Performance Evaluation of Speech Radio band Extension Technique using Simulink

Abstract

The prime restriction characteristic of most communication systems is Bandwidth. In telephone networks, the functional voice frequency spreads in the interval 300 to 3400 Hz and is often referred to as In-Band (IB). The performance and perception of speech are extensively influenced by the IB. The Speech Radio Band Extension (SRBE) technique enforced alongside the IB speech signal aids in boosting the performance and perception of IB speech signals by sending strayed speech frequency components as extra data. At the receiver, an enhanced Wide Band (WB) signal is generated from the missing speech frequency components that are transmitted as additional information. Here both transmitter and receiver are implemented in the Simulink model. The competence of the SRBE technique is investigated in this research by comparing it with a Traditional Telephony Speech Enhancement Technique (TTSET). Subjective listening and objective testing assessments authenticate the improvement of the performance and perception of IB speech.