CN1719946A - Passive electroacoustic apparatus and its playback method - Google Patents
Passive electroacoustic apparatus and its playback method Download PDFInfo
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- CN1719946A CN1719946A CN 200510079810 CN200510079810A CN1719946A CN 1719946 A CN1719946 A CN 1719946A CN 200510079810 CN200510079810 CN 200510079810 CN 200510079810 A CN200510079810 A CN 200510079810A CN 1719946 A CN1719946 A CN 1719946A
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Abstract
This invention relates to a passive electric-sound device and a playing device including a playing device and an earphone, among which, the earphone stores an inclusive chip with the electronic acoustic property parameters of frequency response, pulse response, flexibility, frequency-impedance curves, resonance frequency and the maximum sound pressure. The inclusive chip is connected with the PSP of the playing device, DSP fetches data information for the earphone property parameters in the chip, comparing the audio property parameter of the playing signals to regulate the playing signals with the result to finish transmission and play of sound.
Description
Technical field
The present invention relates to the digital audio technology field, particularly a kind of passive electroacoustic apparatus and audio playback method thereof.
Background technology
At present, in the digital audio product, traditional acoustoelectronic device does not almost have technological improvement, people use still since 1910 same loudspeaker design pattern (with voice coil attached on the vibrating diaphragm, be suspended in the gap, magnetic field that constitutes by strong magnet and metal frame), identical microphone (moving-coil type, capacitor-type or silk ribbon formula) and identical earphone (also claiming insert earphone, is the loud speaker of a miniaturization), basic principle never changed.A lot of people attempt to make its performance to change to some extent: such as, the earphone transducer.It produces stronger magnet with rare element, make film special geometry, as thin as a wafer and keep certain mechanical strength, with strict production technology and hand skill to reach the acoustics of expection.Even so, effect still greatly differs from each other apart from perfection, and the result but is the costliness of price, is very usual from hundreds of to one on several thousand U.S. dollars.
The method that improves speaker performance has three kinds:
1. loud speaker and its supporting measurement update electronic installation are sold together.When using loud speaker, measure its performance, in time the parameter of loud speaker is carried out the scene and revise, reach good playback effect with supporting electronic installation.Its shortcoming is that the electronic installation of loud speaker and measurement must be supporting, if the user will buy loud speaker, supporting electronic installation must be bought together, and this has increased cost undoubtedly.
2. to active loud speaker, as audio amplifier, after its parameter measurement come out, be put into internal system, call at any time.Its shortcoming is that loud speaker must be active, and to passive loud speaker, the method is just invalid.
3. loud speaker is equipped with automatic loudness of a sound weakening system.Carry out the measurement of parameter according to the environment that uses when using, do the adjustment in space again.This method is reasonable comparatively speaking, but its shortcoming is:
A. measurement parameter is strongly professional, need measure different spaces and environment, and the physical parameter and the spatial parameter of loudspeaker counted the weakening system simultaneously, has increased complexity, is not easy to meet the demands simultaneously, general user's operating difficulties.
B. can't be applicable to earphone, only be applicable to loudspeaker.
Summary of the invention
The objective of the invention is to overcome the above-mentioned defective of known technology, provide a kind of cost low, simple and convenient user operation, the passive electroacoustic apparatus that the playback quality is high.
For achieving the above object, passive electroacoustic apparatus of the present invention, comprise tone playing equipment and the Passive earphone that links to each other with tone playing equipment by audio signal cable and plug connector, wherein, tone playing equipment comprise digital signal processing unit and with its first data transaction that links to each other respectively and power output unit, second data transaction and power output unit and data communication units; The audio signal cable is provided with first transmission line that is used to transmit the L channel audio frequency, second transmission line and the common ground that is used to transmit right audio channel; The output of first data transaction and power output unit is connected to first transmission line, and the output of second data transaction and power output unit is connected to second transmission line, and data communication units links to each other respectively with second transmission line with first transmission line; Earphone is provided with a memory chip, and first transmission line links to each other with the clock end of chip by first capacitor, and second transmission line links to each other with the data terminal of chip; The loudspeaker of left and right sound channels link to each other respectively in first transmission line and second transmission line and the earphone, and the power end of chip links to each other with common ground by second capacitor.
