CN101212844B - Popular digital cross network sound system - Google Patents
Popular digital cross network sound system Download PDFInfo
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- CN101212844B CN101212844B CN2006101479305A CN200610147930A CN101212844B CN 101212844 B CN101212844 B CN 101212844B CN 2006101479305 A CN2006101479305 A CN 2006101479305A CN 200610147930 A CN200610147930 A CN 200610147930A CN 101212844 B CN101212844 B CN 101212844B
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Abstract
The invention relates to a universal-typed digital cross network sound system. The invention comprises a pulse width modulator into which audio frequency is input in the conversion of pulse amplitude; a filter that respectively splits the audio signals converted by the pulse amplitude by corresponding high, intermediate and low frequencies; an acquired controller for adjusting the output grade of the audio signals which are split; a digital power amplifier which amplifies the audio signals outputted by the acquired controller in power and outputs into a loudspeaker. The sound system can minimize the error occurred during splitting frequency of audio signal by utilizing digital components and can also appropriately save audio regeneration and output grade to suit for the inherent characteristic of a sound box, thus fully reproducing the original sound of the audio frequency so as to effectively prevent the inherent characteristic of the sound box from being distorted by the original sound of audio frequency. Expensive components such as DSP and a preposing amplifier can not be used as well; therefore, the sound system is a very useful invention that can achieve popularization.
Description
Technical field
The invention relates to Popular digital cross network sound system, refer in particular to the characteristic that need not the high price parts just can be fit to sound equipment and preserve audio reproduction and output level, thereby can fully reproduce a kind of Popular digital cross network sound system of the former sound of audio frequency.
Background technology
Recently, polytypely can develop listing to the audio frequency apparatus that the audio signal of high tone quality is amplified the sound be output as high output and generalize, and such audio frequency apparatus is just needing sound system.
Fig. 1 is the figure that the analog crossover network sound system (AnalogCrossover Network System) that mainly uses of the general audio frequency apparatus of expression constitutes.It comprises preamplifier (Pre-Amp) (10), power amplifier (Power Amp) 20, and by R, L, crossover network that G constitutes and the sound equipment shell (Speaker Encloser) 30 that comprises sounder.
Above-mentioned crossover network is the device that suitable frequency is provided toward the loud speaker of each different frequency of regeneration, can be divided into activation (Active) network and passiveness (Passive) network.
The system that image pattern 1 constitutes, if be input to above-mentioned preamplifier 10 from the audio source signal of audio frequency apparatus regeneration output, so above-mentioned preamplifier 10 will carry out preposition amplification to the audio signal that above-mentioned signal processing is crossed with the audio signal of deciding grade, at this moment, the above-mentioned audio source signal that is input to above-mentioned preamplifier 10 is an analog signal of having finished decoding at above-mentioned audio frequency apparatus.
Above-mentioned power amplifier 20 above-mentioned preamplifier 10 amplified decide the grade audio signal with the sounder that outputs to after the high-grade power amplification in the above-mentioned sound equipment shell 30, and the simulated audio signal that the sounder in above-mentioned sound equipment shell 30 is imported is assigned to each sounder by above-mentioned crossover network, that is to say that above-mentioned crossover network has cuts apart the effect that (Slice) passes through to the audio signal of input with corresponding frequencies.
In other words, in the formation of Fig. 1, HPF (High Pass Filter: high pass filter) the frequency more than the 4kHz of corresponding high pitch in the audio signal of input by outputing to corresponding high pitch loudspeaker; BPF (BandPass Filter: band pass filter) the frequency of 600Hz～4kHz of corresponding middle pitch in the audio signal of input by outputing to corresponding Squawker; And LPF (Low Pass Filter: low pass filter) frequency below the 600Hz of corresponding middle pitch in the audio signal of input is outputed to corresponding woofer by cutting apart.
So, the user can listen to the audio signal of high pitch, middle pitch, bass by above-mentioned audio frequency apparatus.
Simultaneously, all sounders should have following characteristic, and all frequencies in audio signal change audio output grade mild (Flat) in other words.But this has different inherent characteristics according to sounder manufacturing company or modeling again.
But, have in the existing analog crossover network sound system of above-mentioned formation, because constituting each parts of the sounder in the sound equipment shell 30 all is analog component, this does not have digital parts exquisiteness again, so can produce error when audio signal is cut apart with corresponding frequencies.
