Patents Assigned to DTS, Inc.
  • Patent number: 10334358
    Abstract: A user device can be used to correct for a latency of a speaker. The user device can communicate an indication to the speaker to play a sound at a first time. The user device can record a second time at which a microphone on the user device detects the sound. The first and second times can be synchronized to a clock of a computer network. The user device can compare the first and second times to determine a latency of the speaker. The user device can communicate adjustment data corresponding to the determined latency to the speaker. The speaker can use the adjustment data to correct for the determined latency. In some examples, the user device can display instructions to position the user device a specified distance from the speaker, and can account for a time-of-flight of sound to propagate along the specified distance.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: June 25, 2019
    Assignee: DTS, Inc.
    Inventor: Dannie Lau
  • Patent number: 10313817
    Abstract: Embodiments of systems and methods are described for estimating a position of a loudspeaker and notifying a listener if an abnormal condition is detected, such as an incorrect loudspeaker orientation or an obstruction in a path between the loudspeaker and a microphone array. For example, a front component of a multi-channel surround sound system may include the microphone array and a position estimation engine. The position estimation engine may estimate the distance between the loudspeaker and the microphone array. In addition, the position estimation engine may estimate an angle of the loudspeaker using a first technique. The position estimation engine may also estimate an angle of the loudspeaker using a second technique. The two angles can be processed to determine whether the abnormal condition exists. If the abnormal condition exists, a listener can be notified and be provided with suggestions for resolving the issue in a graphical user interface.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: June 4, 2019
    Assignee: DTS, Inc.
    Inventors: Guangji Shi, Michael M. Goodwin, Edward Stein
  • Patent number: 10299040
    Abstract: A system can be provided for increasing loudness of an audio signal to present a perceived loudness to a listener that is greater than a loudness provided natively by a loudspeaker. The system can include one or more of the following: a frequency suppressor, a loudness adjuster, an equalizer, and a distortion control module. The frequency suppressor can increase headroom in the audio signal by filtering out low and/or high frequencies. The loudness adjuster can calculate a loudness of the audio signal and apply a gain to the audio signal to increase the loudness. The equalizer can further increase headroom by attenuating portions of a passband of the loudspeaker's frequency response. The distortion control module can induce partial harmonic distortion in the audio signal to further increase loudness.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: May 21, 2019
    Assignee: DTS, Inc.
    Inventors: Sarah Yang, Richard J. Oliver, Robert C. Maling, III, Aaron Warner
  • Patent number: 10251016
    Abstract: Systems, devices, and methods are described herein for adjusting a relationship between dialog and non-dialog signals in an audio program. In an example, information about a long-term dialog balance for an audio program can be received. The long-term loudness dialog balance can indicate a dialog-to-non-dialog loudness relationship of the audio program. A dialog loudness preference can be received, such as from a user, from a database, or from another source. A desired long-term gain or attenuation can be determined according to a difference between the received long-term dialog balance for the audio program and the received dialog balance preference. The long-term gain or attenuation can be applied to at least one of the dialog signal and the non-dialog signal of the audio program to render an audio program that is enhanced according to the loudness preference.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: April 2, 2019
    Assignee: DTS, Inc.
    Inventors: Jean-Marc Jot, Brandon Smith, Jeffrey K. Thompson, Zoran Fejzo
  • Patent number: 10243534
    Abstract: Systems and methods to provide an audio spectral correction can be implemented in a variety of applications. Such systems and methods can include an equalizer design that uses efficient filter sections tuned with a closed form algorithm to give an accurate and intuitive frequency response with low complexity and minimal processing overhead. Embodiments can enable efficient and accurate control of reverberation time vs. frequency in artificial reverberators. Embodiments can enable efficient realization of a cascade combination of multi-band equalization functions as a single multi-band equalizer function, in which such functions can be expressed as graphic equalization functions using the same set of center frequencies as the cascade combination of multi-band equalization functions. Additional apparatus, systems, and methods are disclosed.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: March 26, 2019
    Assignee: DTS, Inc.
