技术领域technical field
本实用新型涉及通信技术领域，尤其涉及一种扬声器补偿系统及便携式移动终端。The utility model relates to the technical field of communication, in particular to a loudspeaker compensation system and a portable mobile terminal.
背景技术Background technique
移动终端从最初的厚度为3.5毫米发展到现在的厚度为2毫米，超薄是现有的移动终端的发展趋势，移动终端的厚度往往是由移动终端的屏幕、背板以及电池三者决定，因电池尺寸相对较小，故通常将移动终端的扬声器安装在电池的延伸方向上。因移动终端越来越薄，则要求扬声器的厚度也越来越薄。例如现有的一种扬声器，主要由线圈、振膜和磁铁组成，振膜与线圈一体连接，磁铁提供磁场，根据电磁感应定律，通电线圈在磁场中做反向切割磁力线运动，线圈就会带动振膜振动，振膜从而带动空气振动形成声音。但是扬声器越来越薄，则磁铁就越来越小，磁铁形成的有效磁场面积则会减小，有效磁场面积减少在中高频信号的传输过程中损失较小，但在低频信号中，则易出现信号失真或者无法发音的现象，因而低频信号的行程较长(频率越高，行程越短)，该行程长度可能会超过磁铁形成有效磁场面积，对于超过有效磁场面积的行程无法做切割磁力线运动，进而导致信号失真或者不发音的现象发生。进而导致移动终端播放的音质较差，尤其是低频音质效果较低。Mobile terminals have developed from an initial thickness of 3.5 mm to the current thickness of 2 mm. Ultra-thin is the development trend of existing mobile terminals. The thickness of mobile terminals is often determined by the screen, backplane and battery of the mobile terminal. Because the size of the battery is relatively small, the speaker of the mobile terminal is usually installed in the extending direction of the battery. As the mobile terminal becomes thinner and thinner, the thickness of the speaker is required to be thinner and thinner. For example, an existing loudspeaker is mainly composed of a coil, a diaphragm and a magnet. The diaphragm vibrates, and the diaphragm drives the air to vibrate to form sound. However, as the speaker becomes thinner and thinner, the magnet will become smaller and smaller, and the effective magnetic field area formed by the magnet will decrease. The reduction in the effective magnetic field area will cause less loss during the transmission of medium and high frequency signals, but in low frequency signals, it will be easy The phenomenon of signal distortion or inability to pronounce sounds occurs, so the stroke of the low-frequency signal is longer (the higher the frequency, the shorter the stroke), the stroke length may exceed the effective magnetic field area formed by the magnet, and the cutting magnetic field line movement cannot be performed for the stroke exceeding the effective magnetic field area , resulting in signal distortion or silence. As a result, the sound quality played by the mobile terminal is poor, especially the low-frequency sound quality effect is low.
现有技术通常采用两种方式：第一种技术方案是：于扬声器前端设置一功率放大电路，用以对低频信号进行放大，但是此种方法仅仅只有对低频信号放大的作用，而放大后的低频信号是否出现失真或者其他现象，该技术方案无法解决。第二种技术方案是在前述方案的基础上设置一传感器，传感器采集检测扬声器的等效电阻大小，并进行前置补偿，但是此种方式失真还是很大。The prior art generally adopts two methods: the first technical solution is to set a power amplifier circuit at the front end of the loudspeaker to amplify the low-frequency signal, but this method only has the function of amplifying the low-frequency signal, and the amplified Whether there is distortion or other phenomena in the low-frequency signal, this technical solution cannot solve it. The second technical solution is to set a sensor on the basis of the above-mentioned solution, and the sensor collects and detects the equivalent resistance of the loudspeaker, and performs pre-compensation, but the distortion is still very large in this way.
实用新型内容Utility model content
本实用新型的主要目的在于提供一种扬声器补偿系统及便携式移动终端，旨在提高扬声器输出的音频信号的音质。The main purpose of the utility model is to provide a loudspeaker compensation system and a portable mobile terminal, aiming at improving the sound quality of the audio signal output by the loudspeaker.
