Abstract: Methods are generally described for inaudible orthogonal signal communication. An example method includes determining, based on an input message, a series of symbols, where each symbol from the series of symbols represents a numerical value, wherein each symbol from the series of symbols corresponds to a band-limited white noise tone orthogonal to each other band-limited white noise tone corresponding to each other symbol. The example method also includes generating a sub-token comprising each symbol from the series of symbols, where each symbol overlaps in time with at least one other symbol. The example method also includes modulating a carrier wave with the sub-token to produce a signal audio waveform, where the modulation uses a spread spectrum technique, and providing the signal audio waveform to a television device, where the television emits the signal audio waveform as a low-amplitude audio signal.

Abstract: Systems and methods are provided for presenting secondary content. Particularly, the secondary content may be presented on a first device (such as a smartphone, for example) and may be based on primary content that is being presented to the user via a second device. For example, if a product is shown during a television show being presented to the user via a television, and the user desires to view additional information about the product, the user may interact with a smartphone application. Based on the interaction, the first device may being processing audio produced by the television. Embedded within the primary content may be a number of “tones” that include frequencies that are inaudible to humans. The first device may detect a tone and the tone may be decoded to obtain a timestamp associated with the primary content. This timestamp may then be used to determine which secondary content associated with that timestamp to present to the user on the first device.

Abstract: Technologies directed to providing a wireless chipset with integrated radar for presence detection and localization are described. A first wireless device uses a transmit (TX) chain to send data to a second wireless device. The first wireless device generates a chirp signal and uses the TX chain to send the chirp signal. A receive (RX) chain of the first wireless device receives reflected signals corresponding to the chirp signal. The first wireless device determines digital values using the reflected signals and the chirp signal. The first wireless device determines that an environment in which the first wireless device is located has been disrupted by an object using the digital values.