SCALABLE, LOW-LATENCY, RADIO & INERTIAL-BASED

Camera tracking for
broadcast TV, live events
and virtual production

AirPixel is a camera tracking solution for AR in broadcast TV and live events, in-camera VFX on Virtual Productions in LED volumes and for Simulcam in greenscreen studios.

It provides precise position along with tilt/pan/roll values and directly integrates FIZ data and genlock.

AirPixel seamlessly integrates with Unreal Engine and other render platforms such as Disguise, Pixotope and Zero Density.

Based on ultra-wideband (UWB) and inertial indoor tracking technology originally developed for the demanding automotive industry, AirPixel has a fast set-up time, is easy to use, and scales to very large indoor and outdoor venues such as studio hangars and open air stadiums as ambient light has no effect.

Features

Position, pan, tilt & roll (6DOF)

AirPixel provides accurate pan, tilt and roll plus X, Y, Z position up to 100 times a second. Advanced filtering is used, combining inertial sensor and UWB data to significantly reduce drift.

No lighting restrictions

AirPixel works in all weather conditions including bright sunlight, rain, mist or total darkness. With an IP rating of 67, the beacons can be safely placed outside without risking weather damage.

Highly scalable

AirPixel covers stages of virtually unlimited size without any deterioration in position quality. Up to 250 beacons and 5 rovers can be deployed in a single setup. Beacons can be placed up to 50 meters apart.

No line of sight required

Using radio (UWB) rather than optical tracking, AirPixel beacons can be placed behind a green/blue screen.

FIZ data and genlock integration

AirPixel can read the focus, iris and zoom values from a variety of cameras and controllers. AirPixel integrates FIZ data and genlock to provide a complete data set to the render engine.

Supports popular rendering platforms

AirPixel seamlessly integrates with Unreal Engine and other popular rendering solutions such as Pixotope, Disguise d3, Zero Density and MotionBuilder. Data is output using AirPixel or FreeD protocol.

Quick to deploy

The initial setup can be done in several hours depending on stage complexity and the re-initialisation takes only 2 minutes after power up.

Low latency

AirPixel is a low latency system suitable for all real-time applications. All data is processed on camera and transmitted with as little as 20 ms latency.

SMALL PAYLOAD

AirPixel uses a small receiver placed on the camera, plus a compact control unit, weighing a combined 600 g (1.3 lb). No further processing is required.

Showcase

Julian Thomas, Managing Director at RACELOGIC, the company behind AirPixel, explains how AirPixel is being used as a tracking system to capture the position and orientation of the camera in Virtual Productions and Motion Capture.

AirPixel supports popular rendering solutions such as Unreal Engine, MotionBuilder, and Disguise d3, with new support always being added. Talk to us about how we can integrate with your workflow today.

This is the latest demo video of the UWB/IMU based camera tracking solution, generated in real-time with no post-processing.

In this setup, the position and orientation are being calculated on the receiver on top of the camera. The AirPixel system updates at 100 Hz, but the output to the camera and computer is genlocked at 30 fps.

The tracking data is fed into Unreal which is generating the virtual studio, and the green screen video with the graphics is composed using an Ultimatte 12. AirPixel can also read the focus, iris and zoom values from a variety of cameras and controllers and feed this into Unreal.

This video shows the ARRI stage in Uxbridge, where 12 UWB beacons have been placed around the top of the walls and on various locations around the sides.

The position and rotation of the camera is being measured by the AirPixel system on the camera and sent to the Unreal Engine, which then generates the graphics being presented on the walls. The perspective of the trees changes as the camera tracks in front of the car to give the impression of a real 3D environment from the camera’s perspective.

The in-camera effects are immediate and very realistic, saving a lot of time in post-production, with many obvious benefits to cost and workflow.

AirPixel works by utilising a collection of stand-alone beacons, which can be battery or permanently powered. Using ultra-wideband radio (UWB) they communicate with an on-camera receiver and control unit which calculates accurate position and orientation.

The beacons are placed around the perimeter of the stage, then surveyed using a high-speed robotic total station and bespoke in-house software. Using this method, it is possible to set the beacon locations with millimetre accuracy, allowing AirPixel to perform optimally.

The AirPixel camera tracking solution consists of a small rover placed on top of the camera and a minimum of 8 beacons placed around the stage.

All beacons are completely stand-alone, and the option of battery power makes deployment very rapid. A UWB receiver on the target object communicates with the beacons and uses trilateration to determine its position. This data is combined with the measurements from a highly accurate inertial measurement system, proving real-time, 3D position to within 2 cm.

The internal inertial measurement unit also calculates pan, tilt, and roll. The rover is also connected to a control unit, which integrates FIZ data and genlock to provide a complete data set to a render engine.

The AirPixel camera tracking solution consists of a small rover placed on top of the camera and a minimum of 8 beacons placed around the stage.

AirPixel works with many camera rigging systems, having been used on dolly, Steadicam, jibs, and cranes. It fully integrates with popular 3rd party products such as the Camera Revolution Libra stabilised head, combining the UWB position data with encoded orientation values. This means that accurate data can be provided on shots where occlusions may traditionally make tracking difficult.

Specifications

Update rate max. 100 Hz
Output rate Genlocked 23.98, 24, 25, 29.97, 29.97 Drop,
30,47.95, 48, 50, 59.94, 59.94 Drop, 60
Position accuracy X: ±2 cm
Y: ±2 cm
Z: ±10 cm
Angular Accuracy Tilt : ±0.2°
Roll: ±0.2°
Pan : ±0.5°
Latency 50 ms
Positional resolution 1 mm
Protocol support AirPixel or FreeD
Max. tracking speed 270 km/h; 75 metres per second
Max. number of receivers 5 (per UWB channel)
Max. number of beacons 200 (per UWB channel)
Max. coverage
(assuming 30 m beacon spacing and square volume)
390 m x 390 m
152,100 m2
1.6 million ft2
UWB Channels Channel 4 – 3993.6 MHz ±450 MHz
Channel 7 – 6489.6 MHz ±450 MHz
UWB Transmit Power -41.3 dBm/MHz
Rover dimensions 7 x 4 cm
Beacon dimensions 13 x 7.5 cm
Power requirements 7 - 30 V DC, 100 mA
IP rating Beacon: IP67
Rover: TBC
Operating Temperature -20˚C to +60˚C
Storage Temperature -40˚C to +85˚C
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