CN104158943A - Audio optimization circuit - Google Patents

Abstract

The present invention provides an audio optimization circuit comprising an audio input device and an audio output device, the audio input device is connected with a loudspeaker through a first audio amplification circuit, the loudspeaker outputs voice signals received from another terminal equipment to a user, and the audio output device receives the voice signals from the user and uploads the signals to a mobile communication network through a second audio amplification circuit, and transmits the signals to another terminal equipment through the mobile communication network. The present invention compensates power of audio signals input into the audio input device and audio signals output from the audio output device via a compensation circuit, automatically adjusts volume of input and output audio signals according to a volume difference value between the received and output audio signals, makes users have comfortable call experiences, and is able to eliminate the configuration of volume buttons, and further improves the compactness and aesthetic property of mobile phones; and a filter and optimization module amplifies and attenuates audio signals of master and slave MICs, greatly reducing the transmission rate of ambient noises.

Description

A kind of audio optimization circuit

Technical field

The present invention relates to electronic applications, refer to especially a kind of audio optimization circuit.

Background technology

The appearance of mobile phone has changed the mankind's live and work custom, and in April, 1973, the Engineering Technician Martin of the Motorola Inc. storehouse handkerchief of famous American is developed U.S.'s First and pushed civilian mobile phone to, and therefore, Martin storehouse handkerchief is also referred to as the father of modern mobile phone.

Existing mobile phone is divided into smart mobile phone and non intelligent mobile phone, and the non intelligent mobile phone of Performance Ratio of general intelligence mobile phone is good, but non intelligent mobile phone is more stable than smart mobile phone, and most of non intelligent mobile phones and smart mobile phone are used the CPU of Britain ARM corporate structure.The dominant frequency of smart mobile phone is higher, and the speed of service is fast, and smart mobile phone handling procedure task is quicker, daily more convenient, but not the dominant frequency of smart mobile phone is lower, and the speed of service is also slow.

No matter be smart mobile phone or non intelligent mobile phone, the control of its volume is mainly that smart mobile phone is realized volume adjusting by real key or touch-screen virtual key by manually realizing the adjusting of volume, and non intelligent mobile phone regulates volume by real key, at present, also do not have the mobile phone of automatic regulating volume to occur.And its tonequality of existing mobile phone is all accomplished the effect of high-fidelity as far as possible, i.e. former sound transmission, but for noisy occasions such as public transport, markets, the user of the other end often audibility is very poor, and user experiences greatly and reduces.

Summary of the invention

The present invention proposes a kind of audio optimization circuit, has solved in prior art by button and has realized volume adjusting and noise by the problem of synchronous transmission.

Technical scheme of the present invention is achieved in that

A kind of audio optimization circuit, comprise: voice input device and audio output device, described voice input device is connected to loud speaker by the first audio amplifier circuit, the voice signal of another terminal equipment that loud speaker receives to user's output, audio output device receives user's voice signal and it is uploaded to mobile communications network by the second audio amplifier circuit, by mobile communications network, is transferred to another terminal equipment;

Described voice input device is also connected to the first sample circuit, and the first sample circuit gathers the volume value of voice input device and is converted into corresponding the first magnitude of voltage;

Described audio output device is connected to the second sample circuit, and the second sample circuit gathers the volume value of audio output device and is converted into corresponding second voltage value;

The first comparator is hysteresis comparator, the first magnitude of voltage and second voltage value compared, and when the difference of the first magnitude of voltage and second voltage value exceeds preset range, the first comparator output difference threshold voltage;

Select circuit, be connected to the output of described the first comparator and receive described difference voltage, selecting the output of circuit is two, exports respectively on the occasion of voltage and negative value voltage;

The first compensating circuit and the second compensating circuit are on-off controller, the first compensating circuit be connected to described selection circuit on the occasion of voltage output end, the second compensating circuit is connected to the negative value voltage output end of described selection circuit, according to the adjustable pulse signal of described difference voltage output duty cycle, control respectively turning on and off of switching tube in the first audio amplifier circuit and the second audio amplifier circuit, regulation output is to the power of loud speaker and mobile communications network;

Between described audio output device and the second audio amplifier circuit, also comprise filtering and optimize module;

Described audio output device comprises:.

