| Summary: | 碩士 === 國立成功大學 === 電機工程研究所 === 84 === In MPEG system, motion estimation methodology influnces the
transmission speed deeply. This thesis provides a new version
of block-matching algorithm. Instead of searching every block''s
motion vector, we estimate the motion vectors for half of the
blocks in a frame by block-matching technique. The motion
vectors of the other blocks are obtained from the the vectors
of the neighboring block. Next, we apply this technique to
Three Steps Hierachical Search(TSHS). Finally, the algorithm
called a modified version of Three Steps Hierachical Search(
MTSHS) is implemented by FPGAs(Field Programmable Gate Arrays).
According to the simulation results, we can find that the main
advantage of this new technique is saving the searching time
and the slight decline of performances is acceptable.
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