公开(公告)号：US09712801B2

公开(公告)日：2017-07-18

申请号：US14941992

申请日：2015-11-16

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Walter J. Husak ,  David Ruhoff ,  Alexandros Tourapis ,  Athanasios Leontaris

IPC: H04N13/00 ,  H04N19/597 ,  H04N19/61 ,  H04N19/60 ,  H04N19/59 ,  H04N19/00

CPC classification number: H04N13/161 ,  H04N13/139 ,  H04N13/15 ,  H04N13/194 ,  H04N19/00 ,  H04N19/59 ,  H04N19/597 ,  H04N19/60 ,  H04N19/61

Abstract: Stereoscopic images are subsampled and placed in a “checkerboard” pattern in an image. The image is encoded in a monoscopic video format. The monoscopic video is transmitted to a device where the “checkerboard” is decoded. Portions of the checkerboard (e.g., “black” portions) are used to reconstruct one of the stereoscopic images and the other portion of the checkerboard (e.g., “white” portions) are used to reconstruct the other image. The subsamples are, for example, taken from the image in a location coincident to the checkerboard position in which the subsamples are encoded.

公开(公告)号：US09521413B2

公开(公告)日：2016-12-13

申请号：US15004582

申请日：2016-01-22

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Peshala V. Pahalawatta ,  Yuwen He ,  Alexandros Tourapis

IPC: H04N7/12 ,  H04N19/117 ,  H04N5/21 ,  H04N19/597 ,  H04N19/176 ,  H04N19/147 ,  H04N19/39 ,  H04N19/82 ,  H04N19/52

CPC classification number: H04N19/117 ,  H04N5/21 ,  H04N19/147 ,  H04N19/176 ,  H04N19/39 ,  H04N19/52 ,  H04N19/597 ,  H04N19/82

Abstract: Reference processing may be used in a video encoder or decoder to derive reference pictures that are better correlated with a source image to be encoded or decoded, which generally yields better coding efficiency. Methods for filter selection for a reference processing unit adapted for use in a video codec system are discussed. Specifically, methods for filter selection based on performing motion estimation and obtaining distortion/cost information by comparing reference pictures, either processed or non-processed, with the source image to be encoded are discussed.

公开(公告)号：US09357230B2

公开(公告)日：2016-05-31

申请号：US14723693

申请日：2015-05-28

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Alexandros Tourapis ,  Athanasios Leontaris

IPC: H04N19/583 ,  H04N19/176 ,  H04N19/577 ,  H04N19/597 ,  H04N19/139 ,  H04N19/46 ,  H04N19/30 ,  H04N19/61 ,  H04N19/103 ,  H04N19/573 ,  H04N19/513

CPC classification number: H04N19/139 ,  H04N19/103 ,  H04N19/105 ,  H04N19/152 ,  H04N19/159 ,  H04N19/176 ,  H04N19/182 ,  H04N19/184 ,  H04N19/30 ,  H04N19/46 ,  H04N19/521 ,  H04N19/573 ,  H04N19/577 ,  H04N19/583 ,  H04N19/597 ,  H04N19/61

Abstract: Overlapped block disparity estimation and compensation is described. Compensating for images with overlapped block disparity compensation (OBDC) involves determining if OBDC is enabled in a video bit stream, and determining if OBDC is enabled for one or more macroblocks that neighbor a first macroblock within the video bit stream. The neighboring macroblocks may be transform coded. If OBDC is enabled in the video bit stream and for the one or more neighboring macroblocks, predictions may be made for a region of the first macroblock that has an edge adjacent with the neighboring macroblocks. OBDC can be causally applied. Disparity compensation parameters or modes may be shared amongst views or layers. A variety of predictions may be used with causally-applied OBDC.

Abstract translation: 描述了重叠块差异估计和补偿。 补偿具有重叠块视差补偿（OBDC）的图像涉及确定在视频比特流中OBDC是否被使能，以及确定是否对与视频比特流内的第一宏块相邻的一个或多个宏块启用OBDC。 相邻宏块可以被变换编码。 如果在视频比特流和一个或多个相邻宏块中启用了OBDC，则可以对具有与相邻宏块相邻的边缘的第一宏块的区域进行预测。 OBDC可以因果地应用。 视差补偿参数或模式可以在视图或图层之间共享。 可以使用各种预测作为病因应用的OBDC。

公开(公告)号：US20140348232A1

公开(公告)日：2014-11-27

申请号：US14237348

申请日：2012-08-31

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Athanasios Leontaris ,  Yan Ye ,  Alexandros Tourapis

IPC: H04N19/61 ,  H04N19/503 ,  H04N19/593

CPC classification number: H04N19/63 ,  H04N19/186 ,  H04N19/31 ,  H04N19/33 ,  H04N19/36 ,  H04N19/37 ,  H04N19/503 ,  H04N19/593 ,  H04N19/597 ,  H04N19/61

Abstract: A video encoding and decoding system for use in a multiview and bitdepth coding system is described. Such system can comprise a plurality of layer groupings, where each group can be adapted to encode and/or decode based on predictions from previous layers and a plurality of data categories from the input video data.

