CN106101933A - Volume adjusting method and device of power amplifier system - Google Patents
Volume adjusting method and device of power amplifier system Download PDFInfo
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Abstract
本发明公开一种功放系统的音量调节方法及装置；功放系统包括用于对接收的音频信号进行功率放大处理的功放模块、用于为功放模块提供工作电压的电源模块及用于输出音量控制信号的音量控制模块；其中，功放系统的音量调节方法包括以下步骤：检测音量控制模块是否输出用于调节功放系统音量值的音量控制信号；若检测到音量控制信号，则控制电源模块输出与音量控制信号匹配的电源电压，以使功放系统的音量值为与音量控制信号对应。本发明技术方案能够提高功放系统的效率。
The invention discloses a volume adjustment method and device of a power amplifier system; the power amplifier system includes a power amplifier module for performing power amplification processing on a received audio signal, a power supply module for providing an operating voltage for the power amplifier module, and an output volume control signal A volume control module; wherein, the volume adjustment method of the power amplifier system includes the following steps: detecting whether the volume control module outputs a volume control signal for adjusting the volume value of the power amplifier system; if the volume control signal is detected, then controlling the output of the power supply module and the volume control The power supply voltage that the signal matches, so that the volume value of the power amplifier system corresponds to the volume control signal. The technical scheme of the invention can improve the efficiency of the power amplifier system.
Description
技术领域technical field
本发明涉及音频处理技术领域，特别涉及一种功放系统的音量调节方法及装置。The invention relates to the technical field of audio processing, in particular to a volume adjustment method and device for a power amplifier system.
背景技术Background technique
音响设备中的功率放大系统(简称功放系统)包括供电电源、功率放大电路及音量控制模块；其中，供电电源用于给功率放大电路提供工作电压，功率放大电路用于将音频信号的功率(幅值)进行放大处理以推动喇叭发声，音量控制模块用于输出音量控制信号。The power amplification system (referred to as the power amplifier system) in the audio equipment includes a power supply, a power amplification circuit and a volume control module; among them, the power supply is used to provide the working voltage for the power amplification circuit, and the power amplification circuit is used to convert the power (amplitude) of the audio signal value) is amplified to push the speaker to sound, and the volume control module is used to output the volume control signal.
在音响设备工作过程中，用户往往会根据个人喜好对喇叭音量进行调节。现有的音量调节装置通过采用根据音量控制信号大小调节输入至功率放大电路的音频信号的音量分量的幅值的方式，实现对喇叭音量的调节。During the working process of audio equipment, users often adjust the speaker volume according to their personal preferences. The existing volume adjustment device adjusts the volume of the speaker by adjusting the amplitude of the volume component of the audio signal input to the power amplifier circuit according to the volume control signal.
该音量调节装置虽然能够实现音频信号最大音量下推动喇叭不失真输出，但是在音频信号音量降低的过程中，功率放大电路的输出功率会随之减小，而供电电压维持不变。这样，当音量降低时，功率放大电路的输入功率不变，而输出功率减小，效率降低。Although the volume adjusting device can realize the output of the loudspeaker without distortion at the maximum volume of the audio signal, when the volume of the audio signal decreases, the output power of the power amplifier circuit will decrease accordingly, while the power supply voltage remains unchanged. In this way, when the volume decreases, the input power of the power amplifier circuit remains unchanged, while the output power decreases and the efficiency decreases.
发明内容Contents of the invention
本发明的主要目的是提供一种功放系统的音量调节方法，旨在提高功放系统的效率。The main purpose of the present invention is to provide a volume adjustment method for a power amplifier system, aiming at improving the efficiency of the power amplifier system.
为实现上述目的，本发明提出一种功放系统的音量调节方法，所述功放系统包括用于对接收的音频信号进行功率放大处理的功放模块、用于为所述功放模块提供工作电压的电源模块及用于输出音量控制信号的音量控制模块；其中，所述功放系统的音量调节方法包括以下步骤：In order to achieve the above object, the present invention proposes a volume adjustment method for a power amplifier system, the power amplifier system includes a power amplifier module for performing power amplification processing on received audio signals, and a power supply module for providing an operating voltage for the power amplifier module And a volume control module for outputting a volume control signal; wherein, the volume adjustment method of the power amplifier system includes the following steps:
检测所述音量控制模块是否输出用于调节功放系统音量值的音量控制信号；Detecting whether the volume control module outputs a volume control signal for adjusting the volume value of the power amplifier system;
若检测到所述音量控制信号，则控制所述电源模块输出与所述音量控制信号匹配的电源电压，以使所述功放系统的音量值为所述音量控制信号所调节的音量值。If the volume control signal is detected, the power supply module is controlled to output a power supply voltage matching the volume control signal, so that the volume value of the power amplifier system is adjusted by the volume control signal.
优选地，所述控制所述电源模块输出与所述音量控制信号匹配的电源电压包括：Preferably, the controlling the power supply module to output a power supply voltage that matches the volume control signal includes:
判断所述音量控制信号所调节的音量值是否在预设范围内；judging whether the volume value adjusted by the volume control signal is within a preset range;
若所述音量控制信号所调节的音量值在所述预设范围内，则控制所述电源模块输出与所调节的音量值大小相应的电源电压。If the volume value adjusted by the volume control signal is within the preset range, the power supply module is controlled to output a power supply voltage corresponding to the adjusted volume value.
