>>Introduction about project

>> Block diagram .

>> Microcontroller.

>> Video Codec .

>> Audio Codec . >> Wireless Audio and Video Transmission and – RF -

TFT LCD Module & >> CMOS Camera

>> What had been done? .

>> What will be done. ?

Introduction

Multi-Channel Wireless Digital Video Intercom

Device

Perform simple control functions

such as turning on and off the devices

when the push buttons are

Pressed

PIC18F4520

-HIGHER FREQUENCY BANDS CAN BE PARTITIONED INTO LARGE NUMBER OF CHANNELS AS THEY HAVE BROADER BANDWIDTHS. A BANDWIDTH OF AT LEAST 4-6 MHZ MUST BE ASSIGNED TO OBTAIN A REASONABLY CLEAR PICTURE

ISM 2.4 GHZ FREQUENCY BAND

-MOST WIDESPREAD SYSTEMS IN THE LICENSED-FREE 2.4 GHZ

XBEE-PRO ZNET 2.5

XBEE-PRO ZNET 2.5-RF MODULES ONLY

COMMUNICATE WHEN THEIR IDS ARE MATCHED.

-THE XBEE-PRO ZNET 2.5 IS ABLE TO PERFORM AUTOMATIC ROUTE DISCOVERIES

-THEY CAN TRANSMIT UP TO 120M FOR INDOORS AND 1 MILE FOR OUTDOORS.

VIDEO CODECENCODER

-HIGH SPEED

-DIGITAL TO ANALOG VIDEO ENCODER

-HAS 8-BIT VIDEO PORT TO ACCEPT YCBCR422 VIDEO OUTPUT

VIDEO CODECENCODER

VIDEO CODECDECODER

-CONSUME LESS POWER

-GIVES EXCELLENT QUALITY

-INCLUDE NOISE FILTER

-FIX INCORRECT

-FRAMES(LESS BER)

-IT HAS INTERRUPT PIN

AUDIO CODEC

THE AUDIO CODEC USED IN THE PROJECT IS AD74111 FROM ANALOG DEVICES .

THIS AUDIO CODEC IS PARTICULARLY SUITABLE FOR SPEECH AND TELEPHONY APPLICATIONS WHERE MONO INPUT AND OUTPUT

CHANNELS ARE REQUIRED .

Compression

COMPRESSION

>>PREDICTIVE ENCODING.

>>PERCEPTUAL ENCODING.

CMOS Camera &TFT LCD

The camera used in the project is V100.

It is a 2-megapixel color camera module with digital output and uses the CMOS image sensor OV2640 from OmniVision.

CMOS Camera &TFT LCD

The TFT LCD module is used in the Receiver unit to display the video images of the caller .

What had been done??

.We built the audio circuit but didn’t test it!

Half circuit

What will be done next?

We'll build the next circuits &program the controller in caller unit and receiver

THANKS