CN103023438B - A kind of audio distortion adjustment control equipment and audio distortion method of adjustment - Google Patents
A kind of audio distortion adjustment control equipment and audio distortion method of adjustment Download PDFInfo
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Abstract
The invention discloses a kind of audio distortion adjustment control equipment and audio distortion method of adjustment.The audio distortion adjustment control equipment that the embodiment of the present invention provides comprises: electronic sound volume adjuster, the level magnitudes of current signal to be adjusted is adjusted, be adjusted signal, and according to the processing signals that the control signal of MCU circulated using initial power amplifying signal as first time, when the trigger condition of satisfied circulation, signal last time circulation exported is as the detection signal of previous cycle, and the level magnitudes of proportion of utilization controlled quentity controlled variable to detection signal adjusts in previous cycle, until reach adjustment number of times; The power of power amplifier to input signal amplifies; Distorted signal collector gathers the distorted signal in the signal of power amplifier output, exports MCU to after this distorted signal is quantified as digital signal; MCU generates control signal and exports control signal to electronic sound volume adjuster; Signal successively exports by loud speaker respectively.
Description
Technical field
The present invention relates to audio electronics product scope, particularly a kind of audio distortion adjustment control equipment and audio distortion method of adjustment.
Background technology
Audio-frequency power amplifier is for promoting loud speaker sounding, thus the power amplification device of reproduced sound, all to use power amplifier in the electronic product of substantially all sounding.But, due to a variety of causes through power amplifier amplify after signal compared with input signal, often create distortion in various degree, cause audio distortion, as when outputing signal large, sound is sent out broken, very affect sense of hearing.
To the solution of audio distortion in prior art, there is the requirement of the power output capacity of limiting power amplifier when not affecting people's ear sense of hearing, range of application is narrower, and also has much room for improvement to the improvement effect of distortion.
Summary of the invention
In view of the above problems, the present invention is proposed to provide a kind of overcoming the problems referred to above or the audio distortion adjustment control equipment solved the problem at least in part and audio distortion method of adjustment.
For achieving the above object, the embodiment of the present invention have employed following technical scheme:
One embodiment of the invention provides a kind of audio distortion adjustment control equipment, comprising: electronic sound volume adjuster, Micro-processor MCV, power amplifier, distorted signal collector and loud speaker,
Wherein, the output of described Micro-processor MCV is connected to the input of electronic sound volume adjuster, the input of described electronic sound volume adjuster accesses signal to be adjusted, the output of described electronic sound volume adjuster is connected to the input of power amplifier, the output of described power amplifier is connected with the input of loud speaker with the described input of distorted signal collector, and the output of described distorted signal collector is connected to the input of described Micro-processor MCV;
Described electronic sound volume adjuster, the level magnitudes of current signal to be adjusted is adjusted, be adjusted signal, and, according to the processing signals of control signal using initial power amplifying signal as first time circulation of Micro-processor MCV, when the trigger condition of satisfied circulation, signal last time circulation exported is as the detection signal of previous cycle, and the level magnitudes of proportion of utilization controlled quentity controlled variable to detection signal adjusts in previous cycle, until reach adjustment number of times;
Described power amplifier, amplifies the power of input signal;
Described distorted signal collector, gathers the distorted signal in the signal of power amplifier output, exports Micro-processor MCV to after this distorted signal is quantified as digital signal;
Described Micro-processor MCV, generates control signal according to the digital signal from distorted signal collector and exports this control signal to electronic sound volume adjuster;
Described loud speaker, successively exports respectively by the output signal of described initial power amplifying signal, each circulation after power amplification.
Further, also comprise audio input buffer, band pass filter, the first electronic sound volume adjuster, first microprocessor MCU, peak value collector and ratio adder,
Wherein, the input of described audio input buffer and the input access original audio signal of described ratio adder, the output of described ratio adder is connected to described electronic sound volume adjuster, the output of described audio input buffer is connected to the input of band pass filter, the output of described band pass filter and the output of described first microprocessor MCU are connected to the first electronic sound volume adjuster, the described output of the first electronic sound volume adjuster is connected with the input of the input of peak value collector and ratio adder, the output of described peak value collector is connected to the input of first microprocessor MCU,
Described audio input buffer, exports band pass filter to after being cushioned by original audio signal;
Described band pass filter, carries out filtering to the signal of input, extracts bass signal and bass signal exported to the first electronic sound volume adjuster;
Described first electronic sound volume adjuster, the level magnitudes of current bass signal is adjusted, initially adjusted signal, and, according to control signal initially to adjust the processing signals of signal as first time primary cycle, when meeting the trigger condition of primary cycle, the signal exported by last primary cycle is as the detection signal of current primary cycle, and in current primary cycle, utilize the level magnitudes of one-level proportional control amount to detection signal to adjust, until reach one-level adjustment number of times;
Described peak value collector, gathers the peak signal in the signal of the first electronic sound volume adjuster output, exports first microprocessor MCU to after this peak signal is quantified as digital signal;
Described first microprocessor MCU, generates control signal according to described digital signal and this control signal is sent to the first electronic sound volume adjuster;
Described ratio adder, successively exports described electronic sound volume adjuster after being synthesized respectively by the signal exported in described initial adjustment signal, each primary cycle with described original audio signal.
Further, also comprise audio output buffer, the output of described first electronic sound volume adjuster is connected to the input of described audio output buffer, and the output of described audio output buffer is connected to the input of peak value collector and the input of ratio adder respectively;
Described audio output buffer, cushions the signal that the first electronic sound volume adjuster exports;
Described peak value collector, the peak signal of collection signal from audio output buffer, exports first microprocessor MCU to after this peak signal is quantified as digital signal.
