There are three basic second-order-section (SOS) structures for IIR filters in DSP applications: Form I, Form II, and Transposed Form I. To determine which structure creates the best performance in terms of quantization noise level, instruction cycles, and memory locations, noise models for these three structures are presented. The structures can be combined in cascade or parallel to implement more complicated filters. Noise models for cascade and parallel form connection are discussed. In order to obtain high signal-to-noise ratio on the filter output, a general filter structure with double-precision internal states has been designed to achieve more than 96-dB signal-to-noise ratio. A real test was performed and test results show that the Form I structure is the best SOS and the parallel form connection for high-order IIR filters is superior to the cascade form.
Click to purchase paper as a non-member or you can login as an AES member to see more options.
No AES members have commented on this paper yet.
To be notified of new comments on this paper you can
subscribe to this RSS feed.
Forum users should login to see additional options.
If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.
