公开(公告)号：US20250133241A1

公开(公告)日：2025-04-24

申请号：US18688315

申请日：2022-09-08

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Harshad Kadu ,  Guan-Ming Su ,  Sheng Qu ,  Per Jonas Andreas Klittmark ,  Hariharan Ganapathy Kathirvelu

IPC: H04N19/98 ,  G06T5/90 ,  H04N19/186 ,  H04N19/46

Abstract: Tensor-Product B-splines (TPB) have been shown to improve video quality when used to represent reshaping functions to map reshaped standard dynamic range content into high dynamic range (HDR) content; however, TPB prediction is computationally intensive and may not be supported by legacy devices. Methods and systems for backwards-compatible signaling of TPB-related metadata and a fast TPB prediction method are presented to overcome both of these limitations. Computation overhead for a TPB-based 3D look-up table is reduced by using temporary two-dimensional arrays. A remapping of the most significant bits of a legacy bit-depth parameter allows for backwards compatibility.

公开(公告)号：US11743550B2

公开(公告)日：2023-08-29

申请号：US17617537

申请日：2020-06-26

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Robin Atkins ,  Per Jonas Andreas Klittmark

IPC: H04N21/485 ,  H04N21/435 ,  H04N21/84

CPC classification number: H04N21/4854 ,  H04N21/435 ,  H04N21/84

Abstract: Apparatus and methods for providing solutions to the problem of preserving original creative intent for video playback on a target display are presented herein. According to one aspect, a video bitstream includes metadata with a flag indicative of creative intent for a target display. This metadata may include numerous fields that denote characteristics such as content type, content sub-type, intended white point, whether or not to use the video in Reference Mode, intended sharpness, intended noise reduction, intended MPEG noise reduction, intended Frame Rate Conversion, intended Average Picture Level, and intended color. This metadata is designed to make it effortless for the content creators to tag their content. The metadata can be added to the video content at multiple points, the status of the flag is set to TRUE or FALSE to indicate whether the metadata was added by the content creator or a third party.

公开(公告)号：US12170815B2

公开(公告)日：2024-12-17

申请号：US18000773

申请日：2021-06-09

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Robin Atkins ,  Suzanne Farrell ,  Per Jonas Andreas Klittmark

IPC: H04N21/4402 ,  H04N21/435 ,  H04N21/442 ,  H04N21/81

Abstract: The described embodiments include systems and methods for producing and adapting images, such as video images, for presentation on display devices that have various different aspects ratios, such as 4:3, 16:9, 9:16, etc. In one embodiment, a method for producing content, such as video images, can begin by selecting an original aspect ratio and determining, within at least a first scene in the content, a position of a subject in the first scene. In one embodiment, the original aspect ratio can be substantially square (e.g., 1:1). Metadata can then be created, based on the position of the subject in the first scene, to guide playback devices to asymmetrically crop the content, relative to the position, for display on display devices that have aspect ratios that are different than the original aspect ratio. Other methods and systems are also described.