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Video display device, television receiver, transmitting device, control program, and recording medium

A technology for video display and control program, applied in the direction of TV, color TV, color TV components, etc., can solve problems such as increase, and achieve the effect of reducing psychological burden

Active Publication Date: 2019-03-01
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in video-related technologies, high-brightness display such as HDR is possible, and there are many opportunities for the viewer's perception of brightness to change significantly for each content.

Method used

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  • Video display device, television receiver, transmitting device, control program, and recording medium
  • Video display device, television receiver, transmitting device, control program, and recording medium
  • Video display device, television receiver, transmitting device, control program, and recording medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0037] (display device)

[0038] refer to figure 1 as well as figure 2 The display device 1 including the video processing device 20 according to the first embodiment will be described. figure 1 It is a block diagram showing the configuration of the display device 1 including the video processing device 20 according to the present embodiment. in addition, figure 2 It is a front view showing the appearance of the display device 1 . Such as figure 1 As shown, the display device 1 includes: a display panel 10 , a receiving unit 11 , and a video processing device 20 . In addition, the display device 1 may be configured to include a tuner, and may be implemented as a television receiver. In addition, the display device may also be called a video display device.

[0039] (Video processing device)

[0040] The video processing device 20 is a device that sequentially outputs a plurality of frames constituting a video by decoding the video signal received by the receiving uni...

example 1

[0080] (Example 1: Calculation method using MaxFALL)

[0081] In this example, the calculation unit 23 calculates the maximum frame average brightness MaxFALL (Maximum Frame Average Light Level) from the acquired video data, and sets the calculated MaxFALL as the perceived brightness value. Here, MaxFALL refers to the maximum value of the average luminance in all the frames constituting the video, and the algorithm is defined in accordance with CEA861.3. Figure 6 Pseudocode for calculating MaxFALL is shown.

[0082] Such as Figure 6As shown, the calculation unit 23 converts (R', G', B') which is a non-linear pixel value into cd / m 2 Linear brightness value (R, G, B) in units of (candela per square meter). And the maximum value among (R, G, B) is set as the maximum brightness value maxRGB of the pixel.

[0083] Also, the calculation unit 23 sets the average of the maximum luminance values ​​maxRGB of all pixels included in the effective image area as the average luminanc...

example 2

[0086] (Example 2: How to exclude black screens and white screens)

[0087] When all frames included in the video sequence include a frame having a white screen (a screen whose average luminance is equal to or greater than the threshold value Wt (Bk<Wt)), the value of MaxFALL becomes a very large value. The calculated video feature quantity is not suitable as a feature of the video sequence as a whole.

[0088] In this example, the calculation unit 23 calculates Perceived brightness value. By applying this example to the calculation of the perceived brightness value, it is possible to calculate a more appropriate perceived brightness value.

[0089] FIG. 7 shows a pseudo code for the calculation unit 23 to calculate the perceptual luminance value according to this example. As shown in FIG. 7 , the calculation unit 23 calculates the linear luminance value Y (linear luminance value) of the pixel according to a pixel included in the active image area (active image area) of a c...

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Abstract

Provided is a technique for preventing a viewer's perception of brightness changing significantly when content is switched. A video display device (1) is provided with: a calculating unit (23) which calculates a video feature quantity pertaining to a displayed video; and a mute video display unit which displays a mute video after a first displayed video. The luminance of the mute video correspondsto the value of the video feature quantity pertaining to the first displayed video.

Description

technical field [0001] The present invention relates to a video display device, a television receiver, a transmitting device, a control program, and a storage medium. Background technique [0002] Among technologies related to sound, there is known a technology that uses loudness, which is the magnitude of sound perceived by humans, to equalize the audience's perception of the magnitude of sound for each content. In addition, in video-related technologies, high-brightness display such as HDR is possible, and there are many opportunities for the viewer's perception of brightness to change significantly for each content. [0003] prior art literature [0004] patent documents [0005] Patent document 1: Japanese laid-open patent publication "Japanese Patent Laid-Open No. 2009-27550 (published on February 5, 2009)" Contents of the invention [0006] Technical problem to be solved by the present invention [0007] If the viewer's perception of brightness varies greatly for...

Claims

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Application Information

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IPC IPC(8): H04N5/44H04N5/57H04N5/60
CPCH04N5/57H04N5/38H04N7/007H04N7/0255H04N7/035H04N17/004
Inventor 樱井凉二铃木秀树西垣智夫吉山和良柴本尚昭手塚靖
Owner SHARP KK
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