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Design And Implementation Of A Wireless Video Audio Transmitter And Receiver Over Frequency Mode

The design and implementation of a wireless video audio transmitter and receiver over frequency mode involves the utilization of radio frequencies to transmit and receive audio and video signals wirelessly. This technology employs modulation techniques such as frequency modulation (FM) or amplitude modulation (AM) to encode the audio and video signals onto radio waves for transmission. The transmitter consists of an audio-video input interface, a modulator to convert the signals into radio frequency, a power amplifier to boost the signal, and an antenna for transmission. On the receiver side, there’s an antenna to capture the transmitted signals, a tuner to select the desired frequency, a demodulator to extract the audio and video signals, and an audio-video output interface for playback. Careful consideration must be given to factors such as frequency selection, modulation scheme, transmission power, and antenna design to optimize the system’s performance and ensure reliable wireless communication. Additionally, the implementation should adhere to regulatory standards to avoid interference with other wireless devices operating in the same frequency band.

TABLE OF CONTENTS

COVER PAGE

TITLE PAGE

APPROVAL PAGE

DEDICATION

ACKNOWELDGEMENT

ABSTRACT

CHAPTER ONE

1.0 BACKGROUND OF THE PROJECT

1.1 PURPOSE OF THE PROJECT

SIGNIFICANCE OF THE PROJECT
SCOPE OF THE PROJECT
APPLICATION OF THE PROJECT
LIMITATION OF THE PROJECT

CHAPTER TWO

LITERATURE REVIEW

DESCRIPTION OF WIRELESS SIGNAL
REVIEW OF DIFFERENT TYPES OF WIRELESS SIGNALS
REVIEW OF AN ANTENNAS

CHAPTER THREE

3.0 METHODOLOGY

3.1 SYSTEM BLOCK DIAGRAM

3.2 SYSTEM CIRCUIT DIAGRAM

3.3 CIRCUIT DESCRIPTION

3.4 CIRCUIT DIAGRAM

CHAPTER FOUR

4.0 RESULT ANALYSIS

4.1 CONSTRUCTION PROCEDURE AND TESTING ANALYSIS

4.2 CASING AND PACKAGING

4.3 ASSEMBLING OF SECTIONS

4.4 TESTING OF SYSTEM OPERATION

4.5 IMPLEMENTATION (HOW WE DID IT)

CHAPTER FIVE

CONCLUSION
RECOMMENDATION
REFERENCES

CHAPTER ONE

1.0 BACKGROUND OF THE PROJECT

The era of wire or cable connection for reception of audio and video media is almost obsolete. Now technology is making everything wireless and stress free. This device is another brilliant technology that can let you connect your audio and video footage from one point to another without wires, example connect different TVs in different locations(rooms) from your DVR(DSTV Decoder) without running wires, CCTV cameras to Monitor without running wires, DVD to TVs or speakers in different rooms without running cables.

Wireless A/V Transmitter and Receiver arrives with an inbuilt antenna as well as having a really Low Power Consumption is a new way to share signals from many devices. Share audio and video signals from VCR, DVD, Satellite receivers, set-top box or CCTV camera to any TV or monitor in different rooms wirelessly with this transmitter and receiver system.

This audio and visual system has a huge transmission range and can even reach more than 500 meters (1500ft) in open spaces making it great when setting up around the home or the office. Simply connect using the AV cables provided then turn the transmitter and receiver on for instant signal transmission, so you can start watching the footage straight away. This wireless audio/video transmitter and receiver has adopted advanced microwave wireless transmission technology so that it can transmit high quality video and audio signals, therefore eliminating the need for cables.

Connect the transmitter to your TV or your computer downstairs and the set the receiver in another room and you can enjoy it there, rather than having to carry the DVD player or other equipment into the other room. Ideal for watching TV in another room from the satellite box or for keeping an eye on your property while you lay in bed, this audio and video system allows an alternative to be possible without the need for wire.

1.1 OBJECTIVE OF THE PROJECT

The objective of this work is to design and implement a device for transmitting domestic audio and video signals wirelessly from one location to another over a frequency mode. The frequency at which it is transmitted has much more available bandwidth than that which is available at the analogue level.

1.2 PURPOSE OF THE PROJECT

A wireless audio/video sender allows you to transmit audio/video signals of cable, satellite, video camera, DVD player, VCR, projector, or computer, etc. from one room to another wirelessly. RF-Link 5.8GHz audio/video sender not only provides 300 ft (100 meters) wireless transmission (in open space).

1.3 SIGNIFICANCE OF THE PROJECT

Wireless signals are electromagnetic waves travelling through the air. These are formed when electric energy travels through a piece of metal – for example a wire or antenna and waves are formed around that piece of metal. These waves can travel some distance depending on the strength of that energy.

This device is important because it can transfer information – audio, video, our voices, data — without the use of wires, and that makes them very useful.

1.4 SCOPE OF THE PROJECT

Spread-spectrum techniques are methods by which a signal is deliberately spread in the frequency domain, resulting in a signal with a wider bandwidth. Within the video sender market, these techniques allow for a wireless signal to be transmitted with much less chance of interference from, and to, frequency mode.

It is not uncommon for several Wi-Fi networks to be within range of a typical home and as such, spread-spectrum based video senders are often the best solution for transmitting audio and video signals within this crowded wireless environment.

Some manufacturers use proprietary spread-spectrum techniques, enabling typical operational ranges of up to 80 metres in-building. By also employing externally mounted antennas, operational ranges in excess 2000 metres.

1.5 APPLICATION OF THE PROJECT

This device is used to connect home entertainment and AV devices in a home or a business. These transmitters are also used to connect security cameras to displays and recorders. For instance, a home security system can be set up that utilizes a video transmitter for cameras that monitor the front door, or a home theatre can be set up with wireless transmitters to allow video signals to be beamed to different TVs in the home.

Wireless video transmitters are used to send a video signal from any AV or HD video source to a receiver in another location. They are also used to connect security cameras to display monitors. No matter which type of wireless video transmitter one chooses, there are certain issues the buyer should be aware of when it comes to wireless video transmitters used for security.

1.6 LIMITATION OF THE PROJECT

Radio Interference

Radio frequency interference, or RF interference, is one of the major problems that can plague wireless setups. This is because there are so many wireless devices in operation today. Many of these wireless devices, like cordless phones, function using the same radio frequencies as video transmitters. To determine if this is the problem, one should turn on the wireless receiver without turning on the wireless video transmitter. If any symmetrical picture is displayed it is likely that there is interference.

Obstructions

An obstruction refers to anything that is between the transmitter and receiver and is obstructing the signal from reaching the receiver successfully. Although wireless videos can transmit through walls, there is always some degradation of the signal. If obstructions like walls or thick trees are unavoidable, the solution is to get the transmitting and receiving antennas up as high as possible, as many of the obstructions that the signal encounters include furniture and other items sitting on the floors.