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    Methods and apparatus for depth encoding and decoding
    2.
    发明授权
    Methods and apparatus for depth encoding and decoding 有权

    公开(公告)号：US11671596B2

    公开(公告)日：2023-06-06

    申请号：US17047251

    申请日：2019-04-09

    Applicant: InterDigital VC Holdings, Inc.

    Inventor： Julien Fleureau ,  Renaud Dore ,  Franck Thudor ,  Thierry Tapie

    IPC: H04N19/124 ,  H04N19/176 ,  H04N19/179 ,  H04N19/597

    CPC classification number: H04N19/124 ,  H04N19/176 ,  H04N19/179 ,  H04N19/597

    Abstract: Methods and device for encoding/decoding data representative of depth of a 3D scene. The depth data are quantized in a range of quantized depth values larger than a range of encoding values allowed by a determined encoding bit depth. For blocks of pixels comprising the depth data, a first set of candidate quantization parameters is determined. A second set of quantization parameters is determined as a subset of the union of the first sets. The second set comprising candidate quantization parameters common to a plurality of blocks. One or more quantization parameters of the second set being associated with each block of pixels of the picture. The second set of quantization parameters is encoded, and the quantized depth values are encoded according to the quantization parameters.

    Method, apparatus and stream for encoding/decoding volumetric video
    3.
    发明授权
    Method, apparatus and stream for encoding/decoding volumetric video 有权

    公开(公告)号：US11367247B2

    公开(公告)日：2022-06-21

    申请号：US16766355

    申请日：2018-11-06

    Applicant: InterDigital VC Holdings, Inc.

    Inventor： Franck Thudor ,  Bertrand Chupeau ,  Renaud Dore ,  Thierry Tapie ,  Julien Fleureau

    IPC: G06T15/08 ,  G06T7/73 ,  G06T17/10 ,  G06T15/04 ,  H04N19/597

    Abstract: Encoding/decoding data representative of a 3D representation of a scene according to a range of points of view can involve generating a depth map associated with a part of the 3D representation according to a parameter representative of a two-dimensional parameterization associated with the part and data associated with a point included in the part, wherein the two-dimensional parameterization can be responsive to geometric information associated with the point and to pose information associated with the range of points of view. A texture map associated with the part can be generated according to the parameter and data associated with the point. First information representative of point density of points in a part of the part can be obtained. The depth map, texture map, parameter, and first information can be included in respective syntax elements of a bitstream.

    Method and apparatus for depth encoding and decoding
    4.
    发明授权
    Method and apparatus for depth encoding and decoding 有权

    公开(公告)号：US12143633B2

    公开(公告)日：2024-11-12

    申请号：US17440151

    申请日：2020-03-17

    Applicant: InterDigital VC Holdings, Inc.

    Inventor： Julien Fleureau ,  Renaud Dore ,  Franck Thudor

    IPC: H04N19/597 ,  H04N19/124 ,  H04N19/162 ,  H04N19/184 ,  H04N19/70

    Abstract: Methods, device and data stream format are disclosed in the present document for the encoding, the formatting and the decoding of depth information representative of a 3D scene. Compression and decompression of quantized values by a video codec leads to a value error. This error on values is particularly sensitive for depth encoding. The present invention proposes to encode and decode depth with a quantization function that minimize an angle error when a value error on quantized depth creates a location delta between the projected point and the de-projected point. The inverse of such a quantization function has to be encoded in metadata associated with the 3D scene, for example as a LUT, to be retrieved at the decoding, as such functions are not tractable.

    Method, apparatus and stream for volumetric video format
    9.
    发明授权
    Method, apparatus and stream for volumetric video format 有权

    公开(公告)号：US11178383B2

    公开(公告)日：2021-11-16

    申请号：US17043504

    申请日：2019-03-27

    Applicant: InterDigital VC Holdings, Inc.

    Inventor： Julien Fleureau ,  Bertrand Chupeau ,  Thierry Tapie ,  Franck Thudor

    IPC: H04N13/275 ,  H04N13/117 ,  H04N13/194 ,  H04N13/161 ,  H04N13/282

    Abstract: Methods and device for encoding/decoding data representative of a 3D scene. First data representative of texture of the 3D scene visible from a first viewpoint is encoded into first tracks. The first data is arranged in first tiles of a first frame. Second data representative of depth associated with points of the 3D scene is encoded into second tracks. The second data is arranged in second tiles of a second frame, the total number of second tiles being greater than the total number of first tiles. Instructions to extract at least a part of the first data and second data from at least a part of the at least a first track and at least a second track are further encoded into one or more third tracks.

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