Another embodiment of the present invention provides a kind of audio distortion adjustment control equipment, comprise: prime electronic sound volume adjuster, audio input buffer, band pass filter, electronic sound volume adjuster, Micro-processor MCV, peak value collector, ratio adder, power amplifier, distorted signal collector and loud speaker
The input access original audio signal of described prime electronic sound volume adjuster,
The output of described prime electronic sound volume adjuster is connected to the input of described audio input buffer and the input of ratio adder,
The output of described audio input buffer is connected to the input of band pass filter, the output of described band pass filter and the output of described Micro-processor MCV are connected to electronic sound volume adjuster, the output of described Micro-processor MCV is also connected to the input of prime electronic sound volume adjuster
The output of described electronic sound volume adjuster is connected with the input of the input of peak value collector and ratio adder, and the output of described peak value collector and the output of distorted signal collector are connected to the input of Micro-processor MCV,
The output of described ratio adder is connected to the input of power amplifier, the output of described power amplifier is connected with loud speaker with the input of distorted signal collector, the output of described distorted signal collector is connected to the input of described Micro-processor MCV, wherein
Described prime electronic sound volume adjuster, the level magnitudes of current original audio signal is adjusted, be adjusted signal, and, according to the processing signals of control signal using initial power amplifying signal as first time circulation of Micro-processor MCV, when the trigger condition of satisfied circulation, signal last time circulation exported is as the detection signal of previous cycle, and the level magnitudes of proportion of utilization controlled quentity controlled variable to detection signal adjusts in previous cycle, until reach adjustment number of times;
Described audio input buffer, exports band pass filter to by after buffer input signal;
Described band pass filter, carries out filtering to the signal of input, extracts bass signal and export bass signal to electronic sound volume adjuster;
Described electronic sound volume adjuster, the level magnitudes of current bass signal is adjusted, initially adjusted signal, and, according to the control signal of Micro-processor MCV initially to adjust the processing signals of signal as first time primary cycle, when meeting the trigger condition of primary cycle, the signal exported by last primary cycle is as the detection signal of current primary cycle, and in current primary cycle, utilize the level magnitudes of one-level proportional control amount to detection signal to adjust, until reach one-level adjustment number of times;
Described peak value collector, gathers the peak signal in the signal of electronic sound volume adjuster output, exports Micro-processor MCV to after this peak signal is quantified as digital signal;
Described distorted signal collector, gathers the distorted signal in the signal of power amplifier output, exports Micro-processor MCV to after this distorted signal is quantified as digital signal;
Described Micro-processor MCV, generate control signal according to the digital signal from peak value collector and this control signal is sent to electronic sound volume adjuster, and generate control signal according to the digital signal from distorted signal collector and this control signal is sent to prime electronic sound volume adjuster;
Described ratio adder, by the signal from electronic sound volume adjuster with synthesize from the signal of prime electronic sound volume adjuster;
Described power amplifier, amplifies the power of input signal;
Described loud speaker, successively exports respectively by the output signal of described initial power amplifying signal, each circulation after power amplification.
Further, also comprise audio output buffer, the output of described electronic sound volume adjuster is connected to the input of described audio output buffer, and the output of described audio output buffer is connected to the input of peak value collector and the input of ratio adder respectively;
Described audio output buffer, cushions the signal that electronic sound volume adjuster exports;
Described peak value collector, the peak signal of collection signal from audio output buffer, exports Micro-processor MCV to after this peak signal is quantified as digital signal.
From the above mentioned, the embodiment of the present invention utilizes Micro-processor MCV, distorted signal collector, electronic sound volume adjuster and power amplifier, different to the amplitude of different audio signals adjustment, dynamically regulated quantity can be changed when performing power amplification, thus realize a kind of novel audio distortion adjustment mode, preferably distortion Adjustment effect can be obtained, improve the tonequality of the final audio signal exported, and, this programme is when performing audio distortion adjustment, do not need to limit the fan-out capability of power amplifier, application scenarios is more extensive.
The present embodiment can adopt repeatedly circular treatment to adjust step by step large-signal, and the signal fluctuation after power amplification relaxes relatively, and the elasticity of audio signal is better.
Further embodiment of this invention additionally provides a kind of audio distortion method of adjustment, comprising:
Adjust according to the level magnitudes of setting gain to current signal to be adjusted, be adjusted signal;
The power of described adjustment signal is amplified, obtains initial power amplifying signal;
According to described current signal to be adjusted, initial power amplifying signal and loop control rule, obtain the adjustment number of times to current signal to be adjusted;
Processing signals using initial power amplifying signal as first time circulation, when the trigger condition of satisfied circulation, signal last time circulation exported is as the detection signal of previous cycle, and the level magnitudes of proportion of utilization controlled quentity controlled variable to detection signal adjusts in previous cycle, until reach described adjustment number of times;
Successively export the output signal of each circulation after described initial power amplifying signal, power amplification to loud speaker respectively.
Wherein, gather the audio frequency point meeting acquisition condition in the signal of described initial power amplifying signal and described circulation output, wherein, described acquisition condition is that the distortion factor of signal is greater than distortion factor threshold value;
Meet the trigger condition of described circulation when the quantity of audio frequency point described in the unit time exceedes amount threshold, start described circulation.
Wherein, loop control rule comprises: when the difference between initial power amplified signal with current signal amplitude to be adjusted is equal with predetermined dynamic conditioning amount, and adjustment number of times is zero; Difference between initial power amplified signal and current signal amplitude to be adjusted and predetermined dynamic conditioning amount unequal time, adjustment number of times by this difference and predetermined dynamic conditioning amount do differ from after measure divided by proportional control.
Wherein, adjusting according to the level magnitudes of setting gain to current signal to be adjusted, before being adjusted signal, described method also comprises:
Filtering is carried out to original audio signal, extracts bass signal;
Adjust according to the level magnitudes of one-level setting gain to current bass signal, initially adjusted signal;
According to current bass signal, initial adjustment signal and loop control rule, obtain the one-level adjustment number of times to current bass signal;
Initially to adjust the processing signals of signal as first time primary cycle, when meeting the trigger condition of primary cycle, the signal exported by last primary cycle is as the detection signal of current primary cycle, and in current primary cycle, utilize the level magnitudes of one-level proportional control amount to detection signal to adjust, until reach described one-level adjustment number of times;
Successively export, as described signal to be adjusted after the signal exported in described initial adjustment signal, each primary cycle is synthesized with described original audio signal respectively.
Further, described method also comprises: gather the audio frequency point meeting one-level acquisition condition in the signal of described initial adjustment signal and the output of described primary cycle; Meet the trigger condition of described primary cycle when the quantity of audio frequency point described in the unit time exceedes one-level amount threshold, start described primary cycle; Wherein, described one-level acquisition condition is that the range value of signal is greater than current bass signal and predetermined first-stage dynamic adjustment amount sum; And
Described primary cycle control law comprises: when initial adjustment signal is equal with predetermined first-stage dynamic adjustment amount with the difference between current bass signal amplitude, one-level adjustment number of times is zero; When difference between initial adjustment signal and current bass signal amplitude is unequal with predetermined dynamic conditioning amount, one-level adjustment number of times measures divided by proportional control after being done to differ from by described difference and predetermined first-stage dynamic adjustment amount.
From the above mentioned, the embodiment of the present invention is by arranging the technological means such as the proportional control amount of use in adjustment number of times and circulation, different to the amplitude of different audio signals adjustment, dynamically regulated quantity can be changed when performing power amplification, thus realize a kind of novel audio distortion adjustment mode, preferably distortion Adjustment effect can be obtained, improve the tonequality of the final audio signal exported, and, this programme is when performing audio distortion adjustment, do not need to limit the fan-out capability of power amplifier, application scenarios is more extensive.
The present embodiment can adopt repeatedly circular treatment to adjust step by step large-signal, and the signal fluctuation after power amplification relaxes relatively, and after adjustment, the elasticity of audio signal is better.
