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PROJECT TOPIC ON SECURITY SINUSOIDAL TRANSFORM OF SPEECH CODING FOR MOBILE COMMUNICATION

PROJECT TOPIC ON SECURITY SINUSOIDAL   TRANSFORM OF SPEECH CODING FOR MOBILE COMMUNICATION

ABSTRACT

This project security sinusoidal transform of speech coding for mobile communication centers on the transformation of speech codes used in communication. Speech coding is the efficient representation of speech on digital form. It is one of the key technologies in current and evolving digital cellular and wireless voice communication offerings. The speech coders in existing standards exhibit a level of sophistication and performance unimaginable just 15 years ago. Chapter one tends to look at the introduction of the topic and the characteristics of mobile communications. It also looks at the statement of the problem, why the study is being carried out, significance of the study and the limitations of the study imposed by the wireless channel and by background impairments. Chapter two looks at the literature review of previous researchers on the project topic. Chapter three looks at the presentation of approaches to address their resulting effects by researchers. Chapter four discusses the designing of speech codes. Finally, chapter five summarizes the project topic in a nutshell. It also discusses the conclusion and recommendation made by researchers for future research in speech coding for mobile communication problem

CHAPTER ONE

INTRODUCTION

 BACKGROUND OF THE STUDY

The introduction of speech coding for mobile communication through security sinusoidal transformation. Speech coding is the application of data compression of digital audio signal containing speech. Speech coding uses speech-specific parameter estimation using audio signal processing techniques to model the speech signal, combined with generic data compression algorithms to represent the resulting modeled parameters in a compact bitstream.

The two most important applications of speech coding are mobile telephony and voice over IP.The techniques employed in speech coding are similar to those used in audio data compression and audio coding where knowledge in psychoacoustics is used to transmit only data that is relevant to the human auditory system.

For example, in voice band speech coding, only information in the frequency band 400HZ to 3500Hz is transmitted but the reconstructed signal is still adequate for intelligibility.Speech coding differs from other forms of audio coding in that speech is a much simpler signal then most other audio signals, and a lot more statistical information is available about the properties of speech.

As a result, some auditory information which is relevant in audio coding can be unnecessary in the speech coding context. In speech coding, the most important criterion is preservation of intelligibility and pleasantness of speech, with a constrained amount of transmitted data. The intelligibility of speech includes, the actual literal content, speaker identity, emotions, intonation, timbre etc.

In addition, most speech applications require low coding delay, as long as coding delays interfere with speech interaction Communication is the exchange of thoughts, messages or information, as by speech, signals, writing or behaviour. It is derived from the latin word.“Communis”, which means to share. Communication requires a sender, a message and a recipient, although the receiver need not be present or aware of the sender’s intent to communicate at the time of communication, thus communication can occur across vast distances in time and space.

Communication requires that the communicating parties share an area of communicative commonality. The communication process is complete once the receiver has understood the message of the once the receiver has understood the message of the sender. Feedback is critical to effective communication between participants. Bandwidth is a key concept in many telephony applications.

In radio communications, for example, band width is the frequency range occupied by a modulated carrier wave, whereas in optics, it is the width of an individual spectral line or the entire spectral range.In many signal processing contexts, bandwidth is a valuable and limited range of frequencies. A government agency may apportion the regionally available bandwidth to broadcast license holders so that their signals do not mutually interfere.

For different applications there are different precise definitions for bandwidth. It could be defined as the range of frequencies beyond which the frequency function is zero. This would correspond to the mathematical notion of the support of a function. Bandwidth can also be referred to as the frequencies where the frequency function is small.

PROJECT TOPIC ON SECURITY SINUSOIDAL TRANSFORM OF SPEECH CODING FOR MOBILE COMMUNICATION

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FREEMANBIZ COMMUNICATION
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