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    DOLBY ATMOS MASTER COMPRESSOR/LIMITER
    41.
    发明公开
    DOLBY ATMOS MASTER COMPRESSOR/LIMITER 审中-公开

    公开(公告)号：US20240163529A1

    公开(公告)日：2024-05-16

    申请号：US18281535

    申请日：2022-03-24

    申请人： DOLBY LABORATORIES LICENSING CORPORATION

    发明人： Dirk Jeroen BREEBAART ,  Brett G. Crockett ,  Ryan Michael Friedrich ,  Jordan Robert Glasgow ,  Derek Christian Jones ,  Eric Whelan Yeargan

    IPC分类号： H04N21/845 ,  H04N21/854

    CPC分类号： H04N21/8456 ,  H04N21/854

    摘要： The present disclosure relates to a method and audio processing system for performing dynamic range adjustment of spatial audio objects. The method comprises obtaining (step S1) a plurality of spatial audio objects (10), obtaining (step S2) at least one rendered audio presentation of the spatial audio objects (10) and determining (step S3) signal level data associated with each presentation audio channel in said set of presentation audio channels. The method further comprises obtaining (step S31) a threshold value and, for each time segment, selecting (step S4) a selected presentation audio channel which is associated with a highest or a lowest signal level, determining (step S5) a gain based on the threshold value and the representation of the signal level of the selected audio channel, and applying (step S6) the gain of each time segment to corresponding time segments of the spatial audio objects.

    METHODS AND SYSTEMS FOR DESIGNING AND APPLYING NUMERICALLY OPTIMIZED BINAURAL ROOM IMPULSE RESPONSES
    42.
    发明公开
    METHODS AND SYSTEMS FOR DESIGNING AND APPLYING NUMERICALLY OPTIMIZED BINAURAL ROOM IMPULSE RESPONSES 审中-公开

    公开(公告)号：US20230262409A1

    公开(公告)日：2023-08-17

    申请号：US18106261

    申请日：2023-02-06

    申请人： Dolby Laboratories Licensing Corporation

    发明人： Grant A. DAVIDSON ,  Kuan-Chieh YEN ,  Dirk Jeroen BREEBAART

    IPC分类号： H04S7/00

    CPC分类号： H04S7/304 ,  H04S7/306 ,  H04S2420/01 ,  H04S2400/03 ,  H04S2420/07

    摘要： Methods and systems for designing binaural room impulse responses (BRIRs) for use in headphone virtualizers, and methods and systems for generating a binaural signal in response to a set of channels of a multi-channel audio signal, including by applying a BRIR to each channel of the set, thereby generating filtered signals, and combining the filtered signals to generate the binaural signal, where each BRIR has been designed in accordance with an embodiment of the design method. Other aspects are audio processing units configured to perform any embodiment of the inventive method. In accordance with some embodiments, BRIR design is formulated as a numerical optimization problem based on a simulation model (which generates candidate BRIRs) and at least one objective function (which evaluates each candidate BRIR), and includes identification of a best one of the candidate BRIRs as indicated by performance metrics determined for the candidate BRIRs by each objective function.

    AUDIO DECODER AND DECODING METHOD
    43.
    发明申请
    AUDIO DECODER AND DECODING METHOD 有权

    公开(公告)号：US20220399027A1

    公开(公告)日：2022-12-15

    申请号：US17887429

    申请日：2022-08-13

    申请人： Dolby Laboratories Licensing Corporation

    发明人： Dirk Jeroen BREEBAART ,  David Matthew COOPER ,  Leif Jonas SAMUELSSON

    IPC分类号： G10L19/02 ,  H04S7/00 ,  G10L19/008

    摘要： A method for representing a second presentation of audio channels or objects as a data stream, the method comprising the steps of: (a) providing a set of base signals, the base signals representing a first presentation of the audio channels or objects; (b) providing a set of transformation parameters, the transformation parameters intended to transform the first presentation into the second presentation; the transformation parameters further being specified for at least two frequency bands and including a set of multi-tap convolution matrix parameters for at least one of the frequency bands.