Passive electroacoustic apparatus of the present invention, wherein said memory chip are provided with forward and are connected on first diode between clock end and the power end and negative sense and are connected on second diode between clock end and the ground terminal.
Passive electroacoustic apparatus of the present invention, the acoustoelectronic characterisitic parameter information of wherein said memory chip storage comprises frequency response, impulse response, sensitivity, frequency-impedance curve, resonance frequency and maximum sound pressure.
Passive electroacoustic apparatus of the present invention, wherein said earphone are passive earphone, loud speaker or audio amplifier.
Passive electroacoustic apparatus of the present invention, wherein said tone playing equipment are the CD/MD/MP3 player.
Another object of the present invention provides a kind of audio playback method of passive electroacoustic apparatus.
For reaching this purpose, the audio playback method of passive electroacoustic apparatus of the present invention, store and read the parameter of passive electroacoustic apparatus respectively by the digital signal processing unit that is arranged on memory chip in the Passive earphone and tone playing equipment, and by described digital signal processing unit the playback signal of described tone playing equipment is implemented real-time/non real-time and calculate and the linear/non-linear adjustment, and adjusted playback signal transferred to described Passive earphone, the sequence of operation of described digital signal processing unit storage is carried out following steps:
1) at first, the acoustic characteristic parameter with described earphone stores in the memory chip of earphone with digital information;
2) when described earphone connects tone playing equipment, described tone playing equipment clock signal is given described earphone chip, simultaneously by the power supply of this clock signal realization to the earphone chip;
3) described earphone chip output audio characterisitic parameter is given described digital signal processing unit;
4) described digital signal processing unit confirms whether the earphone parameter that obtains is correct, if the result is for being the clock signal of the described earphone chip of sever supply and execution in step 5), if the result returns step 3) for not;
5) described digital signal processing unit is compared the acoustic characteristic parameter of playback signal according to the characterisitic parameter of earphone, and adjusts the acoustic characteristic parameter of described playback signal with the result of comparison;
6) adjusted playback signal is transferred to earphone, finishes playback.
The audio playback method of passive electroacoustic apparatus of the present invention, wherein said digital signal processing unit with the user select in real time/the non real-time algorithm compares and the linear/non-linear adjustment to the characterisitic parameter of the earphone that obtains, wherein, the linear adjustment comprises that finite impulse response, infinite impulse response filtering or fast convolution, non-linear adjustment comprise automatic gain control, volume compression and waveform shaping.
The audio playback method of passive electroacoustic apparatus of the present invention, wherein said linear/non-linear adjustment is applicable to the tone playing equipment of monophony, stereo channel or multichannel and passive earpiece/speaker/audio amplifier.
The advantage of passive electroacoustic apparatus of the present invention and audio playback method thereof is: owing to adopted the acoustic characteristic with earphone to store in the memory chip with digitized parameter, and voice signal is handled by the digital signal processing unit of tone playing equipment, make earphone reach best playback effect, it is with low cost, simple and convenient user operation, playback quality height.
Be elaborated with reference to accompanying drawing below in conjunction with embodiment, so that purpose of the present invention, feature and advantage are had deep understanding.
Description of drawings
Fig. 1 is the outline drawing of Passive earphone in the passive electroacoustic apparatus of the present invention;
Fig. 2 is the schematic diagram of Passive earphone plug in the passive electroacoustic apparatus of the present invention;
Fig. 3 is the signal schematic representation of Passive earphone plug when transmitting audio data among Fig. 2;
Fig. 4 is the signal schematic representation of Passive earphone plug when reading the memory chip data among Fig. 2;
Fig. 5 is the structural representation of passive electroacoustic apparatus of the present invention;
Fig. 6 is the structural representation of memory chip among Fig. 5;
Fig. 7 is the flow chart of passive electroacoustic apparatus audio playback method of the present invention.
