This was a group Experiment - finding out relevant papers and patents on DSPP applications . We, as a group of 5 – Vaibhav Kanojia, Ayesha Kesharia, Pooja More,Tushar Kumar and myself had to study on IEEE papers and patents which implemented one dimensional signal processing. Our topic was elimination of noise using Comb Filter.
Paper Review:
Topic :Speech Enhancement Using Harmonic Emphasis and Adaptive Comb Filtering
Authors : Wen Jin, Xin Liu, Michael S. Scordilis and Lu Han
Publisher: IEEE
Summary :
In this paper an enhancement method for single-channel speech degraded by additive noise is proposed. A spectral weighting function is derived by constrained optimization to suppress noise in the frequency domain. Two design parameters are included in the suppression gain, noise-flooring parameter and the gain factor. Further enhancement of the harmonics is achieved by adaptive comb filtering derived using the gain factor with a peak-picking algorithm. The performance of the enhancement method was evaluated by the modified bark spectral distance, composite objective measures and listening tests.
Paper Review:
Topic :Speech Enhancement Using Harmonic Emphasis and Adaptive Comb Filtering
Authors : Wen Jin, Xin Liu, Michael S. Scordilis and Lu Han
Publisher: IEEE
Summary :
In this paper an enhancement method for single-channel speech degraded by additive noise is proposed. A spectral weighting function is derived by constrained optimization to suppress noise in the frequency domain. Two design parameters are included in the suppression gain, noise-flooring parameter and the gain factor. Further enhancement of the harmonics is achieved by adaptive comb filtering derived using the gain factor with a peak-picking algorithm. The performance of the enhancement method was evaluated by the modified bark spectral distance, composite objective measures and listening tests.
Patent Review
Patent Number: 5,265,042
Inventors: Wayne E. Smith, Jr., Columbia, Md.
Summary:
This patent describes a nonlinear comb filter device and a method for removing harmonic interference from a corrupted signal. A corrupted signal is basically a signal containing an impulsive signal and harmonic interference. The corrupted signal is delayed through a delay line. Each delay line tap is connected to a corresponding input to a nonlinear device. The delay line and the nonlinear device extract the harmonic interference from the corrupted signal. The extracted harmonic interference is then subtracted from the synchronized corrupted-signal in order to produce the impulsive signal of interest.
Patent Number: 5,265,042
Inventors: Wayne E. Smith, Jr., Columbia, Md.
Summary:
This patent describes a nonlinear comb filter device and a method for removing harmonic interference from a corrupted signal. A corrupted signal is basically a signal containing an impulsive signal and harmonic interference. The corrupted signal is delayed through a delay line. Each delay line tap is connected to a corresponding input to a nonlinear device. The delay line and the nonlinear device extract the harmonic interference from the corrupted signal. The extracted harmonic interference is then subtracted from the synchronized corrupted-signal in order to produce the impulsive signal of interest.
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