KR100849086B1 - Auto compass cancellation apparatus adapted for the various spatial scenes - Google Patents

Abstract

The automatic sound range control device of the sound apparatus includes an input matching unit for performing an input matching to prevent balance and overresponse of at least one input signal from at least one microphone according to a volume analysis signal, and an output matching unit output from the input matching unit. A sound range controller for automatically correcting and outputting an audible frequency phase and sound range control portion for each channel of at least one or more signals within a range that does not affect a tone according to a feedback sound controlled signal, and at least one output from the sound range controller Analyze the volume of each of the above signals to output to the input matching unit, and analyzes the sound range and tone of each of the at least one signal output from the sound range control unit and controls the feedback sound and outputs to the sound range control unit And a feedback sound control unit.

Description

AUTO COMPASS CANCELLATION APPARATUS ADAPTED FOR THE VARIOUS SPATIAL SCENES}

1 is a view showing an embodiment of an automatic sound range control apparatus for an acoustic device according to the present invention;

FIG. 2 is a diagram illustrating a detailed configuration of the input matching unit of FIG. 1. FIG.

3 is a diagram illustrating a detailed configuration of a sound range controller of FIG.

4 is a diagram illustrating a detailed configuration of a feedback controller of FIG.

5 is a view showing another embodiment of an automatic sound range control device for an acoustic device according to the present invention;

Figure 6 is a view showing the detailed configuration of the space control unit of FIG.

FIG. 7 is a diagram showing the detailed configuration of the signal synthesis processing section of FIG.

FIG. 8 is a diagram showing the detailed configuration of the selective signal mixing processing unit of FIG.

Explanation of symbols for main parts of the drawings

110: input matching unit 120: sound range control unit

130: volume analysis unit 140: feedback sound control unit

210: input characteristic / space designation 220: output conditional

230: space control unit 240: signal synthesis unit

250: sorting signal mixing processing unit

The present invention relates to an automatic range control apparatus for an acoustic apparatus, and more particularly, to an automatic range control apparatus for an acoustic apparatus for outputting a clear tone by controlling a feedback sound including a howling from at least one or more micro-input signals. It is about.

In general, a signal removal method generated between an input signal and an output signal is divided into a manual method and an automatic method. Among them, the passive method removes a specific frequency by using an equalizer. In the case of a multi-stage equalizer, it is best to control the audible frequency by 30 bands. In this case, there is a problem that the tone modulation and volume of the original sound are reduced by 1/3 octave performance. The hardware can be configured for 1/15 octave performance for specific frequency rejection, but there is a limit of 8 bands. In this case, performance is better than 1/3 octave, but there is still a problem in tone. In a narrow place, there is a lot of space and reflection depending on the environment, which is difficult to adjust, and it is not a performance to handle everything. In the case of the automatic method, it is an automatic method that is performed under limited conditions rather than completely automatic, and the processing method that obtains the sound level only from the howling to match the volume level and the echo function is also problematic in the original sound implementation, and there is a limitation in the howling process. . In other words, a strong howling or a large number of reflection howling cannot be controlled.

For example, Korean Patent Application No. 0167725 discloses a "howling removal device". In this case, in order to amplify the microphone signal and detect the howling cause signal, the detection of howling in the input signal is performed only at the volume level.In this case, there is no alternative to the reflected sound which is a complex howling for the purpose of simple howling processing. There is no way to maintain the tone. In addition, it can be seen that the processed signal modulates the sound instead of the original sound implementation method by activating the echo effect in all audible frequency bands. In the case of using a method of obtaining a frequency characteristic and removing a frequency corresponding thereto, for example, Korean Patent Application No. 0260224 discloses a "howling prevention device". In this case, the noise is generated artificially to reduce the gain of the frequency corresponding to the noise peak, not a detailed analysis, but a method including a certain area affects the tone and volume other than howling. In addition, it is not automatically removed from the natural space, but is processed by an artificial method, so that space adaptation time and input induced sound and feedback sound are not processed. Accordingly, in case of an input system having a specific input characteristic, the tone deterioration due to sound removal cannot be prevented. In the case of the system implemented according to the existing method, the limit of automatic processing is up to 8 points, and it cannot handle a large amount of elements generated in a narrow space, and it is possible to solve problems in terms of tone and volume with 1/10 octave performance. Have In other words, it can be seen that there is a problem in frequency resolution during automatic processing.

