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Graded silencing method for TV set

A TV, mute technology, applied in the field of TV, can solve the problems of being too sudden and harsh, and achieve the effect of eliminating popping sound and improving the sense of hearing.

Active Publication Date: 2009-05-13
HISENSE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method makes the viewer sound as if the sound stops abruptly, too abruptly
And if the voice coil unit of the speaker is at a far point from the equilibrium position at that time, the elasticity of the paper cone will cause the voice coil unit to quickly return to the equilibrium position. This process will generate a strong damped sound wave, which subjectively sounds like a Popping sound, quite harsh

Method used

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  • Graded silencing method for TV set
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  • Graded silencing method for TV set

Examples

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Embodiment 1

[0083] Example 1. A gradual mute method for a television set. It includes steps such as directly grounding the audio input of the TV's power amplifier. Before the above step of directly grounding the audio input terminal, the following steps are also included:

[0084] (1) After the CPU issues the mute command, the program for detecting the current volume is first started to detect the current volume;

[0085] (2) On this basis, run the volume reduction program to reduce the audio input voltage of the power amplifier, and perform delay processing at the same time;

[0086] (3) Repeat the above two steps (1) and (2) several times until the audio input voltage of the power amplifier drops to zero. Next comes the step of grounding the audio input of the power amplifier directly.

[0087] Figure 4 It is the sound voltage output waveform diagram of the method of this embodiment. It can be seen from the figure that the output voltage gradually drops to zero voltage within 0.4...

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Abstract

The present invention is gradually muting method and belongs to the field of TV set technology. The gradually muting method includes four steps of: initiating volume detecting program to detect current volume after the CPU gives muting command; running the volume lowering program to lower the audio input voltage to the power amplifier while delaying; repeating the foregoing steps until the audio input voltage to the power amplifier is lowered to zero; and earthing the audio input of the power amplifier directly. The said method lower the volume gradually, has good hearing and may be used widely in various TV sets.

Description

technical field [0001] The invention belongs to the technical field of television sets, and more specifically relates to the improvement of the gradual mute method of the television set. Background technique [0002] Existing color TV adopts the method of directly reducing the volume to zero when the sound is muted, that is, the audio input terminal of the power amplifier is directly grounded by the CPU to control the hardware circuit, so as to achieve the purpose of silence. This method makes the viewer sound as if the sound stops abruptly, too abruptly. And if the voice coil unit of the speaker is at a far point from the equilibrium position at that time, the elasticity of the paper cone will cause the voice coil unit to quickly return to the equilibrium position. This process will generate a strong damped sound wave, which subjectively sounds like a Popping sound, quite harsh. Contents of the invention [0003] The object of the present invention is just to overcome a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/60
Inventor 毕强
Owner HISENSE