| Summary: | 碩士 === 中原大學 === 電機工程研究所 === 82 === Throught data compression of HDTV technology has been perfectly
developed recently,yet an effective solution to image
conversion is still not deviced. In the past, the so-called
linear interpolation by filter device was often utilized. Since
the the cost of memory device is dropped, the digital signal
processing has been in leading place of all conversion
techniques. For the image-size conversion, the popular skills
are Zero order and Bilinear methods. Because they tends to
increase high frequency error in conversion, therefore
distortion follows. The theme of this thesis is to derive a
Super Pulse Code Modulation for Vedio Singal (the VSPCM
method). By this method, a large portion of additive high
frequency errors can be reduced. The main part of VSPCM method
is called natural zooming system. First , any 2-D image singal
must be mapped to a series data.Later, each three pixels can
be assumed as to be an Abstract region with convex shape. After
that, each of this region will be abstracted to generate a
vector parameter. According to a vector's parameter, the analog
singal can be regenerated by the regenerator. And finally,a
piece of smooth zooming image can be created by resampling. In
the future, It could be perfectly made by connecting with
different TV singal systems when this result is transplanted on
VLSI chips.Therefore it is very flexible to communiate with
various TV standards.The barrier of standardization will be no
longer existed.
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