DSP (Digital Signal Processing) and Pre﹠amp that high price was once arranged in addition; Power Amp (preamplifier and power amplifier) replaces above-mentioned analog crossover network sound system to propose to use.But, because the parts of high price use, only be suitable for the sound system of high price, so be difficult to universalness.
Summary of the invention
Therefore, the present invention is in order to address the above problem, use digital parts, error minimize during the frequency division of audio signal, preservation makes audio reproduction and the output level that is fit to the sound equipment inherent characteristic, thereby make the former sound of abundant reproduction audio frequency, also reached do not use the high price parts and realize universalness.Therefore, purpose of the present invention just provides the Popular digital cross network sound system of realizing foregoing.
In order to achieve the above object, comprise according to Popular digital cross network sound system of the present invention:
The pulse amplitude variation changes the pulse width modulator of the audio frequency of importing;
The filter that the audio signal that above-mentioned pulse amplitude variation was changed is cut apart respectively with high, medium and low correspondent frequency;
Adjust the acquisition controller of the above-mentioned audio signal output grade of having cut apart; The above-mentioned audio signal of exporting through obtaining controller of power amplification, and output in the loud speaker digital power amplifier.
Effect of the present invention:
Above-mentioned formation can utilize the frequency of digital parts audio signal to minimize to cut apart about Popular digital cross network sound system of the present invention the time error, and make the inherent characteristic that is fit to sound equipment suitably preserve audio reproduction and output level, therefore can prevent from the former sound of audio frequency to be distorted owing to the inherent characteristic of sound equipment, also can be without high price such as DSP and preamplifier parts, and realize universalness.
For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.
Description of drawings
Fig. 1 is the expression analog crossover network sound system { figure that Analog Crossover Network System} constitutes;
Fig. 2 is that expression is according to the Popular digital cross network sound system of the present invention { figure of the formation of the embodiment of Digital CrossoverNetwork System}.
The explanation of the symbol of major part in the accompanying drawing:
10: preamplifier 20: power (power) amplifier
30,40: sound equipment shell (encloser) 41: decoder
42: power suppling part 43:PWM (pulse-width modulation) parts
44: digital power amplifier
Embodiment
Below, be elaborated for embodiment in conjunction with the accompanying drawings according to Popular digital cross network sound system of the present invention.
Fig. 2 be expression according to Popular digital cross network sound system of the present invention (Digital CrossoverNetwork System), promptly represent the figure of formation of the embodiment of sound equipment shell (Speaker Encloser) 40.Audio device in the sound equipment shell 40 is by decoder 41, power suppling part 42, and (Pulse WidthModulator: pulse-width modulation) parts 43, and digital power (power) amplifier constitutes for PWM.
In above-mentioned formation, said PWM parts 43 comprise the pulse amplitude variation change the pulse width modulator of audio signal (PWM), by EQ HPF (EQ high pass filter), EQ BPF (EQ band pass filter), above-mentioned EQ HPF is adjusted in crossover network (with EQ) that EQ LPF (EQ low pass filter) constitutes and acquisition, EQ BPF, the acquisition controller of the audio signal that EQ LPF exports respectively (Gain Controller).
And the LPF (low pass filter) that each audio signal of the amplifier (Amp) of the audio signal that the adjustment that above-mentioned digital power amplifier 44 is passed through from above-mentioned each acquisition controller by amplification output is exported and above-mentioned amplification output is exported with corresponding sound equipment constitutes.
At above-mentioned Popular digital cross network sound system, at first, above-mentioned power suppling part 42 provides power supply to the sounder of above-mentioned sound equipment shell 40 inside.
In this state, if toward above-mentioned decoder 41 input audio source signals (digital audio signal), so above-mentioned decoder 41 just is decoded into original audio signal to the digital audio signal of input according to the format of appointment, and above-mentioned decoded audio signal is added said PWM parts 43 to and preferentially carried out the pulse amplitude variation and change.
Next, each filter of said PWM parts 43, be EQ HPF, EQ BPF, the corresponding frequencies that EQ LPF is cut apart on the audio signal that above-mentioned pulse amplitude variation changes input is exported, HPF (High Pass Filter: high pass filter) cut apart the above frequency of 4kHz of exporting corresponding high pitch in the audio signal of importing, BPF (Band PassFilter band pass filter) is the frequency division output of the 600Hz～4kHz of corresponding middle pitch in the audio signal of input, and LPF (Low Pass Filter: low pass filter) the frequency division output below the 600Hz of corresponding middle pitch in the audio signal of input.
