Noise Reduction and Echo Cancellation Using Threshold Filters in Hands Free Communication Systems
Journal Title: International Journal of engineering Research and Applications - Year 2018, Vol 8, Issue 7
Abstract
Background noise, far-end acoustic echo, and room reverberation dramatically degrade the performance of many hands-free speech communication systems, in practical environments. For example, for automatic speech recognition system, noises result in the mismatch between the training and testing conditions, further degrading the performance of recognition system in real-world conditions. The threshold filtering can be executed with the help of mask windows of different sizes. For this, first we have to detect the noisy pixel, if the detected pixel is contaminated it can be identified by the homogeneity level of the local region around that pixel. Suppose the signal is corrupted by noise, which means the pixel value, is both 0 and 255 then we must calculate the threshold value and compare it with the neighbouring upper and lower pixels and find out which of them is homogeneous with the threshold value and replace the pixel with that value. In addition to hands-free speech communication systems, the proposed threshold filter system in this thesis is also useful and preferable to many other applications. For example, for speech recognition systems, it is able to improve the recognition accuracy of the received speech signals in adverse environments.
Authors and Affiliations
Ankita Shukla, Dr. Vineeta Saxena Nigam
Keywords
Related Articles
- EP ID EP394995
- DOI 10.9790/9622-0807043337.
- Views 121
- Downloads 0
Underground Mining Radio Communication System’s Risk And Reliability
There is a lot of risk of harm and damage caused by disaster in underground mine communication system. Among the disaster risks that can be occurred in underground mine earth quake has high probability. Therefore we have...
Consequences and Influence of Loads That Are Not contemplated In the Structure Calculation Process In some regulations.
The approach to the calculation of the structure of a building, apart from the geometry and its peculiarities always in the first instance, the first approach is to analyze the state of loads, according to current legisl...
Direct current magnetron sputtered ultrathin Ag/Ta/glass films
In this study, ultrathin Ta, Ag and Ag/Ta thin films deposited onto glass substrates using direct current magnetron sputtering. The physical properties of as-deposited films were investigated by scanning electron microsc...
Quantification Of Some Antioxidant Compounds In Raw Sweet Potato By Spectrophotometric Method
The Objective Of This Study Was To Estimate The Level Of Some Antioxidant Compounds (Total Carotenoids Content, Total Vitamin C Content) In Several Sweet Potato Korean Varieties, Cultivated At Research And Development Ce...
Camera Calibration: An Overview of Concept, Methods and Equations
Camera calibration is favored as an important issue in photogrammetry and computer vision literatures. The importance of this issue can be due to two reasons: firstly, every recently camera should be calibrated before be...