Title :
A dedicated processor for time-varying digital audio filters
Author :
Nikolaidis, S.S. ; Mourjopoulos, J.N. ; Goutis, C.E.
Author_Institution :
Dept. of Electr. Eng., Patras Univ., Greece
fDate :
7/1/1993 12:00:00 AM
Abstract :
A dedicated processor for realizing variable digital filters suitable for audio applications is presented. Its architecture is based on the approximation of the time-varying system by finite number of invariant states. A technique which reduces digital filter transfer function distortions caused when filter parameters are changed over time is employed. The proposed transition model is realized by a dedicated unit having a pipeline architecture and allowing a very large number of variable filters to be implemented in real-time
Keywords :
Hi-Fi equipment; digital filters; digital signal processing chips; feedback; pipeline processing; real-time systems; time-varying networks; transfer functions; dedicated processor; error feedback loop; pipeline architecture; real-time; time-varying digital audio filters; transfer function distortions; transition model; variable digital filters; Band pass filters; Circuits; Digital filters; Digital signal processing; Interpolation; Laboratories; Pipelines; Sampling methods; Time varying systems; Transfer functions;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