优选地，所述功放系统还包括用于根据接收的所述音量控制信号对接收的所述音频信号进行调节的音频处理模块；所述控制所述电源模块输出与所述音量控制信号匹配的电源电压还包括：Preferably, the power amplifying system further includes an audio processing module for adjusting the received audio signal according to the received volume control signal; and controlling the power supply module to output a power supply matching the volume control signal Voltage also includes:
当所述音量控制信号所调节的音量值在所述预设范围内时，控制所述音频处理模块不响应所述音量控制信号。When the volume value adjusted by the volume control signal is within the preset range, the audio processing module is controlled not to respond to the volume control signal.
优选地，所述控制所述电源模块输出与所述音量控制信号匹配的电源电压还包括：Preferably, the controlling the power supply module to output a power supply voltage that matches the volume control signal further includes:
当所述音量控制信号所调节的音量值不在所述预设范围，且大于所述预设范围内的所有值时，控制所述电源模块输出对应所述功放模块的最大工作电压，并控制所述音频处理模块响应接收的所述音频控制信号,以使所述功放系统的音量值为所述音量控制信号所调节的音量值。When the volume value adjusted by the volume control signal is not within the preset range and is greater than all values within the preset range, control the power supply module to output the maximum working voltage corresponding to the power amplifier module, and control all The audio processing module responds to the received audio control signal, so that the volume value of the power amplifier system is adjusted by the volume value of the volume control signal.
优选地，所述控制所述电源模块输出与所述音量控制信号匹配的电源电压还包括：Preferably, the controlling the power supply module to output a power supply voltage that matches the volume control signal further includes:
当所述音量控制信号所调节的音量值不在所述预设范围，且小于所述预设范围内的所有值时，控制所述电源模块输出对应所述功放模块的最小工作电压，并控制所述音频处理模块响应接收的所述音频控制信号，以使所述功放系统的音量值为所述音量控制信号所调节的音量值。When the volume value adjusted by the volume control signal is not within the preset range and is smaller than all values within the preset range, control the power supply module to output the minimum operating voltage corresponding to the power amplifier module, and control all The audio processing module responds to the received audio control signal, so that the volume value of the power amplifier system is adjusted by the volume value of the volume control signal.
对应地，本发明还提出一种功放系统的音量调节装置，所述功放系统包括用于对接收的音频信号进行功率放大处理的功放模块、用于为所述功放模块提供工作电压的电源模块及用于输出音量控制信号的音量控制模块；其中，所述功放系统的音量调节装置包括检测模块及电源控制模块；Correspondingly, the present invention also proposes a volume adjustment device for a power amplifier system. The power amplifier system includes a power amplifier module for performing power amplification processing on received audio signals, a power supply module for providing an operating voltage for the power amplifier module, and A volume control module for outputting a volume control signal; wherein, the volume adjustment device of the power amplifier system includes a detection module and a power control module;
所述检测模块，用于检测所述音量控制模块是否输出用于调节功放系统音量值的音量控制信号；The detection module is used to detect whether the volume control module outputs a volume control signal for adjusting the volume value of the power amplifier system;
所述电源控制模块，用于在检测到所述音量控制信号时，控制所述电源模块输出与所述音量控制信号匹配的电源电压，以使所述功放系统的音量值为所述音量控制信号所调节的音量值。The power control module is configured to, when the volume control signal is detected, control the power supply module to output a power supply voltage that matches the volume control signal, so that the volume value of the power amplifier system is the volume control signal The adjusted volume value.
优选地，所述电源控制模块包括第一判断单元及第一电源控制单元；Preferably, the power control module includes a first judging unit and a first power control unit;
所述第一判断单元，用于判断所述音量控制信号所调节的音量值是否在预设范围内；The first judging unit is configured to judge whether the volume value adjusted by the volume control signal is within a preset range;
所述第一电源控制单元，用于在所述音量控制信号所调节的音量值在所述预设范围内时，控制所述电源模块输出与所述调节的音量值大小相应的电源电压，以使所述功放系统的音量值为所述音量控制信号所调节的音量值。The first power control unit is configured to control the power supply module to output a power supply voltage corresponding to the adjusted volume value when the volume value adjusted by the volume control signal is within the preset range, so as to Make the volume value of the power amplifier system the volume value adjusted by the volume control signal.
优选地，所述功放系统还包括用于根据接收的所述音量控制信号对接收的所述音频信号进行调节的音频处理模块；所述电源控制模块还包括开关控制单元；Preferably, the power amplifier system further includes an audio processing module for adjusting the received audio signal according to the received volume control signal; the power control module further includes a switch control unit;
所述开关控制单元，用于在所述音量控制信号所调节的音量值在所述预设范围内时，控制所述音频处理模块不响应接收的所述音量控制信号；在所述音量控制信号所调节的音量值不在所述预设范围内时，控制所述音频处理模块响应接收的所述音量控制信号，以使所述功放系统的音量值为所述音量控制信号所调节的音量值。The switch control unit is configured to control the audio processing module not to respond to the received volume control signal when the volume value adjusted by the volume control signal is within the preset range; When the adjusted volume value is not within the preset range, the audio processing module is controlled to respond to the received volume control signal, so that the volume value of the power amplifier system is the volume value adjusted by the volume control signal.