    Generating Binaural Audio in Response to Multi-Channel Audio Using at Least One Feedback Delay Network
    45.
    发明申请
    Generating Binaural Audio in Response to Multi-Channel Audio Using at Least One Feedback Delay Network 审中-公开

    公开(公告)号：US20190373397A1

    公开(公告)日：2019-12-05

    申请号：US16541079

    申请日：2019-08-14

    申请人： Dolby Laboratories Licensing Corporation

    发明人： Kuan-Chieh YEN ,  Dirk Jeroen BREEBAART ,  Grant A. DAVIDSON ,  Rhonda WILSON ,  David M. Cooper ,  Zhiwei SHUANG

    IPC分类号： H04S7/00 ,  G10L19/008

    摘要： In some embodiments, virtualization methods for generating a binaural signal in response to channels of a multi-channel audio signal, which apply a binaural room impulse response (BRIR) to each channel including by using at least one feedback delay network (FDN) to apply a common late reverberation to a downmix of the channels. In some embodiments, input signal channels are processed in a first processing path to apply to each channel a direct response and early reflection portion of a single-channel BRIR for the channel, and the downmix of the channels is processed in a second processing path including at least one FDN which applies the common late reverberation. Typically, the common late reverberation emulates collective macro attributes of late reverberation portions of at least some of the single-channel BRIRs. Other aspects are headphone virtualizers configured to perform any embodiment of the method.

    Acoustic Environment Simulation
    46.
    发明申请
    Acoustic Environment Simulation 审中-公开

    公开(公告)号：US20190035410A1

    公开(公告)日：2019-01-31

    申请号：US16073132

    申请日：2017-01-23

    申请人： Dolby Laboratories Licensing Corporation

    发明人： Dirk Jeroen BREEBAART

    IPC分类号： G10L19/008 ,  G10L19/02

    摘要： Encoding/decoding an audio signal having one or more audio components, wherein each audio component is associated with a spatial location. A first audio signal presentation (z) of the audio components, a first set of transform parameters (w(f)), and signal level data (β2) are encoded and transmitted to the decoder. The decoder uses the first set of transform parameters (w(f)) to form a reconstructed simulation input signal intended for an acoustic environment simulation, and applies a signal level modification (α) to the reconstructed simulation input signal. The signal level modification is based on the signal level data (β2) and data (p2) related to the acoustic environment simulation. The attenuated reconstructed simulation input signal is then processed in an acoustic environment simulator. With this process, the decoder does not need to determine the signal level of the simulation input signal, thereby reducing processing load.

    SELECTIVE WATERMARKING OF CHANNELS OF MULTICHANNEL AUDIO
    47.
    发明申请
    SELECTIVE WATERMARKING OF CHANNELS OF MULTICHANNEL AUDIO 有权
    多通道音频通道的选择性水印

    公开(公告)号：US20160210972A1

    公开(公告)日：2016-07-21

    申请号：US14916029

    申请日：2014-09-09

    申请人： DOLBY LABORATORIES LICENSING CORPORATION

    发明人： Dossym NURMUKHANOV ,  Sripal S. MEHTA ,  Dirk Jeroen BREEBAART

    IPC分类号： G10L19/018 ,  G10L19/008

    CPC分类号： G10L19/018 ,  G10L19/008

    摘要： A method for selecting a subset of channels of (e.g., determined from) at least a segment of a multichannel audio program for watermarking and watermarking the selected subset of channels, and a system or device configured to implement any embodiment of the method, or including a buffer which stores at least one frame or other segment of a multichannel audio program generated by any embodiment of the method or steps thereof. Some embodiments generate watermarking metadata during program creation including by analyzing audio content to be included in segments of a multichannel program, determining at least one watermark suitability value for each channel of each of the segments, and including the watermark suitability values (or watermarking data determined therefrom) as metadata in the program. Some embodiments are implemented by a playback system which determines the selected subset of channels to be watermarked.

    摘要翻译： 一种用于选择多通道音频节目的至少一个段的信道子集的子集的方法，用于对选定的信道子集进行水印和水印，以及被配置为实现该方法的任何实施例的系统或设备，或包括 存储由该方法或其任何实施方式生成的多声道音频节目的至少一个帧或其他片段的缓冲器。 一些实施例在程序创建期间产生水印元数据，包括通过分析要包括在多通道程序的段中的音频内容，为每个段的每个通道确定至少一个水印适用性值，并且包括水印适用性值（或确定的水印数据 作为程序中的元数据。 一些实施例由确定要被加水印的所选择的信道子集的重放系统来实现。