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    HIGH PRECISION UP-SAMPLING IN SCALABLE CODING OF HIGH BIT-DEPTH VIDEO
    51.
    发明申请
    HIGH PRECISION UP-SAMPLING IN SCALABLE CODING OF HIGH BIT-DEPTH VIDEO 有权

    公开(公告)号：US20220174297A1

    公开(公告)日：2022-06-02

    申请号：US17673646

    申请日：2022-02-16

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Peng YIN ,  Taoran LU ,  Tao CHEN

    IPC: H04N19/33 ,  H04N19/105 ,  H04N19/59 ,  H04N19/80

    Abstract: The precision of up-sampling operations in a layered coding system is preserved when operating on video data with high bit-depth. In response to bit-depth requirements of the video coding or decoding system, scaling and rounding parameters are determined for a separable up-scaling filter. Input data are first filtered across a first spatial direction using a first rounding parameter to generate first up-sampled data. First intermediate data are generated by scaling the first up-sampled data using a first shift parameter. The intermediate data are then filtered across a second spatial direction using a second rounding parameter to generate second up-sampled data. Second intermediate data are generated by scaling the second up-sampled data using a second shift parameter. Final up-sampled data may be generated by clipping the second intermediate data.

    SIGNAL RESHAPING FOR HIGH DYNAMIC RANGE SIGNALS
    53.
    发明申请
    SIGNAL RESHAPING FOR HIGH DYNAMIC RANGE SIGNALS 有权

    公开(公告)号：US20210243477A1

    公开(公告)日：2021-08-05

    申请号：US17234815

    申请日：2021-04-20

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Robin ATKINS ,  Peng YIN ,  Taoran LU ,  Jaclyn Anne PYTLARZ

    IPC: H04N19/87 ,  H04N19/46 ,  H04N19/98 ,  H04N19/85 ,  H04N1/60

    Abstract: In a method to improve backwards compatibility when decoding high-dynamic range images coded in a wide color gamut (WCG) space which may not be compatible with legacy color spaces, hue and/or saturation values of images in an image database are computed for both a legacy color space (say, YCbCr-gamma) and a preferred WCG color space (say, IPT-PQ). Based on a cost function, a reshaped color space is computed so that the distance between the hue values in the legacy color space and rotated hue values in the preferred color space is minimized HDR images are coded in the reshaped color space. Legacy devices can still decode standard dynamic range images assuming they are coded in the legacy color space, while updated devices can use color reshaping information to decode HDR images in the preferred color space at full dynamic range.

    TILING IN VIDEO ENCODING AND DECODING
    55.
    发明申请
    TILING IN VIDEO ENCODING AND DECODING 审中-公开

    公开(公告)号：US20190379897A1

    公开(公告)日：2019-12-12

    申请号：US16551156

    申请日：2019-08-26

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Purvin Bibhas PANDIT ,  Peng YIN ,  Dong TIAN

    IPC: H04N19/46 ,  H04N13/111 ,  H04N19/597 ,  H04N19/61 ,  H04N19/70 ,  H04N13/194 ,  H04N13/161 ,  H04N19/172 ,  H04N19/182

    Abstract: Implementations are provided that relate, for example, to view tiling in video encoding and decoding. A particular method includes accessing a video picture that includes multiple pictures combined into a single picture (826), accessing information indicating how the multiple pictures in the accessed video picture are combined (806, 808, 822), decoding the video picture to provide a decoded representation of at least one of the multiple pictures (824, 826), and providing the accessed information and the decoded video picture as output (824, 826). Some other implementations format or process the information that indicates how multiple pictures included in a single video picture are combined into the single video picture, and format or process an encoded representation of the combined multiple pictures.

    CHROMA RESHAPING OF HDR VIDEO SIGNALS
    57.
    发明申请
    CHROMA RESHAPING OF HDR VIDEO SIGNALS 审中-公开

    公开(公告)号：US20190124367A1

    公开(公告)日：2019-04-25

    申请号：US16091078

    申请日：2017-05-09

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Taoran LU ,  Fangjun PU ,  Peng YIN ,  Tao CHEN

    IPC: H04N19/98 ,  H04N19/186 ,  H04N19/85

    CPC classification number: H04N19/98 ,  H04N19/117 ,  H04N19/186 ,  H04N19/46 ,  H04N19/85

    Abstract: Methods for the chroma reshaping of high-dynamic range (HDR) signals are presented. For each input pixel, a first scaler is generated based on the pixel luminance and a luma-based chroma reshaping (LCR) function. A second scaler is generated based on a saturation-based chroma reshaping (SCR) function and the saturation value of the pixel. A cascaded scaler is generated by multiplying the first scaler with the second scaler. Reshaped chroma values are generated by multiplying the input chroma values with the cascaded scaler. The characteristics of preferred LCR and SCR functions are discussed. Inverse decoding methods based on chroma-reshaping metadata that define the LCR and SCR functions are also described.

    HANDLING NUISANCE IN TELECONFERENCE SYSTEM
    58.
    发明申请
    HANDLING NUISANCE IN TELECONFERENCE SYSTEM 审中-公开

    公开(公告)号：US20170353696A1

    公开(公告)日：2017-12-07

    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 ,  H04L29/06 ,  H04M3/56 ,  H04N7/14

    CPC classification number: H04N7/152 ,  H04L65/403 ,  H04L65/80 ,  H04M3/2227 ,  H04M3/56 ,  H04M2203/5036 ,  H04N7/147 ,  H04N7/15

    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.

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