优选地，所述电源控制模块还包括第二电源控制单元及第三电源控制单元；Preferably, the power control module further includes a second power control unit and a third power control unit;
所述第二电源控制单元，用于在所述检测信号对应的检测值不在所述预设范围，且大于所述预设范围内的所有值时，控制所述电源模块输出对应所述功放模块的最大工作电压；The second power supply control unit is configured to control the power module to output a corresponding power amplifier module when the detection value corresponding to the detection signal is not within the preset range and is greater than all values within the preset range. The maximum working voltage;
所述第三电源控制单元，用于在所述检测信号对应的检测值不在所述预设范围，且小于所述预设范围内的所有值时，控制所述电源模块输出对应所述功放模块的最小工作电压。The third power supply control unit is configured to control the power module to output a corresponding power amplifier module when the detection value corresponding to the detection signal is not within the preset range and is smaller than all values within the preset range. minimum working voltage.
本发明技术方案通过采用根据音量控制信号的大小控制功放系统中电源模块输出相应大小的电源电压的方式，实现对喇叭音量的调节。当音量控制信号所调节的音量值减小时，由于采用现有技术方案会出现“功率放大电路的输入功率不变，而输出功率减小”的情况，而采用本发明技术方案会出现“功放模块的输入功率减小，输出功率也减小”的情况。因此，相较于现有技术，本发明技术方案提高了功放系统的效率。The technical scheme of the present invention realizes the adjustment of the speaker volume by controlling the power supply module in the power amplifier system to output a corresponding power supply voltage according to the volume control signal. When the volume value adjusted by the volume control signal decreases, the situation that "the input power of the power amplifier circuit remains unchanged and the output power decreases" will occur due to the adoption of the prior art scheme, while the "power amplifier module" will appear when the technical scheme of the present invention is adopted. When the input power decreases, the output power also decreases". Therefore, compared with the prior art, the technical solution of the present invention improves the efficiency of the power amplifier system.
附图说明Description of drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative effort.
图1为本发明功放系统的音量调节方法一实施例的流程示意图；Fig. 1 is a schematic flow chart of an embodiment of a volume adjustment method of a power amplifier system of the present invention;
图2为本发明功放系统的音量调节方法另一实施例的流程示意图；Fig. 2 is a schematic flow chart of another embodiment of the volume adjustment method of the power amplifier system of the present invention;
图3为本发明功放系统的音量调节装置一实施例的功能模块示意图；3 is a schematic diagram of functional modules of an embodiment of the volume adjustment device of the power amplifier system of the present invention;
图4为图3中电源控制模块一实施例的功能模块示意图。FIG. 4 is a schematic diagram of functional modules of an embodiment of the power control module in FIG. 3 .
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.
具体实施方式detailed description
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
本发明提出一种功放系统的音量调节方法。其中，功放系统包括用于对接收的音频信号进行功率放大处理的功放模块、用于为功放模块提供工作电压的电源模块及用于输出音量控制信号的音量控制模块。The invention provides a method for adjusting the volume of a power amplifier system. Wherein, the power amplifier system includes a power amplifier module for amplifying the received audio signal, a power supply module for providing working voltage to the power amplifier module, and a volume control module for outputting a volume control signal.
在一实施例中，该功放系统的音量调节方法包括：In one embodiment, the volume adjustment method of the power amplifier system includes:
S100，检测音量控制模块是否输出用于调节功放系统音量值的音量控制信号；S100, detecting whether the volume control module outputs a volume control signal for adjusting the volume value of the power amplifier system;
需要说明的是，音量控制模块可以是旋钮，也可以是遥控器等。当音量控制模块为可调旋钮时，音量控制信号对应的音量值是连续的，当音量控制模块为遥控器时，音量控制信号对应的音量值可以是连续的，也可以是不连续的，此处不对音量控制信号对应的音量值的变化方式进行限制。It should be noted that the volume control module may be a knob, or a remote controller, or the like. When the volume control module is an adjustable knob, the volume value corresponding to the volume control signal is continuous; when the volume control module is a remote controller, the volume value corresponding to the volume control signal can be continuous or discontinuous. There is no restriction on the changing manner of the volume value corresponding to the volume control signal.
S200，若检测到音量控制信号，则控制电源模块输出与音量控制信号匹配的电源电压，以使功放系统的音量值为音量控制信号所调节的音量值。S200. If the volume control signal is detected, control the power supply module to output a power supply voltage matching the volume control signal, so that the volume value of the power amplifier system is adjusted by the volume control signal.
可以通过控制电源模块输出的电源电压的占空比来改变电源模块输出的电源电压的大小；也可以通过控制功放模块的分压值来改变功放模块的供电电压，此处不做限制。The magnitude of the power supply voltage output by the power module can be changed by controlling the duty ratio of the power supply voltage output by the power module; the power supply voltage of the power amplifier module can also be changed by controlling the voltage division value of the power amplifier module, which is not limited here.
当音量控制模块输出音量控制信号时，检测音量控制模块输出的音量控制信号所调节的音量值的大小。而后，根据音量控制信号所调节的音量值的大小控制电源模块输出的电源电压的大小，以使功放模块的功率放大倍数与音量控制信号对应的音量值相匹配，达到功放系统音量调节的目的。值得一提的是，在音量控制信号所调节的音量值由小变大的过程中，电源模块输出的电源电压对应增大；在音量控制信号所调节的音量值由大变小的过程中，电源模块输出的电源电压对应减小。When the volume control module outputs the volume control signal, the volume value adjusted by the volume control signal output by the volume control module is detected. Then, the size of the power supply voltage output by the power supply module is controlled according to the volume value adjusted by the volume control signal, so that the power amplification factor of the power amplifier module matches the volume value corresponding to the volume control signal, so as to achieve the purpose of volume adjustment of the power amplifier system. It is worth mentioning that when the volume value adjusted by the volume control signal changes from small to large, the power supply voltage output by the power module increases correspondingly; when the volume value adjusted by the volume control signal changes from large to small, The power supply voltage output by the power module decreases accordingly.
