Performance characteristics of a hardware implementation of the cross-talk resistant adaptive noise canceller

Abstract

A new structure utilizing two adaptive filters in a feedback ioop has been proposed for removing noise in the presence of crosstalk.Labelled the crosstalk resistant adaptive noise canceller (CTRANC), it has been implemented on two boards built around a TMS32O1O and a 8031 processor. These two processors form the main elements of a hardware test work station. Tests have been conducted in a hard walled room with speech and noise sources.With non-optimized parameters, output signal-to-noise ratios exceeded those at the input by 9 to 11 dB. Improvements over the standard adaptive noise canceller ranged from 4 to 11 dB. DRT conducted for speech recorded in a background of helicopter noise and processed through the filter showed an improvement of 21.4 points over that obtained for unprocessed speech.

Speech Enhancement by Multichannel Crosstalk Resistant ANC and Improved Spectrum Subtraction

“…Various two-channel crosstalk resistant ANC (CRANC) methods have been well introduced in the literature [11][12][13][14][15][16]. They make use of the principal of adaptive noise cancellation but permit the main channel sensor and the referential channel sensor to be closely located.…”