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    MULTIDIMENSIONAL QUANTIZATION TECHNIQUES FOR VIDEO CODING/DECODING SYSTEMS
    151.
    发明申请
    MULTIDIMENSIONAL QUANTIZATION TECHNIQUES FOR VIDEO CODING/DECODING SYSTEMS 审中-公开

    公开(公告)号：US20180063544A1

    公开(公告)日：2018-03-01

    申请号：US15250608

    申请日：2016-08-29

    Applicant: Apple Inc.

    Inventor： Alexandros Tourapis ,  Yeping Su ,  David Singer ,  Hsi-Jung Wu

    IPC: H04N19/50 ,  H04N19/124 ,  H04N19/48 ,  H04N19/13 ,  H04N19/15 ,  H04N19/42 ,  H04N19/30

    Abstract: Video compression and decompression techniques are disclosed that provide improved bandwidth control for video compression and decompression systems. In particular, video coding and decoding techniques quantize input video in multiple dimensions. According to these techniques, pixel residuals may be generated from a comparison of an array of input data to an array of prediction data. The pixel residuals may be quantized in a first dimension. After the quantization, the quantized pixel residuals may be transformed to an array of transform coefficients. The transform coefficients may be quantized in a second dimension and entropy coded. Decoding techniques invert these processes. In still other embodiments, multiple quantizers may be provided upstream of the transform stage, either in parallel or in cascade, which provide greater flexibility to video coders to quantize data in different dimensions in an effort to balance the competing interest in compression efficiency and quality of reconstructed video.

    TECHNIQUES FOR ADVANCED CHROMA PROCESSING
    154.
    发明申请
    TECHNIQUES FOR ADVANCED CHROMA PROCESSING 有权
    高级色谱加工技术

    公开(公告)号：US20160309059A1

    公开(公告)日：2016-10-20

    申请号：US14875432

    申请日：2015-10-05

    Applicant: Apple Inc.

    Inventor： Alexandros Michael Tourapis ,  Yeping Su ,  David William Singer ,  Hsi-Jung Wu

    IPC: H04N1/60

    CPC classification number: H04N1/6005 ,  H04N1/6058 ,  H04N9/67 ,  H04N19/186 ,  H04N19/46 ,  H04N19/85

    Abstract: Image and video processing techniques are disclosed for processing components of a color space individually by determining limits for each component based on the relationship between each component in a color space. These limits may then be used to clip each component such that the component values are within the determined range for that component. In this manner, more efficient processing of images and/or video may be achieved.

    Abstract translation: 公开了图像和视频处理技术，用于通过基于颜色空间中的每个组件之间的关系确定每个组件的限制来单独地处理颜色空间的组件。 然后可以使用这些限制来剪切每个组件，使得组件值在该组件的确定的范围内。 以这种方式，可以实现图像和/或视频的更有效的处理。

    VIDEO ENCODING OPTIMIZATION OF EXTENDED SPACES INCLUDING LAST STAGE PROCESSES
    155.
    发明申请
    VIDEO ENCODING OPTIMIZATION OF EXTENDED SPACES INCLUDING LAST STAGE PROCESSES 审中-公开
    视频编码扩展空间的最优化，包括最后阶段过程

    公开(公告)号：US20160269739A1

    公开(公告)日：2016-09-15

    申请号：US15067041

    申请日：2016-03-10

    Applicant: Apple Inc.

    Inventor： Alexandros Michael Tourapis ,  Yeping Su ,  David William Singer ,  Hsi-Jung Wu

    IPC: H04N19/517 ,  H04N19/40 ,  H04N19/152 ,  H04N19/117 ,  H04N19/147 ,  H04N19/86 ,  H04N19/44

    CPC classification number: H04N19/517 ,  H04N19/117 ,  H04N19/132 ,  H04N19/147 ,  H04N19/152 ,  H04N19/182 ,  H04N19/186 ,  H04N19/40 ,  H04N19/44 ,  H04N19/59 ,  H04N19/70 ,  H04N19/82 ,  H04N19/86

    Abstract: A video coding system may include an encoder performs motion-compensated prediction on a video signal in a second format converted from an input format of the video signal. The video coding system may also include a decoder to decode portions of the encoded video, and a filtering system that filters portions of the decoded video, for example, by deblocking filtering or SAO filtering, using parameters derived from the video signal in the input format. A prediction system may include another format converter that converts the decoded video to the input format. The prediction system may select parameters of the motion-compensated prediction based at least in part on a comparison of the video signal in the input format to decoded video in the input format.

