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Data generation method, data reproduction method, data generation device and data reproduction device

專利號
US10887967B2
公開日期
2021-01-05
申請人
Panasonic Intellectual Property Management Co., Ltd.（JP Osaka）
發(fā)明人
Virginie Drugeon; Takahiro Nishi; Tadamasa Toma
IPC分類
H04N9/80; H05B47/10; H04N21/2343; H04N21/236; H04N21/4402; H04N19/70; H04N21/434; H04N19/85; H04N19/98; H05B45/37; H05B47/11; H05B47/19; H04N7/01; H02M1/084; H02M1/14; H02M1/00
技術領域
oetf,video,luminance,data,hybrid,hdr,sei,sdr,descriptor,dynamic
地域： Osaka

摘要

A data generation method is for generating video data that covers a second luminance dynamic range wider than a first luminance dynamic range and has reproduction compatibility with a first device that does not support reproduction of video having the second luminance dynamic range and supports reproduction of video having the first luminance dynamic range, and includes: generating a video signal to be included in the video data using a second OETF; storing, into VUI in the video data, first transfer function information for identifying a first OETF to be referred to by the first device when the first device decodes the video data; and storing, into SEI in the video data, second transfer function information for identifying a second OETF to be referred to by a second device supporting reproduction of video having the second luminance dynamic range when the second device decodes the video data.

說明書

FIG. 12 illustrates a stream and an operation of a data reproduction device according to an embodiment;

FIG. 13 is a flowchart illustrating an operation of a data generation device according to an embodiment; and

FIG. 14 is a flowchart illustrating an operation of a data reproduction device according to an embodiment.

DETAILED DESCRIPTION OF THE EMBODIMENT

(Underlying Knowledge Forming Basis of the Present Disclosure)

The high dynamic range (HDR) has been gaining attention as a scheme covering a luminance range with an increased maximum luminance value in order to represent bright light such as mirror-reflected light, which cannot be represented using current TV signals, with brightness closer to its actual brightness while maintaining dark grayscale values of existing video. Specifically, the scheme covering the luminance range supported by the existing TV signals is called the standard dynamic range (SDR) and has the maximum luminance value of 100 nit, and the HDR is expected to have an increased maximum luminance value of at least 1,000 nit.

It is desired that video data covering such an HDR be reproducible even by an existing reproduction device that supports only the SDR. In other words, there is a demand for video data that is reproducible as HDR video by a reproduction device supporting the HDR and reproducible as SDR video by a reproduction device supporting the SDR.

權利要求

What is claimed is:1. A data reproduction device comprising:a receiver configured to receive video data from a data generation device,the video data being generated according to a High Efficiency Video Coding (HEVC) standard,video usability information (VUI) including a value selected from candidate values, the candidate values indicating respective opt-electrical transfer functions (OETFs), the OETFs including at least one OETF supporting a standard dynamic range (SDR) for the video data, andsupplemental enhancement information (SEI) including a high dynamic range (HDR) parameter; anda processor configured to widen a SDR to generate a HDR according to the HDR parameter to reproduce the video data.
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