Global Fly Technologies
VIDEO SIGNAL MASKING
DIGITAL SCRAMBLER WITH DECODING/ENCODING
VIDEO SIGNAL MASKING
for FPV drone
1. PRINCIPLE OF OPERATION
The principle of operation of the analog video signal scrambler for a drone can be described as follows:
1. Input video signal
The scrambler receives the input analog video signal from the drone's camera. This signal is usually in NTSC or PAL format.
2. Scrambling
At this stage, the scrambling process itself takes place:
  • Encoding: The video signal is encoded using algorithms that mix and modify its structure. This is done by setting a code key.
3. Output signal
After scrambling, the signal is transmitted to the transmitter, which sends it to the receiver.
The output signal will appear as a random set of data and will not be perceived as normal video.
4. Decoding on the receiving side
On the receiver side, a decoder is used that performs the reverse operations:
  • Decoding: Application of algorithms similar to those used in the scrambling process to restore the original video signal.
As a result, the original video signal is restored on the receiving side, which can be displayed on the screen or recorded.
This process provides protection of the video signal from interception and unauthorized viewing, which is especially important for drones operating in high-security environments.
2. ADVANTAGES COMPARED TO INVERTER
2.1. Level of protection
Scrambler: uses complex coding algorithms and adds noise, which significantly complicates the task of intercepting and analyzing the signal. Even if someone catches the signal, it will be a random set of data.
Inverter: although inversion hides the image, it does not provide the same degree of protection, as the signal can still be restored using simple decoding methods.
2.2. Complexity of recovery
Scrambler: recovering the original video signal requires knowledge of the code key and decoding algorithms, making it more secure against unauthorized access.
Inverter: restoring the original signal from the inverted image may be easier and does not require special knowledge.
2. ADVANTAGES COMPARED TO INVERTERS (CONTINUED)
2.3. Flexibility and Adaptability
Scrambler: allows you to configure the encryption level and add various types of noise, which makes it possible to adapt to specific security conditions and requirements. Inverter: has a fixed inversion method that cannot be changed, which limits its adaptation to new threats.
2.4. Compatibility and Integration
Scrambler: easily integrates with modern digital systems and data transmission protocols, making it versatile for use in modern drones.
Inverter: is typically used in analog systems, which may limit its application in digital networks.
2.5. Protection against Attacks
Scrambler: complex encryption algorithms make it more resistant to various types of attacks, including signal analysis attacks.
Inverter: is less protected from such attacks, as image restoration can be accomplished without significant effort.
2.6. Signal Quality
Scrambler: when used correctly, it can maintain high video signal quality even when transmitted through complex communication channels.
Inverter: can lead to image quality loss, as inversion itself does not improve the signal.
2.7. AVAILABILITY OF ADAPTER FOR GOGGSLES
A universal adapter that can be installed on SKYZONE glasses. The presence of a mechanical (manual) function to turn off the scrambler function using a toggle switch. Video signal inputs and outputs, as well as external power, for the convenience of installing various video receivers and repeaters, as well as for convenient installation in extensions and ground stations.
These advantages make the scrambler with video encryption a more preferred choice for ensuring the security of video signals, especially in conditions of increased threat of interception.
3. CONNECTION DIAGRAM
3.1. CONNECTION DIAGRAM TO FLIGHT CONTROLLER
3.2. CONNECTION DIAGRAM TO VIDEO RECEIVER
4. SCRAMBLER SETUP
1
1. Preparation for setup
  • Install on drone / receiver
  • Connect power
  • Connect programmer
2
2. Select function
  • Encryption - for installation on the drone
  • Decryption - for installation on the video receiver
3
3. Key setup
The code must be the same for the receiving and transmitting device
4
4. Port setup and programming
  • Select the TTL programmer's COM port
  • Read - read the scrambler settings
  • Write - write the scrambler settings
5. ADAPTER FOR SCRAMBLER INSTALLATION
Designed for installing the scrambler in SKYZONE 04 and COBRA goggles. This adapter significantly simplifies the use of the scrambler with various FPV systems.
Front view
Main connector for connecting the STADYVIEW V3.3 receiver from SKYZONE goggles. Compact design provides easy installation.
Power connectors
Supports external power from 4S to 6S for use in remote systems.
Programmer
Convenient programmer for setting a password on the video signal.
Installation on goggles
Full compatibility with SKYZONE 04 and COBRA goggles. Integrated solution for secure video signal transmission.
Contacts
Email: sales@gflytech.co
Phone: +86-198-6414-9989
Address: Building A, Cai Tian Road, Futian Street, Futian District, Shenzhen City
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WhatsApp: @gflytech
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