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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(shù)領(lǐng)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

An end of sequence (EOS) indicating the end of a video sequence is inserted into the video elementary stream in order that the parameter change becomes active. The hybrid SEI message adapted to the last signalled hybrid descriptor may be or may not be stored at a random access point (RAP) following the EOS.

The data reproduction device detects whether or not the EOS and the hybrid SEI message are present and makes a change according to the detection result.

In the example illustrated in FIG. 12, the data reproduction device obtains the hybrid descriptor containing HDR_hybrid_gamma_OETF_flag=0 in the HDR operating state. This allows the data reproduction device to start preparing for switching operations from the HDR to the SDR. Next, the data reproduction device switches the HDR to the SDR at the timing when the EOS is obtained. The hybrid SEI message is not present within a SDR video elementary stream, and thus the data reproduction device does not obtain the hybrid SEI message.

Next, the data reproduction device obtains the hybrid descriptor containing HDR_hybrid_gamma_OETF_flag=1 in the SDR operating state. This allows the data reproduction device to start preparing for switching operations from the SDR to the HDR. Next, the data reproduction device switches the SDR to the HDR at the timing when the EOS is obtained.

Hereinafter, the operations of data generation device 110 and data reproduction device 120 based on the above description will be described.

權(quán)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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