Accordingly, the present invention has been made to solve the above problems, and provides an automatic sound range control apparatus of an acoustic device for outputting a clear tone by controlling a feedback sound including a howling from at least one micro-input signal. Its purpose is to.

In addition, the present invention automatically controls only the unnecessary sound of the space, the reflection sound changed according to the environment between the input signal and the output signal without affecting the tone of the at least one or more micro-input signal, while at the same time feedback sound and input sound Another object of the present invention is to provide an automatic sound range control device of an acoustic device for distinguishing and outputting a clear tone.

A feature of the automatic sound range control apparatus of the acoustic device according to the present invention for achieving the above object is, input matching for maintaining balance and overresponse of at least one or more input signals from at least one microphone according to the volume analysis signal An input matching unit performing a; A sound range control unit for automatically correcting and outputting an audible frequency phase and sound range control portion for each channel of at least one signal output from the input matching unit in a range not affecting a tone according to a feedback sound controlled signal; A volume analyzer for analyzing a volume of each of the one or more signals output from the tone controller and outputting the volume to the input matching unit; And a feedback sound control unit configured to analyze a sound range and a tone of each of the at least one signals output from the sound range control unit, and then output a feedback sound to the sound range control unit.

In addition, in the automatic sound range control apparatus of the acoustic device according to the present invention, the input matching unit comprises: a balance maintaining unit for maintaining balance for the at least one or more input signals according to the volume analysis signal output from the volume analyzer; And a limiter which prevents overresponse to a plurality of input signals balanced by the balance maintaining unit according to the volume analysis signal output from the volume analyzer.

In addition, in the automatic sound range control apparatus of the acoustic apparatus according to the present invention, the balance maintaining unit maintains a predetermined balance corresponding to the input signal in order to adjust the microphone-specific characteristics of the at least one input signal input from the at least one microphone. It involves computing a value.

In addition, in the automatic sound range control apparatus of the acoustic apparatus according to the present invention, the limiter includes removing at least one balanced signal output from the balance maintaining unit by limiting a value below a predetermined decibel to remove an overresponse. .

In addition, in the automatic sound range control apparatus of the acoustic device according to the present invention, the sound range control unit may include a phase and sound range control portion of an audible frequency for each channel of at least one input signal output from the input matching unit in the feedback sound control unit. And at least one variable filter block for automatically correcting and outputting the feedback feedback sound in a range that does not affect the timbre according to the controlled signal.

The variable filter block may include a high pass filter, a low pass filter, a band pass filter, a band pass filter, and the like according to a feedback sound controlled signal output from the feedback sound control unit. It is used to any one of the band distortion filter.

In addition, in the automatic sound range control apparatus of the acoustic device according to the present invention, the feedback sound control unit analyzes a response characteristic for analyzing a plurality of maximum values according to harmonics by spectralizing at least one or more signals output from the sound range control unit on an audible frequency. part; A transliteration position determination unit for determining a center frequency based on an audible frequency position within the analysis threshold point and a double maximum value of the distribution of a plurality of maximum values according to harmonics output from the response characteristic analyzer; A tone analyzer for analyzing a tone with information of a harmonic portion and a harmonic portion that do not change based on time and frequency distribution of the audible frequency of at least one signal output from the sound range controller; A tone control unit for dividing the tone tone analyzed by the tone tone analysis unit into a feedback tone and an input induced tone by analyzing time distribution and frequency distribution and outputting tone-related control signal information and maximum value on frequency; And the sound form according to the weighted consideration of the unnecessary range and the tone of the reflected sound using a predetermined weight for the center frequency output from the sound region position determining unit, the tone-related control signal information output from the tone control unit, and the maximum value information on the frequency. And a sound shape classification processing unit for outputting a control signal for removing the feedback sound by classifying.

In addition, in the automatic sound range control device of the acoustic device according to the present invention, the sound range position determination unit feedbacks the maximum value which differs from the maximum value and a predetermined decibel or more from the distribution of the plurality of maximum values according to the harmonics output from the response characteristic analyzer. It includes judging by the negative center frequency.

