Development of Algorithm for Voice Operated Switch for Digital Audio Control Systems
Journal Title: International Journal of Modern Engineering Research (IJMER) - Year 2013, Vol 3, Issue 5
Abstract
VOS (voice Operated Switch) is a switch that operates when sound over a certain threshold is detected. It is usually used to turn on a transmitter or recorder when someone speaks and turn it off when they stop speaking. It is used instead of a push-to-talk button on transmitters or to save storage space on recording devices. Unlike push-to-talk (PTT) operation, VOS is automatic. The user can keep his hands free while talking. But VOS also has some significant disadvantages that explain why PTT is still common. The Present VOS technology works based on the comparison of the energy estimate in speech band and the noise band. The bandwidth of speech band is from 300Hz to 3.3 KHz and for noise band it is from 3.3 KHz to 6.6 KHz. The major disadvantage with this technique is false operation of VOS due to noise interference or heavy breathing or a side conversation. Hence, a DSP based algorithm is proposed to be developed for DACS (Digital Audio Control System) to improve the performance and the noise suppression.
Authors and Affiliations
Gokula Krishnan
Simulation of three-phase bridge rectifier using MATLAB/SIMULINK for harmonic mitigation
Power quality standards (IEEE-519) compel to limit the total harmonic distortion (THD) within acceptable range caused by rapid usage of power electronic equipment. This paper envisages on the simulation of instantaneou...
A MODEL TO SUBJUGATE TCP STARVATION FOR WIRELESS MESH NETWORKS
wireless mesh networks is an emerging technology in wireless communications, it provides high speed internet access at low cost. In basic topology of wireless mesh network the node which is two hop away from t...
A Survey on Wireless Sensor Network based Technologies for Precision Agriculture System
This paper provides the information related to previous work that has been done in the field of agriculture using the wireless sensor network technology over a period of past few years. We also studied the wirele...
Experimental and Analytical Study on Reinforced Concrete Deep Beam
ABSTRACT: Several reinforced concrete deep beams with different L/D ratios (1.5, 1.6, 1.71) were cast and tested in order to investigate the strain distribution pattern at mid-section of the beam. This paper descri...
An Effective Strategy of Firewall Based Matching Algorithm
Here the perimeter oriented to the network based strategy where the crossing of the traffic plays a major role in its implementation based aspect in a well oriented fashion respectively. Therefore there is a neces...