FPV Video Scrambler Analog Signal Scrambling Descrambling For RC Racing Drones

Key Features:

• The CVBS video stream scrambling and descrambling module needs to be used in pairs,one attachs to the FPV transmitter, and the other to the video receiver.
• FPGA digital encryption and decryption processing, with high-intensity 32-bit password(up to 232).
• Supports PAL and NTSC analog video stream encryption and decryption, applicable to various flight visual cameras, Thermal imaging cameras, etc.
• Through the setting of the dip switch, the same hardware can be used for scrambling descrambling operations.
• Encryption and decryption passwords can be set through serial port.
• Suitable for any FPV VTX, scrambling on the video cable square layout, suitable for assembly with VTX.
• Upgrade FPV security.
• Prevent others from viewing your private videos.

Specification:

Video encryption principle

It collects CVBS video and performs the conversion from analog to digital, the converted digital signal is encrypted through FPGA, reprocess the video image, then output it for digital to analog conversion, finally it is converted into standard CVBS format and output to the transmitter.

Video decryption principle

The CVBS video signal received by the receiver will undergo analog to digital conversion,decrypt the converted digital signal through FPGA, reprocess the video image, then output it for digital to analog conversion, finally it will be converted into standard CVBS output and displayed on the screen.

FPV Video Scrambler Hardware description

The size of the module is 34.5*34.5mm, the top height is within 3mm,bottom height is within 1mm, board thickness is 1.2mm. The diameter of the fixing holes on the four corners is 2.5mm. The weight is 4.3 grams.

Dial switch

To set whether the FPV video scrambler module worked as an encryption or decryption function module. When the dip switch is turned to "on" (as shown in the above picture, turned to the left), it is used as an encryption function module. When the dip switch is turned to "I" (as shown in the above picture, turned to the right), it is used as a decryption function module.

Serial port (Control UART)

TTL 3.3V serial port is used to set encryption/decryption passwords. You can connect to a computer (or upper MCU) through a USB to TTL UART dongle and send AT commands to set encryption/decryption passwords. The serial port also reserves a 3.3V external power supply pin, with a maximum power supply current of 500mA. The serial port baud rate is fixed at 115200, with 8-bit data bits, 1-bit stop bits, and no parity check bits.

The video frame after encryption and decryption processing

Original CVBS video Encrypted video Encrypted and decrypted video