الفهرس يوجد فقط 14 صفحة متاحة للعرض العام
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المستخلص
With the recently uprising revolution of information technology,
the progress accomplished in data storage and data communication has
shown significant advances. Data compression has become a very
powerful and handy tool to achieve an efficient data manipulation
technique that can deal with the outgoing demands. Consequently the
request of more efficient compression techniques had put a burden on the
researcher/programmer’s shoulders. This actually led to the development
of various compression techniques. These techniques compete to satisfy
the spreading demands of many users. In one hand it is required to
compress the data to the minimum size it can reach, while on the other
hand it is required in most situations to reach the shortest compression
time. These two factors are inversely proportional to each other. Thus one
can chose the parameters suitable for his application and try to live with
the other drawbacks or reduce it to the minimum.
Nowadays dealing with Arabic language as one of the computer’s
widely used language, imposes the need for comprehensive research in
this area. In this thesis a study of Arabic text data compression was
completed. This includes using different compression techniques and
various text types. Also a comparison between Arabic and English texts
was conducted to explore performance of the two different languages.
This thesis surveys a variety of data compression methods
spanning almost fifty years of research. It covers the work of Shannon
and Huffinan as a start, passes through the dictionary techniques based on
Ziv Lempel and ends with the predictive techniques. In between a tour
through other techniques such as delta encoding and RLE was done.