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A sound output control method, control system and intelligent mobile terminal

A sound output and control system technology, applied in the direction of gain control, amplification control, electrical components, etc., can solve the problem of increasing additional costs, achieve dynamic adjustment, save the voltage regulator, and save the cost of circuit components.

Active Publication Date: 2015-09-02
珠海丽磁音响有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This adds additional cost to the entire control system due to the voltage regulator

Method used

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  • A sound output control method, control system and intelligent mobile terminal
  • A sound output control method, control system and intelligent mobile terminal
  • A sound output control method, control system and intelligent mobile terminal

Examples

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Embodiment 1

[0040] figure 2 A schematic diagram of a sound output control method provided by an embodiment of the present invention is shown. The sound output control method in the embodiment of the present invention is applied to a sound output control system, and the operating voltage VDD of the audio power amplifier in the sound output control system is directly determined by The output voltage Vbat of the power supply device is provided, and the voltage output from the power supply device is no longer regulated by the voltage regulator before being output to the audio power amplifier. In order to solve the problem that the working voltage directly provided by the power supply device to the audio power amplifier is unstable, gain compensation is performed on the working voltage during the decoding process of the audio decoder in the embodiment of the present invention. Specifically include the following steps:

[0041] Step S201: Detect the current working voltage VDD provided by the...

Embodiment 2

[0073] Figure 5 A schematic structural diagram of an intelligent mobile terminal provided by another embodiment of the present invention is shown, and the intelligent mobile terminal may be a mobile phone, a tablet computer, a PDA, etc. in practical applications.

[0074] Such as Figure 5 As shown, the smart mobile terminal includes a power supply device 401 (which may be a battery), an audio power amplifier 402, a processor 403 (which may be a CPU), an audio decoder 404 and a sound generating device 405 (which may be a speaker or an earphone).

[0075]Wherein, the voltage output terminal of the power supply device 401 is directly connected to the working voltage input terminal of the audio power amplifier 402 to provide the working voltage for the audio power amplifier 402 . The output end of the audio decoder 404 is connected to the input end of the audio power amplifier 402, and the audio decoder 404 outputs the decoded audio signal to the audio power amplifier 402, and ...

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Abstract

The invention provides a voice output control method, a control system thereof and an intelligent mobile terminal. The working voltage of an audio power amplifier in the voice output control system is supplied by the output voltage of a power supply device. The method comprises the steps of detecting the current working voltage of the audio power amplifier provided by the power supply device, determining the compensation gain value corresponding to the current working voltage according to the pre-established corresponding relation between the working voltage and the compensation gain value, and carrying out gain compensation on an audio signal according to the compensation gain value in the decoding process of the audio signal such that the audio power amplifier carries out power amplification processing according to the decoded audio signal which is subjected to the gain compensation. According to the scheme of the embodiment of the invention, under the premise of realizing the stable volume, the cost of circuit components can be saved.

Description

technical field [0001] The invention relates to the field of sound output control, in particular to a sound output control method, a control system and an intelligent mobile terminal. Background technique [0002] At present, in order to ensure that the sound output is not affected by the input voltage fluctuation due to factors such as battery power attenuation, it is necessary to have a voltage regulator at the voltage input end of the audio power amplifier. Such as figure 1 In the sound output control system of the existing portable electronic products shown, the digital signal is transmitted to the audio audio decoder through the processor, and after the sound is decoded by the audio audio decoder, the sound signal is transmitted to the audio power amplifier, and the After the audio power amplifier amplifies the sound signal, it is output by the speaker. The voltage of the power supply (usually a battery for portable electronic products) may fluctuate. In order to prev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03G3/30
Inventor 李镒霖萧杰灵蔡佳青林志杰
Owner 珠海丽磁音响有限公司