Reception device, broadcast system, reception method, and program

• US 10,477,176 B2
• Filed: 08/17/2016
• Issued: 11/12/2019
• Est. Priority Date: 08/24/2015
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Sakurai, Ryoji, Taniguchi, Shigeki
• Primary Examiner(s): Natnael, Paulos M
• Application Number:
  US15/754,367
• Publication Number:
  US 20180249140A1
• Time in Patent Office: 1,182 Days
• CPC Class Codes: H04N 11/20 Conversion of the manner in which the individual colour picture signal components are combined, e.g. conversion of colour television standards
• CPC Class Codes: H04N 21/41 Structure of client; Structure of client peripherals
• CPC Class Codes: H04N 21/431 Generation of visual interfaces for content selection or interaction; Content or additional data rendering
• CPC Class Codes: H04N 21/4345 Extraction or processing of SI, e.g. extracting service information from an MPEG stream
• CPC Class Codes: H04N 21/4402 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 Class Codes: H04N 21/4854 for modifying image parameters, e.g. image brightness, contrast
• CPC Class Codes: H04N 9/646 for image enhancement, e.g. vertical detail restoration, cross-colour elimination, contour correction, chrominance trapping filters
• CPC Class Codes: H04N 9/77 Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase circuits for matrixing H04N9/67

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.

Claims

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.

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

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.