本发明技术方案通过采用根据音量控制信号所调节的音量值控制功放系统中电源模块输出相应大小的电源电压的方式，实现对喇叭音量的调节。当音量控制信号所调节的音量值减小时，由于采用现有技术会出现“功率放大电路的输入功率不变，而输出功率减小”的情况，而采用本发明技术方案会出现“功放模块的输入功率减小，输出功率也减小”的情况。因此，相较于现有技术，本发明技术方案提高了功放系统的效率。The technical scheme of the present invention realizes the adjustment of the volume of the speaker by controlling the power supply module in the power amplifier system to output a power supply voltage of a corresponding magnitude according to the volume value adjusted by the volume control signal. When the volume value adjusted by the volume control signal decreases, the situation that "the input power of the power amplifier circuit is constant and the output power decreases" will occur due to the adoption of the prior art, but "the When the input power decreases, the output power also decreases". Therefore, compared with the prior art, the technical solution of the present invention improves the efficiency of the power amplifier system.
在一优选实施例中，控制电源模块输出与音量控制信号匹配的电源电压包括：In a preferred embodiment, controlling the power supply module to output a power supply voltage that matches the volume control signal includes:
S210，判断音量控制信号所调节的音量值是否在预设范围内；S210, judging whether the volume value adjusted by the volume control signal is within a preset range;
其中，音量控制信号所调节的音量值可以是连续的，也可以是离散的。Wherein, the volume value adjusted by the volume control signal may be continuous or discrete.
若音量控制信号所调节的音量值是连续的，则可以预先设置第一音量和第二音量阈值。当检测到音量控制信号所调节的音量值在第一音量阈值和第二音量阈值之间时，说明当前音量控制信号所调节的音量值在预设范围内；当检测到音量控制信号所调节的音量值不在第一阈值和第二阈值之间时，说明当前音量控制信号所调节的音量值不在预设范围。其中，第一音量阈值为预设范围内的最大音量值，第二音量阈值为预设范围内的最小音量值。If the volume values adjusted by the volume control signal are continuous, the first volume and the second volume threshold may be preset. When it is detected that the volume value adjusted by the volume control signal is between the first volume threshold and the second volume threshold, it means that the volume value adjusted by the current volume control signal is within the preset range; When the volume value is not between the first threshold and the second threshold, it means that the volume value adjusted by the current volume control signal is not within the preset range. Wherein, the first volume threshold is a maximum volume value within a preset range, and the second volume threshold is a minimum volume value within a preset range.
若音量控制信号所调节的音量值是离散的，则可以预先设置音量值表。当检测到的音量控制信号所调节的音量值可以在音量值表中查找到时，说明当前音量控制信号所调节的音量值在预设范围内；当检测到的音量控制信号所调节的音量值不能在音量值表中查找到时，说明当前音量控制信号所调节的音量值不在预设范围。If the volume value adjusted by the volume control signal is discrete, a volume value table may be preset. When the volume value adjusted by the detected volume control signal can be found in the volume value table, it means that the volume value adjusted by the current volume control signal is within the preset range; when the volume value adjusted by the detected volume control signal If it cannot be found in the volume value table, it means that the volume value adjusted by the current volume control signal is not within the preset range.
S220，若音量控制信号所调节的音量值在预设范围内，则控制电源模块输出与所调节的音量值大小相应的电源电压。S220. If the volume value adjusted by the volume control signal is within a preset range, control the power supply module to output a power supply voltage corresponding to the adjusted volume value.
在对当前音量控制信号所调节的音量值进行判断时，可以通过查找是否存在与当前音量控制信号所调节的音量值相同或相似的预设音量值来判断当前音量控制信号所调节的音量值是否在预设范围内。也可以通过将当前音量控制信号所调节的音量值与预设音量值的上限值及下限值进行比较来判断当前音量控制信号所调节的音量值是否在预设范围内，此处不做限制。When judging the volume value adjusted by the current volume control signal, it can be judged whether the volume value adjusted by the current volume control signal is within the preset range. It is also possible to judge whether the volume value adjusted by the current volume control signal is within the preset range by comparing the volume value adjusted by the current volume control signal with the upper limit and lower limit of the preset volume value, which is not done here limit.
可以理解的是，一方面，在音量控制信号所调节的音量值减小的过程中，电源模块输出的电源电压相应减小，当音量控制信号所调节的音量值减小到一定程度时，电源模块输出的电源电压可能无法开启功放模块。另一方面，在音量控制信号所调节的音量值增大的过程中，电源模块输出的电源电压相应增大，当音量控制信号所调节的音量值增大到最大值时，功放模块的功率放大倍数最大。然而，由于此前输入至功放模块的音频信号并未进行放大处理，因此，该条件下功放模块输出的音量值比当前音量控制信号所调节的音量值小。It can be understood that, on the one hand, in the process of decreasing the volume value adjusted by the volume control signal, the power supply voltage output by the power supply module decreases accordingly. When the volume value adjusted by the volume control signal decreases to a certain extent, the power supply The power supply voltage output by the module may not be able to turn on the power amplifier module. On the other hand, in the process of increasing the volume value adjusted by the volume control signal, the power supply voltage output by the power module increases correspondingly. When the volume value adjusted by the volume control signal increases to the maximum value, the power amplification of the power amplifier module The multiple is the largest. However, since the audio signal previously input to the power amplifier module has not been amplified, the volume value output by the power amplifier module under this condition is smaller than the volume value adjusted by the current volume control signal.
