CN105554637A - Method for generating EQ parameters matched with real-time frequency response curve - Google Patents
Method for generating EQ parameters matched with real-time frequency response curve Download PDFInfo
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- CN105554637A CN105554637A CN201511029225.0A CN201511029225A CN105554637A CN 105554637 A CN105554637 A CN 105554637A CN 201511029225 A CN201511029225 A CN 201511029225A CN 105554637 A CN105554637 A CN 105554637A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
- H04R2430/03—Synergistic effects of band splitting and sub-band processing
Abstract
The invention discloses a method for generating EQ parameters matched with a real-time frequency response curve. The method comprises the following steps: S10, the matching of a required number of equalization bands is carried out according to the frequency response curve; S20, a corrected frequency response curve is obtained after level correction of the frequency response curve; S30, the N<th> EQ band is selected, the maximum level point and the minimum level point are searched within a range to be compensated on the corrected frequency response curve corresponding to the N<th> EQ band, the maximum level point or the minimum level point, whichever has a larger absolute value, serves as a compensation point, the level of the compensation point serves as an EQ gain, and the frequency of the compensation point serves as a center frequency Fc; S40, through successive approximation of an amplitude-frequency curve corresponding to a Q value and the corrected frequency response curve, an amplitude-frequency curve of the EQ band, which is the closest to the corrected curve, and a Q value of the EQ band are obtained; S50, if all the EQ bands are completed, then the EQ parameter generation is completed; otherwise the corrected frequency response curve is deducted by the amplitude-frequency curve of the current EQ band to obtain a new corrected frequency response curve, and S30 is repeated to continue the EQ parameter generation for the next band. The method provided by the invention has the advantages that through the Q value successive approximation method, the matched EQ parameters can be generated in a real-time manner, so as to avoid repeated manual operations.
Description
Technical field
The present invention relates to compensating for frequency response field, be specifically related to the EQ parameter generation method of the real-time frequency response curve of a kind of adaptation.
Background technology
In actual audio equipment, all with the function of multistage EQ, different sound effects can be realized by the gain changing each frequency, many times need to compensate with one group of EQ a known frequency response curve, determine the frequency needing to compensate or decay according to this frequency response curve, the gain of which frequency needs to increase or reduce, concrete exactly according to the frequency response curve recorded, excessive crest needs to reduce, and trough then needs to increase.This just needs the upper parameter calculating EQ: the centre frequency Fc of frequency band, the value of yield value Gain and bandwidth Q, usually be all can only by artificial at graphic interface, EQ curve is manually dragged to carry out adaptation objective curve in the mode of comparison aim curve, but just helpless for the frequency response curve produced in real time.
Summary of the invention
The object of the invention is to for above-mentioned problems of the prior art, propose the EQ parameter generation method of the real-time frequency response curve of a kind of adaptation, realize the effect of adapted in real time frequency response curve.
For reaching the object of foregoing invention, the present invention is achieved through the following technical solutions:
The EQ parameter generation method of the real-time frequency response curve of a kind of adaptation, comprises the steps:
Step S10, according to the balanced hop count that frequency response curve coupling needs, represents equalizer section with EQ;
Step S20, does level correction to frequency response curve, obtains correcting frequency response curve;
Step S30, selected N section EQ, initial N gets 1, on the correction frequency response curve that N section EQ is corresponding, search in scope to be compensated and obtain level maximum point and level smallest point, and using the large person of absolute value of level maximum point and level smallest point 2 as compensation point, this compensation point level is as EQ gain, and compensation point frequency is as the centre frequency Fc of EQ;
Step S40, the initial Q value arranging EQ is the median of Q value allowed band, Q value variation delta Q is 1/4 of Q value allowed band, also include counter NUM, initial count value is the median of Q value prediction number, according to counter NUM, by the corresponding amplitude-versus-frequency curve of Q value with correct the Step wise approximation of frequency response curve, obtain this section of EQ closest to the amplitude-versus-frequency curve of calibration curve and Q value;
Step S50, if EQ hop count has reached maximum N integer, then EQ parameter has generated; Otherwise correction frequency response curve is deducted amplitude-versus-frequency curve corresponding to current EQ, obtains new correction frequency response curve, and enter the generation step that step S30 continues next section of EQ parameter.
Further, also include step S21, selected N section EQ, N is positive integer, within the scope of the frequency response curve that this section of EQ is corresponding, be averaging to obtain average level by level, more whole frequency response curve is moved to average level on level direction, then whole frequency response curve negate is obtained correcting frequency response curve.