    Inventors: Jean-Marc Jot, Richard J. Oliver
  • Patent number: 10231073
    Abstract: The methods and apparatus described herein optimally represent full 3D audio mixes (e.g., azimuth, elevation, and depth) as “sound scenes” in which the decoding process facilitates head tracking. Sound scene rendering can be modified for the listener's orientation (e.g., yaw, pitch, roll) and 3D position (e.g., x, y, z). This provides the ability to treat sound scene source positions as 3D positions instead of being restricted to positions relative to the listener. Sound scene rendering can be augmented by encoding depth to a source directly. This provides the ability to modify the transmission format and panning equations to support adding depth indicators during content production. Unlike typical methods that apply depth cues such as loudness and reverberation changes in the mix, this method would enable recovering the distance of a source in the mix so that it can be rendered for the final playback capabilities rather than those on the production side.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: March 12, 2019
    Assignee: DTS, Inc.
    Inventors: Edward Stein, Martin Walsh, Guangji Shi, David Corsello
  • Patent number: 10217451
    Abstract: Embodiments of systems and methods are described for reducing undesired leakage energy produced by a non-front-facing speaker in a multi-speaker system. For example, the multi-speaker system can include an array of forward-facing speakers, one or more upward-facing speakers, and/or one or more side-facing speakers. Filters coupled to any two of the speakers in the multi-speaker system can generate audio signals output by the coupled speakers to reduce, attenuate, or cancel a portion of an audio signal output by one or more non-front-facing speakers that acoustically propagates along a direct path from the respective non-front-facing speaker to a listening position in a listening area in front of the multi-speaker system.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: February 26, 2019
    Assignee: DTS, Inc.
    Inventors: Suketu Kamdar, Zesen Zhuang, Martin Walsh, Edward Stein, Michael M. Goodwin, Jean-Marc Jot
  • Patent number: 10199043
    Abstract: The present invention provides for methods and apparatuses for processing audio data. In one embodiment, there is provided a method for achieving bitstream scalability in a multi-channel audio encoder, said method comprising receiving audio input data; organizing said input data by a Code Excited Linear Predictor (CELP) processing module for further encoding by arranging said data according to significance of data, where more significant data is placed ahead of less significant data; and providing a scalable output bitstream; a higher bitrate bitstream is scaled to lower bitrate by discarding less significant data from frame ends. The organized CELP data comprises of a first part and a second part. The first part comprises a frame header, sub frame parameters and innovation vector quantization data from the first frame from all channels. The innovation vector quantization data from the first frames from all channels is arranged according to channel number.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: February 5, 2019
    Assignee: DTS, Inc.
    Inventors: Dmitry V. Shmunk, Dmitry Rusanov
  • Patent number: 10200806
    Abstract: The method and apparatus described herein make use of multiple sets of head related transfer functions (HRTFs) that have been synthesized or measured at various distances from a reference head, spanning from the near-field to the boundary of the far-field. Additional synthetic or measured transfer functions maybe used to extend to the interior of the head, i.e., for distances closer than near-field. In addition, the relative distance-related gains of each set of HRTFs are normalized to the far-field HRTF gains.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: February 5, 2019
    Assignee: DTS, Inc.
    Inventors: Edward Stein, Martin Walsh, Guangji Shi, David Corsello
  • Patent number: 10187739
    Abstract: A sound field coding system and method that provides flexible capture, distribution, and reproduction of immersive audio recordings encoded in a generic digital audio format compatible with standard two-channel or multi-channel reproduction systems. This end-to-end system and method mitigates any impractical need for standard multi-channel microphone array configurations in consumer mobile devices such as smart phones or cameras. The system and method capture and spatially encode two-channel or multi-channel immersive audio signals that are compatible with legacy playback systems from flexible multi-channel microphone array configurations.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: January 22, 2019
    Assignee: DTS, Inc.
