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This paper deals with the problem of noise cancellation of speech signals in an acoustic environment. In this regard, generally, different adaptive filter algorithms are employed, many of them may lack the flexibility of controlling the convergence rate, range of variation of filter coefficients, and consistency in error within tolerance limit. In order to achieve these desirable attributes as well...
This paper introduces a new voiced speech denoising approach based on the empirical mode decomposition (EMD) associated to an appropriate sifting process. Noisy signal is decomposed adaptively into intrinsic oscillatory components called (IMFs). Since, the energy of a voiced speech signal is distributed over low and medium frequencies, the obtained lower order IMFs (high frequency components) are...
A noise reduction system based on an adaptive line enhancer (ALE) and a noise estimation filter (NEF) has been proposed to reduce both wideband and sinusoidal noise in noisy speech. However, it is inevitable to use a small step size which enables us to update tap coefficients of the NEF without estimating a speech signal. When a fixed step size is used, it is difficult to track the background noise...
In this paper, a multi-microphone technique that uses upsampling and IIR-RLS filter to achieve noise reduction in speech degraded by additive noise in the reverberant environment is proposed. One of the main unique features of the proposed technique is that it does not require any statistics about the desired signal. In addition, it does not rely on voice activity detection (VAD), thus avoids the...
In this paper, a fast noise compensation (FNC) algorithm is proposed for the adaptive decorrelation filtering (ADF) speech separation system in the presence of diffuse noise. The adaptation of ADF is a dynamic process, making noise effects at ADF outputs time-varying in nature. Such changing noise effects need to be tracked and adaptively removed. Under the assumption that acoustic paths are slow...
This work proposes a noise reduction system for use in high noise environments such as motor racing. First, an analysis of the audio data received from the driver reveals that the main noise sources are from the engine, airflow and tyres. These are found to relate to engine speed, road speed and throttle position information that is received in a data stream from the car's on-board computer. A two-stage...
An adaptive system is a well-known method for removing noise from noise-corrupted speech. The problem arises in many situations such as airplane cockpits and automobiles. The variable step size normalized least mean squares (VSS-NLMS) algorithm incorporating a variable step size parameter whose values are based on the ratio of signal-to-noise power has very good convergence speed and low steady-state...
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