<P> Kinect for Xbox 360 was a combination of Microsoft built software and hardware . The hardware included a range chipset technology by Israeli developer PrimeSense, which developed a system consisting of an infrared projector and camera and a special microchip that generates a grid from which the location of a nearby object in 3 dimensions can be ascertained . This 3D scanner system called Light Coding employs a variant of image - based 3D reconstruction . </P> <P> The Kinect sensor is a horizontal bar connected to a small base with a motorized pivot and is designed to be positioned lengthwise above or below the video display . The device features an "RGB camera, depth sensor and multi-array microphone running proprietary software", which provide full - body 3D motion capture, facial recognition and voice recognition capabilities . At launch, voice recognition was only made available in Japan, United Kingdom, Canada and United States . Mainland Europe received the feature later in spring 2011 . Currently voice recognition is supported in Australia, Canada, France, Germany, Ireland, Italy, Japan, Mexico, New Zealand, United Kingdom and United States . The Kinect sensor's microphone array enables Xbox 360 to conduct acoustic source localization and ambient noise suppression, allowing for things such as headset - free party chat over Xbox Live . </P> <P> The depth sensor consists of an infrared laser projector combined with a monochrome CMOS sensor, which captures video data in 3D under any ambient light conditions . The sensing range of the depth sensor is adjustable, and Kinect software is capable of automatically calibrating the sensor based on gameplay and the player's physical environment, accommodating for the presence of furniture or other obstacles . </P> <P> Described by Microsoft personnel as the primary innovation of Kinect, the software technology enables advanced gesture recognition, facial recognition and voice recognition . According to information supplied to retailers, Kinect is capable of simultaneously tracking up to six people, including two active players for motion analysis with a feature extraction of 20 joints per player . However, PrimeSense has stated that the number of people the device can "see" (but not process as players) is only limited by how many will fit in the field - of - view of the camera . </P>

The depth sensor of the kinect uses what type of projector