Display method and display device

Patent metadata

Field	Value
Publication number	US-10891722-B2
Application number	US-201916512846-A
Country	US
Kind code	B2
Filing date	Jul 16, 2019
Priority date	May 26, 2015
Publication date	Jan 12, 2021
Grant date	Jan 12, 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 indicating a correlation of HDR luminance and code values. The method includes: acquiring the video data; performing, regarding each of multiple pixels making up the video in the acquired video data, first determining of determining whether luminance of that pixel exceeds a first predetermined luminance; performing, regarding each of the multiple pixels, dual tone mapping where luminance of that pixel is reduced by a different format in a case of the luminance of the pixel being found to exceed the first predetermined luminance from the first determining, and a case of the luminance of the pixel being found to be equal to or lower than the first predetermined luminance; and displaying the video on the display device using the results of the dual tone mapping.

First claim

What is claimed is:

1. A playback device comprising:
an adding unit for reading video data recorded in a recording medium and adding static metadata to the video data, the static metadata indicating whether luminance of a video of the video data is absolute-luminance managed or relative-luminance managed; and
an output unit for outputting the video data including the static metadata to a display device,
wherein being absolute-luminance managed indicates that the luminance is managed by using a real value of the luminance of the video; and
wherein being relative-luminance managed indicates that the luminance is managed by using a value obtained by quantizing the real value of the luminance of the video by floating decimal point.

2. A display device comprising:
an obtainer for obtaining video data;
a determining unit for determining whether luminance of a video of the video data is absolute-luminance managed or relative-luminance managed based on static metadata included in the video data; and
a tone mapping unit for converting the luminance of the video data based on a result of the determination performed by the determining unit,
wherein being absolute-luminance managed indicates that the luminance is managed by using a real value of the luminance of the video; and
wherein being relative-luminance managed indicates that the luminance is managed by using a value obtained by quantizing the real value of the luminance of the video by floating decimal point.

3. A playback device comprising:
a processor; and
a memory including at least one set of instructions that, when executed by the processor, cause the processor to perform operations including:
reading video data recorded in a recording medium and adding static metadata to the video data, the static metadata indicating whether luminance of a video of the video data is absolute-luminance managed or relative-luminance managed; and
outputting the video data including the static metadata to a display device,

wherein being absolute-luminance managed indicates that the luminance is managed by using a real value of the luminance of the video; and
wherein being relative-luminance managed indicates that the luminance is managed by using a value obtained by quantizing the real value of the luminance of the video by floating decimal point.

4. A display device comprising:
a processor; and
a memory including at least one set of instructions that, when executed by the processor, cause the processor to perform operations including:
obtaining video data;
determining whether luminance of a video of the video data is absolute-luminance managed or relative-luminance managed based on a static metadata included in the video data; and
converting the luminance of the video data based on a result of the determination performed in the determining,

wherein being absolute-luminance managed indicates that the luminance is managed by using a real value of the luminance of the video; and
wherein being relative-luminance managed indicates that the luminance is managed by using a value obtained by quantizing the real value of the luminance of the video by floating decimal point.

5. A playback device comprising:
an adding unit for reading video data recorded in a recording medium and adding static metadata to the video data, the static metadata indicating whether luminance of a video of the video data is absolute-luminance managed or relative-luminance managed; and
an output unit for outputting the video data including the static metadata to a display device,
wherein the static metadata is at least one of (i) display peak luminance information representing a display peak luminance of a master monitor, (ii) display primary color information representing display primary color of the master monitor, (iii) white point information representing a white point of the master monitor, (iv) peak luminance information representing peak luminance of the video, and (v) maximum frame-average luminance information representing a maximum value of average luminance of each of a plurality of frames making up the video.

6. A display device comprising:
an obtainer for obtaining video data;
a determining unit for determining whether luminance of a video of the video data is absolute-luminance managed or relative-luminance managed based on static metadata included in the video data; and
a tone mapping unit for converting the luminance of the video data based on a result of the determination performed by the determining unit,
wherein the static metadata is at least one of (i) display peak luminance information representing a display peak luminance of a master monitor, (ii) display primary color information representing display primary color of the master monitor, (iii) white point information representing a white point of the master monitor, (iv) peak luminance information representing peak luminance of the video, and (v) maximum frame-average luminance information representing a maximum value of average luminance of each of a plurality of frames making up the video.

7. A playback device comprising:
a processor; and
a memory including at least one set of instructions that, when executed by the processor, cause the processor to perform operations including:
reading video data recorded in a recording medium and adding static metadata to the video data, the static metadata indicating whether luminance of a video of the video data is absolute-luminance managed or relative-luminance managed; and
outputting the video data including the static metadata to a display device,

wherein the static metadata is at least one of (i) display peak luminance information representing a display peak luminance of a master monitor, (ii) display primary color information representing display primary color of the master monitor, (iii) white point information representing a white point of the master monitor, (iv) peak luminance information representing peak luminance of the video, and (v) maximum frame-average luminance information representing a maximum value of average luminance of each of a plurality of frames making up the video.

8. A display device comprising:
a processor; and
a memory including at least one set of instructions that, when executed by the processor, cause the processor to perform operations including:
obtaining video data;
determining whether luminance of a video of the video data is absolute-luminance managed or relative-luminance managed based on a static metadata included in the video data; and
converting the luminance of the video data based on a result of the determination performed in the determining,

wherein the static metadata is at least one of (i) display peak luminance information representing a display peak luminance of a master monitor, (ii) display primary color information representing display primary color of the master monitor, (iii) white point information representing a white point of the master monitor, (iv) peak luminance information representing peak luminance of the video, and (v) maximum frame-average luminance information representing a maximum value of average luminance of each of a plurality of frames making up the video.

Assignees

• Panasonic Ip Corp America

Inventors

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

Classifications

• G09G5/00 Primary

  Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators (image data processing or generation, in general G06T) · CPC title

• G06T5/50

  using two or more images, e.g. averaging or subtraction · CPC title

• H04N21/431

  Generation of visual interfaces {for content selection or interaction}; Content or additional data rendering · CPC title

• G06T2207/10016

  Video; Image sequence · CPC title

• G06T2207/20208

  High dynamic range [HDR] image processing · CPC title