公开(公告)号：US09621885B2

公开(公告)日：2017-04-11

申请号：US14216159

申请日：2014-03-17

Applicant: Apple Inc.

Inventor： Hsi-Jung Wu ,  Ionut Hristodorescu ,  James Oliver Normile

IPC: H04N19/513 ,  H04N19/436 ,  H04N19/176 ,  H04N19/61 ,  H04N19/103 ,  H04N19/156 ,  H04N19/44 ,  H04N19/42 ,  H04N19/88

CPC classification number: H04N19/436 ,  H04N19/103 ,  H04N19/156 ,  H04N19/176 ,  H04N19/42 ,  H04N19/44 ,  H04N19/61 ,  H04N19/88

Abstract: A method and system are provided for decoding coded video data by turning off or not loading at least one functional unit or functional subunit of the decoder while decoding a portion of the coded video data. A schedule may be created prior to substantive decoding and then the schedule may be used to decode coded video data. The coded video data may be reordered based on the functional units or subunits the portions of the coded video data need for decoding. The portions of the coded video data are reordered into their original order in an output buffer after being decoded. The decoder may determine which functional units or subunits are needed for decoding based on administration information included with the coded video data. The decoder may decode portions of the coded video data in parallel.

公开(公告)号：US09432694B2

公开(公告)日：2016-08-30

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

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像。 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。

公开(公告)号：US08897580B2

公开(公告)日：2014-11-25

申请号：US13664359

申请日：2012-10-30

Applicant: Apple Inc.

Inventor： Yeping Su ,  Jiefu Zhai ,  James Oliver Normile ,  Hsi-Jung Wu ,  Hao Pan

IPC: G06K9/36

CPC classification number: G09G3/2048 ,  G09G3/2066 ,  G09G2340/06 ,  G09G2350/00

Abstract: YCbCr image data may be dithered and converted into RGB data shown on a 8-bit or other bit display. Dither methods and image processors are provided which generate the banding artifact free image data during this process. Some methods and image processors may applying a stronger dither having a same mean with a larger variance to the image data before it is converted to RGB data. Others methods and image processors may calculate a quantization or encoding error and diffuse the calculated error among one or more neighboring pixel blocks.

Abstract translation: YCbCr图像数据可以抖动并转换成8位或其他位显示器上显示的RGB数据。 提供抖动方法和图像处理器，其在该处理期间产生无带纹带图像数据。 一些方法和图像处理器可以在将图像数据转换成RGB数据之前，对图像数据应用具有相同平均值的较强抖动。 其他方法和图像处理器可以计算量化或编码误差并且在一个或多个相邻像素块之间扩展所计算的误差。

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。