At this moment, because above-mentioned filter all has equilibrium (Equalizer is called for short EQ) function, so the characteristic of audio signal is exported with necessary scope equalization.
Each of said PWM parts 43 obtains controller and is arranged to, along with the volume adjustment of the audio signal of above-mentioned each filter input, audio output grade smooth gradually (Flat).So do, can prevent that the signal that takes place when sounder is exported from distorting phenomenon, thereby can embody tone color near former sound.
Simultaneously, each amplifier (Amp) of above-mentioned digital power amplifier 44 amplifies above-mentioned each of output and obtains the audio signal of controller input, and the audio signal of exporting above-mentioned amplification output with corresponding sound equipment on each LPF of above-mentioned digital power amplifier 44 makes the user can listen to the audio signal of bass, middle pitch, high pitch respectively by bass, middle pitch, high pitch loudspeaker.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the modification of the above embodiment.
Claims (5)
1. Popular digital cross network sound system is characterized in that comprising:
The pulse amplitude variation changes the pulse width modulator of the audio frequency of importing;
The filter that the audio signal that above-mentioned pulse amplitude variation was changed is cut apart respectively with high, medium and low correspondent frequency;
Adjust the acquisition controller of the above-mentioned audio signal output grade of having cut apart;
Power amplification is above-mentioned passes through the audio signal that obtains controller and export, and outputs to the digital power amplifier in the loud speaker;
Also comprise digital audio signal that decoding is imported and the decoder that outputs to above-mentioned pulse width modulator; Error when utilizing digital parts to minimize the frequency division of audio signal.
2. Popular digital cross network sound system as claimed in claim 1 is characterized in that:
Also comprise the power suppling part that each parts of above-mentioned sound system is provided power supply.
3. Popular digital cross network sound system as claimed in claim 1 is characterized in that:
Above-mentioned filter comprises: the high pass filter of cutting apart the frequency of corresponding high pitch; The band pass filter of cutting apart the frequency of corresponding middle pitch; The low pass filter of cutting apart the frequency of corresponding bass in addition.
4. Popular digital cross network sound system as claimed in claim 3 is characterized in that:
Above-mentioned high pass, band lead to, each filter of low pass carries out equalization to the frequency characteristic of above-mentioned high, medium and low each audio signal with necessary scope and exports.
5. Popular digital cross network sound system as claimed in claim 1 is characterized in that:
Above-mentioned acquisition controller is to adjust the output level of above-mentioned high, medium and low each audio signal by acquisition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2006101479305A CN101212844B (en) | 2006-12-25 | 2006-12-25 | Popular digital cross network sound system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101479305A CN101212844B (en) | 2006-12-25 | 2006-12-25 | Popular digital cross network sound system |
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| Publication Number | Publication Date |
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| CN101212844A CN101212844A (en) | 2008-07-02 |
| CN101212844B true CN101212844B (en) | 2011-12-21 |
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| CN2006101479305A Expired - Fee Related CN101212844B (en) | 2006-12-25 | 2006-12-25 | Popular digital cross network sound system |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102932706B (en) * | 2012-10-22 | 2016-05-04 | 歌尔声学股份有限公司 | A kind of earphone of built-in double horn and its signal processing method |
| CN105338448B (en) * | 2015-11-18 | 2018-07-31 | 深圳创维－Rgb电子有限公司 | Audio controlling method and device |
| CN106231499A (en) * | 2016-09-29 | 2016-12-14 | 宇龙计算机通信科技(深圳)有限公司 | A kind of audio Enhancement Method and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1835395A (en) * | 2005-03-18 | 2006-09-20 | 雅马哈株式会社 | Class-D amplifier |
| CN2829215Y (en) * | 2005-06-21 | 2006-10-18 | 深圳创维－Rgb电子有限公司 | D-type power amplifying circuit |
-
2006
- 2006-12-25 CN CN2006101479305A patent/CN101212844B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1835395A (en) * | 2005-03-18 | 2006-09-20 | 雅马哈株式会社 | Class-D amplifier |
| CN2829215Y (en) * | 2005-06-21 | 2006-10-18 | 深圳创维－Rgb电子有限公司 | D-type power amplifying circuit |
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| CN101212844A (en) | 2008-07-02 |
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