PRESENTED BY:

MARRYAM TAHIR
HASNA ARSHAD
ZURRIAT FATIMA


SIGNIFICANCE
The key is to maintain customer loyalty by improving network quality thus generating additional revenue.
 Overview
 The new world of Internet telephony is facing one of the major challenges that long-distant calling had.
 “ECHO”
DEFINITION:
“An echo is the repetition of a sound caused
by the reflection of sound waves”
TYPES OF ECHO:
There are two main types of echo:
 Acousti ....etc

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Code for echo cancellation in matlab? ....etc

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Abstract:

Digital audio broadcasting, DAB, is the most fundamental advancement in radio technology since that introduction of FM stereo radio. It gives listeners interference - free reception of CD quality sound, easy to use radios, and the potential for wider listening choice through many additional stations and services.

DAB is a reliable multi service digital broadcasting system for reception by mobile, portable and fixed receivers with a simple, non-directional antenna. It can be operated at any frequency from 30 MHz ....etc

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Presented By:
Jitendra Soni


Liquid Level Measurement Based on Ultrasonic Echo Characteristic
introduction
 Ultrasound is high frequency mechanical vibrations or pressure waves
 Uses sound waves(>20000Hz)
 Sound waves are transmitted as a series of compressions and rarefactions
 Wave propagation is longitudnal and mechanical displacement in same direction
About Ultra Sonic Technique
 Ultrasonic level sensors are used for non-contact level sensing of highly viscous liquids, as wel ....etc

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ABSTRACT
Wireless phones are increasingly being regarded as essential communications tools, dramatically impacting how people approach day-to-day personal and business communications. As new network infrastructures are implemented and competition between wireless carriers increases, digital wireless subscribers are becoming ever more critical of the service and voice quality they receive from network providers. A key technology to provide near-wireline voice quality across a wireless carrier's network is echo cancellation.

[b ....etc

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I am Kalyani Nawathe. I want full seminar report on Echo Cancellation in Wireless Communication.

My email ID is [email protected]
I will be very glad if u send me the full seminar report of the topic Airborne Internate.

please send me fast it is urgent for me.
Thank you ....etc

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ABSTRACT
The term echo cancellation is used in telephony to describe the process of removing echo from a voice communication in order to improve voice quality on a telephone call. In addition to improving subjective quality, this process increases the capacity achieved through silence suppression by preventing echo from traveling across a network.



Two sources of echo have primary relevance in telephony:
acoustic echo and
hybrid echo.
Echo cancellation involves first recognizing the originally transmitted signal that re-appe ....etc

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code for echo cancellation using matlab ....etc

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An Mp3 is an audio file format which is encoded from an Audio CD or other audio formats like wav, ram etc... Mp3 is the most popular format for music in the present world. Nowadays Mp3 players are available making Mp3's the best form of audio.

These Mp3 files are of different quality which is decided by the bit-rate of the file. Greater the bit-rate bigger the size of the file. These Mp3's have a great advantage of being able to store the various information about the audio file, namely the artist, album , year etc.. This is achieved with th ....etc

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i need some help on echo cancellor i have submit my report on it
....etc

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