公开(公告)号：US20240306046A1

公开(公告)日：2024-09-12

申请号：US18669445

申请日：2024-05-20

Applicant: Apple Inc.

Inventor： Joe S. ABUAN ,  Ian J. BAIRD ,  Xiaosong ZHOU ,  Christopher M. GARRIDO ,  Dazhong ZHANG ,  Keith W. RAUENBUEHLER ,  Yan YANG ,  Patrick MIAUTON ,  Eric L. CHIEN ,  Berkat S. TUNG ,  Karthick SANTHANAM

IPC: H04W36/00 ,  G06F9/48 ,  H04B17/318 ,  H04B17/336 ,  H04L9/08 ,  H04L9/40 ,  H04L12/18 ,  H04L65/403 ,  H04L67/14 ,  H04L67/141 ,  H04L67/143 ,  H04W4/08 ,  H04W12/0433 ,  H04W12/06 ,  H04W36/02

CPC classification number: H04W36/0033 ,  G06F9/4856 ,  H04L9/0819 ,  H04L12/1822 ,  H04L12/1827 ,  H04L12/185 ,  H04L12/189 ,  H04L63/065 ,  H04L65/403 ,  H04L67/14 ,  H04L67/141 ,  H04L67/143 ,  H04W4/08 ,  H04W12/0433 ,  H04W12/06 ,  H04W36/0009 ,  H04W36/0016 ,  H04W36/0022 ,  H04W36/0027 ,  H04W36/0058 ,  H04W36/02 ,  H04B17/318 ,  H04B17/336

Abstract: A device implementing the subject technology may include at least one processor configured to receive downlink condition reports from device, each downlink condition report indicating a downlink channel condition of a respective device. The at least one processor is further configured to determine an uplink channel condition for each of the devices. The at least one processor is further configured to determine, for each respective device and based at least in part on the downlink condition reports and the uplink channel conditions, quality tiers, each of the quality tiers indicating a quality of at least one of an audio stream or a video stream. The at least one processor is further configured to provide for transmission, to each respective device, the quality tiers determined for the respective device.

公开(公告)号：US20210185361A1

公开(公告)日：2021-06-17

申请号：US17188473

申请日：2021-03-01

Applicant: Apple Inc.

Inventor： Xiaohua YANG ,  Alexandros TOURAPIS ,  Dazhong ZHANG ,  Hang YUAN ,  Hsi-Jung WU ,  Jae Hoon KIM ,  Jiefu ZHAI ,  Ming CHEN ,  Xiaosong ZHOU

IPC: H04N19/90 ,  H04N19/52 ,  H04N19/597 ,  G06F3/01 ,  H04N21/2343

Abstract: In communication applications, aggregate source image data at a transmitter exceeds the data that is needed to display a rendering of a viewport at a receiver. Improved streaming techniques that include estimating a location of a viewport at a future time. According to such techniques, the viewport may represent a portion of an image from a multi-directional video to be displayed at the future time, and tile(s) of the image may be identified in which the viewport is estimated to be located. In these techniques, the image data of tile(s) in which the viewport is estimated to be located may be requested at a first service tier, and the other tile in which the viewport is not estimated to be located may be requested at a second service tier, lower than the first service tier.

公开(公告)号：US20190068992A1

公开(公告)日：2019-02-28

申请号：US16173105

申请日：2018-10-29

Applicant: Apple Inc.

Inventor： Alexandros TOURAPIS ,  David W. SINGER ,  Haitao GUO ,  Hsi-Jung WU ,  Sorin C. CISMAS ,  Xiaohua YANG ,  Yeping SU ,  Dazhong ZHANG

IPC: H04N19/593 ,  H04N19/174 ,  H04N19/156 ,  H04N19/176 ,  H04N19/182 ,  H04N19/117

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.

公开(公告)号：US20250080759A1

公开(公告)日：2025-03-06

申请号：US18794601

申请日：2024-08-05

Applicant: APPLE INC.

Inventor： Guoxin JIN ,  Yeqing WU ,  Yunfei ZHENG ,  Dazhong ZHANG ,  Dzung T. HOANG ,  Felix C. FERNANDES ,  Van Luong PHAM ,  Jiancong LUO ,  Yixin DU ,  Hilmi Enes EGILMEZ ,  Alican NALCI ,  Jun XIN ,  Hsi-Jung WU

IPC: H04N19/176 ,  H04N19/117 ,  H04N19/159 ,  H04N19/46 ,  H04N19/70 ,  H04N19/82

Abstract: Techniques are disclosed for coding video in applications where regions of video are inactive on a frame to frame basis. According to the techniques, coding processes update and reconstruct only a subset of pixel blocks of pixels within a frame, while other pixel blocks are retained from a previously coded frame stored in a coder's or decoder's reference frame buffer. The technique is called Backward Reference Updating (or “BRU”) for convenience. At a desired pixel block granularity, based on the activity between a current frame to be coded and its reference frame(s), BRU will only perform prediction, transform, quantization, and reconstruction on selected regions that are determined to be active. The reconstructed pixels in these active regions are directly placed onto a specified reference frame in memory instead of creating a new frame. Therefore, fewer memory transfers need to be performed.

