| Summary: | 碩士 === 國立海洋大學 === 電機工程學系 === 91 === In this thesis, we propose a pipelined architecture for the implementation of the lifting-based discrete wavelet transform adopted in the JPEG2000 standard. The architecture integrates the two filters specified by JPEG2000, i.e. 5/3 filter for the reversible and 9/7 filter for the irreversible compression. Our design starts with a one-dimensional structure, which is simple and scalable, but requires a large amount of memory accesses. With the one-dimensional structure as the foundation and by rescheduling the input data sequence, we develop a two-dimensional structure which cuts the memory references in half and is able to perform the discrete wavelet transform nearly twice as fast as the one-dimensional structure. Assuming an image of N × N resolution, the storage requirement for the two-dimensional structure is 9N, a significant improvement over most existing implementations, thanks to the integration of two filters mentioned above.
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