Abstract: A method to calibrate an imaging array of a time-of-flight depth camera includes the act of modulating emission from a light source of the camera while synchronously biasing the imaging array. In this method, the modulated emission reflects from a compact reflector positioned a known distance from the camera and passes through an optical diffuser en route to the imaging array. For each pixel of the imaging array, a correction term is stored, which brings the output from that pixel into agreement with the actual distance between the camera and the compact reflector.

Abstract: Embodiments disclosed herein are directed to time-of-flight (TOF) systems, and methods for use therewith, that substantially reduce interference that the TOF system may cause to at least one other system that is configured to wirelessly receive and respond to IR light signals. Some such embodiments involve emitting IR light having a low frequency (LF) power envelope that is shaped to substantially reduce frequency content within at least one frequency range known to be used by at least one other system that may be in close proximity to the TOF system. Such embodiments can also involve detecting at least a portion of the emitted RF modulated IR light that has reflected off one or more objects. A TOF system can produce depth images in dependence on results of the detecting, as well as update an application in dependence on the depth images.

Abstract: A method to calibrate an imaging array of a time-of-flight depth camera includes the act of modulating emission from a light source of the camera while synchronously biasing the imaging array. In this method, the modulated emission reflects from a compact reflector positioned a known distance from the camera and passes through an optical diffuser en route to the imaging array. For each pixel of the imaging array, a correction term is stored, which brings the output from that pixel into agreement with the actual distance between the camera and the compact reflector.

Abstract: Embodiments disclosed herein are directed to time-of-flight (TOF) systems, and methods for use therewith, that substantially reduce interference that the TOF system may cause to at least one other system that is configured to wirelessly receive and respond to IR light signals. Some such embodiments involve emitting IR light having a low frequency (LF) power envelope that is shaped to substantially reduce frequency content within at least one frequency range known to be used by at least one other system that may be in close proximity to the TOF system. Such embodiments can also involve detecting at least a portion of the emitted RF modulated IR light that has reflected off one or more objects. A TOF system can produce depth images in dependence on results of the detecting, as well as update an application in dependence on the depth images.

Abstract: A phase-based TOF system is operated with N?3 modulation frequencies fi. These frequencies can be changed during N time intervals that together define an exposure time for the TOF pixel array. Preferably N=3 and modulation frequencies f1, f2, f3 are used, where f1=?m1, f2=?m2, and f3=?m3, where m1, m2, and m3 are small integers co-prime to each other, and a is a coefficent. A first phase image is acquired during perhaps the first third of exposure time using f1, then for the next third of exposure time a second phase image is acquired using f2, and then f3 is used to acquire a third phase image during the last third of exposure time. Geometric analysis yields desired values for m1, m2, and m3 to unwrap and thus disambiguate phase. Identification of valid and invalid data is identified using dynamically adjustable error tolerances.

Abstract: According to the present invention, there is provided a telecommunication Private Wire network comprising: a centralised switch and a number of locations with corresponding end points each of which is connected to said centralised switch by one or more dynamic Private Wires, said centralised switch including means for identifying each location and the end points within that location, a directory for storing details of each location and the corresponding end points, a directory search mechanism and a control means coupled to said identifying means, said directory and said directory search mechanism for receiving an invite from a requesting end point at one of the locations, using the directory search mechanism to identify the receiving end point at a location and the requesting end point at a location in said invite and for establishing a virtual Private Wire between said receiving end point at a location and said requesting end point at a location.