Abstract translation: 描述了在多视点和位深度编码系统中使用的视频编码和解码系统。 这样的系统可以包括多个层分组，其中每个组可以适于基于来自先前层的预测和来自输入视频数据的多个数据类别进行编码和/或解码。

公开(公告)号：US20130182971A1

公开(公告)日：2013-07-18

申请号：US13736616

申请日：2013-01-08

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Athanasios Leontaris ,  Alexandros Tourapis

IPC: G06T5/00

CPC classification number: G06T5/002 ,  G06T7/0002 ,  G06T2207/10016 ,  G06T2207/20021 ,  G06T2207/30168 ,  H04N19/103 ,  H04N19/117 ,  H04N19/124 ,  H04N19/147 ,  H04N19/154 ,  H04N19/176 ,  H04N19/19 ,  H04N19/86

Abstract: Spatial and temporal metrics are computed for a picture or regions within a picture to determine the impact of coding and quantization on the quality of an encoded picture. Prediction mode decisions and quantization optimization algorithms are used to create a compressed bit stream that minimizes coding artifacts. Pre-processing techniques are also used to suppress coding artifacts that reduce picture quality.

Abstract translation: 为图片中的图片或区域计算空间和时间度量，以确定编码和量化对编码图像质量的影响。 使用预测模式决策和量化优化算法来创建最小化编码伪影的压缩比特流。 预处理技术也用于抑制降低图像质量的编码伪影。

公开(公告)号：US20130177066A1

公开(公告)日：2013-07-11

申请号：US13733056

申请日：2013-01-02

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Yan Ye ,  Alexandros Tourapis ,  Peng Yin ,  Yuwen He

IPC: H04N7/26

CPC classification number: H04N19/44 ,  H04N19/10 ,  H04N19/103 ,  H04N19/172 ,  H04N19/182 ,  H04N19/187 ,  H04N19/33 ,  H04N19/36 ,  H04N19/537 ,  H04N19/55 ,  H04N19/59

Abstract: Context based inverse mapping methods are provided. An image with pixel values within a lower dynamic range can be mapped to an image with pixel values within a higher dynamic range by utilizing context information associated with pixels in the lower dynamic range image.

Abstract translation: 提供了基于上下文的逆映射方法。 具有较低动态范围内的像素值的图像可以通过利用与较低动态范围图像中的像素相关联的上下文信息而被映射到具有更高动态范围内的像素值的图像。

公开(公告)号：US20250080749A1

公开(公告)日：2025-03-06

申请号：US18953605

申请日：2024-11-20

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Alexandros Tourapis ,  Athanasios Leontaris

IPC: H04N19/139 ,  H04N19/103 ,  H04N19/105 ,  H04N19/152 ,  H04N19/159 ,  H04N19/176 ,  H04N19/182 ,  H04N19/184 ,  H04N19/30 ,  H04N19/46 ,  H04N19/513 ,  H04N19/573 ,  H04N19/577 ,  H04N19/583 ,  H04N19/597 ,  H04N19/61

Abstract: Overlapped block disparity estimation and compensation is described. Compensating for images with overlapped block disparity compensation (OBDC) involves determining if OBDC is enabled in a video bit stream, and determining if OBDC is enabled for one or more macroblocks that neighbor a first macroblock within the video bit stream. The neighboring macroblocks may be transform coded. If OBDC is enabled in the video bit stream and for the one or more neighboring macroblocks, predictions may be made for a region of the first macroblock that has an edge adjacent with the neighboring macroblocks. OBDC can be causally applied. Disparity compensation parameters or modes may be shared amongst views or layers. A variety of predictions may be used with causally-applied OBDC.

公开(公告)号：US12041234B2

公开(公告)日：2024-07-16

申请号：US17557996

申请日：2021-12-21

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Athanasios Leontaris ,  Alexandros Tourapis

IPC: H04N19/124 ,  H04N19/126 ,  H04N19/137 ,  H04N19/14 ,  H04N19/142 ,  H04N19/149 ,  H04N19/15 ,  H04N19/152 ,  H04N19/154 ,  H04N19/159 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/194 ,  H04N19/61 ,  H04N19/615 ,  H04N19/80

CPC classification number: H04N19/124 ,  H04N19/137 ,  H04N19/14 ,  H04N19/142 ,  H04N19/15 ,  H04N19/154 ,  H04N19/159 ,  H04N19/194 ,  H04N19/615 ,  H04N19/80 ,  H04N19/126 ,  H04N19/149 ,  H04N19/152 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/61

