Low-Power VLSI Architectures for DCT\/DWT: Precision vs Approximation for HD Video, Biomedical, and Smart Antenna Applications

摘要: The DCT and the DWT are used in a number of emerging DSP applications, such as, HD video compression, biomedical imaging, smart antenna beamformers for wireless communications radar. Of late, there has been much interest on fast algorithms computation above transforms using multiplier-free approximations because they result low power complexity systems. Approximate methods rely trade-off accuracy lower and/or circuit complexity/chip-area. This paper provides detailed review VLSI architectures CAS implementations both DCT/DWTs, which can be designed either higher-accuracy or low-power consumption. article covers recent theoretical advancements discrete addition to an overview existing architectures. also discusses error free that high systems approximate offer computational gain making them highly attractive real-world applications subject constraints chip-area as well power. discussed design digital having lowest at cost loss accuracy?the optimal possible A complete synopsis available techniques, FPGA/VLSI realizations paper.