公开(公告)号：WO2018135291A1

公开(公告)日：2018-07-26

申请号：PCT/JP2017/047179

申请日：2017-12-28

Applicant: SONY CORPORATION

Inventor： KIKUCHI, Hiroaki ,  ONUKI, Jun ,  HIROSE, Masaki

IPC: G06T5/00 ,  H04N9/68 ,  H04N5/235 ,  H04N19/98 ,  H04N5/202 ,  H04N9/69

Abstract: There is provided a video signal processing apparatus, including: a first interface configured to obtain a first video signal imaged within a first dynamic range; a second interface configured to obtain information for specifying a partial area of the obtained first video signal; and an arithmetic processing circuit configured to calculate a representative value of brightness of the first video signal of the partial area, to compress a dynamic range of the first video signal depending on the calculated representative value, and to generate a second video signal, a dynamic range of the second video signal being restricted to a second dynamic range narrower than the first dynamic range.

公开(公告)号：WO2018127629A1

公开(公告)日：2018-07-12

申请号：PCT/FI2018/050008

申请日：2018-01-04

Applicant: NOKIA TECHNOLOGIES OY

Inventor： PESONEN, Mika ,  RAJALA, Johannes

IPC: H04N13/128 ,  H04N13/161 ,  H04N13/178 ,  H04N19/156 ,  H04N19/176 ,  H04N19/597 ,  H04N19/98 ,  H04N13/268 ,  H04N13/271 ,  H04N21/235 ,  H04N21/236 ,  H04N21/43 ,  H04N21/845 ,  G06T7/593

CPC classification number: H04N19/597 ,  H04N13/161 ,  H04N19/169 ,  H04N19/176 ,  H04N19/90

Abstract: A method for encoding at least one depth image frame within a sequence of depth image frames, the method comprising: segmenting each at least one depth image frame into an array of depth image blocks;determining for each depth image block a minimum depth image value and a maximum depth image value;generating a maximum depth image from the determined maximum depth image values;generating a minimum depth image from the determined minimum depth image values; and encoding values of the at least one depth image frame based on values of the maximum depth image and values of the minimum depth image at corresponding positions.

公开(公告)号：WO2018049335A1

公开(公告)日：2018-03-15

申请号：PCT/US2017/050980

申请日：2017-09-11

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： KADU, Harshad ,  CHEN, Qian ,  SU, Guan-Ming

IPC: H04N19/117 ,  H04N19/124 ,  H04N19/136 ,  H04N19/182 ,  H04N19/177 ,  H04N19/98

Abstract: Given HDR and SDR video inputs representing the same content, segment-based methods are described to generate a backward-compatible reshaped SDR video which preserves the artistic intent or "look" of the inputs and satisfies other coding requirements. For each frame in a segment, reshaping functions are generated based on a support frames set determined based on a sliding window of frames that is adjusted based on scene cuts in the segment and which may include frames from both the current segment and neighboring segments. For luma reshaping, a mapping that preserves the cumulative density function of the luminance histogram values in the EDR and SDR inputs is combined with a minimum codeword allocation derived based on the EDR signal and the support frame set. For chroma reshaping, methods for segment-based forward and backward reshaping using multivariate, multi-regression models are also presented.

Abstract translation: 给定表示相同内容的HDR和SDR视频输入，描述基于片段的方法以生成向后兼容的重新塑造的SDR视频，其保留艺术意图或“外观”。 的输入并满足其他编码要求。 对于片段中的每个帧，基于基于根据片段中的场景片段调整并且可以包括来自当前片段和邻近片段的帧的帧的滑动窗口确定的支持帧集合来生成重整形函数。 对于亮度整形，保存EDR和SDR输入中的亮度直方图值的累积密度函数的映射与基于EDR信号和支持帧集合导出的最小码字分配相结合。 对于色度重塑，还提出了使用多元多回归模型进行基于片段的前向和后向重塑的方法。

公开(公告)号：WO2017201139A1

公开(公告)日：2017-11-23

申请号：PCT/US2017/033056

申请日：2017-05-17

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： SONG, Qing ,  SU, Guan-Ming ,  CHEN, Qian ,  CHEN, Tao