Further, also include described step S31, after traversal search to preliminary level maximum point and preliminary level smallest point, then be less than the level range of setting threshold with the left and right sides of preliminary level maximum point searching level differences, and using this level range center as level maximum point; The level range of setting threshold is less than with the left and right sides of preliminary level smallest point searching level differences, and using this level range center as level smallest point.
Further, described setting threshold from 0.1dB to 1dB between choose a value.
Further, described step 40 according to counter NUM, by the corresponding amplitude-versus-frequency curve of Q value with correct the Step wise approximation of frequency response curve, concrete grammar is as follows:
Step S41, judging that counter NUM subtracts one and whether equals zero, is enter step S50; Otherwise calculate the first amplitude-versus-frequency curve that the Q value of current EQ is corresponding, and correction frequency response curve is deducted the first amplitude-versus-frequency curve, obtain first with reference to curve, and calculate the first uneven degree A of the first reference curve;
Step S42, the Q value calculating current EQ deducts the second amplitude-versus-frequency curve after minimum change, and correction frequency response curve is deducted the second amplitude-versus-frequency curve, obtains second with reference to curve, and calculates second with reference to the second uneven degree B of curve;
Step S43, compares the first uneven degree A and the second uneven degree B, if the first uneven degree A is larger, then the Q value of current EQ is deducted Q value variable quantity, and by Q value variable quantity divided by 2, and judge whether Q value changes, be get back to step S41, otherwise enter step S50;
Step S44, the Q value calculating current EQ adds the 3rd amplitude-versus-frequency curve of minimum change, and correction frequency response curve is deducted the second amplitude-versus-frequency curve, obtains the 3rd with reference to curve, and calculates the 3rd uneven degree C of the 3rd reference curve;
Step S45, compares the first uneven degree A and the 3rd uneven degree C, if the first uneven degree A is less, then represents and then enters step S50 by the amplitude-frequency characteristic closest correction frequency response curve that the Q value of current EQ is corresponding; Otherwise the Q value of current EQ is added Q value variable quantity, and by Q value variable quantity divided by 2, and judge whether Q value changes, and is, gets back to step S41, otherwise enter step S50.
Further, described minimum change is 0.1.
The EQ parameter generation method of the real-time frequency response curve of a kind of adaptation of the present invention, for the frequency response curve produced in real time, by the method for successive approximation of Q value, can produce the EQ parameter of adaptive frequency response curve, thus avoids artificial repeatable operation in real time.
Accompanying drawing explanation
Fig. 1 is the flow chart of steps of the EQ parameter generation method of the real-time frequency response curve of adaptation of the present invention.
Fig. 2 is the Q value Step wise approximation flow chart of the EQ parameter generation method of the real-time frequency response curve of adaptation of the present invention.
Embodiment
Be clearly and completely described the technical scheme in the embodiment of the present invention below in conjunction with drawings and Examples, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.
Referring to Fig. 1, it is the flow chart of steps of the inventive method, and the EQ parameter generation method of the real-time frequency response curve of a kind of adaptation of the present invention, comprises the steps:
The EQ parameter generation method of the real-time frequency response curve of a kind of adaptation, comprises the steps:
Step S10, according to the balanced hop count that frequency response curve coupling needs, represents equalizer section with EQ;
Step S20, does level correction to frequency response curve, obtains correcting frequency response curve;
Step S30, selected N section EQ, initial N gets 1, on the correction frequency response curve that N section EQ is corresponding, search in scope to be compensated and obtain level maximum point and level smallest point, and using the large person of absolute value of level maximum point and level smallest point 2 as compensation point, this compensation point level is as EQ gain, and compensation point frequency is as the centre frequency Fc of EQ;
Step S40, the initial Q value arranging EQ is the median of Q value allowed band, Q value variation delta Q is 1/4 of Q value allowed band, also include counter NUM, initial count value is the median of Q value prediction number, according to counter NUM, by the corresponding amplitude-versus-frequency curve of Q value with correct the Step wise approximation of frequency response curve, obtain this section of EQ closest to the amplitude-versus-frequency curve of calibration curve and Q value; The allowed band of described Q value refers to: if Q value will produce one in 32 values, then the allowed band of Q value will be 32, and the initial value of this hour counter NUM is just set to 16.
Step S50, if EQ hop count has reached maximum N integer, then EQ parameter has generated; Otherwise correction frequency response curve is deducted amplitude-versus-frequency curve corresponding to current EQ, obtains new correction frequency response curve, and enter the generation step that step S30 continues next section of EQ parameter.
Further, also include step S21, selected N section EQ, N is positive integer, within the scope of the frequency response curve that this section of EQ is corresponding, be averaging to obtain average level by level, more whole frequency response curve is moved to average level on level direction, then whole frequency response curve negate is obtained correcting frequency response curve.
