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    IN LOOP CHROMA DEBLOCKING FILTER
    2.
    发明申请
    IN LOOP CHROMA DEBLOCKING FILTER 审中-公开

    公开(公告)号：US20200296426A1

    公开(公告)日：2020-09-17

    申请号：US16890245

    申请日：2020-06-02

    Applicant: Apple Inc.

    Inventor： Jiefu Zhai ,  Dazhong Zhang ,  Xiaosong Zhou ,  Chris Y. Chung ,  Hsi-Jung Wu ,  Peikang Song ,  David R. Conrad ,  Jae Hoon Kim ,  Yunfei Zheng

    IPC: H04N19/82 ,  H04N19/186

    Abstract: Chroma deblock filtering of reconstructed video samples may be performed to remove blockiness artifacts and reduce color artifacts without over-smoothing. In a first method, chroma deblocking may be performed for boundary samples of a smallest transform size, regardless of partitions and coding modes. In a second method, chroma deblocking may be performed when a boundary strength is greater than 0. In a third method, chroma deblocking may be performed regardless of boundary strengths. In a fourth method, the type of chroma deblocking to be performed may be signaled in a slice header by a flag. Furthermore, luma deblock filtering techniques may be applied to chroma deblock filtering.

    In loop chroma deblocking filter
    3.
    发明授权
    In loop chroma deblocking filter 有权

    公开(公告)号：US10708623B2

    公开(公告)日：2020-07-07

    申请号：US16050744

    申请日：2018-07-31

    Applicant: Apple Inc.

    Inventor： Jiefu Zhai ,  Dazhong Zhang ,  Xiaosong Zhou ,  Chris Y. Chung ,  Hsi-Jung Wu ,  Peikang Song ,  David R. Conrad ,  Jae Hoon Kim ,  Yunfei Zheng

    IPC: H04N19/82 ,  H04N19/186

    Abstract: Chroma deblock filtering of reconstructed video samples may be performed to remove blockiness artifacts and reduce color artifacts without over-smoothing. In a first method, chroma deblocking may be performed for boundary samples of a smallest transform size, regardless of partitions and coding modes. In a second method, chroma deblocking may be performed when a boundary strength is greater than 0. In a third method, chroma deblocking may be performed regardless of boundary strengths. In a fourth method, the type of chroma deblocking to be performed may be signaled in a slice header by a flag. Furthermore, luma deblock filtering techniques may be applied to chroma deblock filtering.

    In Loop Chroma Deblocking Filter
    4.
    发明申请
    In Loop Chroma Deblocking Filter 审中-公开

    公开(公告)号：US20180338161A1

    公开(公告)日：2018-11-22

    申请号：US16050744

    申请日：2018-07-31

    Applicant: Apple Inc.

    Inventor： Jiefu Zhai ,  Dazhong Zhang ,  Xiaosong Zhou ,  Chris Y. Chung ,  Hsi-Jung Wu ,  Peikang Song ,  David R. Conrad ,  Jae Hoon Kim ,  Yunfei Zheng

    IPC: H04N19/82 ,  H04N19/186

    CPC classification number: H04N19/82 ,  H04N19/186

    Abstract: Chroma deblock filtering of reconstructed video samples may be performed to remove blockiness artifacts and reduce color artifacts without over-smoothing. In a first method, chroma deblocking may be performed for boundary samples of a smallest transform size, regardless of partitions and coding modes. In a second method, chroma deblocking may be performed when a boundary strength is greater than 0. In a third method, chroma deblocking may be performed regardless of boundary strengths. In a fourth method, the type of chroma deblocking to be performed may be signaled in a slice header by a flag. Furthermore, luma deblock filtering techniques may be applied to chroma deblock filtering.

    VIDEO CODING TECHNIQUES FOR HIGH QUALITY CODING OF LOW MOTION CONTENT
    6.
    发明申请
    VIDEO CODING TECHNIQUES FOR HIGH QUALITY CODING OF LOW MOTION CONTENT 审中-公开
    用于低运动内容高品质编码的视频编码技术

    公开(公告)号：US20160360230A1

    公开(公告)日：2016-12-08

    申请号：US14730975

    申请日：2015-06-04

    Applicant: Apple Inc.

    Inventor： Peikang Song ,  Jae Hoon Kim ,  Xiaosong Zhou ,  Chris Y. Chung ,  Hsi-Jung Wu ,  Dazhong Zhang

    IPC: H04N19/53 ,  H04N19/31 ,  H04N19/137 ,  H04N19/85 ,  H04N19/70 ,  H04N19/117

    Abstract: Techniques for coding video data are described that maintain high precision coding for low motion video content. Such techniques include determining whether a source video sequence to be coded has low motion content. When the source video sequence contains low motion content, the video sequence may be coded as a plurality of coded frames using a chain of temporal prediction references among the coded frames. Thus, a single frame in the source video sequence is coded as a plurality of frames. Because the coded frames each represent identical content, the quality of coding should improve across the plurality of frames. Optionally, the disclosed techniques may increase the resolution at which video is coded to improve precision and coding quality.

