REVELATION OF AUDIO AND TEXTUAL USING MULTICASTING TECHNIQUE · REVELATION OF AUDIO AND TEXTUAL USING MULTICASTING TECHNIQUE ... used to add capacity to wireless systems are radio

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REVELATION OF AUDIO AND TEXTUAL

USING MULTICASTING TECHNIQUE

Mr.D.Sathishkumar1, Mr. A.Mohamed Ibrahim2 , Mrs.B.Lalitha3

1. Assistant Professor (Sr.G), Department of EEE,KPR Institute of Engineering and Technology, Coimbatore.

2. Assistant Professor,Department of EEE,KPR Institute of Engineering and Technology ,Coimbatore

3. Assistant Professor (Sr.G.), Department of EEE,KPR Institute of Engineering and Technology ,Coimbatore

Abstract:In early stages the announcement is done by wired technologies and now it is replaced by Wi-

Fi, Zigbee, GSM etc., In this paper RF is used to transmit data in order to increase the distance of

transmission. Generally RF is used for audio transmission with wired receiver ends; we overcome the

wired receiver end by wireless and included serial textual data transfer. The major concept of this

project is that it is secured wireless communication. Transmitter encodes the message before sending it

which couldn’t decode easily by any receiver. But the receiver side of the audio signal transmission is

uncontrollable. This disadvantage is overcome by implementing a controller in the receiver side of audio

signal.The replacement of GSM and Other mobile services is overcome by RF which is used for

transmission of the data without any tariff.

I. INTRODUCTION

Wireless communications is one of the most active areas of technology development of our time. This

development is being driven primarily by the transformation of what has been largely a medium for

supporting voice telephony into a medium for supporting other services, such as the transmission of

video, images, text, and data. Thus, similar to the developments in wire line capacity in the 1990s, the

demand for new wireless capacity is growing at a very rapid pace. Although there are, of course, still a

great many technical problems to be solved in wire line communications, demands for additional wire

line capacity can be fulfilled largely with the addition of new private infrastructure, such as additional

optical fiber, routers, switches, and so on. On the other hand, the traditional resources that have been

used to add capacity to wireless systems are radio bandwidth and transmitter data.

The cost factor is most important for developing countries. The infrastructure cost of wired link for

every individual who wants the network will be much higher compared to the Antenna cost of wireless

link. The flexibility and mobility are the additional features which are important too. When considering

the growth rate of the developing countries, the wireless communication provides lots of room for the

expansion with much less effort. And it is very easy to provide the connectivity to the under developed

villages where there are not much infrastructure for any means of communication. Hence, wireless is

much needed for developing countries.

The major objective of this project is that it is secured wireless communication. Transmitter encodes the

message before sending it which couldn’t decode easily by any receiver. This project can be used for the

purpose of messaging without bill.The replacement of GSM and Other mobile services is overcome by

RF. In early stages the announcement is done by wired technologies and now it is replaced by Wi-Fi,

Zigbee, GSM etc., In this project RF is used to transmit DATA for increasing the distance of

International Journal of Recent Trends in Engineering & Research (IJRTER) Volume 02, Issue 11; November - 2016 [ISSN: 2455-1457]


transmission. Generally RF is used for audio transmission with wired receiver ends; we overcome the

wired receiver ends by wireless and included serial TEXTUAL data transfer.

II. SYSTEM ANALYSIS

2.1 EXISTING SYSTEM:

In the existing system the audio system has controller and multiple receiver ends, but in the receiver side

the medium between the single receiver circuit and the multiple speaker is wired. Their range is restricted,

directivity and issues regarding bandwidth. The device discussed in the report will be able to send the data over a

range of 10 meters and a bandwidth of 100 Kbp. The micro-controller is used to configure the Transmitter and

Receiver chips and also for signal processing. The circuit is tested to send analog data at above mentioned rate.

The product is cost effective and the price can be reduced a lot in case of mass production. The main

disadvantages are only audio can be received by multiple receiver and text’s cannot be received my multiple

receiver in which the range is 10 meters. Less secure and cannot be employed in many industries

2.2 PROPOSED SYSTEM:

Secured wireless communication plays an important role for military, office, industry. Multiuse Text Messaging

and audio by RF project is specially made for wireless communication. It doesn’t need any networking service.

There is Transmitter circuit with a keyboard and a LCD and a microphone, so that user can type his/her message

and send it to desired receiver. The receiver gets buzzing when it receives the message from transmitter. The user

can read the message on LCD by pushing read button and also listen to the audio signal transmitted. As many

times we need to communicate within a campus or a small area. So, this project can use for this purpose without

paying messaging bill. The major point of this project is that it is secured wireless communication. Transmitter

encodes the message before sending it which couldn’t decode easily by any receiver. The advantages are Secured

wireless Audio and text transmission, Increase in range Audio (500-750mts) and text (100-150mts) ,Reduction in

complexity and cost , Multiple receiver ends for both text and audio signals ,text can be send in absence of GSM

hence messaging bill and network coverage problem is completely removed.

III. HARDWARE DESIGN:

3.1 Transmitter Unit:

The keyboard is connected to the USB port through which the signal is transmitted is shown in fig.1. The signal

enters the microcontroller, the supply to the circuit is given by the transformer and this is rectified by the bridge

rectifier circuit. The voltage is fed to voltage regulator and the desired supply is given to the microcontroller and

the LCD display. The entered data is analyzed by the LCD display and it is transmitted using antenna.



