General Purpose Biquads Optimized for Dynamic Range and Low Noise

Jurisic, Drazen; Mijat, Neven; Mihalic, I.

doi:10.1109/melcon.2006.1653028

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“…The filters used in the model were Hilbert Filter and Biquad Filter. The usefulness of biquad filters can be seen in [1][2][3][4] while that of Hilbert filters can be seen in [5]. The design considerations for a biquad filter can also be obtained from [11].…”

Section: Simulink Components Usedmentioning

confidence: 99%

Role of Biquad and Hilbert Filters in Removing Noise? A Simulink Analysis

Jha¹

2015

IJSIP

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Often some noise signals get interleaved with speech signals and owing to noisy surroundings the captured signal may not sound as desired. For such cases, a combination of Hilbert transform filter and Biquad filter in cascaded form might prove helpful. An arrangement in a simulink model demonstrates successful noise reduction in a voice signal recorded from a microphone. Both the filters used were of Direct Form structure, while the Hilbert filter was a Direct Form FIR, the Biquad was Direct Form II structure filter. The observations for speech signal as well as noise signals have been produced as results that show a significant noise removal.

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