Be arranged on the main MIC of mobile phone front below and be arranged on top, the mobile phone back side from MIC;

Filtering and optimization module comprise the first subfilter, the second subfilter and senior filter; The first subfilter is processed main MIC voice data information, and output state is estimated x1 and estimation error covariance matrix p1; The second subfilter is processed from MIC voice data information, and output state is estimated x2 and estimation error covariance matrix p2; Described state estimation x1, x2 and estimation error covariance matrix p1, p2 delivers to senior filter, and by formula (1) and formula (2), merges together with the state estimation of senior filter, obtains global optimum and estimates and covariance matrix:

${\hat{x}}_g=p_g\left(\underset{i=1}{\overset{2}{\mathrm{\Σ}}}{p}_i^{-1}{\hat{x}}_i\right)---\left(1\right)$

$p_g=\underset{i=1}{\overset{2}{\mathrm{\Σ}}}{p}_i^{-1}---\left(2\right)$

In formula, i=1,2;

The optimal estimation value of senior filter is reset to the state estimation of 2 subfilters,

${\hat{x}}_i={\hat{x}}_g---\left(3\right)$

$p_i={\mathrm{\β}}_i^{-1}{p}_g---\left(4\right)$

Using main MIC voice data information as analyzing datum quantity, automatically adjust the size of p value, concrete adaptive algorithm is:

β ₁, β ₂meet β ₁+ β ₂=1 (5)

${\mathrm{\β}}_1=\left\{\begin{array}{c}0.99,p\≤2\\ 2/p,2\≤p\≤5\\ 1/p,5\≤p\≤10\\ 2/p,p\≥10\end{array}\right.---\left(6\right)$

Described the second audio amplifier circuit receives described filtering and optimizes the output signal of module, and the audio signal after optimizing is sent to another mobile reception end by mobile communications network.

The invention has the beneficial effects as follows:

By compensating circuit, to being input to the audio signal of the audio signal of voice input device and audio output device output, carry out power back-off, according to the volume difference of the audio signal that receives and export, automatically regulate the volume of input and output audio signal, make user's call experience comfortable, and the setting that can omit volume key, further improve compactedness and the aesthetic property of mobile phone; By filtering and optimization module, to main MIC with from the audio signal of MIC, amplify and decay, greatly reduce the transfer rate of environmental noise, improve user's the experience of listening to.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the control block diagram of audio optimization circuit of the present invention;

Fig. 2 is filtering of the present invention and the control block diagram of optimizing module.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.

As shown in Figure 1, audio optimization circuit of the present invention, comprise: voice input device 100 and audio output device 400, described voice input device is connected to loud speaker 800 by the first audio amplifier circuit 700, the voice signal of another terminal equipment that loud speaker receives to user's output, audio output device 400 receives user's voice signal and it is uploaded to mobile communications network 810 by the second audio amplifier circuit 710, by mobile communications network, is transferred to another terminal equipment.

Described voice input device is also connected to the first sample circuit 200, the first sample circuits and gathers the volume value of voice input device and be converted into corresponding the first magnitude of voltage; Described audio output device is connected to the second sample circuit 300, the second sample circuits and gathers the volume value of audio output device and be converted into corresponding second voltage value.

The first comparator 500 is hysteresis comparator, the first magnitude of voltage and second voltage value compared, and when the difference of the first magnitude of voltage and second voltage value exceeds preset range, the first comparator output difference threshold voltage.Select circuit 510, be connected to the output of described the first comparator and receive described difference voltage, selecting the output of circuit is two, exports respectively on the occasion of voltage and negative value voltage.

The first compensating circuit 600 and the second compensating circuit 610 are on-off controller, the first compensating circuit be connected to described selection circuit on the occasion of voltage output end, the second compensating circuit is connected to the negative value voltage output end of described selection circuit, according to the adjustable pulse signal of described difference voltage output duty cycle, control respectively turning on and off of switching tube in the first audio amplifier circuit 700 and the second audio amplifier circuit 710, regulation output is to the power of loud speaker and mobile communications network.

As depicted in figs. 1 and 2, between described audio output device 400 and the second audio amplifier circuit 710, also comprise filtering and optimize module 130; Audio output device 400 of the present invention, comprising: be arranged on the main MIC 110 of mobile phone front below and be arranged on top, the mobile phone back side from MIC 120.

Filtering and optimization module 130 comprise the first subfilter 1311, the second subfilter 1312 and senior filter 1314; The first subfilter is processed main MIC voice data information, and output state is estimated x1 and estimation error covariance matrix p1; The second subfilter is processed from MIC voice data information, and output state is estimated x2 and estimation error covariance matrix p2; Described state estimation x1, x2 and estimation error covariance matrix p1, p2 delivers to senior filter, and by formula (1) and formula (2), merges together with the state estimation of senior filter, obtains global optimum and estimates and covariance matrix:

${\hat{x}}_g=p_g\left(\underset{i=1}{\overset{2}{\mathrm{\Σ}}}{p}_i^{-1}{\hat{x}}_i\right)---\left(1\right)$

$p_g=\underset{i=1}{\overset{2}{\mathrm{\Σ}}}{p}_i^{-1}---\left(2\right)$

In formula, i=1,2;