    Abstract translation: 视频编码系统可以包括编码器以视频信号的输入格式转换的第二格式的视频信号执行运动补偿预测。 视频编码系统还可以包括解码器，用于对编码视频的部分进行解码;以及滤波系统，其使用从输入格式的视频信号导出的参数，例如通过解块滤波或SAO滤波来对部分解码视频进行滤波 。 预测系统可以包括将解码的视频转换为输入格式的另一格式转换器。 所述预测系统可以至少部分地基于输入格式的视频信号与输入格式的解码视频的比较来选择运动补偿预测的参数。

    DE-JUDDERING TECHNIQUES FOR CODED VIDEO
    157.
    发明申请
    DE-JUDDERING TECHNIQUES FOR CODED VIDEO 审中-公开
    编码视频的裁判技术

    公开(公告)号：US20160182911A1

    公开(公告)日：2016-06-23

    申请号：US14964965

    申请日：2015-12-10

    Applicant: Apple Inc.

    Inventor： Yeping Su ,  Chris Y. Chung ,  Hsi-Jung Wu ,  Xiaosong Zhou ,  Jiefu Zhai

    IPC: H04N19/154 ,  H04N19/137 ,  H04N19/187 ,  H04N19/177 ,  H04N19/70 ,  H04N19/36 ,  H04N19/46 ,  H04N7/01 ,  H04N7/00 ,  H04N19/85 ,  H04N19/115 ,  H04N19/33

    CPC classification number: H04N19/154 ,  H04N7/0127 ,  H04N19/115 ,  H04N19/117 ,  H04N19/137 ,  H04N19/177 ,  H04N19/187 ,  H04N19/31 ,  H04N19/46 ,  H04N19/587 ,  H04N19/85

    Abstract: Judder artifacts are remedied in video coding system by employing frame rate conversion at an encoder. According to the disclosure, a source video sequence may be coded as base layer coded video at a first frame rate. An encoder may identify a portion of the coded video sequence that likely will exhibit judder effects when decoded. For those portions that likely will exhibit judder effects, video data representing the portion of the source video may be coded at a higher frame rate than a frame rate of the coded base layer data as enhancement layer data. Moreover, an encoder may generate metadata representing “FRC hints”—techniques that a decoder should employ when performing decoder-side frame rate conversion. An encoding terminal may transmit the base layer coded video and either the enhancement layer coded video or the FRC hints to a decoder. Thus, encoder infrastructure may mitigate against judder artifacts that may arise during decoding.

    Abstract translation: 通过在编码器处采用帧速率转换，在视频编码系统中纠正了歪曲伪像。 根据本公开，源视频序列可以以第一帧速率被编码为基本层编码的视频。 编码器可以识别编码视频序列的一部分，其在解码时可能会呈现抖动效应。 对于可能出现抖动效应的那些部分，可以以比作为增强层数据的编码的基本层数据的帧速率更高的帧速率对表示源视频的部分的视频数据进行编码。 此外，编码器可以产生表示“FRC提示”的元数据，技术在解码器侧帧速率转换时解码器应采用的技术。 编码终端可以将基础层编码视频和增强层编码视频或FRC提示发送到解码器。 因此，编码器基础设施可以减轻在解码期间可能出现的抖动伪影。

    TECHNIQUES IN BACKWARDS COMPATIBLE MULTI-LAYER COMPRESSION OF HDR VIDEO
    158.
    发明申请
    TECHNIQUES IN BACKWARDS COMPATIBLE MULTI-LAYER COMPRESSION OF HDR VIDEO 有权
    背景技术兼容HDR视频的多层压缩

    公开(公告)号：US20160127738A1

    公开(公告)日：2016-05-05

    申请号：US14704707

    申请日：2015-05-05

    Applicant: Apple Inc.

