公开(公告)号：WO2014163867A2

公开(公告)日：2014-10-09

申请号：PCT/US2014/018285

申请日：2014-02-25

Applicant: APPLE INC.

Inventor： SU, Yeping ,  CHUNG, Chris, Y. ,  ZHOU, Xiaosong ,  NORMILE, James, Oliver ,  WU, Hsi-Jung ,  JANSEN, Thomas ,  JEONG, Hyeonkuk ,  ABUAN, Joe, S. ,  PRICE, Douglas, Scott

IPC: H04N21/2343

CPC classification number: H04N21/234372 ,  H04N21/23439 ,  H04N21/2381 ,  H04N21/4384 ,  H04N21/44004

Abstract: A video streaming method for transitioning between multiple sequences of coded video data may include receiving and decoding transmission units from a first sequence of coded video data. In response to a request to transition to a second sequence of coded video data, the method may determine whether a time to transition to the second sequence of coded video data can be reduced by transitioning to the second sequence of coded video data via an intermediate sequence of coded video data. If the time can be reduced, the method may include receiving at least one transmission unit from an intermediate sequence of coded video data that corresponds to the request to transition, decoding the transmission unit from the intermediate sequence, and transitioning from the first sequence to the second sequence via the decoded transmission unit from the intermediate sequence.

Abstract translation: 用于在多个编码视频数据序列之间转换的视频流方法可以包括从第一编码视频数据序列接收和解码传输单元。 响应于转换到第二编码视频数据序列的请求，该方法可以通过经由中间序列转换到第二编码视频数据序列来确定是否可以减少转换到第二编码视频数据序列的时间 的编码视频数据。 如果可以减少时间，则该方法可以包括从与转换请求对应的编码视频数据的中间序列接收至少一个传输单元，从中间序列解码传输单元，以及从第一序列转换到 通过来自中间序列的解码传输单元的第二序列。

公开(公告)号：WO2015006167A8

公开(公告)日：2015-01-15

申请号：PCT/US2014/045450

申请日：2014-07-03

Applicant: APPLE INC.

Inventor： BIDERMAN, David, L. ,  ZHOU, Xiaosong ,  PRICE, Douglas, Scott ,  SU, Yeping ,  CHUNG, Chris, Y. ,  WU, Hsi-Jung ,  LI, Zhenheng ,  SU, John ,  BATSON, James, D.

IPC: H04N21/4402 ,  H04N21/6587

Abstract: System and methods for improved playback of a video stream are presented. Video snippets are identified that include a number of consecutive frames for playback. Snippets may be evenly temporally spaced in the video stream or may be content adaptive. Then the first frame of a snippet may be selected as the first frame of a scene or other appropriate stopping point. Scene detection, object detection, motion detection, video metadata, or other information generated during encoding or decoding of the video stream may aid in appropriate snippet selection.

公开(公告)号：WO2013006469A1

公开(公告)日：2013-01-10

申请号：PCT/US2012/045032

申请日：2012-06-29

Applicant: APPLE INC. ,  PRICE, Douglas, Scott ,  ZHOU, Xiaosong ,  WU, Hsi-Jung

Inventor： PRICE, Douglas, Scott ,  ZHOU, Xiaosong ,  WU, Hsi-Jung

IPC: H04N7/26

CPC classification number: H04N19/154 ,  H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/14 ,  H04N19/172

Abstract: A system an method for determining to select frames from a video sequence that have high visual appeal and can be coded at high quality when frame rates of coded video drop to such low levels that perceptual sensations of moving video are lost. A metric is derived from a candidate input frame, and such metric is used to determine whether to increase or decrease a weight accorded to the candidate input frame. In an embodiment, the metric may be the auto-exposure data associated with the candidate input frame.