公开(公告)号：US20240397119A1

公开(公告)日：2024-11-28

申请号：US18797415

申请日：2024-08-07

Applicant: Apple Inc.

Inventor： Xiaohua YANG ,  Alexandros TOURAPIS ,  Dazhong ZHANG ,  Hang YUAN ,  Hsi-Jung WU ,  Jae Hoon KIM ,  Jiefu ZHAI ,  Ming CHEN ,  Xiaosong ZHOU

IPC: H04N19/90 ,  G06F3/01 ,  H04N19/52 ,  H04N19/597 ,  H04N21/2343

Abstract: In communication applications, aggregate source image data at a transmitter exceeds the data that is needed to display a rendering of a viewport at a receiver. Improved streaming techniques that include estimating a location of a viewport at a future time. According to such techniques, the viewport may represent a portion of an image from a multi-directional video to be displayed at the future time, and tile(s) of the image may be identified in which the viewport is estimated to be located. In these techniques, the image data of tile(s) in which the viewport is estimated to be located may be requested at a first service tier, and the other tile in which the viewport is not estimated to be located may be requested at a second service tier, lower than the first service tier.

公开(公告)号：US20130254620A1

公开(公告)日：2013-09-26

申请号：US13785859

申请日：2013-03-05

Applicant: Apple Inc.

Inventor： Xiaosong ZHOU ,  Hyeonkuk JEONG ,  Yan YANG ,  Dazhong ZHANG ,  Hsi-Jung WU

IPC: H03M13/05 ,  H03M13/29

CPC classification number: H03M13/05 ,  H03M13/1102 ,  H03M13/1515 ,  H03M13/152 ,  H03M13/27 ,  H03M13/29 ,  H03M13/2957 ,  H03M13/373 ,  H03M13/3746 ,  H04L1/005 ,  H04L1/0057 ,  H04L1/008

Abstract: Coded video data may be transmitted between an encoder and a decoder using multiple FEC codes and/or packets for error detection and correction. Only a subset of the FEC packets need be transmitted between the encoder and decoder. The FEC packets of each FEC group may take, as inputs, data packets of a current FEC group and also an untransmitted FEC packet of a preceding FEC group. Due to relationships among the FEC packets, when transmission errors arise and data packets are lost, there remain opportunities for a decoder to recover lost data packets from earlier-received FEC groups when later-received FEC groups are decoded. This opportunity to recover data packets from earlier FEC groups may be useful in video coding and other systems, in which later-received data often cannot be decoded unless earlier-received data is decoded properly.

Abstract translation: 可以在编码器和解码器之间使用多个用于错误检测和校正的FEC码和/或包进行编码的视频数据。 只有FEC数据包的一部分需要在编码器和解码器之间传输。 每个FEC组的FEC分组可以采用当前FEC组的数据分组和前一个FEC组的未发送FEC分组的输入。 由于FEC分组之间的关系，当传输错误出现并且数据分组丢失时，当稍后接收的FEC组被解码时，解码器仍然有机会恢复来自早先接收的FEC组的丢失的数据分组。 从先前的FEC组恢复数据分组的机会在视频编码和其他系统中可能是有用的，其中后期接收的数据通常不能被解码，除非先前接收到的数据被正确解码。

公开(公告)号：US20200177927A1

公开(公告)日：2020-06-04

申请号：US16204792

申请日：2018-11-29

Applicant: Apple Inc.

Inventor： Xiaohua YANG ,  Alexandros TOURAPIS ,  Dazhong ZHANG ,  Hang YUAN ,  Hsi-Jung WU ,  Jae Hoon KIM ,  Jiefu ZHAI ,  Ming CHEN ,  Xiaosong ZHOU

IPC: H04N19/90 ,  H04N21/2343 ,  G06F3/01 ,  H04N19/597 ,  H04N19/52

Abstract: In communication applications, aggregate source image data at a transmitter exceeds the data that is needed to display a rendering of a viewport at a receiver. Improved streaming techniques that include estimating a location of a viewport at a future time. According to such techniques, the viewport may represent a portion of an image from a multi-directional video to be displayed at the future time, and tile(s) of the image may be identified in which the viewport is estimated to be located. In these techniques, the image data of tile(s) in which the viewport is estimated to be located may be requested at a first service tier, and the other tile in which the viewport is not estimated to be located may be requested at a second service tier, lower than the first service tier.

