公开(公告)号：US10715816B2

公开(公告)日：2020-07-14

申请号：US15349989

申请日：2016-11-11

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  David W. Singer ,  Hsi-Jung Wu ,  Yeping Su

IPC: H04N19/154 ,  H04N19/61 ,  H04N19/124 ,  H04N19/13 ,  H04N19/15 ,  H04N19/105 ,  H04N19/51 ,  H04N9/64 ,  H04N1/64 ,  H04N9/67 ,  H04N19/17 ,  H04N19/186

Abstract: Techniques for selecting a luminance value for color space conversion are disclosed. Techniques include determining values for Cb and Cr from values for R′, G′, and B′; producing a reconstructed Cb* value and a reconstructed Cr* value by processing the Cb and Cr values; and determining a plurality of Y′ value options from the values for Cb* and Cr*. A Y′ output value may be selected based on the plurality of Y′ value options.

公开(公告)号：US09344720B2

公开(公告)日：2016-05-17

申请号：US13715088

申请日：2012-12-14

Applicant: Apple Inc.

Inventor： David W. Singer ,  Alexandros Tourapis ,  Athanasios Leontaris ,  Xiaosong Zhou

IPC: H04N11/04 ,  H04N19/13 ,  H04N19/70 ,  H04N19/117 ,  H04N19/174 ,  H04N19/436

CPC classification number: H04N19/13 ,  H04N19/117 ,  H04N19/174 ,  H04N19/436 ,  H04N19/70

Abstract: In a communication system, parallel encoding and decoding of serially-coded data occurs in a manner that supports low latency communication. A plurality of data items may be coded as serially-coded data sequences and a transmission sequence may be built from them. An index table may be built having a plurality of entries representing respective start points of the serially-coded data sequences within the transmission sequence. The transmission sequence may be transmitted to a channel and, thereafter, the index table may be transmitted. Latencies otherwise involved in inserting an index table into the beginning of a transmission sequence may be avoided.

Abstract translation: 在通信系统中，串行编码数据的并行编码和解码以支持低延迟通信的方式发生。 多个数据项可以被编码为串行编码数据序列，并且可以从它们构建传输序列。 可以构建索引表，其具有表示传输序列内的串行编码数据序列的相应开始点的多个条目。 发送序列可以被发送到信道，此后可以发送索引表。 可以避免将索引表插入到传输序列的开始处的延迟。

公开(公告)号：US20130279882A1

公开(公告)日：2013-10-24

申请号：US13631194

申请日：2012-09-28

Applicant: APPLE INC.

Inventor： David W. Singer

IPC: H04N7/26 ,  H04N9/80

CPC classification number: H04N19/46 ,  H04N19/114 ,  H04N19/177 ,  H04N19/70

Abstract: A new file format for coded video data is provided. A decoder may identify patterns in the coded video data in order to make the decoding process and/or display of data more efficient. Such patterns may be predefined and stored at the decoder, may be defined by each encoder and exchanged during terminal initialization, or may be transmitted and/or stored with the associated video data. Initialization information associated with the fragments of video data may also provide for carouseling initialization updates such that the initialization fragments may indicate either that the initialization information should be updated or that the decoder should be re-initialized. Additionally, media files or segments may be broken into fragments and each segment may have an index to provide for random access to the media data of the segment.

Abstract translation: 提供了一种用于编码视频数据的新文件格式。 解码器可以识别编码视频数据中的模式，以便使解码处理和/或数据显示更有效。 这样的模式可以被预先定义并存储在解码器处，可以由每个编码器定义并且在终端初始化期间进行交换，或者可以与相关联的视频数据一起发送和/或存储。 与视频数据片段相关联的初始化信息还可以提供循环初始化更新，使得初始化片段可以指示应该更新初始化信息或者应该重新初始化解码器。 此外，媒体文件或片段可以被分解成片段，并且每个片段可以具有索引以提供对片段的媒体数据的随机访问。

公开(公告)号：US12058361B2

公开(公告)日：2024-08-06

申请号：US17723788

申请日：2022-04-19

Applicant: Apple Inc.

Inventor： Krishnakanth Rapaka ,  Alexandros Tourapis ,  David W. Singer

IPC: H04N19/503 ,  H04N19/82 ,  H04N19/86

CPC classification number: H04N19/503 ,  H04N19/82 ,  H04N19/86

Abstract: Predictive coding techniques may include resampling of reference pictures, where various coding parameters are determined based on the resolution(s) or pixel format(s) of the prediction references. In a first aspect, lists of weights for use in weighted prediction are based on the resolution(s) of prediction references. In a second aspect, resampling filter parameters are selected based on the resolutions of prediction references. In a third aspect, deblocking filter parameters are based on the resolution(s) of prediction references.

