公开(公告)号：US08902986B2

公开(公告)日：2014-12-02

申请号：US13949808

申请日：2013-07-24

Applicant: Apple Inc.

Inventor： Adriana Dumitras ,  Barin G. Haskell

IPC: H04N9/64 ,  H04N19/527 ,  H04N5/14 ,  H04N19/142 ,  H04N19/139 ,  H04N19/61 ,  H04N19/543 ,  H04N19/102

CPC classification number: H04N5/147 ,  H04N5/144 ,  H04N5/145 ,  H04N19/102 ,  H04N19/137 ,  H04N19/139 ,  H04N19/142 ,  H04N19/182 ,  H04N19/527 ,  H04N19/543 ,  H04N19/61

Abstract: A look-ahead system and method for pan and zoom detection in video sequences is disclosed. The system and method use motion vectors in a reference coordinate system to identify pans and zooms in video sequences. The identification of pans and zooms enables parameter switching for improved encoding in various video standards (e.g., H.264) and improved video retrieval of documentary movies and other video sequences in video databases or other storage devices.

Abstract translation: 公开了一种用于视频序列中的平移和缩放检测的前瞻系统和方法。 系统和方法使用参考坐标系中的运动矢量来识别视频序列中的平移和缩放。 平底锅和缩放的识别使得能够在各种视频标准（例如，H.264）中改进编码的参数切换以及视频数据库或其他存储设备中的纪录片和其他视频序列的改进的视频检索。

公开(公告)号：US20160073128A1

公开(公告)日：2016-03-10

申请号：US14929145

申请日：2015-10-30

Applicant: APPLE INC.

Inventor： Barin Geoffry Haskell ,  David William Singer ,  Adriana Dumitras ,  Atul Puri

IPC: H04N19/513 ,  H04N19/91 ,  H04N19/61 ,  H04N19/46 ,  H04N19/577 ,  H04N19/587

CPC classification number: H04N19/513 ,  G06T9/005 ,  H04N19/13 ,  H04N19/132 ,  H04N19/176 ,  H04N19/40 ,  H04N19/43 ,  H04N19/44 ,  H04N19/46 ,  H04N19/503 ,  H04N19/51 ,  H04N19/577 ,  H04N19/587 ,  H04N19/61 ,  H04N19/91 ,  H04N21/4305

Abstract: A method and apparatus for variable accuracy inter-picture timing specification for digital video encoding is disclosed. Specifically, the present invention discloses a system that allows the relative timing of nearby video pictures to be encoded in a very efficient manner. In one embodiment, the display time difference between a current video picture and a nearby video picture is determined. The display time difference is then encoded into a digital representation of the video picture. In a preferred embodiment, the nearby video picture is the most recently transmitted stored picture. For coding efficiency, the display time difference may be encoded using a variable length coding system or arithmetic coding. In an alternate embodiment, the display time difference is encoded as a power of two to reduce the number of bits transmitted.