Reception device, broadcast system, reception method, and program

Patent metadata

Field	Value
Publication number	US-10477176-B2
Application number	US-201615754367-A
Country	US
Kind code	B2
Filing date	Aug 17, 2016
Priority date	Aug 24, 2015
Publication date	Nov 12, 2019
Grant date	Nov 12, 2019

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

The invention claimed is:

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, in a case that a preannouncement luminance range indicated by the preannouncement information changes from a current luminance range of the video at the current time point, changes the current luminance range over a given luminance transition time; and
a display unit that displays the video in the current luminance range defined by the level control unit, wherein
the level control unit:
determines whether the preannouncement luminance range is expanded or reduced from the current luminance range,
changes, over a first time, the current luminance range to the preannouncement luminance range in a case that the preannouncement luminance range is expanded from the current luminance range, and
changes, over a second time shorter than the first time, the current luminance range to the preannouncement luminance range in a case that the preannouncement luminance range is reduced from the current luminance range.

2. The reception device according to claim 1 , wherein
in a case that the preannouncement luminance range is wider than the current luminance range, the level control unit reduces maximum luminance of the video to given luminance within the given time.

3. The reception device according to claim 2 , wherein
the level control unit releases luminance reduction to the given luminance after the given time has lapsed.

4. The reception device according to claim 2 , 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 releases luminance reduction to the given luminance in a case that the duration time has further lapsed after the given time.

5. The reception device according to claim 1 , further comprising
a display control unit that, in a case that the preannouncement luminance range changes, notifies a change of the preannouncement luminance range.

6. 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, in a case that a preannouncement luminance range indicated by the preannouncement information changes from a current luminance range of the video at the current time point, changes the current luminance range over a given luminance transition time; and
a display unit that displays the video in the current luminance range defined by the level control unit;

the level control unit:
determines whether the preannouncement luminance range is expanded or reduced from the current luminance range,
changes, over a first time, the current luminance range to the preannouncement luminance range in a case that the preannouncement luminance range is expanded from the current luminance range, and
changes, over a second time shorter than the first time, the current luminance range to the preannouncement luminance range in a case that the preannouncement luminance range is reduced from the current luminance range.

7. 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;
in a case that a preannouncement luminance range indicated by the preannouncement information changes from a current luminance range of the video at the current time point, changing the current luminance range, in which the video is displayed, over a given luminance transition time; and
determining whether the preannouncement luminance range is expanded or reduced from the current luminance range, wherein
the current luminance range to the preannouncement luminance range is changed over a first time in a case that the preannouncement luminance range is expanded from the current luminance range, and
the current luminance range to the preannouncement luminance range is changed over a second time shorter than the first time in a case that the preannouncement luminance range is reduced from the current luminance range.

8. 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;
in a case that a preannouncement luminance range indicated by the preannouncement information changes from a current luminance range of the video at the current time point, changing the current luminance range, in which the video is displayed, over a given luminance transition time; and
determining whether the preannouncement luminance range is expanded or reduced from the current luminance range, wherein
the current luminance range to the preannouncement luminance range is changed over a first time in a case that the preannouncement luminance range is expanded from the current luminance range, and
the current luminance range to the preannouncement luminance range is changed over a second time shorter than the first time in a case that the preannouncement luminance range is reduced from the current luminance range.

9. The reception device according to claim 1 , wherein the given time is 2 to 3 seconds.

Assignees

• Sharp Kk

Inventors

• Sakurai Ryoji
• Taniguchi Shigeki

Classifications

• 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

• H04N21/41

  Structure of client; Structure of client peripherals · CPC title

• H04N21/431

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

• H04N21/4345

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

• H04N21/4854 Primary

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