IPC: H04N19/30 ,  H04N19/124 ,  H04N19/85 ,  H04N19/98

CPC classification number: H04N19/30 ,  H04N19/124 ,  H04N19/85 ,  H04N19/98

Abstract: Methods and systems for adaptive chroma reshaping are discussed. Given an input image, a luma-reshaped image is first generated based on its luma component. For each chroma component of the input image, the range of the pixel values in the luma reshaped image is divided into bins, and for each bin a maximal scale factor is generated based on the chroma pixel values in the input image corresponding to the pixels of the luma reshaped image in the bin. A forward reshaping function is generated based on a reference reshaped function and the maximal scale factors, and reshaped chroma pixel values for the chroma component are generated based on the forward reshaping function and the corresponding pixel values in the luma reshaped image. Implementations options using look-up tables for mobile platforms with limited computational resources are also described.

Abstract translation: 讨论了用于自适应色度再整形的方法和系统。 给定输入图像，首先根据亮度分量生成亮度重新变形的图像。 对于输入图像的每个色度分量，将亮度重新变形图像中的像素值的范围划分为区间，并且对于每个区间，基于输入图像中对应于像素的色度像素值生成最大比例因子 亮度在bin中重新塑造图像。 基于参考整形函数和最大比例因子来生成正向整形函数，并且基于正向整形函数和亮度整形图像中的对应像素值来生成色度分量的整形色度像素值。

公开(公告)号：WO2017196670A1

公开(公告)日：2017-11-16

申请号：PCT/US2017/031335

申请日：2017-05-05

Applicant: VID SCALE, INC.

Inventor： RAMASWAMY, Kumar ,  COOPER, Jeffrey Allen

IPC: H04N21/2343 ,  H04N21/258 ,  H04N21/643 ,  H04N21/845 ,  H04N21/854 ,  H04N19/102 ,  H04N19/16 ,  H04N19/179 ,  H04N19/98

CPC classification number: G06K9/3233 ,  G06T5/009 ,  G06T5/40 ,  H04N19/102 ,  H04N19/16 ,  H04N19/17 ,  H04N19/179 ,  H04N19/98 ,  H04N21/23439 ,  H04N21/25825 ,  H04N21/64322 ,  H04N21/8456 ,  H04N21/85406

Abstract: Systems and methods are described for enabling a client device to request video streams with different bit depth remappings for different viewing conditions. In an embodiment, information indicating the availability of additional remapped profiles is sent in a manifest file. Alternative bit-depth remappings may be optimized for different regions of interest in the image or video content, or for different viewing conditions, such as different display technologies and different ambient illumination. Some embodiments based on the DASH protocol perform multiple depth mappings at the encoder and also perform ABR-encoding for distribution. The manifest file contains information indicating additional remapping profiles. The remapping profiles are associated with different transformation functions used to convert from a higher bit-depth to a lower bit-depth.

Abstract translation: 描述了用于使客户端设备能够针对不同观看条件请求具有不同比特深度重新映射的视频流的系统和方法。 在一个实施例中，指示附加重映射配置文件的可用性的信息在清单文件中发送。 可以针对图像或视频内容中的不同感兴趣区域或者针对不同观看条件（诸如不同的显示技术和不同的环境照明）优化可选的位深度重新映射。 基于DASH协议的一些实施例在编码器处执行多个深度映射并且还执行用于分布的ABR编码。 清单文件包含指示附加重新映射配置文件的信息。 重新映射配置文件与用于从较高比特深度转换为较低比特深度的不同转换函数相关联。

公开(公告)号：WO2017053846A1

公开(公告)日：2017-03-30

申请号：PCT/US2016/053511

申请日：2016-09-23

Applicant: ARRIS ENTERPRISES LLC

Inventor： BAYLON, David M. ,  GU, Zhouye ,  LUTHRA, Ajay ,  MINOO, Koohyar ,  YU, Yue

IPC: H04N19/98 ,  H04N19/70 ,  G06T5/00

CPC classification number: H04N19/124 ,  G06T5/007 ,  G06T2207/20208 ,  H04N19/174 ,  H04N19/177 ,  H04N19/186 ,  H04N19/44 ,  H04N19/70 ,  H04N19/98

Abstract: A system and method for regenerating high dynamic range (HDR) video data from encoded video data, extracts, from the encoded video data, a self-referential metadata structure specifying a video data reshaping transfer function. The video data reshaping transfer function is regenerated using data from the metadata structure and the extracted reshaping transfer function is used to generate the HDR video data by applying decoded video data values to the reshaping transfer function.