Fig.1 Transmitter Unit

3.2 Receiver Unit:

The sent signal is trapped by the antenna at the desired frequency. Then the signal is sent to the microcontroller

and also to the buzzer to create an alert to intimate the signal is received which is shown in fig.2. The supply to

the circuit is given by the transformer and this is rectified by the bridge rectifier circuit. The voltage is fed to

voltage regulator and the desired supply is given to the microcontroller and the LCD. The received message is

displayed in the LCD.



Fig.2 Receiver Unit

3.3 On/Off Controller:

3.3.1 RF transmitter:

RF(Radio Frequency) is a High Frequency signal commonly used for communication applications, due to its high

frequency we can transmit signal to a sufficient distance (about 300 Foots) without attenuation.RF switching

circuit is used to turn ON and turn OFF an LED (For Demonstration) we can replace the LED with a switching

RELAY and control any appliances.

Fig.3. ASK TRANSMITTER

Ask Transmitter is used transmit the signal generated in the circuit via Radio frequency (433MHz). It is an

Encoder, which is used to code the signal generated in circuit, signal means ON and OFF position of switch

S2. SWITCHES The Transmitter section includes 2 SWITCHES, S1 and S2. Switch S1, is configured as

http://2.bp.blogspot.com/-_ERUMiZVhPY/T-wUhgJNFqI/AAAAAAAABEE/X-frPd4m1r4/s1600/Ask+transmitter+pinout+diagram-713680.jpg



Transmitter enable, this determines the condition of Transmitter. This should be always closed to transmit the

signals. Switch S2, it is used as the control Switch to turn ON and turn OFF the LED.

Fig.4 CIRCUIT DIAGRAM FOR CONTROLLER-TX

5.8.2 RF RECEIVER

RF Receiver helps to collect the transmitted signals from RF TRANSMITTER through the antenna and give it to

decoder input. HT 12D It is the Decoder IC in the RECEIVER circuit, which will decode the information

transmitted from RF transmitter. It is just reverse operation of the Encoder. Flip-flop IC 4017. It is a Flip Flop Ic,

which will turn on for the first signal and turn off for the second. The working is same as that of a BI-Stable

Multi-vibrator.

http://www.mycircuits9.com/2012/05/important-points-bistable-multivibrator.html

http://www.mycircuits9.com/2012/05/important-points-bistable-multivibrator.html



Fig. 5 CIRCUIT DIAGRAM FOR CONTROLLER –RX

IV. RESULT AND DISCUSSION: The complete prototype module for the transmitter and receiver section for both audio signal and text messages

are shown in the figure .The wireless transmitter and receiver section for the text messages is simulated by using

PROTEUS software which is shown in figure. Similarly the audio transmitter and receiver sections are simulated

by using the MATLAB software and simulated results with message signals and modulated signals are displayed

below for different audio signals.

a.)Transmitter Circuit b.)Receiver Circuit

Fig.6 Developed Prototype Transmitter & Receiver Circuit for Audio signal



a.)Transmitter Circuit b.) Receiver Circuit

Fig.7 Developed Prototype Transmitter & Receiver Circuit for Text Message signal

Fig.8 Schematic Capture of wireless transmitter and receiver for Text message using PROTEUS software



a. Transmitted Audio Signal

b. Carrier Wave & Modulated Carrier Wave

c. Received Audio signal

Fig.9 Simulated results for various Audio Signals using MATLAB Software



V. CONCLUSION & FUTURE ADVANCEMENTS:

The improvement of wireless data transmission is achieved by reduction of noise with the help of one

channel on off controller and secure data transmission. The distance is increased from 10 meters to 100 meters.

The major point of this project is that it is secured wireless communication i.e. transmitter encodes the message

before sending it which couldn’t decode easily by any receiver.

The strength of the signal gets reduced in case of several numbers of receivers, so the sending signal

strength can be increased. The distance of RF in audio signal transmission can also be increased to several kms.

On further improvement in this project, images can also be sent over RF for some extent.

REFERENCES

1. “Transmission of analog audio signal through wireless Medium using radio frequency”- Nikhil Pande

,Vishal Agarwal , SaurabhShintre, Girish Kumar, H. Narayanan

2. “Development of optical wireless audio system using Infrared light communications”- N.R. Mohamad,

A. A. Wakiran, M. F. Iswandi, A. Salleh, S. A. M. J. Yunus, F. Sallehuddin, N. F. Azmi, S. A. M. Chachuli

3. “Optimal audio transmission over wireless tandem Channels”-Ala' Khalifeh, HomayounYousefi'zadeh

4. “Distortion-Optimal Transmission of Progressive Images over Channels with Random Bit Errors and Packet

Erasures.” H. Yousefi'zadeh, H. Jafarkhani, and F. Etemadi. In Proc. IEEE DCC, 2004.

5. “Powe r Optimization of Wireless Media Systems with Space-Time Block Codes.” H. Yousefi'zadeh, H.

Jafarkhani, and M. Moshfeghi. IEEE Trans. Image Processing, July 2004.

6. “Unequal Error Protection for Wireless Transmission of MPEG Audio.” C.W. Yung, H.F. Fu, C.Y. Tsui,

R.S. Cheng, and D. George. In Proc. IEEE ISCAS, pages 342–345, July 1999.

7. “Performance of an optical wireless communication system as a function of wavelength” H. Manor and S.

Arnon, , Appl. Opt. 42, 2003, 4285-4294.

8. “Indoor Ambient Light Noise and its Effect on Wireless Optical Links”, A. C. Boucouvalas, IEEE Proc.

Optoelectronics, vol. 143, no. 6, Dec. 1996, 334–338.

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REVELATION OF AUDIO AND TEXTUAL USING MULTICASTING TECHNIQUE · REVELATION OF AUDIO AND TEXTUAL USING MULTICASTING TECHNIQUE ... used to add capacity to wireless systems are radio