Embodiment
Describe the embodiment of passive electroacoustic apparatus of the present invention in detail below in conjunction with accompanying drawing.
With reference to Fig. 1 and Fig. 5, passive electroacoustic apparatus of the present invention is a kind of passive electroacoustic apparatus that has memory chip, comprise tone playing equipment 1 and the earphone 2 that links to each other with tone playing equipment 1, earphone 2 is provided with memory chip 3, memory chip 3 links to each other by the cable of connection tone playing equipment or the digital signal processing unit 10 (Digital Signal Processing Unit calls DSP in the following text) of audio signal plug connector and tone playing equipment 1.Briefly, passive electroacoustic apparatus of the present invention is earlier earphone 2 to be analyzed, and finds out its characteristic and also represents and record with digitized parameter, store in the memory chip 3, like this, in playback, just can handle the playback signal, reach best playback effect according to these characteristics.
In an embodiment of the present invention, tone playing equipment 1 is MP3 (or CD, a MD) player, and earphone 2 is passive earphone.In other embodiments, also can be passive loud speaker or audio amplifier.With reference to Fig. 1, earphone 2 is equipped with a small memory chip 3 in its 3.5 millimeters plugs, the acoustoelectronic characterisitic parameter information of memory chip 3 storages comprises frequency response, impulse response, sensitivity, frequency-impedance curve (Impedance with respect to frequency), resonance frequency (fo), maximum sound pressure (maximum Sound Pressure Level).
In an embodiment of the present invention, with reference to Fig. 1-Fig. 5, tone playing equipment 1 comprises DSP, and with its first data transaction that links to each other respectively and power output unit 11, second data transaction and power output unit 12 and data communication units 13.The audio signal cable is provided with the first transmission line a that is used to transmit the L channel audio frequency, the second transmission line b and the common ground c that is used to transmit right audio channel.The output of first data transaction and power output unit 11 is connected to the first transmission line a, and the output of second data transaction and power output unit 12 is connected to the second transmission line b, and data communication units 13 links to each other respectively with the second transmission line b with the first transmission line a.The first transmission line a links to each other with the clock end of memory chip 3 by the first capacitor C1, and the second transmission line b links to each other with the data terminal of memory chip 3.The loudspeaker of left and right sound channels link to each other respectively in the first transmission line a and the second transmission line b and the earphone, and the power end of memory chip 3 links to each other with common ground c by the second capacitor C2.
Embodiments of the invention with reference to Fig. 6, are provided with forward and are connected on the first diode D1 between clock end and the power end and negative sense and are connected on the second diode D2 between clock end and the ground terminal in the memory chip 3.Commutated network D1, the D2 that the first diode D1 and the second diode D2 form is as the power supply of memory chip 3, and it is output as power end VDD.The part of the power supply of earphone chip except that the first capacitor C1 and the second capacitor C2 all has been made in the earphone chip.
The course of work of passive electroacoustic apparatus of the present invention is described below with reference to Fig. 5 and Fig. 6:
At first the process of earphone characterisitic parameter is transmitted in explanation.Send AC signal (square wave) by the data communication units of tone playing equipment 1, i.e. clock signal, this signal is the high-frequency signal of frequency 1.5MHz, transfers to earphone 2.Because the frequency range that people's ear can be heard is 20Hz-20kHz, and be unheard for the sound outside this frequency range, so, when frequency is the square-wave signal of 1.5MHz when reaching earphone, can't hear any sound in the left and right acoustic channels earphone., this high-frequency signal transfers to earphone chip 3 via the first transmission line a, and through the filtering of the first capacitor C1, clock signal becomes direct current, gives the Passive earphone chip power supply as supply voltage VDD.After treating this signal stabilization, earphone chip 3 is exported to DSP by the second transmission line b with the earphone characterisitic parameter of storage, then the parameter that obtains of DSP verification errorless after, will break and turn the clock signal of earphone chip output, the power supply of the earphone chip that also just broken.
