中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

162 records (took 0.023 seconds)

    HIERARCHICAL POINT CLOUD COMPRESSION
    82.
    发明申请
    HIERARCHICAL POINT CLOUD COMPRESSION 审中-公开

    公开(公告)号：US20190081638A1

    公开(公告)日：2019-03-14

    申请号：US16133674

    申请日：2018-09-17

    Applicant: Apple Inc.

    Inventor： Khaled Mammou ,  Fabrice A. Robinet ,  Alexandros Tourapis ,  Yeping Su

    IPC: H03M7/30 ,  H04N19/60 ,  H04N19/436 ,  H04N19/96

    Abstract: A system comprises an encoder configured to compress attribute information for a point cloud and/or a decoder configured to decompress compressed attribute information for the point cloud. Attribute values for at least one starting point are included in a compressed attribute information file and attribute correction values used to correct predicted attribute values are included in the compressed attribute information file. Attribute values are predicted based, at least in part, on attribute values of neighboring points and distances between a particular point for whom an attribute value is being predicted and the neighboring points. The predicted attribute values are compared to attribute values of a point cloud prior to compression to determine attribute correction values. A decoder follows a similar prediction process as an encoder and corrects predicted values using attribute correction values included in a compressed attribute information file.

    Deblocking filter for high dynamic range (HDR) video
    83.
    发明授权
    Deblocking filter for high dynamic range (HDR) video 有权

    公开(公告)号：US10212456B2

    公开(公告)日：2019-02-19

    申请号：US15612806

    申请日：2017-06-02

    Applicant: Apple Inc.

    Inventor： Mei Guo ,  Feng Yi ,  Jun Xin ,  Chris Y. Chung ,  Yeping Su ,  Xiaosong Zhou ,  Jun Xu ,  Hsi-Jung Wu ,  Jingteng Xue

    IPC: H04N19/86 ,  H04N19/117 ,  H04N19/159

    Abstract: Methods of in-loop deblocking filter for high dynamic range (HDR) video compression are disclosed. HDR processing and standard dynamic range (SDR) processing adopt different electro-optical transfer function (EOTF) to convert digital code words to linear luminance. For compressing HDR video, EOTF is proposed to be involved in the selection of two deblocking parameters, β and tC, which control the strength of deblocking filter. In local activity checking for filter decisions, the calculated local signal characteristics and the thresholds are adjusted according to EOTF. After deblocking filter, the clipping range is modified based on EOTF. The chroma deblocking filter is also extended to inter-inter block boundary.

    Content Adaptation for Streaming
    85.
    发明申请
    Content Adaptation for Streaming 审中-公开

    公开(公告)号：US20170359580A1

    公开(公告)日：2017-12-14

    申请号：US15614881

    申请日：2017-06-06

    Applicant: Apple Inc.

    Inventor： Yeping Su ,  Xingyu Zhang ,  Chris Chung ,  Jun Xin ,  Hsi-Jung Wu

    IPC: H04N19/139 ,  H04N19/103 ,  H04N19/44 ,  G06N99/00 ,  H04N21/845

    CPC classification number: G06N20/00 ,  H04N19/103 ,  H04N19/136 ,  H04N19/179 ,  H04N21/23439 ,  H04N21/8456

    Abstract: Techniques are disclosed by which a coding parameter is determined to encode video data resulting in encoded video data possessing a highest possible video quality. Features may be extracted from an input video sequence. The extracted features may be compared to features described in a model of coding parameters generated by a machine learning algorithm from reviews of previously-coded videos, extracted features of the previously-coded videos, and coding parameters of the previously-coded videos. When a match is detected between the extracted features of the input video sequence and extracted features represented in the model, a determination may be made as to whether coding parameters that correspond to the matching extracted feature correspond to a tier of service to which the input video sequence is to be coded. When the coding parameters that correspond to the matching extracted feature correspond to the tier of service to which the input video sequence is to be coded, the input video sequence may be coded according to the coding parameters.

    Environment-Aware Supervised HDR Tone Mapping
    86.
    发明申请
    Environment-Aware Supervised HDR Tone Mapping 审中-公开

    公开(公告)号：US20170353704A1

    公开(公告)日：2017-12-07

    申请号：US15611636

    申请日：2017-06-01

    Applicant: Apple Inc.

    Inventor： Yeping Su ,  Chris Chung ,  Hsi-Jung Wu ,  Xiaosong Zhou ,  Jun Xin ,  Jun Xu

    IPC: H04N9/64 ,  G06T5/00 ,  H04N5/58

    Abstract: Embodiments of the present disclosure provide techniques for environment aware supervised HDR tone mapping. According to those techniques, responsive to metadata provided with HDR source video data, the received metadata may be compared to sensor date representing viewing conditions at a display device. Tone mapping corrections to the HDR source video data may be derived from the comparison of the received metadata to the sensor data. The HDR source video data may be altered based on the tone mapping corrections. The altered HDR source video data may be used to drive the display device.

    PREVENTING I-FRAME POPPING IN VIDEO ENCODING AND DECODING
    87.
    发明申请
    PREVENTING I-FRAME POPPING IN VIDEO ENCODING AND DECODING 审中-公开
    在视频编码和解码中防止I-FRAME POPPING

    公开(公告)号：US20160360219A1

    公开(公告)日：2016-12-08

    申请号：US14732615

    申请日：2015-06-05

    Applicant: Apple Inc.