一种扬声器补偿系统，应用于移动终端设备，其特征在于：包括A loudspeaker compensation system applied to mobile terminal equipment, characterized in that: comprising
扬声器，用以播放音频信号；a loudspeaker for playing audio signals;
麦克风，沿所述扬声器出音方向设置，用以检测所述扬声器播出的所述音频信号，并形成一播音信号输出；A microphone, arranged along the sound output direction of the speaker, is used to detect the audio signal played by the speaker, and form a broadcast signal output;
比较单元，第一输入端连接一音频装置输出端，第二输入端连接所述麦克风的输出端，用以分别接收所述音频输出端输出的标准语音信号和所述麦克风输出的所述播音信号，并根据所述标准语音信号和所述播音信号形成一比较结果输出；A comparison unit, the first input end is connected to an audio device output end, and the second input end is connected to the output end of the microphone, for receiving the standard voice signal output by the audio output end and the broadcast signal output by the microphone respectively , and form a comparison result output according to the standard voice signal and the broadcast signal;
功率放大器，连接所述比较单元，用以接收所述比较单元输出的所述比较结果，并根据所述比较结果形成一补偿信号通过输出端输出至所述扬声器。The power amplifier is connected to the comparison unit, and is used for receiving the comparison result output by the comparison unit, and forming a compensation signal according to the comparison result and outputting it to the speaker through an output terminal.
上述的扬声器补偿系统，其中，还包括一声学腔体，设置于于所述扬声器的出音方向设置并封闭所述扬声器，所述声学腔体用以结合所述扬声器形成所述扬声器的音腔，其中所述麦克风设置于所述声学腔体靠近所述扬声器的一侧。The above loudspeaker compensation system further includes an acoustic cavity, which is arranged in the sound output direction of the speaker and closes the speaker, and the acoustic cavity is used to combine with the speaker to form the sound cavity of the speaker , wherein the microphone is disposed on a side of the acoustic cavity close to the speaker.
上述的扬声器补偿系统，其中，所述麦克风与所述扬声器之间设有一预定间隔。In the above loudspeaker compensation system, there is a predetermined distance between the microphone and the loudspeaker.
上述的扬声器补偿系统，其中，所述麦克风与所述扬声器之间间隔距离为1毫米～3毫米。In the above loudspeaker compensation system, the distance between the microphone and the loudspeaker is 1 mm to 3 mm.
上述的扬声器补偿系统，其中，还包括低通滤波器，连接于所述麦克风的输出端与所述比较单元之间，用以滤除所述麦克风输出的所述播音信号中的高频信号，并将经滤波处理后的所述播音信号输出至所述比较单元。The above loudspeaker compensation system, further comprising a low-pass filter connected between the output terminal of the microphone and the comparison unit, to filter out high-frequency signals in the broadcast signal output by the microphone, and output the broadcast signal after filtering to the comparison unit.
上述的扬声器补偿系统，其中，所述低通滤波器的带宽范围为300HZ～400KHZ。In the speaker compensation system mentioned above, the bandwidth range of the low-pass filter is 300HZ-400KHZ.
上述的扬声器补偿系统，其中，于所述音腔上开设一收音孔，使得所述麦克风的振膜对准所述收音孔。In the above loudspeaker compensation system, a sound receiving hole is opened on the sound chamber so that the diaphragm of the microphone is aligned with the sound receiving hole.
本实用新型同时提供一种便携式移动终端，其中，具有上述任意一项所述的扬声器补偿系统。The utility model also provides a portable mobile terminal, which has the loudspeaker compensation system described in any one of the above items.
与现有技术相比，本实用新型的优点是：Compared with the prior art, the utility model has the advantages of:
通过在扬声器的出音方向设置一个采集扬声器播出声音的麦克风，并形成播音信号反馈至比较单元，比较单元根据标准语音信号判断扬声器输出的语音信号是否有失真，并形成一比较结果输出。功率放大器根据所述比较结果形成一补偿信号通过输出端输出至所述扬声器。采用此种方式，对扬声器输出的声音进行检测并形成反馈信号，并对反馈信号进行比较获得比较结果，功率放大器根据比较结果输出补偿信号补偿扬声器输出的信号，提高移动终端输出音频信号的音质。By setting a microphone in the sound output direction of the speaker to collect the sound played by the speaker, and forming a broadcast signal to feed back to the comparison unit, the comparison unit judges whether the voice signal output by the speaker is distorted according to the standard voice signal, and forms a comparison result to output. The power amplifier forms a compensation signal according to the comparison result and outputs it to the speaker through the output terminal. In this way, the sound output by the speaker is detected to form a feedback signal, and the feedback signal is compared to obtain a comparison result. The power amplifier outputs a compensation signal to compensate the signal output by the speaker according to the comparison result, thereby improving the sound quality of the audio signal output by the mobile terminal.
