TWI421860B - Dynamic sound quality control device - Google Patents
Dynamic sound quality control device Download PDFInfo
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- TWI421860B TWI421860B TW99136856A TW99136856A TWI421860B TW I421860 B TWI421860 B TW I421860B TW 99136856 A TW99136856 A TW 99136856A TW 99136856 A TW99136856 A TW 99136856A TW I421860 B TWI421860 B TW I421860B
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Description
本發明是有關於一種動態音質控制裝置，尤指一種可依所需利用控制單元自行調整音源訊號之參數設定值，以獲得適當之無效時間(dead time)使音質最佳化，而達到改善音質以及提昇音質之功效者。The invention relates to a dynamic sound quality control device, in particular to a parameter setting value for adjusting the sound source signal by using the control unit as needed, to obtain an appropriate dead time to optimize the sound quality, and to improve the sound quality. And the effect of improving the sound quality.
按，一般習用D類音訊放大器之脈寬調變(Pulse Width Modulation,PWM)信號係自左、右邊分兩路輸入於D類音訊放大器內，其路徑中分別安置著反相器，並於輸出端連接揚聲器(即喇叭)，且於電源VCC與N點(低電位點)之間連接多級互補式電晶體對。Press, the Pulse Width Modulation (PWM) signal of the conventional D-type audio amplifier is input into the D-type audio amplifier from the left and the right, and the inverter is placed in the path and output. The speaker is connected to the speaker (ie, the speaker), and a multi-stage complementary transistor pair is connected between the power source VCC and the N point (low potential point).
然此D類音訊放大器之理想波形輸入後，於同時改變狀態的瞬間，因為偏壓於電源中間準位，可能使上下分路同時導通，於是形成過大之電流而損壞。而為了避免前述之情形，因此電路設計者都在波形同時改變狀態之時會控制電晶體對不會同時導通，若電晶體對不同時導通且等效導通時間長，此時原本應該下降之電壓，卻因拖延一段時間後才下降，而形成多餘的波形區域，若電晶體對不同時導通且等效導通時間短，此時原本應該上升之電壓，卻因拖延一段時間後才上升，而形成損失的波形區域，進而形成無效時間(dead time)，不過此種無效時間之設計雖可避免電流過大而產生之損壞，但會因無效時間之設計，而無法輸出一理想的正弦波，導致輸出波形形成扭曲而不平順之實際輸出，而此種扭曲而不平順的實際輸出使得 總諧波失真(Total Harmonic Distortion,THD)增加，而造成音訊聆聽品質低落之情形發生。However, after the ideal waveform of the class D audio amplifier is input, at the moment of changing the state at the same time, because the bias voltage is at the intermediate level of the power source, the upper and lower shunts may be turned on at the same time, so that an excessive current is formed and damaged. In order to avoid the above situation, the circuit designer will control the transistor pair to not conduct at the same time when the waveform changes state at the same time. If the transistor pair is not turned on at the same time and the equivalent conduction time is long, the voltage should be lowered at this time. However, it is delayed after a period of delay, and an unnecessary waveform region is formed. If the transistor is not turned on at the same time and the equivalent conduction time is short, the voltage that should have risen at this time is raised after a delay, and is formed. The lost waveform area, in turn, forms a dead time. However, the design of this invalid time can avoid the damage caused by excessive current, but it cannot output an ideal sine wave due to the design of invalid time, resulting in output. The waveform forms an actual output that is distorted and not smooth, and the actual output of such distortion is not smooth Total Harmonic Distortion (THD) is increased, which causes the quality of audio listening to be low.
本發明之主要目的係在於，可依所需利用控制單元自行調整音源訊號之參數設定值，以獲得適當之無效時間(dead time)使音質最佳化，而達到改善音質以及提昇音質之功效。The main purpose of the present invention is to adjust the parameter setting value of the sound source signal by using the control unit as needed to obtain an appropriate dead time to optimize the sound quality, thereby improving the sound quality and improving the sound quality.