Abstract: Embodiments feature families of rate allocation and rate control methods that utilize advanced processing of past and future frame/field picture statistics and are designed to operate with one or more coding passes. At least two method families include: a family of methods for a rate allocation with picture look-ahead; and a family of methods for average bit rate (ABR) control methods. At least two other methods for each method family are described. For the first family of methods, some methods may involve intra rate control. For the second family of methods, some methods may involve high complexity ABR control and/or low complexity ABR control. These and other embodiments can involve any of the following: spatial coding parameter adaptation, coding prediction, complexity processing, complexity estimation, complexity filtering, bit rate considerations, quality considerations, coding parameter allocation, and/or hierarchical prediction structures, among others.

公开(公告)号：US20240080479A1

公开(公告)日：2024-03-07

申请号：US18503711

申请日：2023-11-07

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Alexandros Tourapis ,  Walter J. Husak ,  Peshala V. Pahalawatta ,  Athanasios Leontaris

IPC: H04N19/597 ,  H04N13/139 ,  H04N13/161 ,  H04N13/194 ,  H04N19/112 ,  H04N19/132 ,  H04N19/16 ,  H04N19/176 ,  H04N19/33 ,  H04N19/46 ,  H04N19/587 ,  H04N19/60 ,  H04N19/61 ,  H04N19/85 ,  H04N21/2365 ,  H04N21/2383 ,  H04N21/434 ,  H04N21/438

CPC classification number: H04N19/597 ,  H04N13/139 ,  H04N13/161 ,  H04N13/194 ,  H04N19/112 ,  H04N19/132 ,  H04N19/16 ,  H04N19/176 ,  H04N19/33 ,  H04N19/46 ,  H04N19/587 ,  H04N19/60 ,  H04N19/61 ,  H04N19/85 ,  H04N21/2365 ,  H04N21/2383 ,  H04N21/4347 ,  H04N21/4382

Abstract: Sampled data is packaged in checkerboard format for encoding and decoding. The sampled data may be quincunx sampled multi-image video data (e.g., 3D video or a multi-program stream), and the data may also be divided into sub-images of each image which are then multiplexed, or interleaved, in frames of a video stream to be encoded and then decoded using a standardized video encoder. A system for viewing may utilize a standard video decoder and a formatting device that de-interleaves the decoded sub-images of each frame reformats the images for a display device. A 3D video may be encoded using a most advantageous interleaving format such that a preferred quality and compression ratio is reached. In one embodiment, the invention includes a display device that accepts data in multiple formats.

公开(公告)号：US11792429B2

公开(公告)日：2023-10-17

申请号：US18175122

申请日：2023-02-27

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Alexandros Tourapis ,  Athanasios Leontaris ,  Peshala V. Pahalawatta ,  Kevin J. Stec

IPC: H04N19/597 ,  H04N19/80 ,  H04N19/17 ,  H04N13/161 ,  H04N13/172 ,  H04N13/178 ,  H04N13/218 ,  H04N19/154 ,  H04N19/85 ,  H04N19/44 ,  H04N19/895 ,  H04N19/70 ,  H04N7/01 ,  H04N21/434 ,  H04N19/176 ,  H04N19/587 ,  H04N19/172 ,  H04N19/423 ,  H04N13/10 ,  H04N19/86 ,  H04N19/89 ,  H04N19/40

CPC classification number: H04N19/597 ,  H04N7/0102 ,  H04N7/0117 ,  H04N7/0135 ,  H04N13/161 ,  H04N13/172 ,  H04N13/178 ,  H04N13/218 ,  H04N19/154 ,  H04N19/17 ,  H04N19/172 ,  H04N19/176 ,  H04N19/423 ,  H04N19/44 ,  H04N19/587 ,  H04N19/70 ,  H04N19/80 ,  H04N19/85 ,  H04N19/865 ,  H04N19/895 ,  H04N21/4347 ,  H04N13/10 ,  H04N19/40 ,  H04N19/86 ,  H04N19/89

Abstract: An encoding device evaluates a plurality of processing and/or post-processing algorithms and/or methods to be applied to a video stream, and signals a selected method, algorithm, class or category of methods/algorithms either in an encoded bitstream or as side information related to the encoded bitstream. A decoding device or post-processor utilizes the signaled algorithm or selects an algorithm/method based on the signaled method or algorithm. The selection is based, for example, on availability of the algorithm/method at the decoder/post-processor and/or cost of implementation. The video stream may comprise, for example, downsampled multiplexed stereoscopic images and the selected algorithm may include any of upconversion and/or error correction techniques that contribute to a restoration of the downsampled images.