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公开(公告)号:EP3286753A1
公开(公告)日:2018-02-28
申请号:EP16716128
申请日:2016-03-30
Applicant: APPLE INC
Inventor: WANG CHAOHAO , TRIPATHI BRIJESH , TANN CHRISTOPHER PHILIP ALAN , ZALATIMO DAVID S , COTE GUY , NAN HAO , ALBRECHT MARC , SACCHETTO PAOLO , PINTZ SANDRO H
IPC: G09G3/36
CPC classification number: G09G3/3614 , G09G2320/0204 , G09G2320/0247 , G09G2320/0257 , G09G2320/046 , G09G2340/0435 , G09G2360/16
Abstract: An electronic device may generate content that is to be displayed on a display. The display may have an array of liquid crystal display pixels for displaying image frames of the content. The image frames may be displayed with positive and negative polarities to help reduce charge accumulation effects. A charge accumulation tracker may analyze the image frames to determine when there is a risk of excess charge accumulation. The charge accumulation tracker may analyze information on gray levels, frame duration, and frame polarity. The charge accumulation tracker may compute a charge accumulation metric for entire image frames or may process subregions of each frame separately. When subregions are processed separately, each subregion may be individually monitored for a risk of excess charge accumulation.
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公开(公告)号:AU2023202567B2
公开(公告)日:2023-11-16
申请号:AU2023202567
申请日:2023-04-27
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.
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公开(公告)号:AU2023202567A1
公开(公告)日:2023-05-18
申请号:AU2023202567
申请日:2023-04-27
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.
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公开(公告)号:AU2020202363A1
公开(公告)日:2020-04-30
申请号:AU2020202363
申请日:2020-04-03
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.
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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.
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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.
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公开(公告)号:DE112015000959T5
公开(公告)日:2016-11-17
申请号:DE112015000959
申请日:2015-02-25
Applicant: APPLE INC
Inventor: BAI ANDREW , GREENEBAUM KENNETH I , GUO HAITAO , PAN HAO , COTE GUY
Abstract: Adaptive Videoverarbeitungsverfahren und -einrichtungen können durch eine Decodier-Pipeline und/oder Codier-Pipeline implementiert werden. Die adaptiven Videoverarbeitungsverfahren können Informationen berücksichtigen, die Videoinhalt, Anzeigeeigenschaften und Umgebungsbedingungen beinhalten, wenn sie Videoinhalt für ein Zielanzeigefeld in einem gegebenen Umfeld oder einer Umgebung verarbeiten und rendern. Die adaptiven Videoverarbeitungsverfahren können diese Informationen verwenden, um eine oder mehrere Videoverarbeitungsfunktionen, die an die Videodaten angelegt werden, anzupassen, um Video für das Zielanzeigefeld zu rendern, das gemäß den gegebenen Umgebungs- oder Betrachtungsbedingungen für das Anzeigefeld adaptiert ist.
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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.
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公开(公告)号:AU2010308351B2
公开(公告)日:2014-07-10
申请号:AU2010308351
申请日:2010-10-12
Applicant: APPLE INC
Inventor: COTE GUY , FREDERIKSEN JEFFREY E
Abstract: Various techniques for temporally filtering raw image data acquired by an image sensor are provided. In one embodiment, a temporal filter determines a spatial location of a current pixel and identifies at least one collocated reference pixel from a previous frame. A motion delta value is determined based at least partially upon the current pixel and its collocated reference pixel. Next, an index is determined based upon the motion delta value and a motion history value corresponding to the spatial location of the current pixel, but from the previous frame. Using the index, a first filtering coefficient may be selected from a motion table. After selecting the first filtering coefficient, an attenuation factor may be selected from a luma table based upon the value of the current pixel, and a second filtering coefficient may subsequently be determined based upon the selected attenuation factor and the first filtering coefficient. The temporally filtered output value corresponding to the current pixel may then be calculated based upon the second filtering coefficient, the current pixel, and the collocated reference pixel.
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50.
公开(公告)号:MX2013002452A
公开(公告)日:2013-08-29
申请号:MX2013002452
申请日:2011-08-25
Applicant: APPLE INC
Inventor: FREDERIKSEN JEFFREY E , COTE GUY , HUBEL MATTHEW PAUL , CHAWLA SUMIT
Abstract: Se divulgan diferentes técnicas para procesar datos de estadísticas en un procesador de señal de imagen (ISP). En una modalidad, un motor de recopilación de estadísticas puede estar configurado para adquirir estadísticas relacionadas con balance de blancos automático. El motor de recopilación de estadísticas puede recibir datos sin procesar adquiridos por un sensor de imagen y puede estar configurado para llevar a cabo una o más conversiones de espacio de color para obtener datos de pixel en otros espacios de color. Un conjunto de filtros de pixel puede estar configurado para acumular sumas de los datos de pixel condicionalmente con base en características de YC1C2, como se define por un filtro de condición de pixel por pixel. Dependiendo de un espacio de color seleccionado, los filtros de pixel pueden generar sumas de color, que se pueden utilizar para igualar un iluminante actual contra un conjunto de iluminantes de referencia con los cuales el sensor de imagen ha sido calibrado previamente.
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