Accompanying drawing explanation
The structure chart of bass-enhancer in a kind of audio distortion adjustment control equipment that Fig. 1 provides for one embodiment of the invention;
The structure chart of the audio distortion adjustment control equipment that Fig. 2 provides for another embodiment of the present invention;
The structure chart of the audio distortion adjustment control equipment that Fig. 3 provides for another embodiment of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Bass-enhancer in a kind of audio distortion adjustment control equipment that one embodiment of the invention provides, see Fig. 1, comprise: audio input buffer 110, band pass filter (BandPassFilter, BPF) the 111, first electronic sound volume adjuster (E-VOLUME) 112, first microprocessor (MicroControlUnit, 113 MCU), peak value collector 114 and ratio adder 115, signal ratio adder exported is as the signal to be adjusted of audio distortion adjustment control equipment.Signal to be adjusted is inputed to the input of the electronic sound volume adjuster 212 shown in Fig. 2.
The input of audio input buffer 110 and the input access original audio signal of ratio adder 115, the output of audio input buffer 110 is connected to the input of band pass filter 111, the output of band pass filter 111 and the output of first microprocessor MCU113 are connected to the first electronic sound volume adjuster 112, the output of the first electronic sound volume adjuster 112 is connected with the input of the input of peak value collector 114 and ratio adder 115, and the output of peak value collector 114 is connected to the input of first microprocessor MCU113.
Therefore, audio input buffer 110, band pass filter 111, first electronic sound volume adjuster 112, first microprocessor MCU113 and peak value collector 114 are arranged in the first branch road, mainly in this branch road, the bass part in audio signal is adjusted, and ratio adder 115 is arranged in branch road, original audio signal is directly accessed to ratio adder 115 by this branch road.
Further, in scene shown in Fig. 1, bass-enhancer can also comprise audio output buffer 116, the mode that then input of the output of electronic sound volume adjuster and the input of peak value collector and ratio adder is connected is specially: the output of the first electronic sound volume adjuster 112 is connected to the input of audio output buffer 116, and the output of audio output buffer 116 is connected to the input of peak value collector 114 and the input of ratio adder 115 respectively.
Audio input buffer 110 exports band pass filter 111 to after being cushioned by original audio signal.The reason arranging audio input buffer 110 in the present embodiment is mainly: owing to inserting one-level BPF device in the first branch road, bring loss to circuit, utilizes the loss of audio input buffer 110 compensating circuit; Further, there is input impedance respectively in the first branch road and branch road, and signal input sources place there is output impedance, use this audio input buffer 110 to realize impedance matching.By upper, the present embodiment can realize isolation to audio signal and buffering by audio input buffer 110.
Band pass filter 111 carries out filtering to the signal inputing to band pass filter 111, extracts the bass signal in the bass frequency range of needs and bass signal is exported to the first electronic sound volume adjuster 112;
The level magnitudes of the first electronic sound volume adjuster 112 to current bass signal adjusts, initially adjusted signal, and, according to control signal initially to adjust the processing signals of signal as first time primary cycle, when meeting the trigger condition of primary cycle, the signal exported by last primary cycle is as the detection signal of current primary cycle, by the output signal of last primary cycle as the input signal of current primary cycle, and in current primary cycle, utilize the level magnitudes of one-level proportional control amount to detection signal to adjust, until reach adjustment number of times.
First electronic sound volume adjuster 112 is to the bass signal be currently received, and can strengthen this current bass signal according to an one-level setting gain, the mode choosing this one-level setting gain can be as follows:
If the maximum dynamic conditioning amount allowed in setting bass-enhancer is Max, the bass normal amount that bass-enhancer exports is Normal, then one-level sets the numerical value of gain as (Max+Normal)/Normal.
Such as, for obtaining preferably sense of hearing, the value of maximum dynamic conditioning amount Max can be the value of 15dB, Normal can be 20dB, then one-level setting gain is 1.75.According to this setting gain, if the amplitude of the current bass signal that the first electronic sound volume adjuster 112 receives is 30dB (large-signal), signal amplitude after then adjusting the level magnitudes of this signal is 52.5dB, and the initial adjustment signal obtained after namely adjusting this signal is 52.5dB.
Peak value collector 114 gathers the peak signal in the signal of the first electronic sound volume adjuster 112 output, exports Micro-processor MCV to after this peak signal is quantified as digital signal.The signal that peak value collector 114 can continue the first electronic sound volume adjuster 112 exports carries out Real-Time Differential quantification, and gather out the audio frequency point meeting acquisition condition, this acquisition condition is that the range value of signal is greater than current bass signal and predetermined dynamic conditioning amount sum.This predetermined dynamic conditioning amount can be above-mentioned maximum dynamic conditioning amount Max, such as, the initial adjustment signal still exported for above-mentioned electronic sound volume adjuster 112 is for 52.5dB, current bass signal and predetermined dynamic conditioning amount sum are 30dB+15dB=45dB, and 52.5dB is greater than 45dB, then meet acquisition condition, this initial adjustment signal is gathered.For the signal that electronic sound volume adjuster 112 exports in each cyclic process, also adopting above-mentioned identical mode to judge whether this signal meets acquisition condition, when meeting acquisition condition, performing acquisition operations.
Be appreciated that, owing to having connection between peak value collector 114 and the first electronic sound volume adjuster 112, peak value collector 114 can get the amplitude size of current bass signal and current bass signal by the amplitude size after the first electronic sound volume adjuster 112 one or many circular treatment from circuit.
The operation of peak value collector 114 and the first electronic sound volume adjuster 112 can be controlled by first microprocessor MCU113 according to PID (proportional-plus-derivative-integration) mode in the present embodiment, such as, Real-Time Differential quantification is carried out by the low frequency signal of peak value collector 114 to the super set point (current bass signal and maximum dynamic conditioning amount sum) after enhancing, then send into first microprocessor MCU113 and carry out time-domain integration, the integral unit time is set as 1S, within the unit time, peak value collector 114 carries out counting integration with the 2.5ms time, namely peak value collector 114 can perform every 2.5ms and once gather in audio output buffer 116, if signal when gathering meets acquisition condition, then gather this audio frequency point, and the integration of record is counted add 1, otherwise, this audio frequency point is not gathered, integration is counted constant.When the quantity (numerical value that integration is counted) of the audio frequency point recorded within an integral unit time exceedes one-level amount threshold (as 30), meet the trigger condition of primary cycle, first microprocessor MCU113 sends a control signal to electronic sound volume adjuster 112, this control signal can indicate electronic sound volume adjuster 112 proportionally controlled quentity controlled variable (as this proportional control amount can be chosen in 0.5dB-1.5dB scope) adjust the level magnitudes of current bass signal (or current bass signal signal after one or many circulation stepwise disposal), when needs carry out repeatedly circular treatment to current bass signal, namely above-mentioned control signal also starts the triggering signal of a newly circulation.