為達上述之目的，本發明係一種動態音質控制裝置，包含一可接收音源訊號之解碼單元，可將串列信號轉成並列信號；一與解碼單元連接之內差轉換單元，可將並列信號轉成內差信號；一與係與內差轉換單元連接之調變單元，可接收內差信號供進行調變；一與調變單元連接之過濾單元，可濾除高頻信號雜訊；一與調變單元連接之控制單元，可對音源訊號進行參數調整；一與過濾單元連接之PWM產生單元；可將音源位準訊號轉成音源寬度訊號以及一與PWM產生單元及控制單元連接之PWM驅動單元，可避免產生重疊之音源訊號，並將數位音源訊號回授至控制單元。In order to achieve the above object, the present invention is a dynamic sound quality control device, comprising a decoding unit capable of receiving a sound source signal, which can convert a serial signal into a parallel signal; and an internal difference conversion unit connected to the decoding unit, can be a parallel signal Converting into an internal difference signal; a modulation unit connected to the internal difference conversion unit can receive the internal difference signal for modulation; and a filtering unit connected to the modulation unit can filter high frequency signal noise; The control unit connected to the modulation unit can adjust the parameter of the sound source signal; a PWM generating unit connected to the filtering unit; can convert the sound source level signal into a sound source width signal and a PWM connected to the PWM generating unit and the control unit The driving unit can avoid overlapping source signals and feedback the digital signal to the control unit.
於本發明之一實施例中，該調變單元係包含有多數分別與控制單元連接之積分器、加法器、權重產生器及量化器。In an embodiment of the invention, the modulation unit includes a plurality of integrators, adders, weight generators, and quantizers respectively connected to the control unit.
於本發明之一實施例中，該PWM產生單元係包含有一減法器及一斜波計數器。In an embodiment of the invention, the PWM generating unit includes a subtractor and a ramp counter.
於本發明之一實施例中，該PWM驅動單元係可進一步連接有一輸出單元。In an embodiment of the invention, the PWM driving unit is further connected to an output unit.
於本發明之一實施例中，該輸出單元係可為喇叭。In an embodiment of the invention, the output unit is a horn.
請參閱『第1及第2圖』所示，係分別為本發明之基本架構示意圖及本發明之調變單元示意圖。如圖所示：本發明係一種動態音質控制裝置，其至少包含一解碼單元1、一內差轉換單元2、一調變單元3、一過濾單元4、一控制單元5、一脈寬調變(Pulse Width Modulation,PWM)產生單元6以及一PWM驅動單元7所構成。Please refer to the "1st and 2nd drawings" for a schematic diagram of the basic architecture of the present invention and a schematic diagram of the modulation unit of the present invention. As shown in the figure, the present invention is a dynamic sound quality control device, which comprises at least a decoding unit 1, an internal difference conversion unit 2, a modulation unit 3, a filtering unit 4, a control unit 5, and a pulse width modulation. (Pulse Width Modulation, PWM) generating unit 6 and a PWM driving unit 7.
上述所提之解碼單元1係可接收音源訊號，並將串列信號轉成並列信號。The decoding unit 1 mentioned above can receive the sound source signal and convert the serial signal into a parallel signal.
該內差轉換單元2係與解碼單元1連接，係將並列信號轉成內差信號。The internal difference conversion unit 2 is connected to the decoding unit 1, and converts the parallel signal into an internal difference signal.
該調變單元3係與內差轉換單元2連接，可接收內差信號供進行調變，而該調變單元3係包含有多數積分器31、加法器32、權重產生器33及量化器34。The modulation unit 3 is connected to the internal difference conversion unit 2, and can receive an internal difference signal for modulation. The modulation unit 3 includes a majority of the integrator 31, the adder 32, the weight generator 33, and the quantizer 34. .
該過濾單元4係與調變單元3連接，可濾除高頻信號雜訊。The filter unit 4 is connected to the modulation unit 3 to filter out high frequency signal noise.
