Efficient Method of Pitch Estimation for Speech Signal Using MATLAB

In this paper, we are estimating the pitch of telephone speech signal. We use different types of methods such us, Burg, Covariance, Fast Fourier transform, Modified Covariance, Multiple Signal Classification (MUSIC) algorithm or Eigen vector, Multi Taper method (MTM), Welch, and Yule Auto Regressive (Yule AR) , to estimate the PSD using signal processing tool box of MATLAB. The spectrum was constructed and the pitch ,amplitude , and slope of the speech signal were calculated and their performance were analyzed

A High Efficient High Input Power Factor Interleaved Boost Converter

In this paper an improved ZVT interleaved boost PFC topology is introduced. The proposed ZVT interleaved boost converter is composed of two cell boost conversion units and an active auxiliary circuit. The proposed converter has two important advantages over the similar soft switching converters. The first one is that parallel to the main switches of the converter the auxiliary switch also operates under soft switching condition. Providing soft switching conditions for interleaved boost converters with more than one cells using only one auxiliary switch is another advantage of this topology. The prototype for the proposed converter was developed with an input of 110V-220V ac power supply feeding a resistive output load of 600 watts. In addition, the proposed converter has the advantages of fewer structure complications, lower cost and ease of control.DOI:http://dx.doi.org/10.11591/ijece.v2i3.25

ICT INTEGRATION IN EDUCATION: THE CASE OF SECONDARY SCHOOLS IN KERALA

The quality of education in rural areas has not risen to the expected standard due to lack of access, inadequate infrastructure, poor connectivity of ICT, and insufficient number of teachers, etc. This empirical study aims at finding out the factors influencing successful ICT integration in rural schools with special focus on the availability of ICT infrastructure, extent of ICT utilization in classrooms and the barriers encountered in its effective usage. The findings indicate that ICT infrastructure is inadequate and its use in teaching and learning were found to be minimal and has not brought about much improvement. Underutilization of the technology has resulted in lowering the digital competency of the students. Frequent utilization of smart-classrooms along with a strong ICT infrastructure and their integration into teaching activities can play a significant role in facilitating digital education in rural schools