Peak value collector 114 can according to current bass signal, initial adjustment signal and primary cycle control law, obtain the one-level adjustment number of times to current bass signal, the example of this loop control rule can be: when initial adjustment signal is equal with predetermined dynamic conditioning amount with the difference between current bass signal amplitude, one-level adjustment number of times is zero; When difference between initial adjustment signal and current bass signal amplitude is unequal with predetermined first-stage dynamic adjustment amount, one-level adjustment number of times measures divided by proportional control after being done to differ from by described difference and predetermined first-stage dynamic adjustment amount.
Still illustrate with above-mentioned example, the amplitude of current bass signal is 20dB, and when the amplitude of initial adjustment signal is 35dB, because difference 15dB is between the two equal with predetermined dynamic conditioning amount 15dB, then adjusting number of times is zero, does not adjust this bass signal.If the amplitude of current bass signal is 30dB, when the amplitude of initial adjustment signal is 52.5dB, because difference 22.5dB is between the two not identical with predetermined dynamic conditioning amount 15dB, then when proportional control amount is 0.5dB, then adjusting number of times is that difference deducts the numerical value of predetermined dynamic conditioning amount and the ratio of proportional control amount, i.e. (22.5-15)/0.5=15, needs to circulate step by step adjustment 15 times to this bass signal.
Be appreciated that, for the signal that amplitude is less, the mode calculating adjustment number of times is same as described above, such as, if the amplitude of current bass signal is 10dB, the amplitude of corresponding initial adjustment signal is 17.5dB, and the difference of difference 7.5dB between the two and predetermined dynamic conditioning amount 15dB is 7.5, then the adjustment number of times obtained is 7.5/0.5=15 time.
For large-signal, the first electronic sound volume adjuster 112 proportionally amplitude of controlled quentity controlled variable to large-signal that can at every turn circulate reduces until meet predetermined dynamic conditioning amount, for small-signal, the first electronic sound volume adjuster 112 proportionally amplitude of controlled quentity controlled variable to large-signal that can at every turn circulate increases until meet predetermined dynamic conditioning amount.
First microprocessor MCU113 generates control signal according to the digital signal from the first electronic sound volume adjuster 112 and this control signal is sent to electronic sound volume adjuster.First microprocessor MCU113, as the main control device in circuit, is responsible for the operation of PID operation and relevant Based Intelligent Control.
Ratio adder 115 successively exports initially adjusting after the signal exported in signal, each circulation synthesizes with original audio signal respectively.When ratio adder 115 receives initial adjustment signal, by this, initially adjustment signal and original audio signal export after synthesizing, when needs perform circulation, when follow-up ratio adder 115 successively receives again the low frequency signal of each circulation output, the bass signal each circulation exported successively and original audio signal synthesize and export.
This processing mode, the bass signal larger to an amplitude, reduces amplitude with having levels step by step, and the bass signal less to an amplitude, have levels ground increasing degree step by step, thus make the bass in the final output audio signal of bass-enhancer have good elasticity.
Above-mentioned audio output buffer 116 cushions the signal that the first electronic sound volume adjuster exports, audio output buffer 116 can carry out further level match to the signal that the first level volume adjuster 112 exports, and signal is isolated and cushions, in some scenes, audio output buffer 116 can be omitted, and performs corresponding operating by high performance first level volume adjuster 112.When there is audio output buffer 116,
The peak signal of peak value collector 114 collection signal from audio output buffer 116, exports first microprocessor MCU113 to after this peak signal is quantified as digital signal.
The audio distortion adjustment control equipment that another embodiment of the present invention provides comprises: Micro-processor MCV 211, electronic sound volume adjuster 212, distorted signal collector 213, power amplifier 214 and loud speaker 215.The input of electronic sound volume adjuster 212 directly can access the original audio signal of front stage circuits, or, see Fig. 2, electronic sound volume adjuster 212 be input as the composite signal that proportional amplifier 115 in the circuit shown in Fig. 1 exports, electronic sound volume adjuster 212 using this composite signal as signal to be adjusted.
As shown in Figure 2, the output of ratio adder 115 and the output of Micro-processor MCV 211 are connected to the input of electronic sound volume adjuster 212, the output of electronic sound volume adjuster 212 is connected to the input of power amplifier 214, the output of power amplifier 214 is connected with the input of loud speaker 215 with the input of distorted signal collector 213, and the output of distorted signal collector 213 is connected to the input of Micro-processor MCV 211.
Ratio adder 115 exports the signal after synthesis to electronic sound volume adjuster 212.
Electronic sound volume adjuster 212, the level magnitudes of current composite signal is adjusted, be adjusted signal, and, according to the processing signals of control signal using initial power amplifying signal as first time circulation of Micro-processor MCV 211, when the trigger condition of satisfied circulation, signal last time circulation exported is as the detection signal of previous cycle, be about to the input signal of output signal as previous cycle of last circulation, and the level magnitudes of proportion of utilization controlled quentity controlled variable to detection signal adjusts in previous cycle, until reach adjustment number of times.
Electronic sound volume adjuster 212 is to the composite signal be currently received, and can strengthen this current composite signal according to a setting gain, the mode choosing this setting gain can be as follows:
If the maximum dynamic conditioning amount allowed in setting audio distortion adjustment controller is Max, the audio frequency normal amount that audio distortion adjustment controller exports is Normal, then set the numerical value of gain as (Max+Normal)/Normal.
Such as, for obtaining preferably sense of hearing, when Modulating Power, the value of maximum dynamic conditioning amount Max can be 20dB, if when the value of Normal is 20dB, then setting gain is 2.According to this setting gain, if the amplitude of current composite signal that electronic sound volume adjuster 212 receives is 30dB, being then 60dB to the signal amplitude after the level magnitudes adjustment of this signal, is namely 60dB to the adjustment signal obtained after the adjustment of this signal.
Power amplifier 214, amplifies the power of input signal.This power amplifier 214 can adopt category-A power amplifier, AB power-like amplifier, D-type power amplifier, T power-like amplifier.The power of power amplifier 214 to above-mentioned adjustment signal amplifies, and obtains initial power amplifying signal.
Micro-processor MCV 211, generates control signal according to the digital signal from distorted signal collector and exports this control signal to electronic sound volume adjuster 212.
Distorted signal collector 213, gathers the distorted signal in the signal of power amplifier 214 output, exports Micro-processor MCV 211 to after this distorted signal is quantified as digital signal.The signal that distorted signal collector 213 can continue power amplifier 214 exports carries out Real-Time Differential quantification, and gather out the audio frequency point meeting acquisition condition, this acquisition condition is that the distortion factor of signal is greater than distortion factor threshold value.The distortion factor is weighed with the waveform widths of the crest in signal waveform in distortion position in the present embodiment, then distortion factor threshold value is width threshold value, if the waveform widths of the distortion position, crest top of initial power amplifying signal exceedes width threshold value, then meet acquisition condition, this initial power amplifying signal is gathered.For the signal that electronic sound volume adjuster 212 exports in every grade of secondary cycle, after this signal is performed power amplification via power amplifier 214, above-mentioned identical mode is adopted to judge whether this signal meets acquisition condition by distorted signal collector 213, when meeting acquisition condition, perform acquisition operations.