附图说明Description of drawings
图1为本实用新型的扬声器补偿系统的结构示意图。Fig. 1 is a structural schematic diagram of the loudspeaker compensation system of the present invention.
具体实施方式Detailed ways
下面结合附图和具体实施例对本实用新型作进一步说明，但不作为本实用新型的限定。The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the utility model.
下面将结合本实用新型实施例中的附图，对本实用新型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实用新型一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，本领域普通技术人员在没有作出创造性劳动的前提下所获得的所有其他实施例，都属于本实用新型保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with 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. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.
需要说明的是，在不冲突的情况下，本实用新型中的实施例及实施例中的特征可以相互组合。It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
下面结合附图和具体实施例对本实用新型作进一步说明，但不作为本实用新型的限定。The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the utility model.
如图1所示，一种扬声器补偿系统，应用于移动终端设备，其中：包括As shown in Figure 1, a loudspeaker compensation system is applied to mobile terminal equipment, including:
扬声器，用以播放音频信号；a loudspeaker for playing audio signals;
麦克风，沿所述扬声器出音方向设置，用以检测所述扬声器播出的所述音频信号，并形成一播音信号输出；A microphone, arranged along the sound output direction of the speaker, is used to detect the audio signal played by the speaker, and form a broadcast signal output;
比较单元，第一输入端连接一音频装置输出端，第二输入端连接所述麦克风的输出端，用以分别接收所述音频输出端输出的标准语音信号和所述麦克风输出的所述播音信号，并根据所述标准语音信号和所述播音信号形成一比较结果输出；A comparison unit, the first input end is connected to an audio device output end, and the second input end is connected to the output end of the microphone, for receiving the standard voice signal output by the audio output end and the broadcast signal output by the microphone respectively , and form a comparison result output according to the standard voice signal and the broadcast signal;
功率放大器，连接所述比较单元，用以接收所述比较单元输出的所述比较结果，并根据所述比较结果形成一补偿信号通过输出端输出至所述扬声器。The power amplifier is connected to the comparison unit, and is used for receiving the comparison result output by the comparison unit, and forming a compensation signal according to the comparison result and outputting it to the speaker through an output terminal.
本实用新型的工作原理是：通过在扬声器的出音方向设置一个采集扬声器播出声音的麦克风，并形成播音信号反馈至比较单元，比较单元根据标准语音信号判断扬声器输出的语音信号是否有失真，并形成一比较结果输出。功率放大器根据所述比较结果形成一补偿信号通过输出端输出至所述扬声器。采用此种方式，对扬声器输出的声音进行检测并形成反馈信号，并对反馈信号进行比较获得比较结果，功率放大器根据比较结果输出补偿信号补偿扬声器输出的信号，提高移动终端输出音频信号的音质。移动终端可为通信移动终端(如手机)、平板电脑、音乐播放器、笔记本电脑等等。The working principle of the utility model is: by setting a microphone in the sound output direction of the loudspeaker to collect the sound played by the loudspeaker, and forming a broadcast signal to feed back to the comparison unit, the comparison unit judges whether the voice signal output by the loudspeaker is distorted according to the standard voice signal, And form a comparison result output. The power amplifier forms a compensation signal according to the comparison result and outputs it to the speaker through the output terminal. In this way, the sound output by the speaker is detected to form a feedback signal, and the feedback signal is compared to obtain a comparison result. The power amplifier outputs a compensation signal to compensate the signal output by the speaker according to the comparison result, thereby improving the sound quality of the audio signal output by the mobile terminal. The mobile terminal can be a communication mobile terminal (such as a mobile phone), a tablet computer, a music player, a notebook computer, and the like.
其中，本发明中，也可以将音频装置连接功率放大器，此种方式下，音频装置输出两路信号，一路信号传输至功率放大器，一路信号作为标准语音信号传输至比较单元。Wherein, in the present invention, the audio device can also be connected to the power amplifier. In this way, the audio device outputs two signals, one signal is transmitted to the power amplifier, and one signal is transmitted to the comparison unit as a standard voice signal.
