公开(公告)号：US20140321534A1

公开(公告)日：2014-10-30

申请号：US14056043

申请日：2013-10-17

Applicant: Apple Inc.

Inventor： Yeping SU ,  Chris Y. CHUNG ,  Hao PAN ,  Hsi-Jung WU ,  Ke ZHANG

IPC: H04N19/117 ,  H04N19/124 ,  H04N19/139 ,  H04N19/136 ,  H04N19/179

CPC classification number: H04N19/117 ,  H04N19/136

Abstract: Video coding systems and methods are provided that protect against various artifacts (e.g., banding artifacts) in decoded frame content. The embodiments to protect against introducing artifacts include pre-processing the input video frame, controlling the encoding parameters and/or post-processing the decoded video frame. A method for encoding a frame may include calculating a dark-scene score for the frame based on measured statistics of the frame. The dark-scene score may be compared to a threshold to determine if the banding artifacts may be present in the frame. Based on the comparison, filtering parameters for the frame may be altered to reduce the amount of noise filtered from the frame. The frame may be filtered based on the altered filtering parameters and encoded.

Abstract translation: 提供了视频编码系统和方法，其防止解码的帧内容中的各种伪影（例如，带状伪影）。 防止引入伪像的实施例包括预处理输入视频帧，控制编码参数和/或后处理解码的视频帧。 用于编码帧的方法可以包括基于所测量的帧的统计来计算所述帧的暗场景得分。 暗场景得分可以与阈值进行比较，以确定条带伪像是否可能存在于帧中。 基于该比较，可以改变帧的滤波参数以减少从帧滤波的噪声量。 可以基于改变的滤波参数对帧进行滤波并进行编码。

公开(公告)号：US20230394081A1

公开(公告)日：2023-12-07

申请号：US18327125

申请日：2023-06-01

Applicant: Apple Inc.

Inventor： Shujie LIU ,  Xiaosong ZHOU ,  Hsi-Jung WU ,  Jiefu ZHAI ,  Ke ZHANG ,  Ming CHEN

IPC: G06F16/783 ,  G06T7/62 ,  G06F16/75

CPC classification number: G06F16/7837 ,  G06T7/62 ,  G06F16/75

Abstract: A video classification, indexing, and retrieval system is disclosed that classifies and retrieves video along multiple indexing dimensions. A search system may field queries identifying desired parameters of video, search an indexed database for videos that match the query parameters, and create clips extracted from responsive videos that are provided in response. In this manner, different queries may cause different clips to be created from a single video, each clip tailored to the parameters of the query that is received.

公开(公告)号：US20230396819A1

公开(公告)日：2023-12-07

申请号：US18327364

申请日：2023-06-01

Applicant: APPLE INC.

Inventor： Ke ZHANG ,  Xiaoxia SUN ,  Shujie LIU ,  Xiaosong ZHOU ,  Jian LI ,  Xun SHI ,  Jiefu ZHAI ,  Albert E KEINATH ,  Hsi-Jung WU ,  Jingteng XUE ,  Xingyu ZHANG ,  Jun XIN

IPC: H04N21/2343 ,  H04N7/01 ,  G06V40/16 ,  G06V40/20 ,  G06V30/10 ,  H04N21/231

CPC classification number: H04N21/2343 ,  H04N7/0127 ,  H04N21/231 ,  G06V40/20 ,  G06V30/10 ,  G06V40/172

Abstract: A video delivery system generates and stores reduced bandwidth videos from source video. The system may include a track generator that executes functionality of application(s) to be used at sink devices, in which the track generator generates tracks from execution of the application(s) on source video and generates tracks having a reduced data size as compared to the source video. The track generator may execute a first instance of application functionality on the source video, which identifies region(s) of interest from the source video. The track generator further may downsample the source video according to downsampling parameters, and execute a second instance of application functionality on the downsampled video. The track generator may determine, from a comparison of outputs from the first and second instances of the application, whether the output from the second instance of application functionality is within an error tolerance of the output from the first instance of application functionality. If so, the track generator may generate a track from the downsampled video. In this manner, the system generates tracks that enable reliable application operation when processed by sink devices but also have reduced size as compared to source video.

公开(公告)号：US20200380260A1

公开(公告)日：2020-12-03

申请号：US16882959

申请日：2020-05-26

Applicant: Apple Inc.

Inventor： Bartlomiej RYMKOWSKI ,  Robert BAILEY ,  Ethan TIRA-THOMPSON ,  Shuang GAO ,  Ben ENGLERT ,  Emilie KIM ,  Shujie LIU ,  Ke ZHANG ,  Vinay SHARMA ,  Xiaosong ZHOU

IPC: G06K9/00 ,  G06T7/73 ,  G06T7/246

Abstract: Techniques disclosed for managing video captured by an imaging device. Methods disclosed capture a video in response to a capture command received at the imaging device. Following a video capture, techniques for classifying the captured video based on feature(s) extracted therefrom, for marking the captured video based on the classification, and for generating a media item from the captured video according to the marking are disclosed. Accordingly, the captured video may be classified as representing a static event, and, as a result, a media item of a still image may be generated. Otherwise, the captured video may be classified as representing a dynamic event, and, as a result, a media item of a video may be generated.

公开(公告)号：US20210397826A1

公开(公告)日：2021-12-23

申请号：US17339249

申请日：2021-06-04

Applicant: Apple Inc.

Inventor： Xiaoxia SUN ,  Jiefu ZHAI ,  Ke ZHANG ,  Xiaosong ZHOU ,  Hsi-Jung WU

IPC: G06K9/00 ,  G06K9/46 ,  G06T3/40 ,  G06N3/04

Abstract: Video object and keypoint location detection techniques are presented. The system includes a detection system for generation locations of an object's keypoints along with probabilities associated with the locations, and a stability system for stabilizing keypoint locations of the detected objects. In some aspects, the generated probabilities are two-dimensional array correspond locations within input images, and stability system fits the generated probabilities to a two-dimensional probability distribution function.