該控制單元5係分別與調變單元3之各積分器31、各加法器32、各權重產生器33及量化器34連接，可對音源訊號進行參數調整。The control unit 5 is connected to each of the integrators 31, the adders 32, the weight generators 33 and the quantizers 34 of the modulation unit 3, and can adjust the parameters of the sound source signals.
該PWM產生單元6係與過濾單元4連接，可將類比音源訊號轉成數位音源訊號，而該PWM產生單元6係包含有一減法器61及一斜波計數器62。The PWM generating unit 6 is connected to the filtering unit 4 to convert the analog sound source signal into a digital sound source signal, and the PWM generating unit 6 includes a subtractor 61 and a ramp counter 62.
該PWM驅動單元7係與PWM產生單元6及控制單元5連接，可避免產生重疊之音源訊號，並將數位音源訊號回授至控制單元5，而該PWM驅動單元7係可進一步連接有一輸出 單元71，其中該輸出單元71係可為喇叭。The PWM driving unit 7 is connected to the PWM generating unit 6 and the control unit 5 to avoid overlapping source signals and to feed back the digital signal to the control unit 5, and the PWM driving unit 7 can be further connected to an output. Unit 71, wherein the output unit 71 is a horn.
當本發明於運用時，係使音源訊號傳輸至解碼單元1，並由該解碼單元1將音源訊號之串列信號轉成並列信號，再以該內差轉換單元2將並列信號轉成內差信號，作為雜訊信號之前處理，之後由該調變單元3接收內差信號進行調變，並以該過濾單元4濾除高頻信號雜訊，留下聲音信號，且將該聲音信號透過PWM產生單元6之減法器61以及斜波計數器62可將音源位準訊號轉成音源寬度訊號並以PWM驅動單元7避免產生重疊之音源訊號，並將數位音源訊號回授至控制單元5且同時由輸出單元71輸出相關之音源訊號。When the present invention is used, the sound source signal is transmitted to the decoding unit 1, and the serial signal of the sound source signal is converted into a parallel signal by the decoding unit 1, and the parallel signal is converted into the internal difference by the internal difference conversion unit 2. The signal is processed as a noise signal, and then the intermodulation signal is received by the modulation unit 3 for modulation, and the high frequency signal noise is filtered by the filtering unit 4, leaving a sound signal, and the sound signal is transmitted through the PWM. The subtracter 61 of the generating unit 6 and the ramp counter 62 can convert the sound source level signal into the sound source width signal and avoid the overlapping sound source signals by the PWM driving unit 7, and feed back the digital sound source signal to the control unit 5 and simultaneously The output unit 71 outputs the associated sound source signal.
而當進行音質調整時，係可以控制單元5分別對調變單元3中之積分器31、加法器32、權重產生器33及量化器34調整音源訊號之參數設定值，使音源訊號可以需求進行調變，以獲得適當之無效時間(dead time)讓音質最佳化，而達到改善音質以及提昇音質之功效。When the sound quality is adjusted, the control unit 5 can adjust the parameter settings of the sound source signal to the integrator 31, the adder 32, the weight generator 33 and the quantizer 34 in the modulation unit 3, so that the sound source signal can be adjusted. Change to get the appropriate dead time to optimize the sound quality, and to improve the sound quality and improve the sound quality.
綜上所述，本發明動態音質控制裝置可有效改善習用之種種缺點，可依所需利用控制單元自行調整音源訊號之參數設定值，以獲得適當之無效時間(dead time)使音質最佳化，而達到改善音質以及提昇音質之功效；進而使本發明之產生能更進步、更實用、更符合消費者使用之所須，確已符合發明專利申請之要件，爰依法提出專利申請。In summary, the dynamic sound quality control device of the present invention can effectively improve various shortcomings of the conventional use, and can automatically adjust the parameter setting value of the sound source signal by using the control unit to obtain an appropriate dead time to optimize the sound quality. To achieve the effect of improving the sound quality and improving the sound quality; thereby making the invention more progressive, more practical, and more in line with the needs of the consumer, it has indeed met the requirements of the invention patent application, and filed a patent application according to law.