因此，判断音量控制信号所调节的音量值是否在预设范围内；并且在音量控制信号所调节的音量值在预设范围内时，控制电源模块输出相应大小的电源电压，可以避免电源控制模块响应过小或者过大的音量控制控制信号，进而避免在对功放系统音量进行调节的过程中，出现误动作。Therefore, it is judged whether the volume value adjusted by the volume control signal is within the preset range; and when the volume value adjusted by the volume control signal is within the preset range, the power supply module is controlled to output a corresponding power supply voltage, which can avoid the power supply control module Respond to a volume control signal that is too small or too large, thereby avoiding malfunctions in the process of adjusting the volume of the power amplifier system.
进一步地，功放系统还包括用于根据接收的音量控制信号对接收的音频信号进行调节的音频处理模块；上述控制电源模块输出与音量控制信号匹配的电源电压还包括：Further, the power amplifier system also includes an audio processing module for adjusting the received audio signal according to the received volume control signal; the above-mentioned control power supply module outputting a power supply voltage that matches the volume control signal also includes:
S250，当音量控制信号所调节的音量值在预设范围内时，控制音频处理模块不响应接收的音量控制信号。S250. When the volume value adjusted by the volume control signal is within a preset range, control the audio processing module not to respond to the received volume control signal.
可以理解的是，当音量控制信号所调节的音量值在预设范围内时，说明通过控制电源模块输出与音量控制信号匹配的电源电压就可以实现对功放系统输出音量值的调节。此时若控制音频处理模块响应接收的音量控制信号，则不仅会导致电能浪费，还会造成功放系统音量值调节错乱。It can be understood that when the volume value adjusted by the volume control signal is within the preset range, it means that the output volume value of the power amplifier system can be adjusted by controlling the power supply module to output a power supply voltage that matches the volume control signal. At this time, if the audio processing module is controlled to respond to the received volume control signal, it will not only lead to waste of electric energy, but also cause confusion in the adjustment of the volume value of the power amplifier system.
在一较佳实施例中，上述控制电源模块输出与音量控制信号匹配的电源电压还包括：In a preferred embodiment, the above-mentioned control power supply module outputting a power supply voltage that matches the volume control signal further includes:
S260，当音量控制信号所调节的音量值不在预设范围，且大于预设范围内的所有值时，控制电源模块输出对应供方模块的最大工作电压，并控制音频处理模块响应接收的音频控制信号，以使所述功放系统的音量值为所述音量控制信号所调节的音量值。S260. When the volume value adjusted by the volume control signal is not within the preset range and is greater than all values within the preset range, control the power supply module to output the maximum working voltage corresponding to the supplier module, and control the audio processing module to respond to the received audio control signal, so that the volume value of the power amplifier system is the volume value adjusted by the volume control signal.
当检测信号对应的检测值不在预设范围内，且大于预设范围内的所有值时，说明音量控制信号对应的音量值较大，功放模块所需的功率放大倍数也较大。而控制电源模块输出对应功放模块的最大工作电压时功放模块的功率放大倍数最大，满足系统需求。When the detection value corresponding to the detection signal is not within the preset range and is greater than all values within the preset range, it means that the volume value corresponding to the volume control signal is relatively large, and the power amplification factor required by the power amplifier module is also relatively large. When the control power supply module outputs the maximum operating voltage corresponding to the power amplifier module, the power amplification factor of the power amplifier module is the largest, which meets the system requirements.
在一较佳实施例中，上述控制电源模块输出与音量控制信号匹配的电源电压还包括：In a preferred embodiment, the above-mentioned control power supply module outputting a power supply voltage that matches the volume control signal further includes:
S270，当音量控制信号所调节的音量值不在预设范围，且小于预设范围内的所有值时，控制电源模块输出对应功放模块的最小工作电压，并控制音频处理模块响应接收的音频控制信号，以使所述功放系统的音量值为所述音量控制信号所调节的音量值。S270, when the volume value adjusted by the volume control signal is not within the preset range and is less than all values within the preset range, control the power supply module to output the minimum working voltage corresponding to the power amplifier module, and control the audio processing module to respond to the received audio control signal , so that the volume value of the power amplifier system is adjusted by the volume control signal.
当检测信号对应的检测值不在预设范围内，且小于预设范围内的所有值时，说明音量控制信号对应的音量值较小，功放模块所需的功率放大倍数也较小。而控制电源模块输出对应功放模块的最小工作电压时功放模块的功率放大倍数最小，并且可以稳定工作，满足系统的需求。When the detection value corresponding to the detection signal is not within the preset range and is smaller than all values within the preset range, it means that the volume value corresponding to the volume control signal is small, and the power amplification factor required by the power amplifier module is also small. When the power supply module is controlled to output the minimum operating voltage corresponding to the power amplifier module, the power amplification factor of the power amplifier module is the smallest, and it can work stably to meet the requirements of the system.