Can according to the operation of PID mode by Micro-processor MCV 211 control distortion signal picker 213 and electronic sound volume adjuster 212 in the present embodiment, such as, Real-Time Differential quantification is carried out by the audio signal exceeding distortion factor threshold value after the 213 pairs of power amplifications of distorted signal collector, then send into Micro-processor MCV 211 and carry out time-domain integration, the integral unit time is set as 1s, within the unit time, distorted signal collector 213 carries out counting integration with the 5ms time, namely distorted signal collector 213 can perform every 5ms and once gather from power amplifier 214, if signal when gathering meets acquisition condition, then gather this audio frequency point, and the integration of record is counted add 1, otherwise, this audio frequency point is not gathered, integration is counted constant.When the quantity (numerical value that integration is counted) of the audio frequency point recorded within an integral unit time exceedes amount threshold (as 30), meet the trigger condition of circulation, Micro-processor MCV 211 sends a control signal to electronic sound volume adjuster 212, this control signal can indicate electronic sound volume adjuster 212 proportionally controlled quentity controlled variable (as this proportional control amount can be chosen in 0.5dB-1.5dB scope) adjustment current audio signals (or current audio signals signal after one or many circulation stepwise disposal) power, when needs carry out repeatedly circular treatment to current audio signals, namely above-mentioned control signal also starts the triggering signal of a newly circulation.
Distorted signal collector 213, according to current composite signal, initial power amplifying signal and loop control rule, obtains the adjustment number of times to current composite signal.This loop control rule comprises: when the difference between initial power amplified signal with current composite signal amplitude is equal with predetermined dynamic conditioning amount, and adjustment number of times is zero; Difference between initial power amplified signal and current composite signal amplitude and predetermined dynamic conditioning amount unequal time, adjustment number of times by this difference and predetermined dynamic conditioning amount do differ from after measure divided by proportional control.Such as, if predetermined dynamic conditioning amount is set as 20dB, and the amplitude of current composite signal is 30dB, when the amplitude of the initial adjustment signal obtained after power amplification is 75dB, then because difference 45dB is between the two not identical with predetermined dynamic conditioning amount 20dB, then when proportional control amount is 1dB, then adjusting number of times is that difference deducts the numerical value of predetermined dynamic conditioning amount and the ratio of proportional control amount, i.e. (45-20)/1=25, needs to circulate step by step adjustment 25 times to this audio signal.
The processing signals of electronic sound volume adjuster 212 using initial power amplifying signal as first time circulation, when the trigger condition of satisfied circulation, signal last time circulation exported is as the detection signal of previous cycle, and the level magnitudes of proportion of utilization controlled quentity controlled variable to detection signal adjusts in previous cycle, until reach the adjustment number of times of the composite signal when pre-treatment.
Electronic sound volume adjuster 212, to the adjustment signal obtained after current composite signal adjustment and to the signal exported after current composite signal circular treatment, is all sent in power amplifier 214, then exports loud speaker 215 respectively to, exported by loud speaker 215.
This processing mode, the audio signal larger to an amplitude, reduces amplitude with having levels step by step, and the audio signal less to an amplitude, have levels ground increasing degree step by step, thus the audio signal that audio distortion adjustment control equipment is finally exported has good elasticity.
See Fig. 3, show the audio distortion adjustment control equipment that further embodiment of this invention provides.Make use of the prime electronic sound volume adjuster in front stage circuits in the present embodiment and adopt same Micro-processor MCV control bass enhancing and power amplification to simplify circuit structure, this audio distortion adjustment control equipment comprises:
Prime electronic sound volume adjuster 311, audio input buffer 312, band pass filter 313, electronic sound volume adjuster 315, Micro-processor MCV 314, peak value collector 316, ratio adder 318, power amplifier 320, distorted signal collector 319 and loud speaker 321
The input access original audio signal of prime electronic sound volume adjuster 311,
The output of prime electronic sound volume adjuster 311 is connected to the input of audio input buffer 312 and the input of ratio adder,
The output of audio input buffer 312 is connected to the input of band pass filter 313, the output of band pass filter 313 and the output of Micro-processor MCV 314 are connected to electronic sound volume adjuster, the output of Micro-processor MCV 314 is also connected to the input of prime electronic sound volume adjuster
The output of electronic sound volume adjuster 315 is connected with the input of the input of peak value collector 316 and ratio adder 318, and the output of peak value collector 316 and the output of distorted signal collector are connected to the input of Micro-processor MCV 314,
The output of ratio adder 318 is connected to the input of power amplifier, the output of power amplifier is connected with loud speaker with the input of distorted signal collector, the output of distorted signal collector 319 is connected to the input of Micro-processor MCV 314, wherein
Prime electronic sound volume adjuster 311, the level magnitudes of current original audio signal is adjusted, be adjusted signal, and, according to the processing signals of control signal using initial power amplifying signal as first time circulation of Micro-processor MCV 314, when the trigger condition of satisfied circulation, signal last time circulation exported is as the detection signal of previous cycle, and the level magnitudes of proportion of utilization controlled quentity controlled variable to detection signal adjusts in previous cycle, until reach adjustment number of times;
Audio input buffer 312, exports band pass filter to by after buffer input signal;
Band pass filter 313, carries out filtering to the signal of input, extracts bass signal and export bass signal to electronic sound volume adjuster;
Electronic sound volume adjuster 315, the level magnitudes of current bass signal is adjusted, initially adjusted signal, and, according to the control signal of Micro-processor MCV 314 initially to adjust the processing signals of signal as first time primary cycle, when meeting the trigger condition of primary cycle, the signal exported by last primary cycle is as the detection signal of current primary cycle, and in current primary cycle, utilize the level magnitudes of one-level proportional control amount to detection signal to adjust, until reach one-level adjustment number of times;
Peak value collector 316, gathers the peak signal in the signal of electronic sound volume adjuster 315 output, exports Micro-processor MCV 314 to after this peak signal is quantified as digital signal;
Distorted signal collector 319, gathers the distorted signal in the signal of power amplifier 320 output, exports Micro-processor MCV 314 to after this distorted signal is quantified as digital signal;
Micro-processor MCV 314, generate control signal according to the digital signal from peak value collector 316 and this control signal is sent to electronic sound volume adjuster 315, and generate control signal according to the digital signal from distorted signal collector and this control signal is sent to prime electronic sound volume adjuster 311;
Ratio adder 318, by the signal from electronic sound volume adjuster with synthesize from the signal of prime electronic sound volume adjuster;
Power amplifier 320, amplifies the power of input signal;
Loud speaker 321, successively exports respectively by the signal exported in initial power amplifying signal, each circulation.
