Wireless Security System Noel Campbell Vivek Shah Raymond Tong TA: Javier Castro

Video Surveillance Block Diagram

Video Capture Overview Camera ADV7185 Composite In tv_in_ycrcb [19:0] Clock_27MHz tv_clock Memory Controller Dual-Port Block Memory VGA Controller ycrcb [29:0] X WE Y ADDR YCrCb to RGB Converter Display NTSC Decoder Async FIFO Clock_27MHz Z RGB Syncing and blanking signals encode_busy writing_memory Y isolator 8 Y [7:0]

Technical Considerations Synchronization of data  ADV7185 clock vs lab kit 27 MHz clock Displaying data in VGA  Acquire 240 X 240 real time video Write data to block memory then continuously read from it Memory Controller  Write a frame worth of data into block memory for encoding and transmission

Video Compression Discrete Cosine Transform Inverse Discrete Cosine Transform 512 bits/block 56 bits/block

Video Encoder

Wireless Transmission Data is sent serially from the labkit to the wireless kit Data is assembled into packets and sent from camera-end to fixed-end via CC2420 radio Data is then sent serially from receiver wireless kit to the receiver labkit

Transmitter 80 x 900 Dual Port BRAM 80 Radio Transmitter to receiver serial cable Transmitter Control Unit Shift Register RS232 Sender from encoder 8 FPGAmicrocontroller

Receiver 80 x 900 Dual Port BRAM Transmitter Control Unit RS232 Receiver Shift Register 80 Radio Receiver serial cable from transmitter to decoder FPGAmicrocontroller

Video Decoder

Video Display Overview Y [7:0] Dual-Port Block Memory 8 VGA Controller YCrCb to RGB Converter Display Z RGB Syncing and blanking signals AddrX Delay Z * Only chrominance (Y) is important if displaying grayscale image Clock_27MHz to all modules decode_done Memory Controller