Signal processing device, signal processing method, program, and video display device

Patent metadata

Field	Value
Publication number	US-12063483-B2
Application number	US-202017607569-A
Country	US
Kind code	B2
Filing date	Mar 30, 2020
Priority date	May 8, 2019
Publication date	Aug 13, 2024
Grant date	Aug 13, 2024

Abstract

Provided is a signal processing device including a displacement detection unit configured to detect a displacement amount of a video display panel that is vibrated to generate sound on the basis of an input audio signal, a threshold setting unit configured to calculate a displacement amount at which no image shake occurs and set a displacement amount calculated as a threshold, and a gain adjustment unit configured to adjust a level of the input audio signal on the basis of a result of comparison between a displacement amount detected by the displacement detection unit and the threshold.

First claim

The invention claimed is:

1. A signal processing device comprising:
a displacement detection unit configured to detect a displacement amount of a video display panel that is vibrated to generate sound on a basis of an input audio signal;
a threshold setting unit configured to calculate a displacement amount at which no image shake occurs and set a displacement amount calculated as a threshold;
a gain adjustment unit configured to adjust a level of the input audio signal on a basis of a result of comparison between a displacement amount detected by the displacement detection unit and the threshold; and
a control gain calculation unit configured to calculate a control gain on a basis of a result of comparison between a displacement amount detected by the displacement detection unit and the threshold, wherein
the gain adjustment unit adjusts a level of the input audio signal using the control gain.

2. The signal processing device according to claim 1 , wherein
the gain adjustment unit changes a gain from 0 dB to the control gain during predetermined attack time, and changes the gain from the control gain to 0 dB during predetermined release time.

3. The signal processing device according to claim 2 , wherein
the attack time is set to a value smaller than a value of the release time.

4. The signal processing device according to claim 1 , wherein
the displacement detection unit includes a filter that approximates a displacement characteristic of the video display panel, the displacement characteristic being measured in advance.

5. The signal processing device according to claim 1 , wherein
the gain adjustment unit adjusts a level of the input audio signal using the control gain so as not to allow the displacement amount to exceed the threshold.

6. The signal processing device according to claim 1 , wherein
the threshold setting unit calculates the displacement amount on a basis of a characteristic of an input video signal.

7. The signal processing device according to claim 6 , wherein
the threshold setting unit calculates the displacement amount on a basis of a characteristic related to luminance of the input video signal.

8. The signal processing device according to claim 6 , wherein
the threshold setting unit calculates the displacement amount on a basis of sensing data supplied from a sensor.

9. The signal processing device according to claim 8 , wherein
the sensor includes at least one of an illuminance sensor or a sensor that detects a viewer/listener.

10. The signal processing device according to claim 8 , wherein
the threshold setting unit calculates the displacement amount on a basis of specification information of the video display panel.

11. A signal processing method comprising:
causing a displacement detection unit to detect a displacement amount of a video display panel that is vibrated to generate sound on a basis of an input audio signal;
causing a threshold setting unit to calculate a displacement amount at which no image shake occurs and set a displacement amount calculated as a threshold;
causing a gain adjustment unit to adjust a level of the input audio signal on a basis of a result of comparison between a displacement amount detected by the displacement detection unit and the threshold; and
causing a control gain calculation unit to calculate a control gain on a basis of a result of comparison between a displacement amount detected by the displacement detection unit and the threshold, wherein
the level of the input audio signal is adjusted using the control gain.

12. A non-transitory computer readable medium storing a program which, when executed, causes a computer to perform a signal processing method, the signal processing method including:
causing a displacement detection unit to detect a displacement amount of a video display panel that is vibrated to generate sound on a basis of an input audio signal,
causing a threshold setting unit to calculate a displacement amount at which no image shake occurs and set a displacement amount calculated as a threshold,
causing a gain adjustment unit to adjust a level of the input audio signal on a basis of a result of comparison between a displacement amount detected by the displacement detection unit and the threshold; and
causing a control gain calculation unit to calculate a control gain on a basis of a result of comparison between a displacement amount detected by the displacement detection unit and the threshold, wherein
the level of the input audio signal is adjusted using the control gain.

13. A video display device comprising:
a vibration portion;
a video display panel configured to display a video and generate sound by being vibrated by the vibration portion;
a panel displacement control unit configured to control displacement of the video display panel; and
an amplifier configured to amplify an audio signal output from the panel displacement control unit and output an audio signal amplified to the vibration portion, wherein
the panel displacement control unit includes
a displacement detection unit configured to detect a displacement amount of the video display panel on a basis of an input audio signal,
a threshold setting unit configured to calculate a displacement amount at which no image shake occurs and set a displacement amount calculated as a threshold, and
a gain adjustment unit configured to adjust a level of the input audio signal on a basis of a result of comparison between a displacement amount detected by the displacement detection unit and the threshold; and
a control gain calculation unit configured to calculate a control gain on a basis of a result of comparison between a displacement amount detected by the displacement detection unit and the threshold, wherein
the gain adjustment unit adjusts a level of the input audio signal using the control gain.

Assignees

• Sony Group Corp

Inventors

• Kuroda Yoshiyuki
• Yoneda Michiaki

Classifications

• H04R2499/15

  Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops · CPC title

• H04R2440/05

  Aspects relating to the positioning and way or means of mounting of exciters to resonant bending wave panels · CPC title

• H04R1/02

  Casings; Cabinets {; Supports therefor;} Mountings therein (H04R1/28 takes precedence {; attachments for microphones H04R1/08; mounting of transducers in earpieces H04R1/1075}) · CPC title

• H03G3/20

  Automatic control ({H03G3/005 takes precedence;} combined with volume compression or expansion H03G7/00) · CPC title

• H04R2430/01

  Aspects of volume control, not necessarily automatic, in sound systems · CPC title