公开(公告)号：US20220279194A1

公开(公告)日：2022-09-01

申请号：US17671512

申请日：2022-02-14

Applicant: Apple Inc.

Inventor： Krishnakanth Rapaka ,  Alexandros Tourapis ,  David William Singer

IPC: H04N19/176 ,  H04N19/103 ,  H04N19/119 ,  H04N19/124 ,  H04N19/136 ,  H04N19/159 ,  H04N19/50

Abstract: A multi-stage coding method includes receiving an input block of data for encoding and one or more previously coded samples associated with the input block. The input block is segmented into at least a first sub-region and a second sub-region. A prediction for the first sub-region is generated based on the one or more previously coded samples. Residual data for the first sub-region is obtained using the prediction for the first sub-region. A reconstruction of the first sub-region is generated using the residual data for the first sub-region and the prediction for the first sub-region. A prediction for the second sub-region is generated using the reconstruction of the first sub-region. Residual data for the second sub-region is obtained using the prediction for the second sub-region. The input block is encoded based in part on the residual data for the first region and the residual data for the second region.

公开(公告)号：US11252418B2

公开(公告)日：2022-02-15

申请号：US17167413

申请日：2021-02-04

Applicant: Apple Inc.

Inventor： Krishnakanth Rapaka ,  Alexandros Tourapis ,  David William Singer

IPC: H04N19/176 ,  H04N19/103 ,  H04N19/119 ,  H04N19/124 ,  H04N19/136 ,  H04N19/159 ,  H04N19/50

Abstract: A multi-stage coding method includes receiving an input block of data for encoding and one or more previously coded samples associated with the input block. The input block is segmented into at least a first sub-region and a second sub-region. A prediction for the first sub-region is generated based on the one or more previously coded samples. Residual data for the first sub-region is obtained using the prediction for the first sub-region. A reconstruction of the first sub-region is generated using the residual data for the first sub-region and the prediction for the first sub-region. A prediction for the second sub-region is generated using the reconstruction of the first sub-region. Residual data for the second sub-region is obtained using the prediction for the second sub-region. The input block is encoded based in part on the residual data for the first region and the residual data for the second region.

公开(公告)号：US10136033B2

公开(公告)日：2018-11-20

申请号：US15650750

申请日：2017-07-14

Applicant: Apple Inc.

Inventor： Alexandros Michael Tourapis ,  Yeping Su ,  David William Singer ,  Hsi-Jung Wu

IPC: H04N1/60 ,  H04N9/67 ,  H04N19/186 ,  H04N19/46 ,  H04N19/85

Abstract: Image and video processing techniques are disclosed for processing components of a color space individually by determining limits for each component based on the relationship between each component in a color space. These limits may then be used to clip each component such that the component values are within the determined range for that component. In this manner, more efficient processing of images and/or video may be achieved.

公开(公告)号：US20160360234A1

公开(公告)日：2016-12-08

申请号：US15172064

申请日：2016-06-02

Applicant: Apple Inc.

Inventor： Alexandros Michael Tourapis ,  David William Singer ,  Haitao Guo ,  Hsi-Jung Wu ,  Sorin C. Cismas ,  Xiaohua Yang ,  Yeping Su ,  Dazhong Zhang

IPC: H04N19/593 ,  H04N19/182 ,  H04N19/176

CPC classification number: H04N19/593 ,  H04N19/117 ,  H04N19/156 ,  H04N19/174 ,  H04N19/176 ,  H04N19/182

Abstract: Methods are described for encoding and decoding blocks of image data using intra block copying (IBC). A source block for intra block copying is selected from a source region of a current image that is closer to the current block than a threshold, wherein the source region does not include a portion of the current image that is further from the current block than the threshold.

Abstract translation: 描述了使用块内复制（IBC）对图像数据块进行编码和解码的方法。 从当前图像的比当前块更靠近阈值的源区域中选择用于帧内块复制的源块，其中源区域不包括当前图像的比当前块更远的部分， 阈。

公开(公告)号：US20160073128A1

公开(公告)日：2016-03-10

申请号：US14929145

申请日：2015-10-30

Applicant: APPLE INC.

