公开(公告)号：US20130329781A1

公开(公告)日：2013-12-12

申请号：US13631605

申请日：2012-09-28

Applicant: APPLE INC.

Inventor： Yeping Su ,  Hsi-Jung Wu ,  Hao Pan ,  Ke Zhang

IPC: H04N7/26

CPC classification number: H04N19/10 ,  H04N21/23424 ,  H04N21/23439 ,  H04N21/242 ,  H04N21/8456

Abstract: A vide coding server may code a common video sequence into a plurality of coded data streams, each coded data stream representing the video sequence coded using coding parameters tailored for a respective transmission bit rate. The coding may cause a set of transmission units from among the coded data streams to include coded video data from a common point of the video sequence, and a first coded frame of each transmission unit of the set to be a synchronization frame. A manifest file may be built representing an index of transmission units of the respective coded data streams. The coded data streams and manifest file may be stored by the server for delivery to a client device. During download and decode, the chunks may be decoded efficiently even when switching among streams because the first frame in each chunk is a synchronization frame.

Abstract translation: 视频编码服务器可以将公共视频序列编码为多个编码数据流，每个编码数据流表示使用针对相应传输比特率定制的编码参数进行编码的视频序列。 编码可以使得编码数据流中的一组传输单元包括来自视频序列的公共点的编码视频数据和作为同步帧的组的每个传输单元的第一编码帧。 可以构建表示相应编码数据流的传输单元的索引的清单文件。 编码数据流和清单文件可以由服务器存储以传送到客户端设备。 在下载和解码期间，即使在每个块中的第一帧是同步帧时，即使切换流之间也可以有效地解码该块。

公开(公告)号：US20130235942A1

公开(公告)日：2013-09-12

申请号：US13631428

申请日：2012-09-28

Applicant: APPLE INC.

Inventor： Yeping Su ,  Hao Pan ,  Ke Zhang ,  Douglas Scott Price ,  James Oliver Normile ,  Hsi-Jung Wu

IPC: H04N7/26

CPC classification number: H04N19/577 ,  H04N19/107 ,  H04N19/117 ,  H04N19/124 ,  H04N19/139 ,  H04N19/149 ,  H04N19/15 ,  H04N19/154 ,  H04N19/156 ,  H04N19/172 ,  H04N19/192 ,  H04N19/46 ,  H04N19/58

Abstract: Video coding systems and methods protect against banding artifacts in decoded image content. According to the method, a video coder may identify, from content of pixel blocks of a frame of video data, which pixel blocks are likely to exhibit banding artifacts from the video coding/decoding processes. The video coder may assemble regions of the frame that are likely to exhibit banding artifacts based on the identified pixel blocks' locations with respect to each other. The video coder may apply anti-banding processing to pixel blocks within one or more of the identified regions and, thereafter, may code the processed frame by a compression operation.

Abstract translation: 视频编码系统和方法保护解码图像内容中的带状伪像。 根据该方法，视频编码器可以根据视频数据帧的像素块的内容从视频编码/解码处理中识别哪些像素块可能呈现带状伪影。 视频编码器可以基于所识别的像素块相对于彼此的位置来组合可能呈现带状伪影的帧的区域。 视频编码器可以对所识别的一个或多个区域内的像素块应用反绑带处理，然后可以通过压缩操作来对经处理的帧进行编码。