<p>The&nbsp;fundamental&nbsp;mode&nbsp;of&nbsp;communication&nbsp;among&nbsp;humans&nbsp;is&nbsp;speech&nbsp;and&nbsp;in&nbsp;the&nbsp;case&nbsp;of&nbsp;</p><p>machine-human interface; verbal language has been believed as the natural method. When&nbsp;</p><p>communication&nbsp;with&nbsp;machines&nbsp;is&nbsp;carried&nbsp;out,&nbsp;it&nbsp;is&nbsp;very&nbsp;difficult&nbsp;and&nbsp;slow-moving&nbsp;in&nbsp;</p><p>magnitude when realized via keyboards, mouses and other devices. Thus, speech feed-in is an&nbsp;</p><p>important constituent to making this communication easily accessible. Also, humans see speech as a&nbsp;</p><p>great source of information. Therefore, persons who are not literate or have vague about computers&nbsp;</p><p>can easily access computers by employing speech instructions. Even people with some physical&nbsp;</p><p>disability who are not able to type or click with their hands can use their speech to operate the&nbsp;</p><p>computer. Even people who are proficient in operating computers can speed up data entry, sending&nbsp;</p><p>emails and other documents using the speech input&nbsp;methods.&nbsp;Furthermore,&nbsp;this&nbsp;mode&nbsp;of&nbsp;&nbsp;</p><p>operation&nbsp;possesses&nbsp;many&nbsp;advantages.&nbsp;For example, while driving, the hands of the driver are&nbsp;</p><p>busy steering the driving wheel and he cannot&nbsp;type&nbsp;on&nbsp;his&nbsp;mobile.&nbsp;In&nbsp;such&nbsp;a&nbsp;case&nbsp;speech&nbsp;&nbsp;</p><p>is&nbsp;a&nbsp;good&nbsp;input&nbsp;option.&nbsp;GPS&nbsp;(Global Positioning System) is an example of a speech-based&nbsp;</p><p>system being used. Another example is speech-enabled dialing, where the user can just ask the&nbsp;</p><p>device to call a particular person, without dialing his number.</p><p><br></p><p>The common and efficient means of communication among humans is through 'speech'. To process speech&nbsp;</p><p>means to extract useful information from it, processing includes&nbsp;the implementation of electric&nbsp;</p><p>signals on the acoustic pressure waves collected from human vocalization&nbsp;and&nbsp;applying&nbsp;&nbsp;</p><p>mathematical&nbsp;analysis&nbsp;to&nbsp;it.&nbsp;The&nbsp;field&nbsp;of&nbsp;processing&nbsp;speech involves the natural operation&nbsp;</p><p>of analysing speech, coding, augmentation, synthesis, and recognition.&nbsp;Analysis&nbsp;of&nbsp;speech&nbsp;is&nbsp;&nbsp;</p><p>the&nbsp;study&nbsp;of&nbsp;its&nbsp;creation&nbsp;mechanism&nbsp;to&nbsp;make&nbsp;a mathematical model of physical phenomena.&nbsp;</p><p>Speech coding aims to keep information about specific speech parameters for later retrieval. The&nbsp;</p><p>method of refining precision and quality of speech which is noisy utilises various algorithms is&nbsp;</p><p>recognized as speech enhancement [2]. Producing artificial human speech using coded information is&nbsp;</p><p>known as the synthesis of speech. The method of inverse synthesis is the capability of a program or&nbsp;</p><p>machine to classify the linguistic contents mixed up in the speech signal.</p><p><br></p>