Abstract translation: 一种用于确定从具有高视觉吸引力的视频序列中选择帧的方法，并且当编码视频的帧速率下降到移动视频的感知感觉丢失的低级别时，可以以高质量编码的方法。 从候选输入帧导出度量，并且使用这种度量来确定是否增加或减少符合候选输入帧的权重。 在一个实施例中，度量可以是与候选输入帧相关联的自动曝光数据。

公开(公告)号：WO2013112814A1

公开(公告)日：2013-08-01

申请号：PCT/US2013/023118

申请日：2013-01-25

Applicant: APPLE INC.

Inventor： PRICE, Douglas, Scott ,  WU, Hsi-Jung ,  ZHOU, Xiaosong ,  ZHANG, Dazhong

IPC: H04N7/26

CPC classification number: H04N19/20 ,  H04N19/115 ,  H04N19/124 ,  H04N19/137 ,  H04N19/176

Abstract: Embodiments of the present invention provide techniques for coding video data efficiently based on detection of objects within video sequences. A video coder may perform object detection on the frame and when an object is detected, develop statistics of an area of the frame in which the object is located. The video coder may compare pixels adjacent to the object location to the object's statistics and may define an object region to include pixel blocks corresponding to the object's location and pixel blocks corresponding to adjacent pixels having similar statistics as the detected object. The coder may code the video frame according to a block-based compression algorithm wherein pixel blocks of the object region are coded according to coding parameters generating relatively high quality coding and pixel blocks outside the object region are coded according to coding parameters generating relatively lower quality coding.

Abstract translation: 本发明的实施例提供了基于视频序列内的对象的检测来有效地对视频数据进行编码的技术。 视频编码器可以在帧上执行对象检测，并且当检测到对象时，开发对象所在的帧的区域的统计。 视频编码器可以将与物体位置相邻的像素与对象的统计信息进行比较，并且可以定义对象区域以包括对应于对象的位置的像素块和对应于具有与检测对象相似的统计信息的相邻像素的像素块。 编码器可以根据基于块的压缩算法对视频帧进行编码，其中根据产生相对较高质量编码的编码参数对目标区域的像素块进行编码，并且根据产生相对较低质量的编码参数来编码对象区域外的像素块 编码。

公开(公告)号：WO2012094290A1

公开(公告)日：2012-07-12

申请号：PCT/US2012/020037

申请日：2012-01-03

Applicant: APPLE INC. ,  ZHANG, Ke ,  ZHANG, Dazhong ,  PRICE, Douglas, Scott ,  WU, Hsi-Jung ,  ZHOU, Xiaosong

Inventor： ZHANG, Ke ,  ZHANG, Dazhong ,  PRICE, Douglas, Scott ,  WU, Hsi-Jung ,  ZHOU, Xiaosong

IPC: H04N11/02

CPC classification number: H04N7/26 ,  H04N19/23 ,  H04N19/58

Abstract: A video coding/decoding system builds implied reference frames from a plurality of reference frames developed during coding. Coded data of reference pictures are decoded and stored in a reference picture cache. An implied reference frame may be derived from a plurality of reference frames and may be stored in the reference picture cache. Thereafter, coding of new input data may proceed using the implied reference frame as a source of prediction. The method may be used to identify visual elements such as background elements that may persist in video over a longer period that can be captured by the system under conventional reference frames assembly and eviction. Implied reference frames may be built at both an encoder and a decoder to serve as sources of prediction.

Abstract translation: 视频编码/解码系统从编码期间开发的多个参考帧构建隐含的参考帧。 参考图像的编码数据被解码并存储在参考图像缓存中。 可以从多个参考帧导出隐含的参考帧，并且可以将其存储在参考图像高速缓存中。 此后，可以使用隐含参考帧作为预测源来进行新输入数据的编码。 该方法可以用于识别视觉元素，例如可以在可在常规参考帧组装和驱逐下由系统捕获的较长时间段内持续存在视频的背景元素。 可以在编码器和解码器两者构建隐含的参考帧以用作预测的源。