Further, also include described step S31, after traversal search to preliminary level maximum point and preliminary level smallest point, then be less than the level range of setting threshold with the left and right sides of preliminary level maximum point searching level differences, and using this level range center as level maximum point; The level range of setting threshold is less than with the left and right sides of preliminary level smallest point searching level differences, and using this level range center as level smallest point.
Further, described setting threshold from 0.1dB to 1dB between choose a value, preferred 0.5dB in the present embodiment.
Further, referring to Fig. 2, be the Q value Step wise approximation flow chart of the EQ parameter generation method of the real-time frequency response curve of adaptation of the present invention, described step 40 according to counter NUM, by the corresponding amplitude-versus-frequency curve of Q value and the Step wise approximation correcting frequency response curve, concrete grammar is as follows:
Step S41, judging that counter NUM subtracts one and whether equals zero, is enter step S50; Otherwise calculate the first amplitude-versus-frequency curve that the Q value of current EQ is corresponding, and correction frequency response curve is deducted the first amplitude-versus-frequency curve, obtain first with reference to curve, and calculate the first uneven degree A of the first reference curve;
Step S42, the Q value calculating current EQ deducts the second amplitude-versus-frequency curve after minimum change, and correction frequency response curve is deducted the second amplitude-versus-frequency curve, obtains second with reference to curve, and calculates second with reference to the second uneven degree B of curve;
Step S43, compares the first uneven degree A and the second uneven degree B, if the first uneven degree A is larger, then the Q value of current EQ is deducted Q value variable quantity, and by Q value variable quantity divided by 2, and judge whether Q value changes, be get back to step S41, otherwise enter step S50;
Step S44, the Q value calculating current EQ adds the 3rd amplitude-versus-frequency curve of minimum change, and correction frequency response curve is deducted the second amplitude-versus-frequency curve, obtains the 3rd with reference to curve, and calculates the 3rd uneven degree C of the 3rd reference curve;
Step S45, compares the first uneven degree A and the 3rd uneven degree C, if the first uneven degree A is less, then represents and then enters step S50 by the amplitude-frequency characteristic closest correction frequency response curve that the Q value of current EQ is corresponding; Otherwise the Q value of current EQ is added Q value variable quantity, and by Q value variable quantity divided by 2, and judge whether Q value changes, and is, gets back to step S41, otherwise enter step S50.
Further, the described minimum change of the present embodiment is preferably 0.1.
Above-described embodiment only in order to the present invention is described and and unrestricted technical scheme described in the invention; Therefore, although this specification with reference to each above-mentioned embodiment to present invention has been detailed description, those of ordinary skill in the art should be appreciated that and still can modify to the present invention or equivalent to replace; And all do not depart from technical scheme and the improvement thereof of the spirit and scope of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (6)
1. the EQ parameter generation method of the real-time frequency response curve of adaptation, is characterized in that, comprise the steps:
Step S10, according to the balanced hop count that frequency response curve coupling needs, represents equalizer section with EQ;
Step S20, does level correction to frequency response curve, obtains correcting frequency response curve;
Step S30, selected N section EQ, initial N gets 1, on the correction frequency response curve that N section EQ is corresponding, search in scope to be compensated and obtain level maximum point and level smallest point, and using the large person of absolute value of level maximum point and level smallest point 2 as compensation point, this compensation point level is as EQ gain, and compensation point frequency is as the centre frequency Fc of EQ;
Step S40, the initial Q value arranging EQ is the median of Q value allowed band, Q value variation delta Q is 1/4 of Q value allowed band, also include counter NUM, initial count value is the median of Q value prediction number, according to counter NUM, by the corresponding amplitude-versus-frequency curve of Q value with correct the Step wise approximation of frequency response curve, obtain this section of EQ closest to the amplitude-versus-frequency curve of calibration curve and Q value;
Step S50, if EQ hop count has reached maximum N integer, then EQ parameter has generated; Otherwise correction frequency response curve is deducted amplitude-versus-frequency curve corresponding to current EQ, obtains new correction frequency response curve, and enter the generation step that step S30 continues next section of EQ parameter.
2. the EQ parameter generation method of the real-time frequency response curve of adaptation according to claim 1, it is characterized in that, also include step S21, selected N section EQ, N is positive integer, within the scope of the frequency response curve that this section of EQ is corresponding, be averaging to obtain average level by level, more whole frequency response curve is moved to average level on level direction, then whole frequency response curve negate is obtained correcting frequency response curve.