惟以上所述者，僅為本發明之較佳實施例而已，當不能以此限定本發明實施之範圍；故，凡依本發明申請專利範圍及發明說明書內容所作之簡單的等效變化與修飾，皆應仍屬本發明專利涵蓋之範圍內。However, the above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto; therefore, the simple equivalent changes and modifications made in accordance with the scope of the present invention and the contents of the invention are modified. All should remain within the scope of the invention patent.
1‧‧‧解碼單元1‧‧‧Decoding unit
2‧‧‧內差轉換單元2‧‧‧Internal difference conversion unit
3‧‧‧調變單元3‧‧‧Modulation unit
31‧‧‧積分器31‧‧‧ integrator
32‧‧‧加法器32‧‧‧Adder
33‧‧‧權重產生器33‧‧‧weight generator
34‧‧‧量化器34‧‧‧Quantifier
4‧‧‧過濾單元4‧‧‧Filter unit
5‧‧‧控制單元5‧‧‧Control unit
6‧‧‧脈寬調變產生單元6‧‧‧ Pulse width modulation generating unit
61‧‧‧減法器61‧‧‧Subtractor
62‧‧‧斜波計數器62‧‧‧ ramp counter
7‧‧‧PWM驅動單元7‧‧‧PWM drive unit
71‧‧‧輸出單元71‧‧‧Output unit
第1圖，係本發明之基本架構示意圖。Figure 1 is a schematic diagram of the basic architecture of the present invention.
第2圖，係本發明之調變單元示意圖。Figure 2 is a schematic diagram of a modulation unit of the present invention.
1‧‧‧解碼單元1‧‧‧Decoding unit
2‧‧‧內差轉換單元2‧‧‧Internal difference conversion unit
3‧‧‧調變單元3‧‧‧Modulation unit
4‧‧‧過濾單元4‧‧‧Filter unit
5‧‧‧控制單元5‧‧‧Control unit
6‧‧‧脈寬調變產生單元6‧‧‧ Pulse width modulation generating unit
61‧‧‧減法器61‧‧‧Subtractor
62‧‧‧斜波計數器62‧‧‧ ramp counter
7‧‧‧PWM驅動單元7‧‧‧PWM drive unit
71‧‧‧輸出單元71‧‧‧Output unit
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| TW99136856A TWI421860B (en) | 2010-10-28 | 2010-10-28 | Dynamic sound quality control device |
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| Application Number | Priority Date | Filing Date | Title |
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| TW99136856A TWI421860B (en) | 2010-10-28 | 2010-10-28 | Dynamic sound quality control device |
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| Publication Number | Publication Date |
|---|---|
| TW201218189A TW201218189A (en) | 2012-05-01 |
| TWI421860B true TWI421860B (en) | 2014-01-01 |
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| TW (1) | TWI421860B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI562648B (en) * | 2014-10-29 | 2016-12-11 | Sunplus Technology Co Ltd | Sound generating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI607374B (en) * | 2017-02-10 | 2017-12-01 | 華碩電腦股份有限公司 | Calibration method and computer readable recording medium |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1278184A2 (en) * | 2001-06-26 | 2003-01-22 | Microsoft Corporation | Method for coding speech and music signals |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1278184A2 (en) * | 2001-06-26 | 2003-01-22 | Microsoft Corporation | Method for coding speech and music signals |
Non-Patent Citations (1)
| Title |
|---|
| Olivier Trescases, et al., "Predictive Efficiency Optimization for DC-DC Converters With Highly Dynamic Digital Loads," IEEE Transactions on Power Electronics, vol. 23, no. 4, July 2008 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI562648B (en) * | 2014-10-29 | 2016-12-11 | Sunplus Technology Co Ltd | Sound generating device |
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| TW201218189A (en) | 2012-05-01 |
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