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公开(公告)号：US10701399B2
公开(公告)日：2020-06-30
申请号：US16538485
申请日：2019-08-12
Inventor： Klaas Heinrich Schueuer , David Brooks , Satoshi Teshigawara , Tao Chen
IPC: H04N19/65 , H04N19/30 , H04N19/463 , H04N7/015
Abstract: In a method to reconstruct a high dynamic range video signal, a decoder receives a base layer standard dynamic range video signal, an enhancement layer video signal, and a metadata bitstream for a reference processing unit. A decoder reconstructs a high-dynamic range video output signal based on the base layer video signal, the enhancement layer video signal, and the data syntax and metadata specified by the metadata bitstream.
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公开(公告)号：US10575005B2
公开(公告)日：2020-02-25
申请号：US15745647
申请日：2016-07-20
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Guan-Ming Su , Sheng Qu , Samir N. Hulyalkar , David Brooks
Abstract: In a method to code and transmit scalable HDR video signals, HDR signals are processed and encoded in the IPT-PQ color space to generate a base layer at reduced spatial resolution and/or dynamic range, and an enhancement layer with a residual signal. A signal reshaping block before the base layer encoder allows for improved coding of HDR signals using a reduced bit depth. A decoder can use a BL decoder and backward reshaping to generate a decoded BL HDR signal at a reduced dynamic range and/or spatial resolution, or it can combine the decoded BL HDR signal and the EL stream to generate a decoded HDR signal at full dynamic range and full resolution.
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Patent Agency Ranking
公开(公告)号：US20180220144A1
公开(公告)日：2018-08-02
申请号：US15745647
申请日：2016-07-20
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Guan-Ming Su , Sheng Qu , Samir N. Hulyalkar , David Brooks
Abstract: In a method to code and transmit scalable HDR video signals, HDR signals are processed and encoded in the IPT-PQ color space to generate a base layer at reduced spatial resolution and/or dynamic range, and an enhancement layer with a residual signal. A signal reshaping block before the base layer encoder allows for improved coding of HDR signals using a reduced bit depth. A decoder can use a BL decoder and backward reshaping to generate a decoded BL HDR signal at a reduced dynamic range and/or spatial resolution, or it can combine the decoded BL HDR signal and the EL stream to generate a decoded HDR signal at full dynamic range and full resolution.
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公开(公告)号：US10462491B2
公开(公告)日：2019-10-29
申请号：US15764308
申请日：2016-11-01
Inventor： Klaas Heinrich Schueuer , David Brooks , Satoshi Teshigawara , Tao Chen
IPC: H04N19/65 , H04N19/30 , H04N19/463 , H04N7/015
Abstract: In a method to reconstruct a high dynamic range video signal, a decoder receives a base layer standard dynamic range video signal, an enhancement layer video signal, a metadata bitstream for a reference processing unit and a CRC code related to the metadata. A decoder reconstructs a high-dynamic range video output signal based on the base layer video signal, the enhancement layer video signal, and the data syntax and metadata specified by the metadata bitstream.
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公开(公告)号：US10440401B2
公开(公告)日：2019-10-08
申请号：US15481015
申请日：2017-04-06
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
Inventor： Guan-Ming Su , Qian Chen , Tao Chen , David Brooks , Samir N. Hulyalkar , Peng Yin
Abstract: A processor for video coding receives a full-frame rate (FFR) HDR video signal and a corresponding FFR SDR video signal. An encoder generates a scalable bitstream that allows decoders to generate half-frame-rate (HFR) SDR, FFR SDR, HFR HDR, or FFR HDR signals. Given odd and even frames of the input FFR SDR signal, the scalable bitstream combines a base layer of coded even SDR frames with an enhancement layer of coded packed frames, where each packed frame includes a downscaled odd SDR frame, a downscaled even HDR residual frame, and a downscaled odd HDR residual frame. In an alternative implementation, the scalable bitstream combines four signals layers: a base layer of even SDR frames, an enhancement layer of odd SDR frames, a base layer of even HDR residual frames and an enhancement layer of odd HDR residual frames. Corresponding decoder architectures are also presented.
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公开(公告)号：US09967599B2
公开(公告)日：2018-05-08
申请号：US14786503
申请日：2014-04-07
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Sheng Qu , Ailan Hu , Gopi Lakshminarayan , David Brooks
IPC: H04N21/235 , H04N21/4363 , H04N5/38 , H04N9/64 , G09G5/00
CPC classification number: H04N21/2353 , G09G5/006 , G09G2370/047 , G09G2370/12 , H04N5/38 , H04N9/646 , H04N21/43635
Abstract: In an embodiment, a media source combines reference code values and mapping function parameters for mapping functions into video frames originally designated to carry pixel values. The video frames are delivered to a downstream device such as a media sink in an encoded video signal. The media sink extracts the mapping function parameters for the mapping functions from the encoded video signal and applies the mapping functions as a part of display management operations to map the reference code values to the mapped pixel values appropriate for the media sink. The mapped pixel values can be used to render images as represented by the reference code values.
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公开(公告)号：US11158032B2
公开(公告)日：2021-10-26
申请号：US16495532
申请日：2018-03-19
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Robin Atkins , David Brooks , Jaclyn Anne Pytlarz , Jon S. McElvain , Robert Wanat
IPC: G06T5/00
Abstract: Input scene images are captured from an original scene. The input scene images may be represented in an input color space. The input scene images are converted into color-space-converted scene images in one of an LMS color space, an ICtCp color space, etc. Scene light levels represented in the color-space-converted scene images are mapped, based at least in part on an optical transfer function, to mapped light levels. A tone mapping is applied to the mapped light levels to generate corresponding display light levels to be represented in display images. The display images may be rendered on a target display.
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