Inventor： Barin Geoffry Haskell ,  David William Singer ,  Adriana Dumitras ,  Atul Puri

IPC: H04N19/513 ,  H04N19/91 ,  H04N19/61 ,  H04N19/46 ,  H04N19/577 ,  H04N19/587

CPC classification number: H04N19/513 ,  G06T9/005 ,  H04N19/13 ,  H04N19/132 ,  H04N19/176 ,  H04N19/40 ,  H04N19/43 ,  H04N19/44 ,  H04N19/46 ,  H04N19/503 ,  H04N19/51 ,  H04N19/577 ,  H04N19/587 ,  H04N19/61 ,  H04N19/91 ,  H04N21/4305

Abstract: A method and apparatus for variable accuracy inter-picture timing specification for digital video encoding is disclosed. Specifically, the present invention discloses a system that allows the relative timing of nearby video pictures to be encoded in a very efficient manner. In one embodiment, the display time difference between a current video picture and a nearby video picture is determined. The display time difference is then encoded into a digital representation of the video picture. In a preferred embodiment, the nearby video picture is the most recently transmitted stored picture. For coding efficiency, the display time difference may be encoded using a variable length coding system or arithmetic coding. In an alternate embodiment, the display time difference is encoded as a power of two to reduce the number of bits transmitted.

公开(公告)号：US20150131712A1

公开(公告)日：2015-05-14

申请号：US14599285

申请日：2015-01-16

Applicant: Apple Inc.

Inventor： Barin Geoffry Haskell ,  David William Singer ,  Thomas Pun ,  Hsi-Jung Wu ,  James Oliver Normile

IPC: H04N19/30

CPC classification number: H04N19/30 ,  H04N19/132 ,  H04N19/187 ,  H04N19/196 ,  H04N19/33 ,  H04N19/46 ,  H04N19/61 ,  H04N21/234327 ,  H04N21/2389 ,  H04N21/2662 ,  H04N21/4385 ,  H04N21/64792 ,  H04N21/6582 ,  H04N21/8451

Abstract: Scalable video coding and multiplexing compatible with non-scalable decoders is disclosed. In some embodiments, video data is received and encoded in a manner that renders at least a base layer to be compatible with a non-scalable video encoding standard, including by assigning for at least the base layer default values to one or more scalability parameters. In some embodiments, video data is received and encoded to produce an encoded video data that includes a base layer that conforms to a non-scalable video encoding standard and one or more subordinate non-scalable layers, which subordinate non-scalable layers do not by themselves conform to the non-scalable video encoding standard but which can he combined with the base layer to produce a result that does conform to the non-scalable video encoding standard, such that the result can be decoded by a non-scalable decoder. An identification data identifying those portions of the encoded video data that are associated with a subordinate non-scalable layer is included in the encoded video data.

Abstract translation: 公开了与不可扩展解码器兼容的可扩展视频编码和复用。 在一些实施例中，视频数据以使至少基本层与不可扩展视频编码标准兼容的方式被接收和编码，包括通过将至少基本层默认值分配给一个或多个可伸缩性参数。 在一些实施例中，视频数据被接收和编码以产生编码的视频数据，该编码视频数据包括符合不可分级视频编码标准的基本层和一个或多个从属非可缩放层，其中不可扩展层不由 它们符合不可扩展视频编码标准，但是它可以与基本层组合以产生符合非可分级视频编码标准的结果，使得结果可以由不可扩展解码器解码。 识别与下级不可缩放层相关联的编码视频数据部分的识别数据被包括在编码视频数据中。

公开(公告)号：US20130343657A1

公开(公告)日：2013-12-26

申请号：US13961034

申请日：2013-08-07

Applicant: Apple Inc.

Inventor： David William Singer ,  Courtney Ann Kennedy

IPC: G06K9/00 ,  G06T7/00

CPC classification number: H04N5/907 ,  G06F17/30265 ,  G06F17/30793 ,  G06F17/30817 ,  G06K9/00221 ,  G06K9/00255 ,  G06K9/46 ,  G06T7/73

Abstract: A perimeter around a detected object in a frame of image data can be generated in a first coordinate system. The perimeter can be converted from the first coordinate system into a second coordinate system having the same aspect ratio as the first coordinate system. A first metadata entry can include dimensions of image data in the second coordinate system. A second metadata entry can provide a location and dimensions of the converted perimeter in the second coordinate space. Additional metadata can indicate matching objects between frames, position of an object relative to other objects in a frame, a probability that an object is correctly detected, and a total number of objects detected across multiple frames of image data.