作为进一步优选实施方案，上述的扬声器补偿系统，其中，还包括一声学腔体，设置于于所述扬声器的出音方向设置并封闭所述扬声器，所述声学腔体用以结合所述扬声器形成所述扬声器的音腔，其中所述麦克风设置于所述声学腔体靠近所述扬声器的一侧。As a further preferred embodiment, the above-mentioned speaker compensation system also includes an acoustic cavity, which is arranged in the sound output direction of the speaker and closes the speaker, and the acoustic cavity is used to combine with the speaker to form a The sound cavity of the speaker, wherein the microphone is arranged on a side of the acoustic cavity close to the speaker.
作为进一步优选实施方案，上述的扬声器补偿系统，其中，所述麦克风与所述扬声器之间设有一预定间隔。通常预定间隔越短越好，因为间隔越短，麦克风采集的扬声器输出的声音的衰减较小，失真较小，提高了功率放大器比较的准确度，提高了功率放大器输出补偿信号的准确度，同时因距离较短，麦克风反馈播音信号的迟延时间短，能够及时对扬声器输出的语音信号进行补偿，提高了语音信号补偿的效率，进一步提高了移动终端输出的语音信号的音质。As a further preferred implementation, in the above loudspeaker compensation system, there is a predetermined interval between the microphone and the loudspeaker. Usually the shorter the predetermined interval, the better, because the shorter the interval, the smaller the attenuation and distortion of the sound output by the speaker collected by the microphone, which improves the accuracy of the power amplifier comparison and the accuracy of the power amplifier output compensation signal. Due to the short distance, the delay time of the microphone feedback broadcast signal is short, and the voice signal output by the speaker can be compensated in time, which improves the efficiency of voice signal compensation and further improves the sound quality of the voice signal output by the mobile terminal.
作为进一步优选实施方案，上述的扬声器补偿系统，其中，所述麦克风与所述扬声器之间间隔距离为1毫米～3毫米。声音在空气中的传播速度为340m/s，当麦克风与扬声器之间的间隔为3毫米时，麦克风反馈的播音信号的迟延为8.7微秒，在语音信号传输中，即相当于扬声器补偿系统可以为8.7微秒后的语音信号进行补偿，通常在语音传输过程中，迟延8.7微秒为中低频的语音信号传输损失较小，当麦克风与扬声器之间的间隔低于3毫米时，其补偿的准确度更高。As a further preferred implementation, in the speaker compensation system above, the distance between the microphone and the speaker is 1 mm to 3 mm. The propagation speed of sound in the air is 340m/s. When the distance between the microphone and the speaker is 3 mm, the delay of the broadcast signal fed back by the microphone is 8.7 microseconds. In the transmission of voice signals, it is equivalent to that the speaker compensation system can Compensate for the voice signal after 8.7 microseconds. Usually, in the process of voice transmission, the delay of 8.7 microseconds is the transmission loss of low- and medium-frequency voice signals. When the distance between the microphone and the speaker is less than 3 mm, its compensation The accuracy is higher.
作为进一步优选实施方案，上述的扬声器补偿系统，其中，还包括低通滤波器，连接于所述麦克风的输出端与所述比较单元之间，用以滤除所述麦克风输出的所述播音信号中的高频信号，并将经滤波处理后的所述播音信号输出至所述比较单元。高频信号的频率较快，传输过程较短，因此对高频信号的补偿没有意义(当补偿信号输出时，高频信号可能已经播音完毕)，因此采用低通滤波器滤波高频信号，滤除高频信号，仅仅保留人耳较为敏感的中低频信号，降低比较单元的运算复杂度，提高了比较单元的运算效率，间接提高了信号补偿的准确性和及时性。As a further preferred implementation, the above-mentioned loudspeaker compensation system further includes a low-pass filter connected between the output terminal of the microphone and the comparison unit to filter out the broadcast signal output by the microphone and output the filtered broadcast signal to the comparison unit. The frequency of the high-frequency signal is faster, and the transmission process is shorter, so the compensation for the high-frequency signal is meaningless (when the compensation signal is output, the high-frequency signal may have been broadcast), so a low-pass filter is used to filter the high-frequency signal. In addition to high-frequency signals, only the middle and low-frequency signals that are sensitive to the human ear are retained, which reduces the computational complexity of the comparison unit, improves the computational efficiency of the comparison unit, and indirectly improves the accuracy and timeliness of signal compensation.
