Reception device, broadcast system, reception method, and program

Patent metadata

Field	Value
Publication number	US-2018249140-A1
Application number	US-201615754367-A
Country	US
Kind code	A1
Filing date	Aug 17, 2016
Priority date	Aug 24, 2015
Publication date	Aug 30, 2018
Grant date	—

Abstract

A service information processing unit acquires, from service information of content, current information that indicates luminance information of a video at a current time point and preannouncement information that indicates luminance information of the video after a given time from the current time point, a level control unit, when a luminance range indicated by the preannouncement information changes from a luminance range of the video at the current time point, changes a luminance range more gently compared to a change of the luminance range, and a display unit displays the video in the luminance range defined by the level control unit.

First claim

1 . A reception device comprising:
a service information processing unit that acquires, from service information of content, current information that indicates luminance information of a video at a current time point and preannouncement information that indicates luminance information of the video after a given time from the current time point; a level control unit that, when a luminance range indicated by the preannouncement information changes from a luminance range of the video at the current time point, changes a luminance range more gently compared to a change of the luminance range; and a display unit that displays the video in the luminance range defined by the level control unit.

2 . The reception device according to claim 1 , wherein
when the luminance range specified by the preannouncement information is expanded from the luminance range of the video at the current time point, the level control unit changes the luminance range over a longer time compared to a case where the luminance range indicated by the preannouncement information is reduced.

3 . The reception device according to claim 1 , wherein
when the luminance range indicated by the preannouncement information is wider than the luminance range of the video at the current time point, the level control unit gradually reduces maximum luminance of the video to given luminance within the given time.

4 . The reception device according to claim 3 , wherein
the level control unit gradually releases luminance reduction to the given luminance after the given time has lapsed.

5 . The reception device according to claim 3 , wherein
in a case where an effective duration time is further set to the luminance information indicated by the preannouncement information, the level control unit gradually releases luminance reduction to the given luminance when the duration time has further lapsed after the given time.

6 . The reception device according to claim 1 , further comprising
a display control unit that, when the luminance range indicated by the preannouncement information changes, notifies a change of the luminance range.

7 . A broadcast system including a transmission device and a reception device, wherein
the transmission device transmits content and service information of the content that includes current information that indicates luminance information of a video at a current time point and preannouncement information that indicates luminance information of the video after a given time from the current time point, and the reception device includes: a service information processing unit that acquires the current information and the preannouncement information from the service information; a level control unit that, when a luminance range indicated by the preannouncement information changes from a luminance range of the video at the current time point, changes a luminance range more gently compared to a change of the luminance range; and a display unit that displays the video in the luminance range defined by the level control unit.

8 . A reception method in a reception device, the reception method comprising:
acquiring, from service information of content, current information that indicates luminance information of a video at a current time point and preannouncement information that indicates luminance information of the video after a given time from the current time point; and when a luminance range indicated by the preannouncement information changes from a luminance range of the video at the current time point, changing a luminance range, in which the video is displayed, more gently compared to a change of the luminance range.

9 . A non-transitory computer readable recording medium storing a program causing a computer of a reception device to execute:
acquiring, from service information of content, current information that indicates luminance information of a video at a current time point and preannouncement information that indicates luminance information of the video after a given time from the current time point; and when a luminance range indicated by the preannouncement information changes from a luminance range of the video at the current time point, changing a luminance range, in which the video is displayed, more gently compared to a change of the luminance range.

Assignees

• Sharp Kk

Inventors

• Sakurai Ryoji
• Taniguchi Shigeki

Classifications

• H04N21/41

  Structure of client; Structure of client peripherals · 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

• H04N21/431

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

• H04N21/4854 Primary

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

• H04N11/20

  Conversion of the manner in which the individual colour picture signal components are combined, e.g. conversion of colour television standards · CPC title