Wavelet-based embedded memory reduction for MPEG decoder
In MPEG-2 HDTV, the bandwidth and size of memory requirements are very large. These requirements increase the system design difficulty and the hardware cost is high. There are a lot of compression algorithms that can reduce the size of the memory, but the algorithms are too complex. We propose a simple algorithm to provide low complexity hardware and high quality video. Our algorithm is based on the wavelet transform (WT) and we use two integer wavelet bases, so there are no multipliers needed. This will reduce the cost a lot in VLSI implementation. Following the WT, we use a variable-length coder to encode the data. For the memory access problem, we use group of macroblock segment coding and a hierarchical access method to reduce the access time.