    Inventor： Yeping Su ,  Chris Y. Chung ,  Hsi-Jung Wu ,  Jiefu Zhai ,  Ke Zhang ,  Xiaosong Zhou

    IPC: H04N19/503 ,  H04N19/172 ,  H04N19/124

    CPC classification number: H04N19/503 ,  H04N19/124 ,  H04N19/147 ,  H04N19/172 ,  H04N19/30

    Abstract: A scalable coding system codes video as a base layer representation and an enhancement layer representation. A base layer coder may code an LDR representation of a source video. A predictor may predict an HDR representation of the source video from the coded base layer data. A comparator may generate prediction residuals which represent a difference between an HDR representation of the source video and the predicted HDR representation of the source video. A quantizer may quantize the residuals down to an LDR representation. An enhancement layer coder may code the LDR residuals. In other embodiments, the enhancement layer coder may code LDR-converted HDR video directly.

    Abstract translation: 可扩展编码系统将视频编码为基本层表示和增强层表示。 基本层编码器可以对源视频的LDR表示进行编码。 预测器可以从编码的基础层数据预测源视频的HDR表示。 比较器可以产生表示源视频的HDR表示与源视频的预测HDR表示之间的差异的预测残差。 量化器可以将残差量化到LDR表示。 增强层编码器可以对LDR残差进行编码。 在其他实施例中，增强层编码器可以直接编码LDR转换的HDR视频。

    TECHNIQUES FOR HDR/WCR VIDEO CODING
    159.
    发明申请
    TECHNIQUES FOR HDR/WCR VIDEO CODING 审中-公开
    HDR / WCR视频编码技术

    公开(公告)号：US20150326896A1

    公开(公告)日：2015-11-12

    申请号：US14710520

    申请日：2015-05-12

    Applicant: Apple Inc.

    Inventor： Yeping Su ,  Jiefu Zhai ,  Ke Zhang ,  Xiaosong Zhou ,  Hsi-Jung Wu ,  Chris Y. Chung

    IPC: H04N21/2343 ,  H04N21/2385 ,  H04N21/438 ,  H04N19/184 ,  H04N21/4402 ,  H04N19/50 ,  H04N19/186 ,  H04N21/234 ,  H04N21/44

    CPC classification number: H04N19/30 ,  H04N19/46

    Abstract: Systems and methods are provided for processing high quality video data, such as data having a higher than standard bit depth, a high dynamic range, or a wide or custom color gamut, to be compatible with conventional encoders and decoders without significant loss of quality. High quality data is encoded into a plurality of layers with a base layer having the standard quality data and one or more higher quality layers. Decoding systems and methods may map the base layer to the dynamic range or color gamut of the enhancement layer, combine the layers, and map the combined layers to a dynamic range or color gamut appropriate for the target display. Each of the standard quality and the high quality data may be encoded as a plurality of tiers of increasing quality and reference lower level tiers as sources of prediction during predictive coding.

    Abstract translation: 提供了用于处理高质量视频数据的系统和方法，例如具有高于标准位深度，高动态范围或宽或定制色域的数据，以与常规编码器和解码器兼容，而没有显着的质量损失。 高质量数据被编码成具有基层的多层，具有标准质量数据和一个或多个更高质量的层。 解码系统和方法可以将基本层映射到增强层的动态范围或色域，组合层，并将组合层映射到适合于目标显示的动态范围或色域。 标准质量和高质量数据中的每一个可以被编码为增加质量的多个层级和作为预测编码期间的预测源的较低级别的参考。

    Error diffusion with color conversion and encoding
    160.
    发明授权
    Error diffusion with color conversion and encoding 有权
    错误扩散与颜色转换和编码

    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。

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