    Inventors: Michael M. Goodwin, Jean-Marc Jot, Martin Walsh
  • Patent number: 10158905
    Abstract: Media is selected for video playback through a first device and audio playback through one or more separate devices connected through a wireless network. Different techniques for synchronizing the audio and video can be selected based on one or more factors to improve media playback.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: December 18, 2018
    Assignee: DTS, Inc.
    Inventors: Dannie Lau, Chunho Lee
  • Patent number: 10146500
    Abstract: A transform-based codec and method with energy smoothing for mitigating vector quantization errors (such as “birdies”) during the encoding process. Embodiments of the codec and method use an encoder to apply in combination an orthogonal transformation and a vector permutation to frequency transform coefficients. In some embodiments the transformation is performed first followed by the permutation and in other embodiments the order is reversed. The order used is reversed at the decoder. A smoothing parameter containing the level of energy smoothing to be applied is passed from the encoder to the decoder and used by both to compute a transform matrix and an inverse transform matrix. In some embodiments the transform matrix is a fraction Hadamard matrix that is invertible, energy preserving, controllable, and stable.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: December 4, 2018
    Assignee: DTS, Inc.
    Inventors: Elias Nemer, Jeffrey K. Thompson, Antonius Kalker
  • Patent number: 10075797
    Abstract: A constant-power pairwise panning upmixing system and method for upmixing from a two-channel stereo signal to a multi-channel surround sound (having more than two channels). Each output channel is some combination of the two input channels. Closed-form solutions are used to calculate dematrixing coefficients that are used to weight each input channel. The dematrixing coefficients are computed based on an inter-channel level difference and an inter-channel phase difference between the two input signals. The weighted input channels then are mixed uniquely for each output channel to generate a surround sound output from the stereo input signal. Each dematrixing coefficient has an in-phase component and an out-of-phase component. The phase coefficients for each component vary in time and are based on the phase difference between the input signals. The resultant surround sound output faithfully simulates the audio content as originally mixed.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: September 11, 2018
    Assignee: DTS, Inc.
    Inventor: Jeffrey Kenneth Thompson
  • Patent number: 10075789
    Abstract: A GPEQ filter and tuning methods for asymmetric transaural audio reproduction on mobile consumer devices. The GPEQ filter includes an asymmetric FIR filter bank configured to normalize the magnitude responses of at least two audio speakers to a target response above a low frequency cross-over of the audio speakers as reproduced at the listener position and a symmetric IIR filter bank component configured to high pass filter above the low frequency cross-over and equalize the magnitude responses of the at least two audio speakers. In some embodiments the FIR filter bank is configured to normalize the group delay of the audio channels and in some embodiments the IIR filter bank includes an asymmetric IIR filter bank component configured to correct any residual asymmetry in the magnitude responses of the at least two audio speakers. Phase preservation may be accomplished using phase-balanced or phase-compensated IIR filter sections.
    Type: Grant
    Filed: October 11, 2016
    Date of Patent: September 11, 2018
    Assignee: DTS, Inc.
    Inventors: Edward Stein, David Corsello, Guangji Shi
  • Patent number: 10070245
    Abstract: A method and apparatus may be used to perform personalized audio virtualization. The apparatus may include a speaker, a headphone (over-the-ear, on-ear, or in-ear), a microphone, a computer, a mobile device, a home theater receiver, a television, a Blu-ray (BD) player, a compact disc (CD) player, a digital media player, or the like. The apparatus may be configured to receive an audio signal, scale the audio signal, and perform a convolution and reverberation on the scaled audio signal to produce a convolved audio signal. The apparatus may be configured to filter the convolved audio signal and process the filtered audio signal for output.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: September 4, 2018
    Assignee: DTS, Inc.
