To design a low round-off noise crossover filter with simple structure, such as the D2 form, offers a great challenge, especially when the frequency of interest is very low compared to the sampling frequency. This paper introduces error spectrum shaping (ESS) techniques along with the state space computation of ESS coefficients and noise gain. Several examples show that the ESS techniques can be successfully applied to the Linkwitz-Riley filter topology to significantly reduce the finite word-length effects, while at the same time preserving the computational efficiency.
Click to purchase paper as a non-member 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 $33 for non-members and is free for AES members and E-Library subscribers.