Above-mentioned bass-enhancer also comprises audio output buffer 317, and the input of the output of electronic sound volume adjuster and the input of peak value collector and ratio adder 318 is connected and comprises:
The output of electronic sound volume adjuster is connected to the input of audio output buffer 317, and the output of audio output buffer 317 is connected to the input of peak value collector 316 and the input of ratio adder 318 respectively;
Audio output buffer 317, cushions the signal that electronic sound volume adjuster exports;
Peak value collector 316, the peak signal of collection signal from audio output buffer 317, exports Micro-processor MCV 314 to after this peak signal is quantified as digital signal.
The bass-enhancer that the present embodiment provides can strengthen the bass part of original audio signal and carry out power amplification to signal, and, the present embodiment achieves the multiplexing of Micro-processor MCV, Micro-processor MCV 314 transmits control signal to prime electronic sound volume adjuster 311 and controls power amplification, and Micro-processor MCV 314 transmits control signal to electronic sound volume adjuster 315 and controls bass enhancing, simplifies circuit structure.
In the present embodiment, the specific works mode of each device see the description content of the corresponding device in other embodiments of the invention, can not repeat at this.
From the above mentioned, the audio distortion adjustment control equipment that the embodiment of the present invention provides, utilize Micro-processor MCV, distorted signal collector, electronic sound volume adjuster and power amplifier, different to the amplitude of different audio signals adjustment, dynamically regulated quantity can be changed when performing power amplification, thus realize a kind of novel audio distortion adjustment mode, preferably distortion Adjustment effect can be obtained, improve the tonequality of the final audio signal exported, and, this programme is when performing audio distortion adjustment, do not need to limit the fan-out capability of power amplifier, application scenarios is more extensive.
The present embodiment can adopt repeatedly circular treatment to adjust step by step large-signal, and the signal fluctuation after power amplification relaxes relatively, and the elasticity of audio signal is better.
And, the embodiment of the present invention utilizes Micro-processor MCV, peak value collector and electronic sound volume adjuster, the amplitude adjusted different bass signal is different, dynamically regulated quantity can be changed when bass strengthens, thus realize a kind of novel dynamic bass enhancement method, solve the problem of easy wave absorption during large-signal, and, by changing the frequency acquisition of peak value collector in this programme, acquisition condition, or change the proportional control amount of electronic sound volume adjuster use, trigger condition etc., the adjustment to dynamic compression time and decrement can be realized, significantly reduce adjustment difficulty, improve the flexibility of adjustment, thus improve the audio quality strengthening rear bass, improve the effect of the rear replaying bass of adjustment, especially preferably low frequency sense of hearing dynamics can be obtained.
Further, the present embodiment can adopt repeatedly circular treatment to adjust step by step large-signal, and the signal fluctuation after adjustment relaxes relatively, and after adjustment, the elasticity of bass signal is better.
Further embodiment of this invention additionally provides a kind of audio distortion method of adjustment, comprising:
S1: adjust according to the level magnitudes of setting gain to current signal to be adjusted, be adjusted signal;
S2: the power of described adjustment signal is amplified, obtains initial power amplifying signal;
S3: according to described current signal to be adjusted, initial power amplifying signal and loop control rule, obtain the adjustment number of times to current signal to be adjusted;
S4: the processing signals using initial power amplifying signal as first time circulation, when the trigger condition of satisfied circulation, signal last time circulation exported is as the detection signal of previous cycle, and the level magnitudes of proportion of utilization controlled quentity controlled variable to detection signal adjusts in previous cycle, until reach described adjustment number of times;
S5: successively export the output signal of each circulation after described initial power amplifying signal, power amplification to loud speaker respectively.
Wherein, in step s 4 which, gather the audio frequency point meeting acquisition condition in the signal of described initial power amplifying signal and described circulation output, wherein, described acquisition condition is that the distortion factor of signal is greater than distortion factor threshold value; Meet the trigger condition of described circulation when the quantity of audio frequency point described in the unit time exceedes amount threshold, start described circulation;
Wherein, above-mentioned loop control rule comprises: when the difference between initial power amplified signal with current signal amplitude to be adjusted is equal with predetermined dynamic conditioning amount, and adjustment number of times is zero; Difference between initial power amplified signal and current signal amplitude to be adjusted and predetermined dynamic conditioning amount unequal time, adjustment number of times by this difference and predetermined dynamic conditioning amount do differ from after measure divided by proportional control.
Further, before step S1, the method also comprises:
Filtering is carried out to original audio signal, extracts bass signal;
Adjust according to the level magnitudes of one-level setting gain to current bass signal, initially adjusted signal;
According to current bass signal, initial adjustment signal and loop control rule, obtain the one-level adjustment number of times to current bass signal;
Initially to adjust the processing signals of signal as first time primary cycle, when meeting the trigger condition of primary cycle, the signal exported by last primary cycle is as the detection signal of current primary cycle, and in current primary cycle, utilize the level magnitudes of one-level proportional control amount to detection signal to adjust, until reach described one-level adjustment number of times; Wherein, the audio frequency point meeting one-level acquisition condition in the signal of described initial adjustment signal and the output of described primary cycle is gathered; Meet the trigger condition of described primary cycle when the quantity of audio frequency point described in the unit time exceedes one-level amount threshold, start described primary cycle; Wherein, described one-level acquisition condition is that the range value of signal is greater than current bass signal and predetermined first-stage dynamic adjustment amount sum;
Successively export, as described signal to be adjusted after the signal exported in described initial adjustment signal, each primary cycle is synthesized with described original audio signal respectively.
Optionally, above-mentioned primary cycle control law comprises: when initial adjustment signal is equal with predetermined first-stage dynamic adjustment amount with the difference between current bass signal amplitude, one-level adjustment number of times is zero; When difference between initial adjustment signal and current bass signal amplitude is unequal with predetermined dynamic conditioning amount, one-level adjustment number of times measures divided by proportional control after being done to differ from by described difference and predetermined first-stage dynamic adjustment amount.
From the above mentioned, the embodiment of the present invention is by arranging the technological means such as the proportional control amount of use in adjustment number of times and circulation, the amplitude adjusted different bass signal is different, dynamically regulated quantity can be changed when bass strengthens, thus realize a kind of novel dynamic bass enhancement method, solve the problem of easy wave absorption during large-signal, and, by changing loop control rule in this programme, or change proportional control amount, trigger condition etc., the adjustment to dynamic compression time and decrement can be realized, significantly reduce adjustment difficulty, improve the flexibility of adjustment, thus improve the audio quality strengthening rear bass, improve the effect of the rear replaying bass of adjustment, especially preferably low frequency sense of hearing dynamics can be obtained.
