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ROBUST FEATURE EXTRACTION USING DIFFERENTIAL ZERO-CROSSING COUNTS
ROBUST FEATURE EXTRACTION USING DIFFERENTIAL ZERO-CROSSING COUNTS
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机译:使用零交叉计数的鲁棒特征提取
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摘要
A low power sound recognition sensor is configured to receive an analog signal that may contain a signature sound. Sparse sound parameter information is extracted from the analog signal and compared to a sound parameter reference stored locally with the sound recognition sensor to detect when the signature sound is received in the analog signal. A portion of the sparse sound parameter information is differential zero crossing (ZC) counts. Differential ZC rate may be determined by measuring a number of times the analog signal crosses a threshold value during each of a sequence of time frames to form a sequence of ZC counts and taking a difference between selected pairs of ZC counts to form a sequence of differential ZC counts.
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