1
Danny D Lowe, Terry Cashion, Simon Williams: Stereo headphone sound source localization system. QSound Labs, Jay H Maioli, December 6, 1994: US05371799 (101 worldwide citation)

A system for processing an audio signal for playback over headphones in which the apparent sound source is located outside of the head of the listener processes the input signal as if it were made up of a direct wave portion, an early reflections portion, and a reverberations portion. The direct wav ...


2
Gerard Dirk Smits: Teleconferencing method and apparatus with three-dimensional sound positioning. QSound Labs, Sheridan Ross P C, September 26, 2000: US06125115 (64 worldwide citation)

A computer network teleconferencing system is provided in which audio signals are coupled to or associated with source indicators, such as source addresses in TCP protocol packets. Three-dimensional spatialization transforms are applied to audio data according to the source of such data so that, upo ...


3
Brian Cowieson, Terry K Cashion, John Arthur, Simon Williams: Full sound enhancement using multi-input sound signals. QSound Labs, Fulbright & Jaworski L, May 22, 2001: US06236730 (29 worldwide citation)

Input sound signals are accepted for presentation to a plurality of speakers where the number of physically present speakers is less than the number of input sound signals. The accepted signals are expanded and summed in a manner such that a listener perceives sounds as coming from the same number o ...


4
Terry Cashion, Simon Williams: Apparatus for creating 3D audio imaging over headphones using binaural synthesis. QSound Labs, Fulbright & Jaworski L, September 15, 1998: US05809149 (29 worldwide citation)

An apparent location of a sound source is controlled in azimuth and range to a listener of the sound using headphones by a range control block that has variable amplitude scalers and a time delay and by an azimuth control block that also has variable amplitude scalers and time delays. An input audio ...


5
Robin Norman Dymond, Abram Gamer: Method and apparatus for localization enhancement in hearing aids. QSound Labs, Fulbright & Jaworski L, February 9, 1999: US05870481 (29 worldwide citation)

A method and apparatus to enhance or improve the sound localization properties of hearing aids determines the interaural level differences required for localizing sounds to a specific point of origin. These determined interaural level differences are then used in the adjusting and fitting of the hea ...


6
Brian Cowieson, John Arthur, Terry Cashion: Qsound surround synthesis from stereo. QSound Labs, Fulbright & Jaworski L, March 6, 2001: US06198826 (24 worldwide citation)

The inventive mechanism produces multiple output signals from a two-channel stereo input signal. The mechanism produces a first pair of output signals which retain the monaural information in the stereo input signal. The first pair of signals each comprise a combination of one of the input channels ...


7
Terry Cashion, Simon Williams: Apparatus for creating 3D audio imaging over headphones using binaural synthesis including elevation. QSound Labs, Fulbright & Jaworski L, July 16, 2002: US06421446 (22 worldwide citation)

The apparent location of sound signals as perceived by a person listening to the sound signals over headphones can be positioned or moved in azimuth, elevation and range by a range control block and a location control block. Several range control blocks and location control blocks can be provided de ...


8
John Eric Arthur: Matrix surround decoder/virtualizer. Qsound Labs, Fulbright&Jaworski, February 21, 2006: US07003119 (16 worldwide citation)

The inventive mechanism uses several sub-systems to generate outputs from the stereo input signal. A first sub-system synthesizes the phantom center output, which places the monaural center image between the left and right speakers in front of the listener. A second sub-system synthesizes the virtua ...


9
Terry K Cashion, Simon Williams, John Arthur, Mark Williams: Method and system for sound expansion. QSound Labs, Fulbright & Jaworski L, October 26, 1999: US05974153 (13 worldwide citation)

Monaural inputs are accepted for presentation to a pair of speakers. The output sound image from that pair of speakers is such that a listener will perceive that the sound is stereo and that certain sounds come from a non-existent center speaker and that other sounds come from locations beyond the p ...


10
Danny D Lowe, Scott Willing, William Gonnason, Mark Williams, Don Lafont: Stereo enhancement system including sound localization filters. QSound Labs, Fulbright & Jaworski L, June 30, 1998: US05774556 (10 worldwide citation)

The sound field in a stereo reproduction system is enhanced by a preprocessor that removes a portion of the audio information that is common or substantially common to both the left and right stereo input signals before processing the signals in left and right sound placement filters. The left and r ...



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