3. the EQ parameter generation method of the real-time frequency response curve of adaptation according to claim 1 and 2, it is characterized in that, also include described step S31, after traversal search to preliminary level maximum point and preliminary level smallest point, the level range of setting threshold is less than again with the left and right sides of preliminary level maximum point searching level differences, and using this level range center as level maximum point; The level range of setting threshold is less than with the left and right sides of preliminary level smallest point searching level differences, and using this level range center as level smallest point.
4. the EQ parameter generation method of the real-time frequency response curve of adaptation according to claim 3, is characterized in that, described setting threshold from 0.1dB to 1dB between choose a value.
5. the EQ parameter generation method of the real-time frequency response curve of adaptation according to claim 4, is characterized in that, described step 40 according to counter NUM, by the corresponding amplitude-versus-frequency curve of Q value with correct the Step wise approximation of frequency response curve, concrete grammar is as follows:
Step S41, judging that counter NUM subtracts one and whether equals zero, is enter step S50; Otherwise calculate the first amplitude-versus-frequency curve that the Q value of current EQ is corresponding, and correction frequency response curve is deducted the first amplitude-versus-frequency curve, obtain first with reference to curve, and calculate the first uneven degree A of the first reference curve;
Step S42, the Q value calculating current EQ deducts the second amplitude-versus-frequency curve after minimum change, and correction frequency response curve is deducted the second amplitude-versus-frequency curve, obtains second with reference to curve, and calculates second with reference to the second uneven degree B of curve;
Step S43, compares the first uneven degree A and the second uneven degree B, if the first uneven degree A is larger, then the Q value of current EQ is deducted Q value variable quantity, and by Q value variable quantity divided by 2, and judge whether Q value changes, be get back to step S41, otherwise enter step S50;
Step S44, the Q value calculating current EQ adds the 3rd amplitude-versus-frequency curve of minimum change, and correction frequency response curve is deducted the second amplitude-versus-frequency curve, obtains the 3rd with reference to curve, and calculates the 3rd uneven degree C of the 3rd reference curve;
Step S45, compares the first uneven degree A and the 3rd uneven degree C, if the first uneven degree A is less, then represents and then enters step S50 by the amplitude-frequency characteristic closest correction frequency response curve that the Q value of current EQ is corresponding; Otherwise the Q value of current EQ is added Q value variable quantity, and by Q value variable quantity divided by 2, and judge whether Q value changes, and is, gets back to step S41, otherwise enter step S50.
6. the EQ parameter generation method of the real-time frequency response curve of adaptation according to claim 5, is characterized in that, described minimum change is 0.1.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106817656A (en) * | 2017-03-22 | 2017-06-09 | 维沃移动通信有限公司 | A kind of outer method and mobile terminal for putting sound system audio calibration |
| CN107071680A (en) * | 2017-04-19 | 2017-08-18 | 歌尔科技有限公司 | A kind of tuning method and apparatus of acoustic product |
| CN107978319A (en) * | 2016-10-24 | 2018-05-01 | 北京东方广视科技股份有限公司 | A kind for the treatment of method and apparatus of voice data |
| CN108111956A (en) * | 2017-12-26 | 2018-06-01 | 广州励丰文化科技股份有限公司 | A kind of sound equipment adjustment method and device based on amplitude-frequency response |
| CN109379690A (en) * | 2018-11-09 | 2019-02-22 | 歌尔股份有限公司 | Earphone quality detecting method, device and computer readable storage medium |
| CN109995941A (en) * | 2019-03-27 | 2019-07-09 | 腾讯音乐娱乐科技（深圳）有限公司 | A kind of data adjustment method, equipment and storage medium |
| CN111356064A (en) * | 2020-03-12 | 2020-06-30 | 广州天逸电子有限公司 | EQ parameter generation method adaptive to real-time frequency response curve |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107978319A (en) * | 2016-10-24 | 2018-05-01 | 北京东方广视科技股份有限公司 | A kind for the treatment of method and apparatus of voice data |
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| CN108111956A (en) * | 2017-12-26 | 2018-06-01 | 广州励丰文化科技股份有限公司 | A kind of sound equipment adjustment method and device based on amplitude-frequency response |
| CN109379690A (en) * | 2018-11-09 | 2019-02-22 | 歌尔股份有限公司 | Earphone quality detecting method, device and computer readable storage medium |
| CN109995941A (en) * | 2019-03-27 | 2019-07-09 | 腾讯音乐娱乐科技（深圳）有限公司 | A kind of data adjustment method, equipment and storage medium |
| CN111356064A (en) * | 2020-03-12 | 2020-06-30 | 广州天逸电子有限公司 | EQ parameter generation method adaptive to real-time frequency response curve |
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Application publication date: 20160504 |