公开(公告)号：US10805723B2

公开(公告)日：2020-10-13

申请号：US16433933

申请日：2019-06-06

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Timothy Alan Port ,  Sebastian P. B. Holzapfel ,  Juan Felix Torres

IPC: H04R3/04 ,  G06F3/16 ,  H04R29/00 ,  H04B17/12 ,  G10L21/0232

Abstract: Systems and methods for automatic characterization of perceived transducer distortion are described. The system includes a controller configured to receive a distortion level; a signal generator configured to generate a test signal for a frequency band in response to the distortion level, the test signal including at least two simultaneous tones, the at least two simultaneous tones having different frequencies within the frequency band; an audio transducer configured to generate an audio signal based on the test signal; and a distortion tuner configured to receive the audio signal and to determine the distortion level of the system based on a detected amount of distortion in the audio signal.

公开(公告)号：US12302073B2

公开(公告)日：2025-05-13

申请号：US18000835

申请日：2021-06-21

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Joseph McKee ,  Timothy Alan Port ,  Paul Holmberg

IPC: H04R29/00

Abstract: Embodiments are disclosed for non-intrusive transducer health detection in an audio system. In an embodiment, a method performed by the audio system comprises outputting one or more encoded inaudible acoustic signals into an acoustic transmission medium using a first transducer. The one or more encoded inaudible acoustic signals are received from the acoustic transmission medium using a second transducer of the audio system. The received one or more encoded inaudible acoustic signals are used to identify failure or degradation of the first or second transducer.

公开(公告)号：US12243548B2

公开(公告)日：2025-03-04

申请号：US17781622

申请日：2020-12-08

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Benjamin Alexander Jancovich ,  Timothy Alan Port ,  Andrew P. Reilly ,  Richard J. Cartwright

IPC: G10L21/0232 ,  G06F3/16 ,  G10L15/22 ,  G10L25/51 ,  H03G3/32 ,  H03G9/02 ,  H04M9/08 ,  H04R1/08 ,  H04R1/40 ,  H04R3/00 ,  H04R3/02 ,  H04R3/04 ,  H04R3/12 ,  H04R29/00

Abstract: Some noise compensation methods involve receiving microphone signals corresponding to ambient noise from a noise source location in or near an audio environment, determining or estimating a listener position in the audio environment and estimating at least one critical distance, which is a distance from the noise source location at which directly propagated sound pressure is equal to diffuse field sound pressure. Some examples involve estimating whether the listener position is within the at least one critical distance and implementing a noise compensation method for the ambient noise based, at least in part, on an estimate of whether the listener position is within the critical distance.

公开(公告)号：US20230232174A1

公开(公告)日：2023-07-20

申请号：US18000835

申请日：2021-06-21

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Joseph McKee ,  Timothy Alan Port ,  Paul Holmberg

IPC: H04R29/00

CPC classification number: H04R29/001 ,  H04R29/004

Abstract: Embodiments are disclosed for non-intrusive transducer health detection in an audio system. In an embodiment, a method performed by the audio system comprises outputting one or more encoded inaudible acoustic signals into an acoustic transmission medium using a first transducer. The one or more encoded inaudible acoustic signals are received from the acoustic transmission medium using a second transducer of the audio system. The received one or more encoded inaudible acoustic signals are used to identify failure or degradation of the first or second transducer.

公开(公告)号：US11616482B2

公开(公告)日：2023-03-28

申请号：US17255350

申请日：2019-06-20

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Timothy Alan Port ,  Sean Alexander Brady

IPC: H03G9/02 ,  H03G3/30 ,  H03G9/00 ,  H04R3/04

Abstract: In some embodiments, a method for performing at least one of enhancement, decoding, or rendering of a multichannel audio signal in response to compression feedback or feedback from a smart amplifier. For example, the compression feedback may be indicative of amount of compression applied to each of multiple frequency bands, of the audio signal or an enhanced audio signal generated in response thereto. The enhancement (e.g., bass enhancement) may include dynamic routing of audio content of the input audio signal between channels of an enhanced audio signal generated in response thereto. The enhancement and compression may be performed on a per speaker class basis. Other aspects are systems (e.g., programmed processors) and devices (e.g., devices having physically-limited bass reproduction capabilities, such as, for example, a notebook or laptop computer, tablet, soundbar, mobile phone, or other device with small speakers) configured to perform any embodiment of the method.

公开(公告)号：US11489886B2

公开(公告)日：2022-11-01

申请号：US17334510

申请日：2021-05-28

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Timothy Alan Port

IPC: H04N7/15 ,  H04L65/1089 ,  G06F3/042 ,  G06F3/04886 ,  G06T3/00 ,  G06T5/00 ,  G06T5/50 ,  H04L65/403 ,  H04M3/56 ,  H04L65/75

Abstract: A method of processing of a sequence of video frames from a camera capturing a writing surface for subsequent transmission to at least one of a remote videoconferencing client and a remote videoconferencing server. The method comprises receiving the sequence of video frames from the camera; and selecting an image area of interest in the video frames, comprising selecting one of a sub-area of the video frames and an entire area of the video frames. The method also comprises, for each current video frame of the sequence of video frames, generating a pen stroke mask by applying adaptive thresholding to the image area of interest. The method also comprises generating an output video frame using the pen stroke mask. Corresponding systems and computer readable media are disclosed.

公开(公告)号：US11039244B2

公开(公告)日：2021-06-15

申请号：US16433636

申请日：2019-06-06

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Timothy Alan Port ,  Sebastian P. B. Holzapfel ,  Juan Felix Torres

IPC: H04R3/04 ,  G06F3/16 ,  H04R29/00 ,  H04B17/12 ,  G10L21/0232

Abstract: Systems and methods for manual characterization of perceived transducer distortion are described. The system includes a signal generator, a controller, a multi-band compressor, and an audio transducer. The signal generator is configured to generate a test signal for a frequency band. The test signal includes at least two simultaneous frequency-modulated tones, which may be combined together in an amplitude-modulated envelope. The at least two simultaneous frequency-modulated tones have different frequencies within the frequency band. The controller is configured to receive user input indicating a gain value. The multi-band compressor is coupled to the signal generator. The multi-band compressor is configured to adjust an amplitude of a component of the test signal based on the gain value. The audio transducer is coupled to the multi-band compressor. The audio transducer is configured to generate an audio signal based on the test signal.