A high signal-to-noise ratio composite quasar spectrum

A Spectrum Recovery Algorithm using Signal-to-Noise Ratio Classification for Noise Reduction

In the area of speech signal processing, real background noise is important problem for noise reduction, therefore more skillful methods are required in this area. Accordingly, this paper proposes a spectrum recovery algorithm using a signal-to-noise ratio classification method based on a classification of a voiced or unvoiced signal. Therefore, the proposed algorithm recovers a speech spectrum...

Signal-to-Noise Ratio Estimation

Of the many measures that characterize the performance of a communication receiver, signal-to-noise ratio (SNR) is perhaps the most fundamental in that many of the other measures directly depend on its knowledge for their evaluation. In the design of receivers for autonomous operation, it is desirable that the estimation of SNR take place with as little known information as possible regarding o...

Achieving high signal-to-noise ratio in transient reflectivity measurements

Transient reflectivity measurements using ultrashort pulse pump-probe techniques can provide very useful information on fast carrier dynamics in semiconductors. Several non-trivial problems encountered in measuring reflectivity changes have been described. These changes can be very small (ΔR/R ~10 or less) and hence measuring these small changes is not straightforward. The possible solutions in...

A blind signal-to-noise ratio estimator for high noise speech recordings

Blind estimation of the signal-to-noise ratio in noisy speech recordings is useful to enhance the performance of many speech processing algorithms. Most current techniques are efficient in low noise environments only, justifying the need for a high noise estimator, such as the one presented here. A pitch tracker robust in high noise was developed and is used to create a two-dimensional represen...

Digital Transmission : Carrier - to - Noise Ratio , Signal - to - Noise Ratio , and Modulat ion Error Ratio