Abstract translation: 从编码视频数据再生高动态范围（HDR）视频数据的系统和方法，从编码视频数据中提取指定重构传输函数的视频数据的自参照元数据结构。 使用来自元数据结构的数据再现视频数据重新转换功能，并且通过将解码的视频数据值应用于重塑传递函数，并且提取的重塑传递函数用于生成HDR视频数据。

公开(公告)号：WO2016120261A1

公开(公告)日：2016-08-04

申请号：PCT/EP2016/051552

申请日：2016-01-26

Applicant: THOMSON LICENSING

Inventor： REINHARD, Erik ,  ANDRIVON, Pierre ,  BORDES, Philippe ,  FRANCOIS, Edouard ,  ZEPEDA SALVATIERRA, Joaquin ,  CHEVANCE, Christophe ,  STAUDER, Jürgen ,  MORVAN, Patrick

IPC: H04N19/70 ,  H04N19/85 ,  H04N19/98

CPC classification number: H04N19/98 ,  G09G2320/0271 ,  G09G2320/0276 ,  G09G2370/04 ,  G09G2370/12 ,  H04N19/186 ,  H04N19/70 ,  H04N19/85

Abstract: The present principles are directed to a parameterized OETF/EOTF for processing images and video. The present principles provide a method for encoding a picture, comprising: applying a parameterized transfer function to a luminance (L) signal of the picture to determine a resulting V(L) transformed signal; encoding the resulting V(L); wherein the parameterized transfer function is adjusted based on a plurality of parameters to model one of a plurality of transfer functions. The present principles also provide for a method for decoding a digital picture, the method comprising: receiving the digital picture; applying a parameterized transfer function to the digital picture to determine a luminance (L) signal of the digital picture, the parameterized transfer function being based on a plurality of parameters; wherein the parameterized transfer function is adjusted based on a plurality of parameters to model one of a plurality of transfer functions.

Abstract translation: 本原理涉及用于处理图像和视频的参数化OETF / EOTF。 本原理提供了一种用于编码图像的方法，包括：将参数化传递函数应用于图像的亮度（L）信号，以确定所得到的V（L）变换信号; 对所得到的V（L）进行编码; 其中基于多个参数来调整所述参数化传递函数以对多个传递函数中的一个进行建模。 本原理还提供了一种用于对数字图像进行解码的方法，该方法包括：接收数字图像; 将参数化传递函数应用于数字图像以确定数字图像的亮度（L）信号，参数化传递函数基于多个参数; 其中基于多个参数来调整所述参数化传递函数以对多个传递函数中的一个进行建模。

公开(公告)号：WO2016120208A1

公开(公告)日：2016-08-04

申请号：PCT/EP2016/051448

申请日：2016-01-25

Applicant: THOMSON LICENSING

Inventor： LASSERRE, Sebastien ,  LELEANNEC, Fabrice ,  BORDES, Philippe

IPC: H04N19/98 ,  H04N19/36 ,  H04N19/117 ,  H04N19/136 ,  H04N19/186 ,  H04N19/80

CPC classification number: H04N19/36 ,  H04N19/117 ,  H04N19/136 ,  H04N19/186 ,  H04N19/44 ,  H04N19/80

Abstract: The present disclosure generally relates to a method and device of encoding a color picture having color components (Ec), characterized in that it comprises: - obtaining (130) a luminance component (L) comprising: - obtaining (120) a modulation value (Ba) from the luminance (Y) of the color picture; - obtaining a scaled luminance by dividing the luminance (Y) of the color picture by said modulation value (Ba); - obtaining the luminance component (L) by applying a non-linear function on said scaled luminance in order that the dynamic of said luminance component (L) is reduced compared to the dynamic of said scaled luminance; - obtaining two chrominance components (C1, C2) comprising: - obtaining a factor (r(L(i)) that depends on the value of the pixel (i) of said luminance component (L(i)) and the luminance value (Y(i)) of the co-located pixel (i) in the color picture; - obtaining (150) at least one intermediate color component (E'c) by multiplying each color component (Ec) by said factor (r(L(i)); and - obtaining (170) said two chrominance components (C1, C2) from said at least one intermediate color components (E'c); and - encoding (180) said luminance (L) and two chrominance components (C1, C2).

