Multirate systems and filter banks
Multirate systems and filter banks
Discrete-time signal processing (2nd ed.)
Discrete-time signal processing (2nd ed.)
Digital Processing of Signals: Theory and Practice
Digital Processing of Signals: Theory and Practice
Digital Signal Processing: A Computer-Based Approach
Digital Signal Processing: A Computer-Based Approach
Digital Signal Processing: A Practical Approach
Digital Signal Processing: A Practical Approach
Advanced Digital Design with the VERILOG HDL
Advanced Digital Design with the VERILOG HDL
Multirate Signal Processing for Communication Systems
Multirate Signal Processing for Communication Systems
Realization of IIR decimation filters based on merged delay transformation
Research Letters in Signal Processing
Transformation to implement computationally efficient IIR decimation filters
Digital Signal Processing
IEEE Transactions on Signal Processing
Low-power decimator design using approximated linear-phase N-band IIR filter
IEEE Transactions on Signal Processing
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The paper presents high speed and computationally efficient architecture for the recursive interpolation filters for digital audio applications. Conversion of anti-imaging IIR filter that is an essential part of an interpolator, into an efficient interpolation filter is based on merged delay transformation. Any higher order filter is required to be implemented in parallel using first order and second order sections. This requirement provides the benefits of high speed processing. The optimal architectures for the first and second order sections are introduced. The computational cost is reduced up to 33.65% as compared to cascaded IIR-based interpolators and cost reduction of 89.48% is achieved as compared to polyphase FIR-based interpolators. A 1-to-4 interpolation filter is implemented on FPGA using Verilog HDL at input sampling frequency of 44.1kHz and its power and critical path delay is compared with known architectures. Smaller critical path delay and lower computational cost are the important characteristics of this architecture which is highly desired in portable digital audio applications.