也就是说，当音量控制信号所调节的音量值大于预设范围内的所有音量值时，控制电源模块输出对应功放模块的最大工作电压，与此同时，音频处理模块根据当前音量控制信号所调节的音量值对输入的音频信号进行对应调整，以使喇叭的音量与音量控制信号所调节的音量值对应。当音量控制信号所调节的音量值小于预设范围内的所有值时，控制电源模块输出对应功放模块的最小工作电压，与此同时，音频处理模块根据当前音量控制信号所调节的音量值对输入的音频信号进行对应调整，以使喇叭的音量与音量控制信号所调节的音量值对应。这样，对于每一个音量控制信号，功放系统都可以输出与该音量控制信号所调节的音量值对应的音量值，达到调节输出音量的目的。且在整个调节过程中，相对于现有技术，提高了功放系统的效率。That is to say, when the volume value adjusted by the volume control signal is greater than all the volume values within the preset range, the power supply module is controlled to output the maximum working voltage of the corresponding power amplifier module. The volume value of the input audio signal is adjusted accordingly, so that the volume of the speaker corresponds to the volume value adjusted by the volume control signal. When the volume value adjusted by the volume control signal is less than all values within the preset range, the control power supply module outputs the minimum operating voltage corresponding to the power amplifier module. correspondingly adjust the audio signal, so that the volume of the speaker corresponds to the volume value adjusted by the volume control signal. In this way, for each volume control signal, the power amplifier system can output a volume value corresponding to the volume value adjusted by the volume control signal, so as to achieve the purpose of adjusting the output volume. And in the whole adjustment process, compared with the prior art, the efficiency of the power amplifier system is improved.
本发明还提出一种功放系统的音量调节装置。其中，功放系统包括用于对接收的音频信号进行功率放大处理的功放模块、用于为功放模块提供工作电压的电源模块及用于输出音量控制信号的音量控制模块。The invention also provides a volume adjustment device for the power amplifier system. Wherein, the power amplifier system includes a power amplifier module for amplifying the received audio signal, a power supply module for providing working voltage to the power amplifier module, and a volume control module for outputting a volume control signal.
在一实施例中，该功放系统的音量调节装置包括检测模块100及电源控制模块200；其中，检测模块100，用于检测音量控制模块是否输出用于调节功放系统音量值的音量控制信号；电源控制模块200，用于在检测到音量控制信号时，控制电源模块输出与音量控制信号匹配的电源电压，以使功放系统的音量值为音量控制信号所调节的音量值。In one embodiment, the volume adjustment device of the power amplifier system includes a detection module 100 and a power control module 200; wherein, the detection module 100 is used to detect whether the volume control module outputs a volume control signal for adjusting the volume value of the power amplifier system; The control module 200 is configured to control the power supply module to output a power supply voltage matching the volume control signal when the volume control signal is detected, so that the volume value of the power amplifier system is adjusted by the volume control signal.
需要说明的是，音量控制模块可以是旋钮，也可以是遥控器等。当音量控制模块为可调旋钮时，音量控制信号所调节的音量值是连续的，当音量控制模块为遥控器时，音量控制信号所调节的音量值可以是连续的，也可以是离散的，此处不对音量控制信号所调节的音量值的变化方式进行限制。检测模块100可以包括比对表，比对表存储有与音量控制信号所调节的音量值对应的预设音量值。电源控制模块200可以包括PWM控制器，通过控制电源模块输出的电源电压的占空比来改变电源模块输出的电源电压的大小；也可以包括分压器，该分压器与功放模块构成分压电路，对于每一个音量控制信号所调节的音量值，分压器都会分得一个对应的电源电压，从而改变功放模块的供电电压，此处不做限制。It should be noted that the volume control module may be a knob, or a remote controller, or the like. When the volume control module is an adjustable knob, the volume value adjusted by the volume control signal is continuous; when the volume control module is a remote controller, the volume value adjusted by the volume control signal can be continuous or discrete, Here, there is no limitation on the changing manner of the volume value adjusted by the volume control signal. The detection module 100 may include a comparison table, and the comparison table stores a preset volume value corresponding to the volume value adjusted by the volume control signal. The power control module 200 can include a PWM controller, which can change the size of the power supply voltage output by the power module by controlling the duty cycle of the power supply voltage output by the power module; it can also include a voltage divider, which forms a voltage divider with the power amplifier module circuit, for each volume value adjusted by the volume control signal, the voltage divider will share a corresponding power supply voltage, thereby changing the power supply voltage of the power amplifier module, which is not limited here.
当检测模块100检测到音量控制模块输出音量控制信号时，电源控制模块200根据当前音量控制信号所调节的音量值对电源电压做出相应调整，以使功放模块的功率放大倍数与当前音量控制信号所调节的音量值对应，达到功放系统音量调节的目的。值得一提的是，在音量控制信号所调节的音量值由小变大的过程中，电源模块输出的电源电压对应增大；在音量控制信号所调节的音量值由大变小的过程中，电源模块输出的电源电压对应减小。When the detection module 100 detects that the volume control module outputs the volume control signal, the power supply control module 200 makes corresponding adjustments to the power supply voltage according to the volume value adjusted by the current volume control signal, so that the power amplification factor of the power amplifier module is consistent with the current volume control signal. The adjusted volume value corresponds to the volume adjustment purpose of the power amplifier system. It is worth mentioning that when the volume value adjusted by the volume control signal changes from small to large, the power supply voltage output by the power module increases correspondingly; when the volume value adjusted by the volume control signal changes from large to small, The power supply voltage output by the power module decreases accordingly.