And, the embodiment of the present invention is by arranging the technological means such as the proportional control amount of use in adjustment number of times and circulation, different to the amplitude of different audio signals adjustment, dynamically regulated quantity can be changed when performing power amplification, thus realize a kind of novel audio distortion adjustment mode, preferably distortion Adjustment effect can be obtained, improve the tonequality of the final audio signal exported, and, this programme is when performing audio distortion adjustment, do not need to limit the fan-out capability of power amplifier, application scenarios is more extensive.
The present embodiment can adopt repeatedly circular treatment to adjust step by step large-signal, and the signal fluctuation after power amplification relaxes relatively, and after adjustment, the elasticity of audio signal is better.
Further, the present embodiment can adopt repeatedly circular treatment to adjust step by step large-signal, and the signal fluctuation after adjustment relaxes relatively, and after adjustment, the elasticity of bass signal is better.
The foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included in protection scope of the present invention.
Claims (10)
1. an audio distortion adjustment control equipment, is characterized in that, comprising: electronic sound volume adjuster, Micro-processor MCV, power amplifier, distorted signal collector and loud speaker,
Wherein, the output of described Micro-processor MCV is connected to the input of electronic sound volume adjuster, the input of described electronic sound volume adjuster accesses signal to be adjusted, the output of described electronic sound volume adjuster is connected to the input of power amplifier, the output of described power amplifier is connected with the input of loud speaker with the described input of distorted signal collector, and the output of described distorted signal collector is connected to the input of described Micro-processor MCV;
Described electronic sound volume adjuster, the level magnitudes of current signal to be adjusted is adjusted, be adjusted signal, and, according to the processing signals of control signal using initial power amplifying signal as first time circulation of Micro-processor MCV, when the trigger condition of satisfied circulation, signal last time circulation exported is as the detection signal of previous cycle, and the level magnitudes of proportion of utilization controlled quentity controlled variable to detection signal adjusts in previous cycle, until reach adjustment number of times;
Described power amplifier, amplifies the power of input signal;
Described distorted signal collector, gathers the distorted signal in the signal of power amplifier output, exports Micro-processor MCV to after this distorted signal is quantified as digital signal;
Described Micro-processor MCV, generates control signal according to the digital signal from distorted signal collector and exports this control signal to electronic sound volume adjuster;
Described loud speaker, successively exports respectively by the output signal of described initial power amplifying signal, each circulation after power amplification.
2. audio distortion adjustment control equipment according to claim 1, is characterized in that, also comprises audio input buffer, band pass filter, the first electronic sound volume adjuster, first microprocessor MCU, peak value collector and ratio adder,
Wherein, the input of described audio input buffer and the input access original audio signal of described ratio adder, the output of described ratio adder is connected to described electronic sound volume adjuster, the output of described audio input buffer is connected to the input of band pass filter, the output of described band pass filter and the output of described first microprocessor MCU are connected to the first electronic sound volume adjuster, the described output of the first electronic sound volume adjuster is connected with the input of the input of peak value collector and ratio adder, the output of described peak value collector is connected to the input of first microprocessor MCU,
Described audio input buffer, exports band pass filter to after being cushioned by original audio signal;
Described band pass filter, carries out filtering to the signal of input, extracts bass signal and bass signal exported to the first electronic sound volume adjuster;
Described first electronic sound volume adjuster, the level magnitudes of current bass signal is adjusted, initially adjusted signal, and, according to control signal initially to adjust the processing signals of signal as first time primary cycle, when meeting the trigger condition of primary cycle, the signal exported by last primary cycle is as the detection signal of current primary cycle, and in current primary cycle, utilize the level magnitudes of one-level proportional control amount to detection signal to adjust, until reach one-level adjustment number of times;
Described peak value collector, gathers the peak signal in the signal of the first electronic sound volume adjuster output, exports first microprocessor MCU to after this peak signal is quantified as digital signal;
Described first microprocessor MCU, generates control signal according to described digital signal and this control signal is sent to the first electronic sound volume adjuster;
Described ratio adder, successively exports described electronic sound volume adjuster after being synthesized respectively by the signal exported in described initial adjustment signal, each primary cycle with described original audio signal.
3. audio distortion adjustment control equipment according to claim 2, is characterized in that, also comprises audio output buffer, and the input of the described output of the first electronic sound volume adjuster and the input of peak value collector and ratio adder is connected and comprises:
The output of described first electronic sound volume adjuster is connected to the input of described audio output buffer, and the output of described audio output buffer is connected to the input of peak value collector and the input of ratio adder respectively;
Described audio output buffer, cushions the signal that the first electronic sound volume adjuster exports;
Described peak value collector, the peak signal of collection signal from audio output buffer, exports first microprocessor MCU to after this peak signal is quantified as digital signal.
4. an audio distortion adjustment control equipment, it is characterized in that, comprise: prime electronic sound volume adjuster, audio input buffer, band pass filter, electronic sound volume adjuster, Micro-processor MCV, peak value collector, ratio adder, power amplifier, distorted signal collector and loud speaker
The input access original audio signal of described prime electronic sound volume adjuster,
The output of described prime electronic sound volume adjuster is connected to the input of described audio input buffer and the input of ratio adder,
The output of described audio input buffer is connected to the input of band pass filter, the output of described band pass filter and the output of described Micro-processor MCV are connected to electronic sound volume adjuster, the output of described Micro-processor MCV is also connected to the input of prime electronic sound volume adjuster
The output of described electronic sound volume adjuster is connected with the input of the input of peak value collector and ratio adder, and the output of described peak value collector and the output of distorted signal collector are connected to the input of Micro-processor MCV,
The output of described ratio adder is connected to the input of power amplifier, the output of described power amplifier is connected with loud speaker with the input of distorted signal collector, the output of described distorted signal collector is connected to the input of described Micro-processor MCV, wherein
Described prime electronic sound volume adjuster, the level magnitudes of current original audio signal is adjusted, be adjusted signal, and, according to the processing signals of control signal using initial power amplifying signal as first time circulation of Micro-processor MCV, when the trigger condition of satisfied circulation, signal last time circulation exported is as the detection signal of previous cycle, and the level magnitudes of proportion of utilization controlled quentity controlled variable to detection signal adjusts in previous cycle, until reach adjustment number of times;
Described audio input buffer, exports band pass filter to by after buffer input signal;
Described band pass filter, carries out filtering to the signal of input, extracts bass signal and export bass signal to electronic sound volume adjuster;
Described electronic sound volume adjuster, the level magnitudes of current bass signal is adjusted, initially adjusted signal, and, according to the control signal of Micro-processor MCV initially to adjust the processing signals of signal as first time primary cycle, when meeting the trigger condition of primary cycle, the signal exported by last primary cycle is as the detection signal of current primary cycle, and in current primary cycle, utilize the level magnitudes of one-level proportional control amount to detection signal to adjust, until reach one-level adjustment number of times;
Described peak value collector, gathers the peak signal in the signal of electronic sound volume adjuster output, exports Micro-processor MCV to after this peak signal is quantified as digital signal;
Described distorted signal collector, gathers the distorted signal in the signal of power amplifier output, exports Micro-processor MCV to after this distorted signal is quantified as digital signal;
Described Micro-processor MCV, generate control signal according to the digital signal from peak value collector and this control signal is sent to electronic sound volume adjuster, and generate control signal according to the digital signal from distorted signal collector and this control signal is sent to prime electronic sound volume adjuster;
Described ratio adder, by the signal from electronic sound volume adjuster with synthesize from the signal of prime electronic sound volume adjuster;
Described power amplifier, amplifies the power of input signal;
Described loud speaker, successively exports respectively by the output signal of described initial power amplifying signal, each circulation after power amplification.