Abstract translation: 本公开总体上涉及对具有颜色分量（Ec）的彩色图像进行编码的方法和装置，其特征在于，其包括： - 获得（130）亮度分量（L），包括：获得（120）调制值 Ba）从彩色图像的亮度（Y） - 通过将彩色图像的亮度（Y）除以所述调制值（Ba）来获得缩放亮度; - 通过对所述缩放亮度施加非线性函数来获得亮度分量（L），以便与所述缩放亮度的动态相比，所述亮度分量（L）的动态减小; - 获得两个色度分量（C1，C2），包括： - 获得取决于所述亮度分量（L（i））的像素（i）的值和亮度值（ （i））; - 通过将每个颜色分量（Ec）乘以所述因子（r（L））来获得（150）至少一个中间颜色分量（E'c） （i））;以及 - 从所述至少一个中间颜色分量（E'c）获得（170）所述两个色度分量（C1，C2）;以及 - 编码（180）所述亮度（L）和两个色度分量 C1，C2）。

公开(公告)号：WO2016017058A1

公开(公告)日：2016-02-04

申请号：PCT/JP2015/002945

申请日：2015-06-11

Applicant: SONY CORPORATION

Inventor： ETO, Hiroaki ,  HAMADA, Toshiya ,  HATTORI, Shinobu ,  KANAI, Kenichi ,  TSURU, Takumi ,  SHIRAISHI, Tomizo ,  NAKATSUE, Takehiro

IPC: G09G5/00 ,  G06F3/14 ,  H04N19/98

CPC classification number: G06T5/009 ,  G06F3/14 ,  G06T2207/20208 ,  G09G5/00 ,  G09G5/02 ,  G09G5/10 ,  G09G2320/0271 ,  G09G2320/0276 ,  G09G2360/16 ,  G09G2370/025 ,  H04N19/46 ,  H04N19/98

Abstract: Provided is an image processing apparatus and an image processing method. The image processing apparatus includes circuitry configured to receive image data, and receive metadata set based on the image data. The metadata including information serving as a display mapping reference to maintain a characteristic of the image data to a portion of the image data.

Abstract translation: 提供了一种图像处理装置和图像处理方法。 图像处理装置包括被配置为接收图像数据并基于图像数据接收元数据集的电路。 元数据包括用作显示映射参考的信息，以将图像数据的特性保持为图像数据的一部分。

公开(公告)号：WO2015183958A1

公开(公告)日：2015-12-03

申请号：PCT/US2015/032678

申请日：2015-05-27

Applicant: APPLE INC.

Inventor： ZHOU, Xiaosong ,  ZHAI, Jiefu ,  SU, Yeping ,  CHUNG, Chris, Y. ,  WU, Hsi-Jung

IPC: G06T5/00 ,  H04N19/85 ,  H04N19/98

CPC classification number: H04N19/105 ,  H04N19/119 ,  H04N19/13 ,  H04N19/159 ,  H04N19/167 ,  H04N19/176 ,  H04N19/18 ,  H04N19/85 ,  H04N19/98

Abstract: A video coding/decoding system codes data efficiently even when input video data exhibits changes in dynamic range. The system may map pixel values of the first frame from a dynamic range specific to the input image data to a second dynamic range that applies universally to a plurality of frames that have different dynamic ranges defined for them. The system may code the mapped pixel values to reduce bandwidth of the mapped frame data, and thereafter transmit the coded image data to a channel.

Abstract translation: 视频编码/解码系统即使在输入视频数据表现出动态范围的变化时，也能有效地对数据进行编码。 该系统可将来自特定于输入图像数据的动态范围的第一帧的像素值映射到通常适用于为它们定义的不同动态范围的多个帧的第二动态范围。 系统可以对映射的像素值进行编码以减少映射的帧数据的带宽，然后将编码的图像数据发送到信道。