Noisy signal identification from non-stationary audio signals
First Claim
1. A processor implemented method (300) comprising:
- receiving a feature set (F) of a plurality of features associated with non-stationary audio signals (302);
receiving a training set comprising a plurality of non-stationary clean audio signals (C) and non-stationary noisy audio signals (N) (304);
generating a unique and distinctive feature set (UF) based on the training set and the feature set (F) (306);
dynamically generating an unbiased threshold of unique feature attribute value (UFAV) and polarity (P) associated with each of the unique and distinctive features of the unique and distinctive feature set (UF) (308);
identifying a test signal as non-stationary noisy test signal or non-stationary clean test signal by statistical isolation based on (i) a unique feature attribute value (UFAV) and polarity (P) associated with the test signal for each of the unique and distinctive features and (ii) the dynamically generated unbiased threshold of the unique feature attribute value (UFAV) and the polarity (P) associated with each of the unique and distinctive features of the unique and distinctive feature set (UF) (310); and
classifying the test signal further as one of lightly noisy test signal and highly noisy test signal (312) based on one or more pre-defined conditions when the test signal is identified as the non-stationary noisy test signal.
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Accused Products
Abstract
Traditionally known classification methods of non-stationary physiological audio signals as noisy and clean involve human intervention, may involve dependency on particular type of classifier and further analyses is carried out on classified clean signals. However, in non-stationary audio signals a major portion may end up being classified as noisy and hence may get rejected which may cause missing of intelligence which could have been derived from lightly noisy audio signals that may be critical. The present disclosure enables automation of classification based on auto-thresholding and statistical isolation wherein noisy signals are further classified as highly noisy and lightly noisy through continuous dynamic learning.
33 Citations
17 Claims
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1. A processor implemented method (300) comprising:
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receiving a feature set (F) of a plurality of features associated with non-stationary audio signals (302); receiving a training set comprising a plurality of non-stationary clean audio signals (C) and non-stationary noisy audio signals (N) (304); generating a unique and distinctive feature set (UF) based on the training set and the feature set (F) (306); dynamically generating an unbiased threshold of unique feature attribute value (UFAV) and polarity (P) associated with each of the unique and distinctive features of the unique and distinctive feature set (UF) (308); identifying a test signal as non-stationary noisy test signal or non-stationary clean test signal by statistical isolation based on (i) a unique feature attribute value (UFAV) and polarity (P) associated with the test signal for each of the unique and distinctive features and (ii) the dynamically generated unbiased threshold of the unique feature attribute value (UFAV) and the polarity (P) associated with each of the unique and distinctive features of the unique and distinctive feature set (UF) (310); and classifying the test signal further as one of lightly noisy test signal and highly noisy test signal (312) based on one or more pre-defined conditions when the test signal is identified as the non-stationary noisy test signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system (100) comprising:
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one or more data storage devices (102) operatively coupled to one or more hardware processors (104) and configured to store instructions configured for execution by the one or more hardware processors to; receive a feature set (F) of a plurality of features associated with non-stationary audio signals; receive a training set comprising a plurality of non-stationary clean audio signals (C) and non-stationary noisy audio signals (N); generate a unique and distinctive feature set (UF) based on the training set and the feature set (F); dynamically generate an unbiased threshold of unique feature attribute value (UFAV) and polarity (P) associated with each of the unique and distinctive features of the unique and distinctive feature set (UF); identify a test signal as non-stationary noisy test signal or non-stationary clean test signal by statistical isolation based on (i) a unique feature attribute value (UFAV) and polarity (P) associated with the test signal for each of the unique and distinctive features and (ii) the dynamically generated unbiased threshold of the unique feature attribute value (UFAV) and the polarity (P) associated with each of the unique and distinctive features of the unique and distinctive feature set (UF); and classify the test signal further as one of lightly noisy test signal and highly noisy test signal based on one or more pre-defined conditions when the test signal is identified as the non-stationary noisy test signal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A computer program product comprising a non-transitory computer readable medium having a computer readable program embodied therein, wherein the computer readable program, when executed on a computing device, causes the computing device to:
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receive a feature set (F) of a plurality of features associated with non-stationary audio signals; receive a training set comprising a plurality of non-stationary clean audio signals (C) and non-stationary noisy audio signals (N); generate a unique and distinctive feature set (UF) based on the training set and the feature set (F); dynamically generate an unbiased threshold of unique feature attribute value (UFAV) and polarity (P) associated with each of the unique and distinctive features of the unique and distinctive feature set (UF); identifying a test signal as non-stationary noisy test signal or non-stationary clean test signal by statistical isolation based on (i) a unique feature attribute value (UFAV) and polarity (P) associated with the test signal for each of the unique and distinctive features and (ii) the dynamically generated unbiased threshold of the unique feature attribute value (UFAV) and the polarity (P) associated with each of the unique and distinctive features of the unique and distinctive feature set (UF); and classifying the test signal further as one of lightly noisy test signal and highly noisy test signal based on one or more pre-defined conditions when the test signal is identified as the non-stationary noisy test signal.
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Specification