Besides the process of bright playback.After DSP obtained characterisitic parameter about earphone, DSP can regulate the playback signal automatically according to these characterisitic parameters, then the playback signal after regulating was passed to earphone and emitted sound.When the playback signal reaches earphone 2, because the frequency range of playback signal is between 20-20kHz, when this low frequency signal is transferred to earphone chip 3 through the first transmission line a, can be depleted through signal energy after the first capacitor C1, so can't give chip 3 power supplies, promptly in playback, earphone chip 3 is in the idle state of outage, and the playback signal can directly be emitted sound via the earphone left and right sound channels.When earphone is connected to tone playing equipment and this tone playing equipment and is starting shooting, the information of earphone all will be sent to equipment, tone playing equipment will dispose among the inner DSP relevant parameter with the specific earphone that is connected automatically, and all work are all finished automatically, need not user's intervention.
With reference to Fig. 7, the following describes the audio playback method of passive electroacoustic apparatus of the present invention.
At first, the acoustic characteristic parameter of described earphone is stored into (step 1) in the memory chip of earphone with digital information.When earphone connects the MP3 player, MP3 player clock signal is given the earphone chip, simultaneously by the power supply (step 2) of this clock signal realization to the earphone chip, then, earphone chip output audio characterisitic parameter give described DSP (step 3), the DSP of MP3 player reads in the memory chip about the digital information of earphone characterisitic parameter, confirms whether the earphone parameter that obtains correct, if the result is for being the clock signal of the described earphone chip of sever supply; If the result reads the digital information (step 4) in the memory chip again for not.When analyzing the acoustic characteristic parameter of tone playing equipment output sound signal, DSP compares the acoustic characteristic parameter of playback signal according to the characterisitic parameter of earphone, and adjusts the acoustic characteristic parameter (step 5) of described playback signal with the result of comparison.At last, adjusted playback signal is transferred to earphone, finishes playback (step 6).
DSP is when analyzing the acoustic characteristic parameter of tone playing equipment output sound signal, the real-time or non real-time algorithm of selecting with the user is compared and linear or non-linear adjustment to the characterisitic parameter of the earphone that obtains, wherein, the linear adjustment comprises that finite impulse response (FIR), infinite impulse response (IIR) filtering or fast convolution, non-linear adjustment comprise automatic gain control, volume compression and waveform shaping.
In audio playback method of the present invention, the linear/non-linear adjustment is applicable to the tone playing equipment of monophony, stereo channel or multichannel and passive earpiece/speaker/audio amplifier.Owing to there are not other supporting electronic installations, it is with low cost, simple and convenient user operation, and its playback quality height, and finish automatically.
Claims (8)
1. passive electroacoustic apparatus, comprise tone playing equipment (1) and the Passive earphone (2) that links to each other with described tone playing equipment (1) by audio signal cable and plug connector, it is characterized in that: wherein, described tone playing equipment (1) comprise digital signal processing unit (10) and with its first data transaction that links to each other respectively and power output unit (11), second data transaction and power output unit (12) and data communication units (13); Described audio signal cable is provided with first transmission line (a) that is used to transmit the L channel audio frequency, second transmission line (b) and the common ground (c) that is used to transmit right audio channel; The output of described first data transaction and power output unit (11) is connected to described first transmission line (a), the output of described second data transaction and power output unit (12) is connected to described second transmission line (b), and described data communication units (13) links to each other respectively with second transmission line (b) with described first transmission line (a); One memory chip (3) is set in the described earphone (2), and described first transmission line (a) links to each other with the clock end of described chip (3) by first capacitor (C1), and described second transmission line (b) links to each other with the data terminal of described chip (3); Described first transmission line (a) links to each other respectively with the loudspeaker of second transmission line (b) with the interior left and right sound channels of described earphone (2), and the power end of described chip (3) links to each other with described common ground (c) by second capacitor (C2).
