AES E-Library

Filter Topologies

This paper concentrates on the implementation of recursive filters using fixed-point 2's-complement arithmetic for high-fidelity audio. It is now widely accepted that 16/32-bit DSP chips are inadequate for many audio applications. The engineer new to the design and realization of recursive filters may believe that the straightforward use of 24/48 (+overflow)-bit DSP chips will ensure sufficient quality for audio applications. Unfortunately this is not always the case. Filter topologies based on direct form I are recommended for audio. Many filter designs require the use of error-feedback schemes to reduce noise to an acceptable level. Some extremely critical frequency-response designs require the use of double-precision coefficients. Sometimes it is appropriate to use other filter topologies to reduce the noise floor or allow the implementation of extremely critical frequency response designs.

Author: Wilson, Rhonda
Affiliation: Meridian Audio Ltd., Huntingdon, UK
AES Conference:UK 7th Conference: Digital Signal Processing (DSP) (September 1992)
Paper Number:DSP-09 Import into BibTeX
Subject:Digital Signal Processing

Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD aes17)   /procuk/1992lo09/1463.pdf

Start a discussion about this paper!