The present group of inventions relates to methods and systems for positioning underwater objects, and more particularly to methods and systems in which satellite signals are received by receivers disposed on sonar buoys, the coordinates of the sonar buoys are determined by means of computation modules on the sonar buoys, location data and identification data are transmitted in the form of sonar signals emitted by transmitters on the sonar buoys, the signals are received with the aid of a receiver disposed on an underwater object, and the coordinates of the underwater object are determined according to the time delay of receipt of the sonar signals from the sonar buoys, the location of which is known. The present solution can be used in simultaneously determining the geographical position of an unlimited number of mobile underwater objects, remotely operated underwater vehicles, divers, marine animals, etc. in motion. According to the invention, signals from the aforementioned sonar buoys are encoded in the form of periodic signals tethered to GPS/GLONASS clocks, all transmitters of the sonar signals are disposed at the same depth, and during decoding of the signals from the sonar buoys, direct signals from the sonar buoys are isolated from reflected signals. The system implements the aforementioned method. The achieved technical result is more accurate positioning of the underwater objects.

A system includes a plurality of transmitters, in which each transmitter is configured to transmit an ultrasonic acoustic signal and at least one ultrasonic acoustic signal is a modulated ultrasonic acoustic signal. The system also includes a mobile device comprising a processor, a receiver, and instructions stored on a non-transitory memory, so that when the instructions are executed by the processor, the instructions cause the mobile device to receive the ultrasonic acoustic signal, calculate a position of the mobile device based upon one or more characteristics of the ultrasonic acoustic signals, and demodulate the modulated ultrasonic acoustic signal to obtain an information data stream.

A system includes a plurality of transmitters, in which each transmitter is configured to transmit an ultrasonic acoustic signal and at least one ultrasonic acoustic signal is a modulated ultrasonic acoustic signal. The system also includes a mobile device comprising a processor, a receiver, and instructions stored on a non-transitory memory, so that when the instructions are executed by the processor, the instructions cause the mobile device to receive the ultrasonic acoustic signal, calculate a position of the mobile device based upon one or more characteristics of the ultrasonic acoustic signals, and demodulate the modulated ultrasonic acoustic signal to obtain an information data stream.

Techniques for positioning using acoustic tags are provided. An example method for determining a location of a mobile device includes receiving acoustic tag information with the mobile device, the acoustic tag information is associated with an appliance, detecting an acoustic signal with the mobile device, determining a correlation value for the acoustic signal and the acoustic tag information, identifying at least one appliance and a corresponding appliance location based on the correlation value, and determining the location of the mobile device based at least in part on an appliance location.

A body part movement detection system and method, for use in training for a sport in carrying out a swing in a target direction, includes a transmitter configured to transmit signals over the course of the swing, using a form of radiation consisting of acoustic and electromagnetic, a first detector configured to receive the signals from the transmitter and to produce a first output related to a first distance of the body part to a first reference location, a controller configured to receive successive first outputs from the detector and to evaluate the successive first outputs in relation to at least one previous first output, to determine whether the body part has experienced motion having a component in the target direction by an amount in excess of a threshold, and an alert system configured to generate an alert to the user when the body part has experienced such motion.

A body part movement detection system and method, for use in training for a sport in carrying out a swing in a target direction, includes a transmitter configured to transmit signals over the course of the swing, using a form of radiation consisting of acoustic and electromagnetic, a first detector configured to receive the signals from the transmitter and to produce a first output related to a first distance of the body part to a first reference location, a controller configured to receive successive first outputs from the detector and to evaluate the successive first outputs in relation to at least one previous first output, to determine whether the body part has experienced motion having a component in the target direction by an amount in excess of a threshold, and an alert system configured to generate an alert to the user when the body part has experienced such motion.

A system and method for location positioning with steganographic encoded data streams in audible-frequency range audio is disclosed. The method comprises encoding, modulating and audio-hiding data streams into corresponding audible-frequency range steganographic audio signal; transmitting each audio signal by a corresponding loudspeaker, wherein each data stream includes the geographic location of the corresponding loudspeaker, a time stamp of transmission of periodic frames of the data stream and the like. In addition, a mobile device is used for: acquiring an audio signal that includes the transmitted audio signals; separating, demodulating and decoding the data streams therefrom; calculating the distance between the mobile device and each of the loudspeakers based on the time of flight between transmission and acquisition of each of the audio signals; and estimating the geographic location of the mobile device based on the distance between the mobile device and the loudspeakers and the geographic location of the loudspeakers.

A system and method for location positioning with steganographic encoded data streams in audible-frequency range audio is disclosed. The method comprises encoding, modulating and audio-hiding data streams into corresponding audible-frequency range steganographic audio signal; transmitting each audio signal by a corresponding loudspeaker, wherein each data stream includes the geographic location of the corresponding loudspeaker, a time stamp of transmission of periodic frames of the data stream and the like. In addition, a mobile device is used for: acquiring an audio signal that includes the transmitted audio signals; separating, demodulating and decoding the data streams therefrom; calculating the distance between the mobile device and each of the loudspeakers based on the time of flight between transmission and acquisition of each of the audio signals; and estimating the geographic location of the mobile device based on the distance between the mobile device and the loudspeakers and the geographic location of the loudspeakers.

A range-finding and/or object-positioning system comprises one or more target devices; one or more reference devices communicating with said one or more target devices via one or more wireless signal sets, each wireless signal set comprising at least a first-speed signal having a first transmission speed and a second-speed signal having a second transmission speed, and the first transmission speed being higher than the second transmission speed; and at least one processing unit performing actions for determining at least one distance between one target device and one reference device based on the time difference between the receiving time of the first-speed signal and the receiving time of the second-speed signal of the wireless signal set communicated between said reference and target devices.

Disclosed is a system and method for generating a model of the geometric relationships between various audio sources recorded by a multi-camera system. The spatial audio scene module associates source signals, extracted from recorded audio, of audio sources to visual objects identified in videos recorded by one or more cameras. This association may be based on estimated positions of the audio sources based on relative signal gains and delays of the source signal received at each microphone. The estimated positions of audio sources are tracked indirectly by tracking the associated visual objects with computer vision. A virtual microphone module may receive a position for a virtual microphone and synthesize a signal corresponding to the virtual microphone position based on the estimated positions of the audio sources.