中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

59 records (took 0.026 seconds)

    動画符号化における彩度量子化
    1.
    发明专利
    動画符号化における彩度量子化 有权
    视频编码中的色谱定量

    公开(公告)号：JP2015053680A

    公开(公告)日：2015-03-19

    申请号：JP2014172938

    申请日：2014-08-27

    Applicant: アップル インコーポレイテッド ,  Apple Inc ,  アップル インコーポレイテッド

    Inventor： TOURAPIS ALEXANDROS ,  GUY COTE

    IPC: H04N19/124 ,  H04N19/136 ,  H04N19/174 ,  H04N19/463 ,  H04N19/70

    CPC classification number: H04N19/124 ,  H04N19/126 ,  H04N19/13 ,  H04N19/136 ,  H04N19/15 ,  H04N19/157 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/186 ,  H04N19/30 ,  H04N19/51 ,  H04N19/61 ,  H04N19/70 ,  H04N19/86 ,  H04N19/96

    Abstract: 【課題】量子化グループ固有の追加の彩度QPオフセット値をシグナリングする方法を提供する。【解決手段】個々の量子化グループが、それ自体の彩度QPオフセット値の集合を明示的に指定する。あるいは、彩度QPオフセット値の見込まれる集合のテーブルが、ピクチャのヘッダエリア内に指定され、個々の量子化グループが、指標を用いてテーブルからエントリを選択して、それ自体の彩度QPオフセット値の集合を判定する。次いで、量子化グループ固有の彩度QPオフセット値を用いて、動画符号化階層の高位レベルについてすでに指定されている彩度QPオフセット値に加えて、量子化グループ内のブロックについて彩度QP値が判定される。【選択図】図1

    Abstract translation: 要解决的问题：提供一种发信号通知量化组特有的附加色度QP偏移值的方法。解决方案：每个量化组明确指定其自己的色度QP偏移值集合。 或者，在图像的标题区域中指定可能的色度QP偏移值集合的表，并且每个量化组使用索引来从表中选择用于确定其自己的色度QP偏移值集合的条目。 然后，除了已经为视频编码层级的较高级别指定的色度QP偏移值之外，量化组特定色度QP偏移值用于确定量化组内的块的色度QP值。

    Chroma quantization in video coding
    2.
    发明专利
    Chroma quantization in video coding 未知

    公开(公告)号：AU2024200364B2

    公开(公告)日：2025-01-30

    申请号：AU2024200364

    申请日：2024-01-19

    Applicant: APPLE INC

    Inventor： TOURAPIS ALEXANDROS ,  COTE GUY

    IPC: H04N19/124

    Abstract: A method of signaling additional chroma QP offset values that are specific to quantization groups is provided, in which each quantization group explicitly specifies its own set of chroma QP offset values. Alternatively, a table of possible sets of chroma QP offset values is specified in the header area of the picture, and each quantization group uses an index to select an entry from the table for determining its own set of chroma QP offset values. The quantization group specific chroma QP offset values are then used to determine the chroma QP values for blocks within the quantization group in addition to chroma QP offset values already specified for higher levels of the video coding hierarchy.

    Chroma quantization in video coding
    6.
    发明专利
    Chroma quantization in video coding 未知

    公开(公告)号：AU2021245204B2

    公开(公告)日：2023-02-02

    申请号：AU2021245204

    申请日：2021-10-08

    Applicant: APPLE INC

    Inventor： TOURAPIS ALEXANDROS ,  COTE GUY

    IPC: H04N19/124

    Abstract: A method of signaling additional chroma QP offset values that are specific to quantization groups is provided, in which each quantization group explicitly specifies its own set of chroma QP offset values. Alternatively, a table of possible sets of chroma QP offset values is specified in the header area of the picture, and each quantization group uses an index to select an entry from the table for determining its own set of chroma QP offset values. The quantization group specific chroma QP offset values are then used to determine the chroma QP values for blocks within the quantization group in addition to chroma QP offset values already specified for higher levels of the video coding hierarchy.