    Inventor： Feng Yi ,  Yeping Su ,  Chris Y. Chung ,  Hsi-Jung Wu ,  Xiaosong Zhou

    IPC: H04N19/50 ,  H04N19/61

    CPC classification number: H04N19/105 ,  H04N19/107 ,  H04N19/124 ,  H04N19/157 ,  H04N19/172

    Abstract: Methods and systems provide video compression to reduce a “popping” effect caused by differences in quality between a refresh frame (e.g., I-frame or IDR-frame) and neighboring frame(s). In an embodiment, a quality of a pre-definable number of frames preceding a refresh frame (“preceding frames”) may be increased. A quantization parameter may be decreased for a region within at least one of the preceding frame(s). In an embodiment, preceding frames may be coded according to an open group of pictures (“GOP”) structure. In an embodiment, a refresh frame may be first coded as a P-frame, then coded based on the coded P-frame. In an embodiment, preceding frames may be first coded based on the refresh frame, then coded based on the coded frames without referencing the refresh frame. Each of these methods may increase consistency of quality in a sequence of frames, and, correspondingly, minimize or remove I-frame popping.

    Abstract translation: 方法和系统提供视频压缩以减少由刷新帧（例如，I帧或IDR帧）与相邻帧之间的质量差引起的“弹出”效应。 在一个实施例中，可以增加在刷新帧（“前一帧”）之前的可预定数量的帧的质量。 可以针对前一帧中的至少一个中的区域减小量化参数。 在一个实施例中，可以根据打开的图像组（“GOP”）结构对前面的帧进行编码。 在一个实施例中，可以将刷新帧首先编码为P帧，然后基于编码的P帧进行编码。 在一个实施例中，先前的帧可以基于刷新帧进行首先编码，然后基于编码的帧进行编码，而不参考刷新帧。 这些方法中的每一种可以增加帧序列中的质量的一致性，并且相应地最小化或去除I帧弹出。

    PLAYBACK OF VIDEO ON DEMAND
    88.
    发明申请
    PLAYBACK OF VIDEO ON DEMAND 审中-公开
    播放视频的需求

    公开(公告)号：US20150350714A1

    公开(公告)日：2015-12-03

    申请号：US14290227

    申请日：2014-05-29

    Applicant: Apple Inc.

    Inventor： James O. Normile ,  Hsi-Jung Wu ,  Xiaosong Zhou ,  Chris Y. Chung ,  Ke Zhang ,  Yeping Su

    IPC: H04N21/433 ,  H04N21/258 ,  H04N21/437 ,  H04N21/81

    CPC classification number: H04N21/433 ,  H04L65/4084 ,  H04L67/1078 ,  H04L67/108 ,  H04N21/231 ,  H04N21/25891 ,  H04N21/26258 ,  H04N21/432 ,  H04N21/437 ,  H04N21/6587 ,  H04N21/812 ,  H04N21/8456 ,  H04N21/85406

    Abstract: A method and system for caching and streaming media content, including predictively delivering and/or acquiring content is provided. In the system, client devices may be communicatively coupled in a network, and may access and share cached content. Video segments making up a media stream may be selectively delivered to the clients such that a complete media stream may be formed from the different segments delivered to the different clients. Video segments may be pushed by the server to the client or requested by the client according to a prioritization scheme, including downloading: partial items on a client's subscription log, lower quality version(s) of content before higher quality version(s), higher bitrate segments before lower bitrate segments, summaries of full-length content, advertisements and splash screens common to multiple video clips.

    Abstract translation: 提供了一种用于缓存和流式传输媒体内容的方法和系统，包括预测地传递和/或获取内容。 在系统中，客户机设备可以通信地耦合在网络中，并且可以访问和共享缓存的内容。 构成媒体流的视频片段可以被选择性地传递到客户端，使得可以从递送到不同客户端的不同片段形成完整的媒体流。 视频片段可以由服务器推送到客户端或由客户端根据优先化方案请求，包括下载：客户端订阅日志上的部分项目，较高质量版本之前的较低质量版本的内容，更高质量版本 低比特率段之间的比特率段，多个视频剪辑共有的全长内容，广告和闪屏的总结。

    MASKING VIDEO ARTIFACTS WITH COMFORT NOISE
    89.
    发明申请
    MASKING VIDEO ARTIFACTS WITH COMFORT NOISE 审中-公开
    用舒适的噪音掩蔽视频作品

    公开(公告)号：US20130235931A1

    公开(公告)日：2013-09-12

    申请号：US13631689

    申请日：2012-09-28

    Applicant: APPLE INC.

    Inventor： Yeping Su ,  Hsi-Jung Wu ,  Chris Y. Chung

    IPC: H04N7/24 ,  H04N7/32

    CPC classification number: H04N19/86 ,  H04N19/46

    Abstract: A system and method is presented to mask artifacts with content-adaptive comfort noise. Encoder side analysis may determine initial comfort noise characteristics. Noise parameters may then be developed for each frame or sequence of frames that define comfort noise patches that mask the artifacts. At the decoder, a comfort noise patch can be fetched from memory or created based on the amplitude and spatial characteristics of the comfort noise specified in the noise parameters. The noise patch may additionally be scaled or otherwise adjusted to accommodate the capabilities and/or limitations of the specific decoder.

    Abstract translation: 提出了一种系统和方法来掩盖具有内容自适应舒适噪声的伪影。 编码器侧分析可以确定初始舒适噪声特性。 然后，可以为定义可以掩蔽伪像的舒适噪声补丁的每个帧或帧序列开发噪声参数。 在解码器处，可以根据噪声参数中规定的舒适噪声的幅度和空间特征，从存储器中获取舒适噪声补丁或创建舒适噪声补丁。 另外可以对噪声补丁进行缩放或调整以适应特定解码器的能力和/或限制。

Patent Agency Ranking