Electrical Engineering