| Summary: | 碩士 === 大同工學院 === 電機工程研究所 === 81 === During to the large-scale development of video communication
has begun to expand rapidly, the techniques for digital image
data compression become to be urgent. Among various compression
techniques, however, a standard image compression method
isneeded to enable interoperability of equipment from different
manufacturers as well as satisfing most image applications. In
this thesis, an international still image compression standard,
known as JPEG, is studied and its baseline codec system
operating based on 8x8 DCT block is implementated in detail.
Additionally, because the fairly long time in coding images
using JPEG standard, we adopt Cho's fast DCT algorithm
andpropose a simple, effective quantization techniques to
implementthe JPEG baseline codec thus to increase its time
efficiency. the other hand, dedicated effort on putting these
algorithms into a digital signal processor 'DSP96002' is also
paid to realize the codec in hardware. Hereafter, the
performance of this coding system is also evaluated and the
result show that the great improvement has been achieved and
the designed performance of realistic hardware is obtained, too.
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