access icon free Combined one-dimensional lowpass and highpass filters for subband transformer

© The Institution of Engineering and Technology
Received 19/03/2013, Published

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.

Inspec keywords: field programmable gate arrays; filtering theory; signal sampling; high-pass filters

Other keywords: field programmable gate array; combined one dimensional highpass filters; intermediate signals; combined one dimensional lowpass filter; subband transformer coefficients; uncompressed signal

Subjects: Signal processing theory; Filtering methods in signal processing

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