公开(公告)号：AU2020201214A1

公开(公告)日：2020-03-05

申请号：AU2020201214

申请日：2020-02-20

Applicant: APPLE INC

Inventor： TOURAPIS ALEXANDROS

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

Abstract: A system for video encoding comprising: an integrator that combines source image data with predicted image data to generate residual image data for a transform unit (TU); a selectable residual transformer that performs a selected color transform on the residual image data to produce transformed residual image data; an encoder that encodes the transformed residual image data into an encoded bitstream including an indication of the selected color transform in a TU syntax element within the encoded bitstream.

公开(公告)号：AU2018203223B2

公开(公告)日：2020-01-16

申请号：AU2018203223

申请日：2018-05-09

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.

公开(公告)号：AU2017265177B2

公开(公告)日：2019-11-21

申请号：AU2017265177

申请日：2017-11-27

Applicant: APPLE INC

Inventor： TOURAPIS ALEXANDROS

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

Abstract: An encoder system may include an analyzer that analyzes a current image area in an input video to select a transform. A selectable residue transformer, controlled by the analyzer, may perform the selectable transform on a residue image generated from the current image area and a predicted current image area, to generate a transformed residue image. An encoder may encode the transformed residue image to generate output data. The analyzer controls the encoder to encode information to identify the selectable transform and to indicate that the selectable transform for the current image area is different from a transform of a previous image area of the input video. A decoder system may include components appropriate for decoding the output data from the encoder system.

公开(公告)号：AU2019253875A1

公开(公告)日：2019-11-14

申请号：AU2019253875

申请日：2019-10-24

Applicant: APPLE INC

Inventor： TOURAPIS ALEXANDROS

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

Abstract: A method for video encoding comprising: generating residual image data for a current image area by integrating a predicted image data with source image data, wherein the current image area is a transform unit (TU); performing a selected color transform on the residual image data to produce transformed residual image data; encoding the transformed residual image data into an encoded bitstream including an indication of the selected color transform in a TU syntax element within the encoded bitstream.

公开(公告)号：RU2693310C2

公开(公告)日：2019-07-02

申请号：RU2018115728

申请日：2014-09-04

Applicant: APPLE INC

Inventor： TOURAPIS ALEXANDROS ,  COTE GUY

IPC: H04N19/124 ,  H04N19/102 ,  H04N19/134 ,  H04N19/186

Abstract: Изобретениеотноситсяк вычислительнойтехнике. Техническийрезультат– расширениеарсеналатехническихсредствквантованияцветности. Способдекодированиявидеоизображениясодержит: приемв битовомпотокекодированноговидеоизображения, множествазначенийсдвигапараметраквантования (QP) цветностии множествагруппквантования, причемкаждаягруппаквантованиясодержитнаборэлементовкодирования; идекодированиекодированноговидеоизображенияпутемвычислениямножества QP цветностидлявидеоизображенияи использованиявычисленных QP цветностидлядекодированиявидеоизображения, причемупомянутоевычислениевключаетв себявычислениезначения QP цветностидляэлементовкодированиякаждойизмножествагруппквантованияпосредством: использованияиндекса, связанногос группойквантования, длявыборазначениясдвига QP цветностиизмножествазначенийсдвига QP цветностии вычислениязначения QP цветностидлянабораэлементовкодированиягруппыквантованиянаосновевыбранногозначениясдвига QP цветностии значения QP яркости, связанногос элементомкодирования. 19 з.п. ф-лы, 22 ил.

公开(公告)号：AU2017202576B2

公开(公告)日：2018-03-22

申请号：AU2017202576

申请日：2017-04-19

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.

公开(公告)号：AU2017202576A1

公开(公告)日：2017-05-11

申请号：AU2017202576

申请日：2017-04-19

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.

公开(公告)号：MX2016001780A

公开(公告)日：2016-05-18

申请号：MX2016001780

申请日：2014-09-04

Applicant: APPLE INC

Inventor： TOURAPIS ALEXANDROS ,  COTE GUY

IPC: H04N19/124 ,  H04N19/30

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.

公开(公告)号：AU2014272154A1

公开(公告)日：2015-12-17

申请号：AU2014272154

申请日：2014-04-01

Applicant: APPLE INC

Inventor： TOURAPIS ALEXANDROS

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

Abstract: An encoder system may include an analyzer that analyzes a current image area in an input video to select a transform. A selectable residue transformer, controlled by the analyzer, may perform the selectable transform on a residue image generated from the current image area and a predicted current image area, to generate a transformed residue image. An encoder may encode the transformed residue image to generate output data. The analyzer controls the encoder to encode information to identify the selectable transform and to indicate that the selectable transform for the current image area is different from a transform of a previous image area of the input video. A decoder system may include components appropriate for decoding the output data from the encoder system.