    Sample adaptive offset control
    7.
    发明专利
    Sample adaptive offset control 未知

    公开(公告)号：AU2020201584B2

    公开(公告)日：2021-04-08

    申请号：AU2020201584

    申请日：2020-03-04

    Applicant: APPLE INC

    Inventor： TOURAPIS ALEXANDROS

    IPC: H04N19/186 ,  H04N19/44 ,  H04N19/463 ,  H04N19/70 ,  H04N19/82 ,  H04N19/86

    Abstract: Offset values, such as Sample Adaptive Offset (SAO) values in video coding standards such as the High Efficiency Video Coding standard (HEVC), may be improved by performing calculations and operations that improve the preciseness of these values without materially affecting the signal overhead needed to transmit the more precise values. Such calculations and operations may include applying a quantization factor to a video sample and at least some of its neighbors, comparing the quantized values, and classifying the video sample as a minimum, maximum, or one of various types of edges based on the comparison. Other sample range, offset mode, and/or offset precision parameters may be calculated and transmitted with metadata to improve the precision of offset values.

    Adaptive color space transform coding
    8.
    发明专利
    Adaptive color space transform coding 未知

    公开(公告)号：AU2020201212B2

    公开(公告)日：2020-12-03

    申请号：AU2020201212

    申请日：2020-02-20

    Applicant: APPLE INC

    Inventor： TOURAPIS ALEXANDROS

    IPC: H04N19/122 ,  H04N19/186 ,  H04N19/196 ,  H04N19/46

    Abstract: An apparatus for decoding video data comprising: a means for decoding encoded video data to determine transformed residual sample data and to determine color transform parameters for a current image area, wherein the color transform parameters specify inverse color transform coefficients with a predefined precision; a means for determining a selected inverse color transform for the current image area from the color transform parameters; a means for performing the selected inverse color transform on the transformed residual sample data to produce inverse transformed residual sample data; and a means for combining the inverse transformed residual sample data with motion predicted image data to generate restored image data for the current image area of an output video.

    Adaptive color space transform coding
    9.
    发明专利
    Adaptive color space transform coding 未知

    公开(公告)号：AU2020201212A1

    公开(公告)日：2020-03-12

    申请号：AU2020201212

    申请日：2020-02-20

    Applicant: APPLE INC

    Inventor： TOURAPIS ALEXANDROS

    IPC: H04N19/122 ,  H04N19/186 ,  H04N19/196 ,  H04N19/46

    Abstract: An apparatus for decoding video data comprising: a means for decoding encoded video data to determine transformed residual sample data and to determine color transform parameters for a current image area, wherein the color transform parameters specify inverse color transform coefficients with a predefined precision; a means for determining a selected inverse color transform for the current image area from the color transform parameters; a means for performing the selected inverse color transform on the transformed residual sample data to produce inverse transformed residual sample data; and a means for combining the inverse transformed residual sample data with motion predicted image data to generate restored image data for the current image area of an output video.

    Sample adaptive offset control
    10.
    发明专利
    Sample adaptive offset control 未知

    公开(公告)号：AU2018204551A1

    公开(公告)日：2018-07-12

    申请号：AU2018204551

    申请日：2018-06-22

    Applicant: APPLE INC

    Inventor： TOURAPIS ALEXANDROS

    IPC: H04N19/186 ,  H04N19/44 ,  H04N19/463 ,  H04N19/70 ,  H04N19/82 ,  H04N19/86

    Abstract: Offset values, such as Sample Adaptive Offset (SAO) values in video coding standards such as the High Efficiency Video Coding standard (HEVC), may be improved by performing calculations and operations that improve the preciseness of these values without materially affecting the signal overhead needed to transmit the more precise values. Such calculations and operations may include applying a quantization factor to a video sample and at least some of its neighbors, comparing the quantized values, and classifying the video sample as a minimum, maximum, or one of various types of edges based on the comparison. Other sample range, offset mode, and/or offset precision parameters may be calculated and transmitted with metadata to improve the precision of offset values.

Patent Agency Ranking