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    Chroma quantization in video coding
    11.
    发明专利
    Chroma quantization in video coding 未知

    公开(公告)号：AU2016200770B2

    公开(公告)日：2018-03-01

    申请号：AU2016200770

    申请日：2016-02-05

    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
    12.
    发明专利
    Sample adaptive offset control 未知

    公开(公告)号：AU2014281169B2

    公开(公告)日：2017-01-19

    申请号：AU2014281169

    申请日：2014-05-01

    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.

    Chroma quantization in video coding
    13.
    发明专利
    Chroma quantization in video coding 未知

    公开(公告)号：AU2014216004B2

    公开(公告)日：2015-11-05

    申请号：AU2014216004

    申请日：2014-08-22

    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
    14.
    发明申请
    CHROMA QUANTIZATION IN VIDEO CODING 审中-公开
    视频编码中的色度量化

    公开(公告)号：WO2015035092A2

    公开(公告)日：2015-03-12

    申请号：PCT/US2014054152

    申请日：2014-09-04

    Applicant: APPLE INC

    Inventor： TOURAPIS ALEXANDROS ,  COTE GUY

    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: 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.

    Abstract translation: 提供了一种用信号通知特定于量化组的附加色度QP偏移值的方法，其中每个量化组明确地指定其自己的一组色度QP偏移值。 可选地，在图片的头部区域中指定可能的色度QP偏移值集合的表格，并且每个量化群组使用索引来从表格中选择用于确定其自己的一组色度QP偏移值的项目。 然后使用量化组特定色度QP偏移值来确定量化组内的块的色度QP值，以及已经为视频编码分层结构的较高级别指定的色度QP偏移值。

    CUANTIFICACION DE CROMINANCIA EN CODIFICACION DE VIDEO.
    15.
    发明专利
    CUANTIFICACION DE CROMINANCIA EN CODIFICACION DE VIDEO. 未知

    公开(公告)号：MX374210B

    公开(公告)日：2025-03-05

    申请号：MX2018009440

    申请日：2016-02-09

    Applicant: APPLE INC

    Inventor： TOURAPIS ALEXANDROS ,  COTE GUY

    IPC: 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: Se proporciona un método para señalizar valores de desplazamientos adicionales de QP de crominancia que son específicos para grupos de cuantificación, en donde cada grupo de cuantificación explícitamente especifica su propio conjunto de valores de desplazamientos de QP de crominancia. De manera alternativa, una tabla de posibles conjuntos de valores de desplazamientos de QP de crominancia se especifica en el área de encabezamiento del gráfico, y cada grupo de cuantificación utiliza un índice para seleccionar una entrada de la tabla para determinar su propio conjunto de valores de desplazamientos de QP de crominancia. Posteriormente, los valores de desplazamientos de QP de crominancia específicos de grupo de cuantificación se utilizan para determinar los valores de QP de crominancia para bloques en el grupo de cuantificación además de los valores de desplazamientos de QP de crominancia ya especificados para niveles superiores de la jerarquía de codificación de video.

    Sample adaptive offset control
    20.
    发明专利
    Sample adaptive offset control 未知

    公开(公告)号：AU2021204661A1

    公开(公告)日：2021-07-29

    申请号：AU2021204661

    申请日：2021-07-02

    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.

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