The Mavic uses DJI’s newly developed OcuSync transmission system. Part of the Lightbridge family, OcuSync performs far better than Wi-Fi transmission at all transmission speeds. OcuSync also uses more effective digital compression and channel transmission technologies, allowing it to transmit HD video reliably even in environments with strong radio interference. Compared to traditional analog transmission, OcuSync can transmit video at 720p and 1080p – equivalent to a 4-10 times better quality, without a color cast, static interference, flickering or other problems associated with analog transmission. Even when using the same amount of radio transmission power, OcuSync transmits further than analog at 4.1mi (7km)*.OcuSync goes even further than optimizing the communication mechanism and parameters of aerial imaging. There are several video transmission systems on the market claiming to offer video transmission with zero latency. However, it should be noted that the physical layer of those transmission systems is too simple to adapt to changes in the environment. When affected by signal interference, the image quality of the video being transmitted will fall sharply. This means these systems are not suitable for far field transmissions and transmissions in interference-heavy environments. Also, because these video transmission systems are not integrated into the whole system, latency will immediately start to rise up from 0 when working with devices including cameras and displays. OcuSync is able to strike a perfect balance between latency and receptivity, reducing latency to 5ms for remote controller transmission commands, 10ms for video data and 130ms for videos. More than low enough to ensure that Mavic is able to fly reliably despite interference. OcuSync’s integration with video processing, coding, and signal transmission systems also make it more cost effective.Before taking off, OcuSync will automatically scan the environment and choose the frequency band with the lowest interference, ensuring more stable video transmission. During a flight, it sends key flight parameters back for viewing in the DJI GO 4 app and supports a maximum download speed of 40Mb/s for photos and videos.There are many Wi-Fi based transmission systems available on market. However, the experience of using OcuSync is completely different. As Wi-Fi was primarily designed to connect electronic devices locally, it works best when connecting to nearby devices. As it was designed for short range, Wi-Fi systems use low cost transmitters that suffer from weak data links. This means that a Wi-Fi cannot detect weak signals or signals with interference. OcuSync however, uses many cutting-edge communication industry technologies to outperform Wi-Fi in terms of sensitivity, anti-interference, and anti-fading, as well as when flying at high speed. It also supports simultaneous connection to multiple devices.In use, this is the difference between smooth or interrupted transmission, short or long flight range, and short or long recovery times after interference or GPS signal loss. Additionally, since Wi-Fi uses a traditional protocol stack, it takes longer - from several seconds to tens of seconds – to get connected and to re-connect after signal loss But OcuSync uses Cross-Layer Protocol Design, it can establish or re-establish links within one second.As well as point-to-point video transmission, OcuSync also supports wireless connections to multiple devices. For example, you can connect the DJI Goggles, remote controller, and Mavic wirelessly to OcuSync all at the same time. You can also add an additional remote so that you can control the Mavic with two remotes or share First Person View (FPV) videos.* Unobstructed, free of interference, when FCC compliant.
FLY BY PHONE
Sometimes a phone is all you need to fly. Not only does the Mavic support flying on your phone with Virtual Joysticks, but you also have full access to all of its Intelligent Flight Modes — TapFly, Trace, Spotlight, and Profile. Using just your phone, you can capture photos and video so incredible, that no one will believe you did it just by tapping a screen!
AT YOUR COMMAND
The slightest movement of your fingers on the Mavic’s control sticks is translated almost immediately into movement in the air, so you always feel in complete control. Its powerful motors and expertly optimized propellers, provide more power than you would expect for its size, making it able to fly smoothly in up to 24mph (38.5kph) winds.Sport Mode was designed for fun, giving the Mavic a top speed of 40mph (65kph), all the while ramping up agility and responsiveness, to give you a taste of drone racing. You can also use it to film something fast, or zip out to catch a shot before the moment passes. Even in Sport Mode, the Mavic will stop almost instantly if you let go of the controls, so no matter how fast you go, you can stop at any time.
4K ULTRA HD VIDEO
Electronic Image Stabilization (EIS) is a shake reduction technology based on image cropping. It is particularly popular among compact and small drones since they can be made more simply by replacing a 3-axis gimbal stabilized camera with a fixed camera and EIS. EIS works by cropping edges from a 4K image, and can theoretically create a smooth full HD 1080p video from an original 4K video. However, EIS is unable to completely eliminate shaking and introduces ripples in both photos and videos. In drones, EIS has three main problems:
1. EIS systems cannot shoot 4K or high frame rate video because cropping is necessary to reduce shake, and the amount of cropping will vary depending on the amount of movement. As 4K is currently the highest definition available for most cameras, 4K (or even 2.7K video) cannot be shot while using EIS. Additionally, as it takes time to process the cropping, recording video at high framerates is not possible, resulting in only 1080p video at 30fps.
2. Shooting perspectives cannot be controlled precisely. Without a gimbal, drones are forced to use a fisheye lens to allow shooting angle changes, but changing the angle only uses part of the camera view, negatively affecting the shooting experience.
3. Black edges may be introduced in the video in flight during a severe maneuver. This occurs because EIS technology clips beyond the edge of the video in an effort to keep the image stable.To provide true 4K aerial video and a smooth live feed, the Mavic Pro is equipped with the smallest high-precision 3-axis gimbal that DJI has ever made. With brushless motors on all three axes, the gimbal can control the camera with precision, adjusting it to eliminate shake caused by movement from the Mavic. This 4K camera uses core technologies found in all DJI cameras. It is equipped with a 1/2.3 inch CMOS image sensor, commonly found in professional sports cameras, and an aerial imaging optimized integrated lens with an equivalent focal length of 28mm. It shoots smooth 4K video at 30fps, 1080P video at 96fps and 12-megapixel photos.