本发明技术方案通过采用根据音量控制信号所调节的音量值控制功放系统中电源模块输出相应大小的电源电压的方式，实现对喇叭音量的调节。当音量控制信号所调节的音量值减小时，由于采用现有技术会出现“功率放大电路的输入功率不变，而输出功率减小”的情况，而采用本发明技术方案会出现“功放模块的输入功率减小，输出功率也减小”的情况。因此，相较于现有技术，本发明技术方案提高了功放系统的效率。The technical scheme of the present invention realizes the adjustment of the volume of the speaker by controlling the power supply module in the power amplifier system to output a power supply voltage of a corresponding magnitude according to the volume value adjusted by the volume control signal. When the volume value adjusted by the volume control signal decreases, the situation that "the input power of the power amplifier circuit is constant and the output power decreases" will occur due to the adoption of the prior art, but "the When the input power decreases, the output power also decreases". Therefore, compared with the prior art, the technical solution of the present invention improves the efficiency of the power amplifier system.
在一优选实施例中，上述电源控制模块200包括第一判断单元210及第一电源控制单元220；其中，第一判断单元210，用于判断音量控制信号所调节的音量值是否在预设范围内；第一电源控制单元220，用于在音量控制信号所调节的音量值在预设范围内时，控制电源模块输出与音量控制信号所调节的音量值大小相应的电源电压。In a preferred embodiment, the above-mentioned power control module 200 includes a first judging unit 210 and a first power control unit 220; wherein, the first judging unit 210 is used to judge whether the volume value adjusted by the volume control signal is within a preset range Inside; the first power control unit 220 is configured to control the power supply module to output a power supply voltage corresponding to the volume value adjusted by the volume control signal when the volume value adjusted by the volume control signal is within a preset range.
需要说明的是，第一判断单元210可以包括检测表，检测表中存储有检测信号对应的检测值的预设值。在第一判断单元210处于工作状态中时，若检测表中存在与当前音量控制信号所调节的音量值相同或相似的检测值的预设音量值，则判断当前音量控制信号所调节的音量值在预设范围内。第一判断单元210也可以包括比较器，在第一判断单元210处于工作状态中时，若当前音量控制信号所调节的音量值大于比较器的下限值且小于比较器的上限值，则判断当前音量控制信号所调节的音量值在预设范围内。It should be noted that the first judging unit 210 may include a detection table, and the detection table stores preset values of detection values corresponding to detection signals. When the first judging unit 210 is in the working state, if there is a preset volume value with the same or similar detection value as the volume value adjusted by the current volume control signal in the detection table, then determine the volume value adjusted by the current volume control signal within the preset range. The first judging unit 210 may also include a comparator. When the first judging unit 210 is in the working state, if the volume value adjusted by the current volume control signal is greater than the lower limit value of the comparator and smaller than the upper limit value of the comparator, then It is judged that the volume value adjusted by the current volume control signal is within a preset range.
当音量控制模块有音量控制信号输出时，第一判断单元210判断当前音量控制信号所调节的音量值是否在预设范围内，若当前音量控制信号所调节的音量值在预设范围内，则第一电源控制单元220控制电源模块输出与当前音量控制信号相匹配的电源电压。When the volume control module has a volume control signal output, the first judging unit 210 judges whether the volume value adjusted by the current volume control signal is within the preset range, and if the volume value adjusted by the current volume control signal is within the preset range, then The first power control unit 220 controls the power module to output a power voltage that matches the current volume control signal.
可以理解的是，一方面，在音量控制信号所调节的音量值减小的过程中，电源控制模块200控制电源模块输出的电源电压相应减小，当音量控制信号所调节的音量值减小到一定程度时，电源模块输出200的电源电压可能无法开启功放模块。另一方面，在音量控制信号所调节的音量值增大的过程中，电源控制模块200控制电源模块输出的电源电压相应增大，当音量控制信号所调节的音量值增大到最大值时，功放模块的功率放大倍数最大。然而，由于此前输入至功放模块的音频信号并未进行放大处理，因此，该条件下功放模块输出的音量比预设的音量控制信号对应的音量值小。It can be understood that, on the one hand, during the process of decreasing the volume value adjusted by the volume control signal, the power supply control module 200 controls the power supply voltage output by the power module to decrease accordingly. When the volume value adjusted by the volume control signal decreases to To a certain extent, the power supply module may not be able to turn on the power amplifier module by outputting a power supply voltage of 200. On the other hand, in the process of increasing the volume value adjusted by the volume control signal, the power supply control module 200 controls the power supply voltage output by the power module to increase accordingly. When the volume value adjusted by the volume control signal increases to the maximum value, The power amplification factor of the power amplifier module is the largest. However, since the audio signal previously input to the power amplifier module has not been amplified, the volume output by the power amplifier module under this condition is smaller than the volume value corresponding to the preset volume control signal.
因此，设置第一判断单元210和第一电源控制单元220，可以防止电源控制模块200响应过小或者过大的音量控制信号所调节的音量值，进而避免在对功放系统音量进行调节的过程中，出现误动作。Therefore, setting the first judging unit 210 and the first power control unit 220 can prevent the power control module 200 from responding to the volume value adjusted by the volume control signal that is too small or too large, thereby preventing the , a malfunction occurs.
在一较佳实施例中，上述功放系统还包括用于根据接收的音量控制信号对接收的音频信号进行调节的音频处理模块；电源控制模块还包括开关控制单元250；In a preferred embodiment, the above power amplifier system further includes an audio processing module for adjusting the received audio signal according to the received volume control signal; the power control module also includes a switch control unit 250;
开关控制单元250，用于在音量控制信号所调节的音量自在预设范围内时，控制音频处理模块不响应接收的音量控制信号；在音量控制信号所调节的音量值不在预设范围内时，控制音频处理模块响应接收的音量控制信号，以使所述功放系统的音量值为所述音量控制信号所调节的音量值。The switch control unit 250 is used to control the audio processing module not to respond to the received volume control signal when the volume adjusted by the volume control signal is within the preset range; when the volume value adjusted by the volume control signal is not within the preset range, The audio processing module is controlled to respond to the received volume control signal, so that the volume value of the power amplifier system is adjusted by the volume value of the volume control signal.
