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

A new structure utilizing two adaptive filters in a feedback loop 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 TMS32010 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.