2. passive electroacoustic apparatus according to claim 1 is characterized in that: wherein said memory chip (3) is provided with forward and is connected on first diode (D1) between clock end and the power end and negative sense and is connected on second diode (D2) between clock end and the ground terminal.
3. passive electroacoustic apparatus according to claim 1 and 2 is characterized in that: the acoustoelectronic characterisitic parameter information of wherein said memory chip (3) storage comprises frequency response, impulse response, sensitivity, frequency-impedance curve, resonance frequency and maximum sound pressure.
4. passive electroacoustic apparatus according to claim 3 is characterized in that: wherein said Passive earphone (2) replaces with passive loud speaker or audio amplifier.
5. passive electroacoustic apparatus according to claim 4 is characterized in that: wherein said tone playing equipment is the CD/MD/MP3 player.
6. the audio playback method of a passive electroacoustic apparatus, store and read the parameter of passive electroacoustic apparatus respectively by the digital signal processing unit that is arranged on memory chip in the Passive earphone and tone playing equipment, and by described digital signal processing unit the playback signal of described tone playing equipment is implemented real-time/non real-time and calculate and the linear/non-linear adjustment, and adjusted playback signal transferred to described Passive earphone, the sequence of operation of described digital signal processing unit storage is carried out following steps:
1) at first, the acoustic characteristic parameter with described earphone stores in the memory chip of earphone with digital information;
2) when described earphone connects tone playing equipment, described tone playing equipment clock signal is given described earphone chip, simultaneously by the power supply of this clock signal realization to the earphone chip;
3) described earphone chip output audio characterisitic parameter is given described digital signal processing unit;
4) described digital signal processing unit confirms whether the earphone parameter that obtains is correct, if the result is for being the clock signal of the described earphone chip of sever supply and execution in step 5), if the result returns step 3) for not;
5) described digital signal processing unit is compared the acoustic characteristic parameter of playback signal according to the characterisitic parameter of earphone, and adjusts the acoustic characteristic parameter of described playback signal with the result of comparison;
6) adjusted playback signal is transferred to earphone, finishes playback.
7. audio playback method according to claim 6, it is characterized in that: wherein said digital signal processing unit with the user select in real time/the non real-time algorithm compares and the linear/non-linear adjustment to the characterisitic parameter of the earphone that obtains, wherein, the linear adjustment comprises that finite impulse response, infinite impulse response filtering or fast convolution, non-linear adjustment comprise automatic gain control, volume compression and waveform shaping.
8. audio playback method according to claim 7 is characterized in that: wherein said linear/non-linear adjustment is applicable to the tone playing equipment of monophony, stereo channel or multichannel and passive earpiece/speaker/audio amplifier.
