Combined one‐dimensional lowpass and highpass filters for subband transformer
Vladimir M. Rajovic, G. Savic, Vladimir Čeperković, Milan D. Prokin · Electronics Letters · 2013
Subband transformation coefficients are typically computed by first filtering and downsampling of an input uncompressed signal and then subsequently filtering and downsampling the result intermediate signals with a set of lowpass and highpass filters. State‐of‐the‐art subband transformers are complex, which increases consumed power. A novel method for significantly decreasing the complexity of subband transformers to a minimum is presented. This solution was implemented in a field programmable gate array, together with various methods for compression and decompression.