    Abstract translation: 描述了用于对视频数据进行编码的技术，其维持低运动视频内容的高精度编码。 这样的技术包括确定要编码的源视频序列是否具有低运动内容。 当源视频序列包含低运动内容时，视频序列可以使用编码帧中的时间预测参考链来编码为多个编码帧。 因此，源视频序列中的单个帧被编码为多个帧。 由于编码帧各自表示相同的内容，所以编码的质量应该跨越多个帧而改善。 可选地，所公开的技术可以增加视频被编码的分辨率，以提高精度和编码质量。

    MEDIA FEED PRIORITIZATION FOR MULTI-PARTY CONFERENCING
    7.
    发明申请
    MEDIA FEED PRIORITIZATION FOR MULTI-PARTY CONFERENCING 审中-公开

    公开(公告)号：US20190342351A1

    公开(公告)日：2019-11-07

    申请号：US16405864

    申请日：2019-05-07

    Applicant: Apple Inc.

    Inventor： Christopher M. Garrido ,  Dazhong Zhang ,  Karthick Santhanam ,  Patrick Miauton ,  Xiaoxiao Zheng ,  Bess Chan ,  Peter Shiang ,  Sudeng Hu ,  Peikang Song ,  Xiaosong Zhou

    IPC: H04L29/06 ,  H04N21/235 ,  H04N21/6583 ,  H04L29/08

    Abstract: Techniques presented herein provide an improved relay user experience and improved management of scarce computing and network resources as the number of relay endpoints increases. A sourcing endpoint device may generate a media feed, such as video and/or audio feed, representing contribution from a conference participant. The sourcing endpoint device may generate a priority value for the media feed, and the priority value may be transmitted to other members of the relay along with the input feed. Priority values of the different relay participants may be used by other devices, for example, intermediate servers or receiving endpoint devices, to manage aspects of the relay. For example, a relay server may prune streams from select endpoint devices based on relative priority values received from those devices. Alternatively, receiving endpoint devices may alter presentation of received feeds based on their associated priority values.

    Dynamic Video Configurations
    9.
    发明申请
    Dynamic Video Configurations 审中-公开

    公开(公告)号：US20170359590A1

    公开(公告)日：2017-12-14

    申请号：US15585581

    申请日：2017-05-03

    Applicant: Apple Inc.

    Inventor： Dazhong Zhang ,  Hang Yuan ,  Peikang Song ,  Jae Hoon Kim ,  Xing Wen ,  Sudeng Hu ,  Xiaosong Zhou ,  Chris Y. Chung ,  Hsi-Jung Wu

    IPC: H04N19/423

    CPC classification number: H04N19/423 ,  H04N19/463 ,  H04N21/44004 ,  H04N21/6373 ,  H04N21/6379

    Abstract: Techniques are disclosed for managing memory allocations when coding video data according to multiple codec configurations. According to these techniques, devices may negotiate parameters of a coding session that include parameters of a plurality of different codec configurations that may be used during the coding session. A device may estimate sizes of decoded picture buffers for each of the negotiated codec configurations and allocate in its memory a portion of memory sized according to a largest size of the estimated decoded picture buffers. Thereafter, the devices may exchange coded video data. The exchange may involve decoding coded data of reference pictures and storing the decoded reference pictures in the allocated memory. During the coding session, the devices may toggle among the different negotiated codec configurations. As they do, reallocations of memory may be avoided.

    SELECTIVE PACKET AND DATA DROPPING TO REDUCE DELAY IN REAL-TIME VIDEO COMMUNICATION
    10.
    发明申请
    SELECTIVE PACKET AND DATA DROPPING TO REDUCE DELAY IN REAL-TIME VIDEO COMMUNICATION 审中-公开
    选择性分组和数据丢弃，以减少实时视频通信中的延迟

    公开(公告)号：US20160360220A1

    公开(公告)日：2016-12-08

    申请号：US14730830

    申请日：2015-06-04

    Applicant: Apple Inc.

    Inventor： Peikang Song ,  Jae Hoon Kim ,  Xiaosong Zhou ,  Chris Y. Chung ,  Hsi-Jung Wu ,  Dazhong Zhang

    IPC: H04N19/51 ,  H04N19/172 ,  H04N19/159 ,  H04N19/139 ,  H04N19/142

    CPC classification number: H04N19/172 ,  H04N19/132 ,  H04N19/139 ,  H04N19/142 ,  H04N19/154 ,  H04N19/159 ,  H04N19/164

    Abstract: Techniques are described for responding to changes in bandwidth that are available to transmit coded video data between an encoder and a decoder. When such changes in bandwidth occur, estimates may be derived of visual significance of coded video data that has not yet been transmitted and also video data that is next to be coded. These estimates may be compared to each other. When the estimated visual significance of the coded video data that has not yet been transmitted is greater than the estimated visual significance of the video data that is next to be coded, transmission of the coded video data that has not yet been transmitted may be prioritized over coding of the video data that is next to be coded. When the estimated visual significance of the video data that is next to be coded is greater than the estimated visual significance of the coded video data that has not yet been transmitted, coding of the video data that is next to be coded may be prioritized over transmission of the coded video data that has not yet been transmitted. Resources may be allocated to the prioritized coder operation.

    Abstract translation: 描述了用于响应可用于在编码器和解码器之间传输编码视频数据的带宽变化的技术。 当这种带宽变化发生时，可能导出尚未被发送的编码视频数据的视觉重要性的估计，以及接下来被编码的视频数据。 这些估计可以相互比较。 当尚未被发送的编码视频数据的估计视觉含义大于接下来要被编码的视频数据的估计视觉有效性时，还没有发送的编码视频数据的传输可以优先于 对接下来被编码的视频数据进行编码。 当接下来被编码的视频数据的估计视觉含义大于尚未发送的编码视频数据的估计视觉有效性时，下一个被编码的视频数据的编码可以通过传输优先化 的尚未被发送的编码视频数据。 可以将资源分配给优先编码器操作。

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