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| CNB2005100798101A CN100518384C (en) | 2005-06-29 | 2005-06-29 | Passive electroacoustic apparatus and its playing method |
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| CNB2005100798101A CN100518384C (en) | 2005-06-29 | 2005-06-29 | Passive electroacoustic apparatus and its playing method |
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| CN1719946A true CN1719946A (en) | 2006-01-11 |
| CN100518384C CN100518384C (en) | 2009-07-22 |
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| CN101820697A (en) * | 2009-02-27 | 2010-09-01 | 捷讯研究有限公司 | Method and system for controlling a maximum signal level output to headphones coupled to a wireless device |
| CN101945314A (en) * | 2010-10-02 | 2011-01-12 | 张沈平 | A kind of earphone, corresponding audiogenic device and control method |
| CN101964932A (en) * | 2010-10-22 | 2011-02-02 | 张沈平 | Sound source equipment and control method |
| WO2011069439A1 (en) * | 2009-12-10 | 2011-06-16 | Chen Xiaoli | Earphone with passive sound effect adjustment function |
| CN102348144A (en) * | 2010-06-15 | 2012-02-08 | 索尼公司 | Reproduction device and reproduction method |
| CN102884797A (en) * | 2010-03-04 | 2013-01-16 | Thx有限公司 | Electronic adapter unit for selectively modifying audio or video data for use with an output device |
| CN101558659B (en) * | 2006-05-22 | 2013-02-13 | 奥迪欧彼塞尔斯有限公司 | Volume and tone control in direct digital speakers |
| CN103916798A (en) * | 2014-04-09 | 2014-07-09 | 李昂 | Automatic sound effect identifying system of headphone |
| CN103986999A (en) * | 2014-04-14 | 2014-08-13 | 小米科技有限责任公司 | Method, device and terminal equipment for detecting earphone impedance |
| CN105763991A (en) * | 2010-10-02 | 2016-07-13 | 张沈平 | Earphone, corresponding sound source device and control method |
| CN105763990A (en) * | 2010-10-02 | 2016-07-13 | 张沈平 | Earphone, corresponding sound source device and control method |
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| CN101558659B (en) * | 2006-05-22 | 2013-02-13 | 奥迪欧彼塞尔斯有限公司 | Volume and tone control in direct digital speakers |
| CN101820697B (en) * | 2009-02-27 | 2014-12-17 | 黑莓有限公司 | Method and system for controlling a maximum signal level output to headphones coupled to a wireless device |
| CN101820697A (en) * | 2009-02-27 | 2010-09-01 | 捷讯研究有限公司 | Method and system for controlling a maximum signal level output to headphones coupled to a wireless device |
| WO2011069439A1 (en) * | 2009-12-10 | 2011-06-16 | Chen Xiaoli | Earphone with passive sound effect adjustment function |
| CN102884797A (en) * | 2010-03-04 | 2013-01-16 | Thx有限公司 | Electronic adapter unit for selectively modifying audio or video data for use with an output device |
| CN102348144B (en) * | 2010-06-15 | 2016-06-29 | 索尼公司 | Reproduction equipment and reproducting method |
| CN102348144A (en) * | 2010-06-15 | 2012-02-08 | 索尼公司 | Reproduction device and reproduction method |
| CN105763990A (en) * | 2010-10-02 | 2016-07-13 | 张沈平 | Earphone, corresponding sound source device and control method |
| CN105763991A (en) * | 2010-10-02 | 2016-07-13 | 张沈平 | Earphone, corresponding sound source device and control method |
| CN101945314A (en) * | 2010-10-02 | 2011-01-12 | 张沈平 | A kind of earphone, corresponding audiogenic device and control method |
| CN105898641A (en) * | 2010-10-02 | 2016-08-24 | 张沈平 | Earphones, corresponding sound source equipment and control method |
| CN105933811A (en) * | 2010-10-02 | 2016-09-07 | 张沈平 | Earphones, corresponding sound source device and control method |
| CN105933811B (en) * | 2010-10-02 | 2018-11-20 | 广州市智专信息科技有限公司 | A kind of earphone, corresponding audiogenic device and control method |
| CN101945314B (en) * | 2010-10-02 | 2019-08-02 | 广州市智专信息科技有限公司 | A kind of earphone, corresponding audiogenic device and control method |
| CN110278508A (en) * | 2010-10-02 | 2019-09-24 | 广州市智专信息科技有限公司 | A kind of audiogenic device and its control method, earphone |
| CN101964932A (en) * | 2010-10-22 | 2011-02-02 | 张沈平 | Sound source equipment and control method |
| CN103916798A (en) * | 2014-04-09 | 2014-07-09 | 李昂 | Automatic sound effect identifying system of headphone |
| CN103986999A (en) * | 2014-04-14 | 2014-08-13 | 小米科技有限责任公司 | Method, device and terminal equipment for detecting earphone impedance |
| CN103986999B (en) * | 2014-04-14 | 2018-11-30 | 小米科技有限责任公司 | A kind of method, apparatus and terminal device of test earphone impedance |
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