5. audio distortion adjustment control equipment according to claim 4, is characterized in that, also comprises audio output buffer, and the input of the output of described electronic sound volume adjuster and the input of peak value collector and ratio adder is connected and comprises:
The output of described electronic sound volume adjuster is connected to the input of described audio output buffer, and the output of described audio output buffer is connected to the input of peak value collector and the input of ratio adder respectively;
Described audio output buffer, cushions the signal that electronic sound volume adjuster exports;
Described peak value collector, the peak signal of collection signal from audio output buffer, exports Micro-processor MCV to after this peak signal is quantified as digital signal.
6. an audio distortion method of adjustment, is characterized in that, described method comprises:
Adjust according to the level magnitudes of setting gain to current signal to be adjusted, be adjusted signal;
The power of described adjustment signal is amplified, obtains initial power amplifying signal;
According to described current signal to be adjusted, initial power amplifying signal and loop control rule, obtain the adjustment number of times to current signal to be adjusted;
Processing signals using initial power amplifying signal as first time circulation, when the trigger condition of satisfied circulation, signal last time circulation exported is as the detection signal of previous cycle, and the level magnitudes of proportion of utilization controlled quentity controlled variable to detection signal adjusts in previous cycle, until reach described adjustment number of times;
Successively export the output signal of each circulation after described initial power amplifying signal, power amplification to loud speaker respectively.
7. method according to claim 6, is characterized in that, described method comprises:
Gather the audio frequency point meeting acquisition condition in the signal of described initial power amplifying signal and described circulation output, wherein, described acquisition condition is that the distortion factor of signal is greater than distortion factor threshold value;
Meet the trigger condition of described circulation when the quantity of audio frequency point described in the unit time exceedes amount threshold, start described circulation.
8. method according to claim 6, is characterized in that, described loop control rule comprises:
When difference between initial power amplified signal with current signal amplitude to be adjusted is equal with predetermined dynamic conditioning amount, adjustment number of times is zero;
Difference between initial power amplified signal and current signal amplitude to be adjusted and predetermined dynamic conditioning amount unequal time, adjustment number of times by this difference and predetermined dynamic conditioning amount do differ from after measure divided by proportional control.
9. method according to claim 6, is characterized in that, adjusting according to the level magnitudes of setting gain to current signal to be adjusted, before being adjusted signal, described method also comprises:
Filtering is carried out to original audio signal, extracts bass signal;
Adjust according to the level magnitudes of one-level setting gain to current bass signal, initially adjusted signal;
According to current bass signal, initial adjustment signal and loop control rule, obtain the one-level adjustment number of times to current bass signal;
Initially to adjust the processing signals of signal as first time primary cycle, when meeting the trigger condition of primary cycle, the signal exported by last primary cycle is as the detection signal of current primary cycle, and in current primary cycle, utilize the level magnitudes of one-level proportional control amount to detection signal to adjust, until reach described one-level adjustment number of times;
Successively export, as described signal to be adjusted after the signal exported in described initial adjustment signal, each primary cycle is synthesized with described original audio signal respectively.
10. method according to claim 9, is characterized in that, described method also comprises:
Gather the audio frequency point meeting one-level acquisition condition in the signal of described initial adjustment signal and the output of described primary cycle;
Meet the trigger condition of described primary cycle when the quantity of audio frequency point described in the unit time exceedes one-level amount threshold, start described primary cycle;
Wherein, described one-level acquisition condition is that the range value of signal is greater than current bass signal and predetermined first-stage dynamic adjustment amount sum; And
Described primary cycle control law comprises:
When initial adjustment signal is equal with predetermined first-stage dynamic adjustment amount with the difference between current bass signal amplitude, one-level adjustment number of times is zero;
When difference between initial adjustment signal and current bass signal amplitude is unequal with predetermined first-stage dynamic adjustment amount, one-level adjustment number of times measures divided by proportional control after being done to differ from by described difference and predetermined dynamic conditioning amount.
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| CN110933486B (en) * | 2019-11-07 | 2021-08-31 | 深圳创维－Rgb电子有限公司 | Sound distortion control method and device, television and storage medium |
| CN111654781B (en) * | 2020-03-13 | 2021-08-10 | 广州励丰文化科技股份有限公司 | Low-frequency drive compensation method and system based on loudspeaker |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2814804Y (en) * | 2005-05-13 | 2006-09-06 | 北京爱德发高科技中心 | EIDC intelligent distortion control self-protecting system |
| CN101820563A (en) * | 2010-04-06 | 2010-09-01 | 瑞声声学科技(深圳)有限公司 | Speaker protection system |
| CN102100003A (en) * | 2008-07-24 | 2011-06-15 | 高通股份有限公司 | Method and apparatus for reducing audio artifacts |
| CN202957789U (en) * | 2012-11-30 | 2013-05-29 | 青岛歌尔声学科技有限公司 | Audio distortion adjusting and controlling apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4482812B2 (en) * | 2005-03-29 | 2010-06-16 | ソニー株式会社 | Amplifier output control device, audio device, and amplifier output control method |
-
2012
- 2012-11-30 CN CN201210507685.XA patent/CN103023438B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2814804Y (en) * | 2005-05-13 | 2006-09-06 | 北京爱德发高科技中心 | EIDC intelligent distortion control self-protecting system |
| CN102100003A (en) * | 2008-07-24 | 2011-06-15 | 高通股份有限公司 | Method and apparatus for reducing audio artifacts |
| CN101820563A (en) * | 2010-04-06 | 2010-09-01 | 瑞声声学科技(深圳)有限公司 | Speaker protection system |
| CN202957789U (en) * | 2012-11-30 | 2013-05-29 | 青岛歌尔声学科技有限公司 | Audio distortion adjusting and controlling apparatus |
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