In order to adapt to increase of the image compression processing in current sensor networks
presents a low storage discrete wavelet transform(DWT) VLSI architecture.Around us scattered all kinds of image acquisition devices
including monitor
computer
mobile video cameras
and growing demand for image precision is higher and higher
which make traditional image compression software processing speed gradually unable to meet the people’s needs
so it is necessary to consider using hardware processing to accelerate.Wavelet transform is often used for image compression
while the use of 5/3 lifting wavelet technology to implement hardware is relatively easy.In order to reduce on chip storage of hardware
through special scheduling operations mode to carry out parallel computing of row and column to effectively reduce on-chip storage demand.After RTL-level simulation and synthesized by SMIC 0.18 μm process
the results show that the scheduling method saves cache unit significantly
and with 100 MHz clock
it ensures fast processing on high-definition(HD) images
and meets needs of image compression decoding in current sensor network.
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references
The Lifting Scheme: A Custom-Design Construction of Biorthogonal Wavelets [J] . Wim Sweldens. Applied and Computational Harmonic Analysis . 1996 (2)