公开(公告)号：US11758133B2

公开(公告)日：2023-09-12

申请号：US16834611

申请日：2020-03-30

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  David W. Singer ,  Dominik Mehlem ,  Krishnakanth Rapaka

IPC: H04N19/119 ,  H04N19/159 ,  H04N19/543 ,  H04N19/176 ,  H04N19/573 ,  H04N19/139

CPC classification number: H04N19/119 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/543 ,  H04N19/573

Abstract: Techniques for coding and decoding video may include predicting picture regions defined by a time-varying tessellation and/or by a tessellation that varies spatially within a picture. These techniques improve decoded video quality, for example, by reducing block-based visual artifacts. Tessellation patterns may be irregular spatially to prevent alignment of some prediction region boundaries within a picture. Tessellation patterns may vary over time based on a spatial offset value, and the spatial offset value may be determined via a modulo function. Tessellation patterns may include overlapped shapes, for example when used in conjunction with overlapped block motion compensation.

公开(公告)号：US11606569B2

公开(公告)日：2023-03-14

申请号：US16583153

申请日：2019-09-25

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  Yeping Su ,  Khaled Mammou ,  Jungsun Kim ,  David W. Singer ,  Fabrice A. Robinet ,  Guy Cote ,  Jim C. Chou ,  Hsi-Jung Wu

IPC: H04N19/186 ,  H04N19/159 ,  H04N19/176 ,  H04N19/124

Abstract: Support for additional components may be specified in a coding scheme for image data. A layer of a coding scheme that specifies color components may also specify additional components. Characteristics of the components may be specified in the same layer or a different layer of the coding scheme. An encoder or decoder may identify the specified components and determine the respective characteristics to perform encoding and decoding of image data.

公开(公告)号：US11282238B2

公开(公告)日：2022-03-22

申请号：US17032711

申请日：2020-09-25

Applicant: Apple Inc.

Inventor： Khaled Mammou ,  Yeping Su ,  David W. Singer ,  Alexandros Tourapis ,  Fabrice A. Robinet ,  Hsi-Jung Wu

IPC: G06T7/20 ,  G06T9/00 ,  G06T7/50 ,  H04N19/172 ,  G06T5/00 ,  G06T19/20

Abstract: A system comprises an encoder configured to compress attribute information and/or spatial for a point cloud and/or a decoder configured to decompress compressed attribute and/or spatial information for the point cloud. To compress the attribute and/or spatial information, the encoder is configured to convert a point cloud into an image based representation. Also, the decoder is configured to generate a decompressed point cloud based on an image based representation of a point cloud. The encoder is configured project the point cloud on to patch planes to compress the point cloud, and supports multiple layered patch planes. For example, some point clouds may have a depth, and points at different depths may be assigned to different layered patch planes.

公开(公告)号：US20210160523A1

公开(公告)日：2021-05-27

申请号：US16799423

申请日：2020-02-24

Applicant: Apple Inc.

Inventor： Krishnakanth Rapaka ,  Alexandros Tourapis ,  David W. Singer

IPC: H04N19/503 ,  H04N19/82 ,  H04N19/86

Abstract: Predictive coding techniques may include resampling of reference pictures, where various coding parameters are determined based on the resolution(s) or pixel format(s) of the prediction references. In a first aspect, lists of weights for use in weighted prediction are based on the resolution(s) of prediction references. In a second aspect, resampling filter parameters are selected based on the resolutions of prediction references. In a third aspect, deblocking filter parameters are based on the resolution(s) of prediction references.

公开(公告)号：US20210006833A1

公开(公告)日：2021-01-07

申请号：US16912617

申请日：2020-06-25

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  Jungsun Kim ,  Khaled Mammou ,  David W. Singer ,  Fabrice A. Robinet

IPC: H04N19/597 ,  H04N19/467

Abstract: A system comprises an encoder configured to compress attribute information and/or spatial for a point cloud and/or a decoder configured to decompress compressed attribute and/or spatial information for the point cloud. To compress the attribute and/or spatial information, the encoder is configured to convert a point cloud into an image based representation. Also, the decoder is configured to generate a decompressed point cloud based on an image based representation of a point cloud. Additionally, an encoder is configured to signal and/or a decoder is configured to receive a supplementary message comprising volumetric tiling information that maps portions of 2D image representations to objects in the point. In some embodiments, characteristics of the object may additionally be signaled using the supplementary message or additional supplementary messages.

公开(公告)号：US10789733B2

公开(公告)日：2020-09-29

申请号：US16198634

申请日：2018-11-21

Applicant: Apple Inc.

Inventor： Khaled Mammou ,  Yeping Su ,  David W. Singer ,  Alexandros Tourapis ,  Fabrice A. Robinet ,  Hsi-Jung Wu

IPC: G06T7/50 ,  G06T9/00 ,  G06T7/20 ,  H04N19/172 ,  G06T5/00 ,  G06T19/20

Abstract: A system comprises an encoder configured to compress attribute information and/or spatial for a point cloud and/or a decoder configured to decompress compressed attribute and/or spatial information for the point cloud. To compress the attribute and/or spatial information, the encoder is configured to convert a point cloud into an image based representation. Also, the decoder is configured to generate a decompressed point cloud based on an image based representation of a point cloud. The encoder is configured project the point cloud on to patch planes to compress the point cloud, and supports multiple layered patch planes. For example, some point clouds may have a depth, and points at different depths may be assigned to different layered patch planes.