Display method and display device

Patent metadata

Field	Value
Publication number	US-10992898-B2
Application number	US-201916575729-A
Country	US
Kind code	B2
Filing date	Sep 19, 2019
Priority date	May 12, 2015
Publication date	Apr 27, 2021
Grant date	Apr 27, 2021

Abstract

Provided is a display method of displaying, on a display device, video of video data where luminance of video is defined by a first EOTF corresponding to HDR. The method includes: acquiring the video data; performing first conversion where the luminance of the video is converted to a luminance corresponding to a dynamic range of a third EOTF, where, with regard to a second EOTF that is part of the first EOTF and is the part of a luminance range where the peak luminance indicated by the peak luminance information included in the acquired video data is maximum luminance, the dynamic range of luminance of the second EOTF is reduced with maximum luminance of the second EOTF matching displayable luminance of the display device, while maintaining the relative relationship of luminance of the second EOTF; and displaying the video on the display device using the result of the first conversion.

First claim

What is claimed is:

1. A display method of displaying, on a display device, video of video data including peak luminance information indicating peak luminance of the video, where luminance of the video is defined by a first Electro-Optical Transfer Function (EOTF) indicating a correlation of High Dynamic Range (HDR) luminance and code values, the method comprising:
acquiring the video data;
performing conversion of Q converting a third EOTF to a fourth EOTF, and iii) converting, in the luminance of the video, a luminance of a dynamic range of the third EOTF to a luminance of a dynamic range of the fourth EOTF; and
displaying the video on the display device using the result of the conversion,
wherein a luminance range of a second EOTF is a part of a luminance range of the first EOTF from a minimum luminance to the peak luminance of the video indicated by the peak luminance information included in the acquired video data, and
wherein a luminance range of the third EOTF is a part of the luminance range of the second EOTF from the minimum luminance to a predetermined luminance, and a dynamic range of fourth EOTF is obtained by reducing a dynamic range of the third EOTF while maintaining a relative relationship of luminance of the third EOTF.

2. A display device displaying video of video data including peak luminance information indicating peak luminance of the video, where luminance of the video is defined by a first Electro-Optical Transfer Function (EOTF) indicating a correlation of High Dynamic Range (HDR) luminance and code values, the display device comprising:
a converter that acquires the video data, and that performs conversion of (i) converting a third EOTF to a fourth EOTF, and (ii) converting, in the luminance of the video, a luminance of a dynamic range of the third EOTF to a luminance of a dynamic range of the fourth EOTF; and
a display that displays the video using the result of the conversion,
wherein a luminance range of a second EOTF is a part of a luminance range of the first EOTF from a minimum luminance to the peak luminance of the video indicated by the peak luminance information included in the acquired video data, and
wherein a luminance range of the third EOTF is a part of the luminance range of the second EOTF from the minimum luminance to a predetermined luminance, and a dynamic range of fourth EOTF is obtained by reducing a dynamic range of the third EOTF while maintaining a relative relationship of luminance of the third EOTF.

Assignees

• Panasonic Ip Corp America

Inventors

• Kozuka Masayuki
• Higashida Takashi
• Mori Yoshihiro
• Hirakawa Haruyasu
• Toma Tadamasa

Classifications

• H04N21/4854

  for modifying image parameters, e.g. image brightness, contrast · CPC title

• H04N21/4518

  involving characteristics of one or more peripherals, e.g. peripheral type, software version, amount of memory available or display capabilities · CPC title

• H04N21/4402

  involving reformatting operations of video signals for household redistribution, storage or real-time display {(details of conversion of video standards at pixel level H04N7/01; video transcoding H04N19/40; adapting incoming signals to the display format of the display terminal G09G5/005; media handling at the source in data packet switching networks H04L65/764)} · CPC title

• H04N21/4345

  Extraction or processing of SI, e.g. extracting service information from an MPEG stream · CPC title

• H04N21/2362 Primary

  Generation or processing of Service Information [SI] · CPC title