作为进一步优选实施方案，上述的扬声器补偿系统，其中，所述低通滤波器的带宽范围为300HZ～400KHZ。频率为300HZ～400KHZ的音频信号为人耳较敏感的声波频率。仅仅对300HZ～400KHZ的音频信号进行比较补偿，进一步提高了比较单元的运算效率。As a further preferred implementation, in the speaker compensation system above, the low-pass filter has a bandwidth ranging from 300HZ to 400KHZ. The audio signal with a frequency of 300HZ ~ 400KHZ is the sound wave frequency to which the human ear is more sensitive. Comparing and compensating only the audio signal of 300HZ-400KHZ further improves the computing efficiency of the comparing unit.
作为进一步优选实施方案，上述的扬声器补偿系统，其中，于所述音腔上开设一收音孔，使得所述麦克风的振膜对准所述收音孔。能够提高麦克风采集音频信号的信噪比。进一步提高了信号补偿的准确性。As a further preferred implementation, in the speaker compensation system above, a sound receiving hole is opened on the sound chamber so that the diaphragm of the microphone is aligned with the sound receiving hole. The signal-to-noise ratio of the audio signal collected by the microphone can be improved. The accuracy of signal compensation is further improved.
本实用新型同时提出一种便携式移动终端，其中，具有上述任意一项所述的扬声器补偿系统。该扬声器补偿系统中的扬声器可由便携式移动终端自身扬声器形成，其工作原理如上所述，此处不做赘述。The utility model also proposes a portable mobile terminal, which has the loudspeaker compensation system described in any one of the above items. The loudspeaker in the loudspeaker compensation system can be formed by the portable mobile terminal's own loudspeaker, and its working principle is as described above, which will not be repeated here.
以上所述仅为本实用新型较佳的实施例，并非因此限制本实用新型的实施方式及保护范围，对于本领域技术人员而言，应当能够意识到凡运用本实用新型说明书及图示内容所作出的等同替换和显而易见的变化所得到的方案，均应当包含在本实用新型的保护范围内。The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the implementation and protection scope of the present utility model. For those skilled in the art, they should be aware The schemes obtained by making equivalent replacements and obvious changes shall all be included in the protection scope of the present utility model.
| Application Number | Priority Date | Filing Date | Title |
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| CN201520153116.9UCN204578757U (en) | 2015-03-17 | 2015-03-17 | Speaker compensation system and portable mobile termianl |
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| CN201520153116.9UCN204578757U (en) | 2015-03-17 | 2015-03-17 | Speaker compensation system and portable mobile termianl |
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| CN204578757Utrue CN204578757U (en) | 2015-08-19 |
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| CN201520153116.9UExpired - LifetimeCN204578757U (en) | 2015-03-17 | 2015-03-17 | Speaker compensation system and portable mobile termianl |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105187602A (en)* | 2015-09-06 | 2015-12-23 | 广东欧珀移动通信有限公司 | Terminal volume adjustment method and device |
| CN106034272A (en)* | 2015-03-17 | 2016-10-19 | 钰太芯微电子科技（上海）有限公司 | Loudspeaker compensation system and portable mobile terminal |
| CN106612479A (en)* | 2015-10-23 | 2017-05-03 | 钰太芯微电子科技（上海）有限公司 | Loudspeaker based protective circuit |
| CN107613430A (en)* | 2017-08-02 | 2018-01-19 | 深圳天珑无线科技有限公司 | A kind of speaker circuit and mobile terminal |
| CN107920314A (en)* | 2016-10-05 | 2018-04-17 | 王永明 | A multi-unit digital loudspeaker |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106034272A (en)* | 2015-03-17 | 2016-10-19 | 钰太芯微电子科技（上海）有限公司 | Loudspeaker compensation system and portable mobile terminal |
| CN105187602A (en)* | 2015-09-06 | 2015-12-23 | 广东欧珀移动通信有限公司 | Terminal volume adjustment method and device |
| CN105187602B (en)* | 2015-09-06 | 2018-05-04 | 广东欧珀移动通信有限公司 | A kind of adjusting method and device of terminal volume |
| CN106612479A (en)* | 2015-10-23 | 2017-05-03 | 钰太芯微电子科技（上海）有限公司 | Loudspeaker based protective circuit |
| CN107920314A (en)* | 2016-10-05 | 2018-04-17 | 王永明 | A multi-unit digital loudspeaker |
| CN107613430A (en)* | 2017-08-02 | 2018-01-19 | 深圳天珑无线科技有限公司 | A kind of speaker circuit and mobile terminal |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | Granted publication date:20150819 | |
| CX01 | Expiry of patent term |