The optimal estimation value of senior filter is reset to the state estimation of 2 subfilters,

${\hat{x}}_i={\hat{x}}_g---\left(3\right)$

$p_i={\mathrm{\β}}_i^{-1}{p}_g---\left(4\right)$

Using main MIC voice data information as analyzing datum quantity, automatically adjust the size of p value, concrete adaptive algorithm is:

β ₁, β ₂meet β ₁+ β ₂=1 (5)

${\mathrm{\β}}_1=\left\{\begin{array}{c}0.99,p\≤2\\ 2/p,2\≤p\≤5\\ 1/p,5\≤p\≤10\\ 2/p,p\≥10\end{array}\right.---\left(6\right)$

Described the second audio amplifier circuit receives described filtering and optimizes the output signal of module, and the audio signal after optimizing is sent to another mobile reception end by mobile communications network.

The present invention carries out power back-off by compensating circuit to being input to the audio signal of the audio signal of voice input device and audio output device output, according to the volume difference of the audio signal that receives and export, automatically regulate the volume of input and output audio signal, make user's call experience comfortable, and the setting that can omit volume key, further improve compactedness and the aesthetic property of mobile phone; By filtering and optimization module, to main MIC with from the audio signal of MIC, amplify and decay, greatly reduce the transfer rate of environmental noise, improve user's the experience of listening to.

The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (1)

1. an audio optimization circuit, comprise: voice input device and audio output device, described voice input device is connected to loud speaker by the first audio amplifier circuit, the voice signal of another terminal equipment that loud speaker receives to user's output, audio output device receives user's voice signal and it is uploaded to mobile communications network by the second audio amplifier circuit, by mobile communications network, be transferred to another terminal equipment, it is characterized in that

Described voice input device is also connected to the first sample circuit, and the first sample circuit gathers the volume value of voice input device and is converted into corresponding the first magnitude of voltage;

Described audio output device is connected to the second sample circuit, and the second sample circuit gathers the volume value of audio output device and is converted into corresponding second voltage value;

The first comparator is hysteresis comparator, the first magnitude of voltage and second voltage value compared, and when the difference of the first magnitude of voltage and second voltage value exceeds preset range, the first comparator output difference threshold voltage;

Select circuit, be connected to the output of described the first comparator and receive described difference voltage, selecting the output of circuit is two, exports respectively on the occasion of voltage and negative value voltage;

The first compensating circuit and the second compensating circuit are on-off controller, the first compensating circuit be connected to described selection circuit on the occasion of voltage output end, the second compensating circuit is connected to the negative value voltage output end of described selection circuit, according to the adjustable pulse signal of described difference voltage output duty cycle, control respectively turning on and off of switching tube in the first audio amplifier circuit and the second audio amplifier circuit, regulation output is to the power of loud speaker and mobile communications network;

Between described audio output device and the second audio amplifier circuit, also comprise filtering and optimize module;

Described audio output device comprises:.

Be arranged on the main MIC of mobile phone front below and be arranged on top, the mobile phone back side from MIC;

Filtering and optimization module comprise the first subfilter, the second subfilter and senior filter; The first subfilter is processed main MIC voice data information, and output state is estimated x1 and estimation error covariance matrix p1; The second subfilter is processed from MIC voice data information, and output state is estimated x2 and estimation error covariance matrix p2; Described state estimation x1, x2 and estimation error covariance matrix p1, p2 delivers to senior filter, and by formula (1) and formula (2), merges together with the state estimation of senior filter, obtains global optimum and estimates and covariance matrix:

${\hat{x}}_g=p_g\left(\underset{i=1}{\overset{2}{\mathrm{\Σ}}}{p}_i^{-1}{\hat{x}}_i\right)---\left(1\right)$

$p_g=\underset{i=1}{\overset{2}{\mathrm{\Σ}}}{p}_i^{-1}---\left(2\right)$

In formula, i=1,2;

The optimal estimation value of senior filter is reset to the state estimation of 2 subfilters,

${\hat{x}}_i={\hat{x}}_g---\left(3\right)$

$p_i={\mathrm{\β}}_i^{-1}{p}_g---\left(4\right)$

Using main MIC voice data information as analyzing datum quantity, automatically adjust the size of p value, concrete adaptive algorithm is:

β ₁, β ₂meet β ₁+ β ₂=1 (5)

${\mathrm{\β}}_1=\left\{\begin{array}{c}0.99,p\≤2\\ 2/p,2\≤p\≤5\\ 1/p,5\≤p\≤10\\ 2/p,p\≥10\end{array}\right.---\left(6\right)$

Described the second audio amplifier circuit receives described filtering and optimizes the output signal of module, and the audio signal after optimizing is sent to another mobile reception end by mobile communications network.