中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

68 records (took 0.026 seconds)

    HARMONICITY ESTIMATION, AUDIO CLASSIFICATION, PITCH DETERMINATION AND NOISE ESTIMATION
    11.
    发明申请
    HARMONICITY ESTIMATION, AUDIO CLASSIFICATION, PITCH DETERMINATION AND NOISE ESTIMATION 有权
    谐波估计，音频分类，判定和噪声估计

    公开(公告)号：US20150081283A1

    公开(公告)日：2015-03-19

    申请号：US14384356

    申请日：2013-03-21

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Xuejing Sun ,  Zhiwei Shuang ,  Shen Huang

    IPC: G10L25/78

    CPC classification number: G10L25/78 ,  G10L25/18 ,  G10L25/81 ,  G10L25/84

    Abstract: Embodiments are described for harmonicity estimation, audio classification, pitch determination and noise estimation. Measuring harmonicity of an audio signal includes calculation a log amplitude spectrum of audio signal. A first spectrum is derived by calculating each component of the first spectrum as a sum of components of the log amplitude spectrum on frequencies. In linear frequency scale, the frequencies are odd multiples of the component's frequency of the first spectrum. A second spectrum is derived by calculating each component of the second spectrum as a sum of components of the log amplitude spectrum on frequencies. In linear frequency scale, the frequencies are even multiples of the component's frequency of the second spectrum. A difference spectrum is derived subtracting the first spectrum from the second spectrum. A measure of harmonicity is generated as a monotonically increasing function of the maximum component of the difference spectrum within predetermined frequency range.

    Abstract translation: 描述了用于谐波估计，音频分类，音调确定和噪声估计的实施例。 测量音频信号的谐波包括计算音频信号的对数幅度谱。 通过将第一频谱的每个分量计算为频率上的对数幅度谱的分量的和来导出第一频谱。 在线性频率标度中，频率是第一个频谱的分量频率的奇数倍。 通过将第二频谱的每个分量计算为频率上的对数幅度谱的分量的和来导出第二频谱。 在线性频率标度中，频率是第二个频谱的分量频率的偶数倍。 导出从第二个频谱减去第一个频谱的差分谱。 产生谐波度的度量作为预定频率范围内的差分频谱的最大分量的单调递增函数。

    In-service quality monitoring system with intelligent retransmission and interpolation
    14.
    发明授权
    In-service quality monitoring system with intelligent retransmission and interpolation 有权

    公开(公告)号：US11223669B2

    公开(公告)日：2022-01-11

    申请号：US16927785

    申请日：2020-07-13

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Shen Huang ,  Doh-Suk Kim ,  Xuejing Sun

    IPC: H04L29/06 ,  H04M7/00 ,  H04L29/08 ,  H04L12/26

    Abstract: A service request for communication services for communication clients is received. In response, a communication service network is set up to support the communication services. Routing metadata is generated for each of the communication clients. The routing metadata is to be used by each of the communication clients for sharing service quality information with a respective peer communication client over a light-weight peer-to-peer (P2P) network. The routing metadata is downloaded to each of the communication clients. A communication client may exchange service signaling packets or service data packets over the communication service network. When the communication client determines that there is a problematic region in a bitstream received from the communication server, the communication client can request a peer communication client for a service quality information portion related to the problematic region.

    Handling nuisance in teleconference system
    17.
    发明授权
    Handling nuisance in teleconference system 有权

    公开(公告)号：US10182207B2

    公开(公告)日：2019-01-15

    申请号：US15544114

    申请日：2016-02-16

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Taoran Lu ,  Hariharan Ganapathy-Kathirvelu ,  Peng Yin ,  Glenn N. Dickins ,  Xuejing Sun

    IPC: H04N7/15 ,  H04M3/56 ,  H04N7/14 ,  H04L29/06

    Abstract: The disclosure relates to handling nuisance in teleconference system. An endpoint device (400) for use in a teleconference includes an acquiring unit (401), a judging unit (402), a controller (403) and a processing unit (404). The acquiring unit acquires a media stream for presentation in the teleconference, and receives information from another device. The information includes a first estimation on whether the media stream is a nuisance to the teleconference. As the nuisance to a teleconference, audio or video signals are perceived by users as actually not relevant to the conference session or causing unpleasant feeling or confusion. The judging unit decides whether the media stream is the nuisance at least based on the information. The controller controls the processing of the media stream to degrade or suppress the presentation of the media stream in case that the media stream is decided as the nuisance. The processing unit processes the media stream under the control of the controller.

    Jitter buffer level estimation
    18.
    发明授权
    Jitter buffer level estimation 有权

    公开(公告)号：US10103999B2

    公开(公告)日：2018-10-16

    申请号：US15125564

    申请日：2015-04-08

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： JiaQuan Huo ,  Xuejing Sun ,  Kai Li

    IPC: H04L12/841 ,  H04J3/06 ,  H04L12/26 ,  H04L12/835

    Abstract: Some implementations involve controlling a jitter buffer size during a teleconference according to a jitter buffer size estimation algorithm based, at least in part, on a cumulative distribution function (CDF). The CDF may be based, at least in part, on a network jitter parameter. The CDF may be initialized according to a parametric model. At least one parameter of the parametric model may be based, at least in part, on legacy network jitter information.

Patent Agency Ranking