    Inventors: Martin Walsh, Edward Stein, Michael C. Kelly, Prashant Velagaleti
  • Patent number: 10063207
    Abstract: A method and apparatus for processing object-based audio signals is provided. The apparatus receives a plurality of object-based audio signals. Each object-based audio signal of the object-based audio signals includes audio waveform data and object metadata associated with the audio waveform data. The object metadata includes at least one of a loudness parameter or a power parameter associated with the audio waveform data. The apparatus determines a loudness metric based on the received object-based audio signals and based on the at least one of the loudness parameter or the power parameter for each object-based audio signal of the received object-based audio signals. In one configuration, the apparatus renders the received object-based audio signals to a set of output signals based on the determined loudness metric. In another configuration, the apparatus transmits (e.g., broadcast, file delivery, or streaming) the received object-based audio signals based on the determined loudness metric.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: August 28, 2018
    Assignee: DTS, Inc.
    Inventors: Fadi Malak, Themis Katsianos, Jean-Marc Jot
  • Patent number: 10044333
    Abstract: A method and system is presented for coordinating the transmission of supplemental digital data to accompany broadcast data, and in particular, analog radio broadcasts, among a plurality of broadcasters. The supplemental digital data may provide information about the particular broadcast data being transmitted or may be supplemental to such data. The supplemental digital data to be presented is sorted based on particular algorithms which may take into account broadcaster-specified criteria such as target audience, time of day, type of broadcast data presented, and the like. The supplemental digital data may be audio data, visual data, or audio-visual data for presentation with the broadcast data. The supplemental digital data may further be advertisement data. The advertisement data may be sold by the broadcasters or the party coordinating the IBOC transmission of the supplemental digital data. The supplemental digital data may play simultaneously with muted broadcast data or at a user-specified time.
    Type: Grant
    Filed: April 12, 2013
    Date of Patent: August 7, 2018
    Assignee: DTS, Inc.
    Inventors: David Corts, Bryce Wells, Paul Signorelli, Lee Hunter, Terrance Snyder
  • Patent number: 10038967
    Abstract: Accurate modeling of acoustic reverberation can be essential to generating and providing a realistic virtual reality or augmented reality experience for a participant. In an example, a reverberation signal for playback using headphones can be provided. The reverberation signal can correspond to a virtual sound source signal originating at a specified location in a local listener environment. Providing the reverberation signal can include, among other things, using information about a reference impulse response from a reference environment and using characteristic information about reverberation decay in a local environment of the participant. Providing the reverberation signal can further include using information about a relationship between a volume of the reference environment and a volume of the local environment of the participant.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: July 31, 2018
    Assignee: DTS, Inc.
    Inventors: Jean-Marc Jot, Keun Sup Lee, Edward Stein
  • Patent number: 10027994
    Abstract: A method and apparatus for processing object-based audio signals for reproduction through a playback system is provided. The apparatus receives a plurality of object-based audio signals in at least one audio frame. In addition, the apparatus receives at least one audio object command associated with at least one object-based audio signal of the plurality of object-based audio signals. In addition, the apparatus processes the at least one object-based audio signal based on the received at least one audio object command. Further, the apparatus renders a set of object-based audio signals of the plurality of object-based audio signals to a set of output signals based on the at least one audio object command. The at least one audio frame may be received from one of a set top box, an OD player, or a television. The apparatus may be an AV receiver or a television.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: July 17, 2018
    Assignee: DTS, INC.
    Inventors: Phillip Lee Maness, Mark Rogers Johnson
  • Patent number: 10008217
    Abstract: A multi-rate audio processing system and method provides real-time measurement and processing of amplitude/phase changes in the transition band of the lowest frequency subband caused by the audio processing that can be used to apply amplitude/phase compensation to the higher subband(s). Tone signals may be injected into the transition band to provide strong tonal content for measurement and processing. The real-time measurement and compensation adapts to time-varying amplitude/phase changes regardless of the source of the change (e.g. non-linear time-varying linear or user control parameters) and provides universal applicability for any linear audio processing.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: June 26, 2018
    Assignee: DTS, INC.
    Inventors: Daekyoung Noh, Themis Katsianos