公开(公告)号：US20170359596A1

公开(公告)日：2017-12-14

申请号：US15178304

申请日：2016-06-09

Applicant: Apple Inc.

Inventor： Jae Hoon Kim ,  Xiaosong ZHOU ,  Sudeng Hu ,  Chris CHUNG ,  Dazhong ZHANG ,  Hsi-Jung WU

IPC: H04N19/59 ,  H04N19/61 ,  H04N19/167 ,  H04N19/182

CPC classification number: H04N19/59 ,  H04N19/103 ,  H04N19/124 ,  H04N19/132 ,  H04N19/146 ,  H04N19/167 ,  H04N19/176 ,  H04N19/182 ,  H04N19/187 ,  H04N19/31 ,  H04N19/33 ,  H04N19/61 ,  H04N19/85

Abstract: Video coding techniques are disclosed that can accommodate low bandwidth events and preserve visual quality, at least in areas of an image that have high significance to a viewer. Region(s) of interest may be identified from content of input frame that will be coded. Two representations of the input frame may be generated at different resolutions. A low resolution representation of the input frame may be coded according to predictive coding techniques in which a portion outside the region of interest is coded at higher quality than a portion inside the region of interest. A high resolution representation of the input frame may be coded according to predictive coding techniques in which a portion inside the region of interest is coded at higher quality than a portion outside the region of interest. Doing so preserves visual quality, at least in areas of the input image that correspond to the region of interest.

公开(公告)号：US20170347112A1

公开(公告)日：2017-11-30

申请号：US15168872

申请日：2016-05-31

Applicant: Apple Inc.

Inventor： Dazhong ZHANG ,  Jae Hoon KIM ,  Peikang SONG ,  Xiaosong ZHOU ,  Chris CHUNG ,  Hsi-Jung WU

IPC: H04N19/46 ,  H04L12/741 ,  H04L5/00 ,  H04L29/06 ,  H04N19/68

CPC classification number: H04N19/46 ,  H04L5/0055 ,  H04L45/745 ,  H04L65/602 ,  H04L65/607 ,  H04L65/608 ,  H04L65/80 ,  H04N19/68

Abstract: Coding and decoding techniques are disclosed in which a plurality of coding parameter sets is transmitted between an encoder and a decoder, each of which is distinguishable from the others by a respective identifier. When a new frame of video is to be coded, an encoder may identify a coding parameter set to be applied during coding, it may code the new frame according to the identified coding parameter set, and it may transmit the coded frame to the decoder along with an identifier of the coding parameter set used during the coding. A plurality of coding parameter sets is persistent at an encoder and the decoder simultaneously.

公开(公告)号：US20240306047A1

公开(公告)日：2024-09-12

申请号：US18669446

申请日：2024-05-20

Applicant: Apple Inc.

Inventor： Joe S. ABUAN ,  Ian J. BAIRD ,  Xiaosong ZHOU ,  Christopher M. GARRIDO ,  Dazhong ZHANG ,  Keith W. RAUENBUEHLER ,  Yan YANG ,  Patrick MIAUTON ,  Eric L. CHIEN ,  Berkat S. TUNG ,  Karthick SANTHANAM

IPC: H04W36/00 ,  G06F9/48 ,  H04B17/318 ,  H04B17/336 ,  H04L9/08 ,  H04L9/40 ,  H04L12/18 ,  H04L65/403 ,  H04L67/14 ,  H04L67/141 ,  H04L67/143 ,  H04W4/08 ,  H04W12/0433 ,  H04W12/06 ,  H04W36/02

CPC classification number: H04W36/0033 ,  G06F9/4856 ,  H04L9/0819 ,  H04L12/1822 ,  H04L12/1827 ,  H04L12/185 ,  H04L12/189 ,  H04L63/065 ,  H04L65/403 ,  H04L67/14 ,  H04L67/141 ,  H04L67/143 ,  H04W4/08 ,  H04W12/0433 ,  H04W12/06 ,  H04W36/0009 ,  H04W36/0016 ,  H04W36/0022 ,  H04W36/0027 ,  H04W36/0058 ,  H04W36/02 ,  H04B17/318 ,  H04B17/336

Abstract: A device implementing the subject technology may include at least one processor configured to establish a group communication session for two or more electronic devices utilizing a first communication modality. The at least one processor may be further configured to determine to utilize a second communication modality for the group communication session. The at least one processor may be further configured to transition the group communication session from the first communication modality to the second communication modality.