User Manual of Video Encryption & Decryption Equipment

1：Principle of video encryption：

After collect CVBS videos and perform AD (analog-to-digital) conversion. The converted digital signal is encrypted through FPGA, and the video image is reprocessed. Then perform DA(digital-to-analog) conversion to generate a standar CVBS and output to the transmitter as shown in Figure (1)

2：Principle of video decryption：

We perform AD (analog-to-digital) conversion with the CVBS video signal received by the receiver, decrypt the converted digital signal through FPGA, reprocess the video image, and then output it for DA (analog-to-digital) conversion to convert it into standard CVBS and output it to the display as shown in Figure (1)

Principle diagram as below:

3：Parameter setting:

3.1：Open the configuration software, find the corresponding serial port number (Figure 2), select and open the serial port (Figure 3), click "read" to read the current device parameters

3.3：Press "Write" to write data as shown in Figure 7

4.1：Scrambling connection

Each pin definition

1：DC  GND

2：DC  5-15V

3：Video  GND

4：Video  in（Connect to the camera or flight control OSD output）

5：Video  GND

6：Video  out（connect Tx）

7：TTL TXD

8：TTL GND

9：TTL RXD

2：Descrambling connection

Each pin definition：

1：DC  GND

2：DC  5-15V

3：Video  GND

4：Video  in（connect with Rx video  out）

5：Video  GND

6：Video  out（connect with display/VR）

7：TTL TXD

8：TTL GND

9：TTL RXD

Explanation of special circumstances: Due to the differences in the video range of the camera, video transmitter, and video receiving machine from different manufacturers, there may be differences in the video brightness when used.If this occurs, please follow the steps below to modify the module.