可以理解的是，当音量控制信号所调节的音量值在预设范围内时，说明通过控制电源模块输出与音量控制信号匹配的电源电压就可以实现对功放系统输出音量值的调节。此时若控制音频处理模块响应接收的音量控制信号，则不仅会导致电能浪费，还会造成功放系统音量值调节错乱。It can be understood that when the volume value adjusted by the volume control signal is within the preset range, it means that the output volume value of the power amplifier system can be adjusted by controlling the power supply module to output a power supply voltage that matches the volume control signal. At this time, if the audio processing module is controlled to respond to the received volume control signal, it will not only lead to waste of electric energy, but also cause confusion in the adjustment of the volume value of the power amplifier system.
当音量控制信号所调节的音量值不在预设范围内时，说明无法通过控制电源模块输出与音量控制信号匹配的电源电压来实现对功放系统输出音量值的调节。此时控制音频处理模块响应接收的音量控制信号，可以实现对供方系统输出音量值的调节。When the volume value adjusted by the volume control signal is not within the preset range, it means that the output volume value of the power amplifier system cannot be adjusted by controlling the power supply module to output a power supply voltage that matches the volume control signal. At this time, the audio processing module is controlled to respond to the received volume control signal, so as to realize the adjustment of the output volume value of the supplier system.
在一较佳实施例中，电源控制模块200还包括第二电源控制单元260及第三电源控制单元270；其中，第二电源控制单元260，用于在检测信号对应的检测值不在预设范围内，且大于预设范围内的所有值时，控制电源模块输出对应功放模块的最大工作电压；第三电源控制单元270，用于在检测信号对应的检测值不在预设范围内，且小于预设范围内的所有值时，控制电源模块输出对应功放模块的最小工作电压。In a preferred embodiment, the power control module 200 further includes a second power control unit 260 and a third power control unit 270; wherein, the second power control unit 260 is used to detect that the detection value corresponding to the detection signal is not within the preset range and is greater than all values within the preset range, control the power supply module to output the maximum working voltage of the corresponding power amplifier module; the third power supply control unit 270 is used to detect when the detection value corresponding to the detection signal is not within the preset range and is less than the preset When all values within the range are set, the control power supply module outputs the minimum working voltage corresponding to the power amplifier module.
需要说明的是，第二电源控制单元260和/或第三电源控制单元270可以是分压器、PWM控制器等，此处不做限制。此外，在对不在预设范围内的检测信号对应的检测值进行处理时，还需要判断当前检测信号对应的检测值是大于预设范围内的所有值，还是小于预设范围内的所有值。因此，本实施例中，第一判断单元210还用于判断检测信号的检测值是否大于所有预设值，或者还用于判断检测信号的检测值是否小于所有预设值，此处不做限制。It should be noted that the second power control unit 260 and/or the third power control unit 270 may be a voltage divider, a PWM controller, etc., which are not limited here. In addition, when processing the detection value corresponding to the detection signal that is not within the preset range, it is also necessary to determine whether the detection value corresponding to the current detection signal is greater than or smaller than all values within the preset range. Therefore, in this embodiment, the first judging unit 210 is also used to judge whether the detection value of the detection signal is greater than all preset values, or is also used to judge whether the detection value of the detection signal is smaller than all preset values, which is not limited here .
也就是说，当音量控制信号所调节的音量值大于预设范围内的所有值时，第二电源控制单元260控制电源模块输出对应功放模块的最大工作电压，与此同时，音频处理模块根据当前音量控制信号对输入的音频信号进行对应调整，以使喇叭的音量与音量控制信号对应的音量值对应。当音量控制信号所调节的音量值小于预设范围内的所有值时，第三电源控制单元270控制电源模块输出对应功放模块的最小工作电压，与此同时，音频处理模块根据当前音量控制信号对输入的音频信号进行对应调整，以使喇叭的音量与音量控制信号对应的音量值对应。这样，对于每一个音量控制信号，都可以实现对功放系统音量的调节。且在整个调节过程中，相对于现有技术，提高了功放系统的效率。That is to say, when the volume value adjusted by the volume control signal is greater than all values within the preset range, the second power supply control unit 260 controls the power supply module to output the maximum working voltage of the corresponding power amplifier module, and at the same time, the audio processing module according to the current The volume control signal adjusts the input audio signal accordingly, so that the volume of the speaker corresponds to the volume value corresponding to the volume control signal. When the volume value adjusted by the volume control signal is less than all the values within the preset range, the third power supply control unit 270 controls the power supply module to output the minimum operating voltage of the corresponding power amplifier module. At the same time, the audio processing module The input audio signal is correspondingly adjusted so that the volume of the speaker corresponds to the volume value corresponding to the volume control signal. In this way, for each volume control signal, the volume of the power amplifier system can be adjusted. And in the whole adjustment process, compared with the prior art, the efficiency of the power amplifier system is improved.
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是在本发明的发明构思下，利用本发明说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本发明的专利保护范围内。The above is only a preferred embodiment of the present invention, and does not therefore limit the patent scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformation made by using the description of the present invention and the contents of the accompanying drawings, or direct/indirect use All other relevant technical fields are included in the patent protection scope of the present invention.
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