In addition, in the automatic sound range control apparatus of the acoustic device according to the present invention, the tone control unit maintains the frequency distribution without changing the time of the voice band according to the analysis information on the time distribution and the frequency distribution of the tone analyzed by the tone analyzer. In one state, if a specific portion between the bass portion and the mid-range is greater than or equal to the mid-range, it is classified as a feedback sound, and if it is small, it is classified into an input-induced sound and includes outputting tone-related control signal information and maximum information on frequency.

In addition, in the automatic sound range control apparatus of the acoustic apparatus according to the present invention, the sound form classification processing unit is provided with the center frequency output from the sound region position determination unit, the tone-related control signal information output from the tone control unit, and the maximum value information on the frequency. And calculating an interval and a phase of the sound range by calculating a proximity frequency of the center frequency of the feedback sound according to the included feedback sound, and outputting a control signal accordingly.

In addition, in the automatic sound range control apparatus of the acoustic apparatus according to the present invention, the periodic sound that is unnecessary in the space generated from the spatial characteristics from at least one signal output from the sound range controller is output from the feedback sound control unit and a predetermined response characteristic. And a space adjusting unit for adjusting and outputting according to a predetermined space designation; A signal synthesizer configured to select only a specific band according to each characteristic of at least one or more signals output from the spatial controller and then synthesize the selected signal and other band signals; An input characteristic / spatial section for outputting a predetermined input characteristic / spatial designation according to manual setting to the space adjusting section and the signal synthesizing section; A selection signal mixing processing unit which selects and mixes at least one or more signals output from the signal synthesizing unit according to a predetermined output condition output from the output conditioning unit and then mixes the mixed signals; And an output conditioner for outputting a predetermined output condition to the sorting signal mixing processor.

In addition, in the automatic sound range control apparatus of the acoustic device according to the present invention, the space control unit is a first switching unit for switching at least one or more signals output from the sound range control unit according to the space designation output from the input characteristic / space designation unit ; An induced input passband filter configured to filter the at least one signal output from the sound range controller according to switching of the first switching unit; A space period variable variable filter configured to variably filter a space period range of at least one signal output from the sound range controller according to switching of the first switching unit; And a low-variable filter unit configured to perform low-variable filtering on a signal output from the induced input passband filter unit or a signal output by variably filtering the bass-tone variable variable filter unit.

Further, in the automatic sound range control apparatus of the acoustic device according to the present invention, the low input variable filter unit is the induced input pass band filter unit when the induced input pass band filter unit is selected according to the space designation specified by the input characteristic / space designator. The low frequency band pass filtering is performed on the signal output from the low frequency band, or when the space period variable frequency filter is selected according to the space designation specified by the input characteristic / space designation. And outputting the variance filtering of the signal.

Further, in the automatic sound range control apparatus of the acoustic device according to the present invention, the signal synthesis processing unit is configured to switch the signal output from the space adjusting unit according to the manual setting according to the input characteristic output from the input characteristic / spatial section. 2 switching unit; A specific part filter part to filter a specific part of a signal output from the space controller according to the switching of the second switching part; A reverb that reverberates only a specific band signal of the signal output from the specific partial filter unit and outputs the rear end to the specific partial filter unit; A first bypass line bypassing a signal output from the space controller according to the switching of the second switch; A third switching unit for switching the signal output from the specific partial filter unit and the signal output from the reverb or the signal bypassed through the first bypass line according to the input characteristic output from the input characteristic / spatial section; A second bypass line bypassing a signal output from the first bypass line according to switching of the third switching unit; And an initial delay is imposed on the combined signal of the signal output from the specific partial filter unit and the signal output from the reverb according to the switching of the third switching unit to match the negative sound receiving point so as to reach a predetermined interval from the origin. It includes an initial delay unit for outputting.

In addition, in the automatic sound range control apparatus of the acoustic apparatus according to the present invention, the selection signal mixing processing unit presets values for the respective output channels according to a predetermined output condition output from the signal conditioner by the signal synthesis processing unit. A plurality of attenuation units each attenuating with a value; A plurality of fourth switching units for switching the signals output from the plurality of attenuation units in accordance with the signals output from the output conditioner; A plurality of bypass portions each bypassing signals output from the plurality of attenuation portions in accordance with switching of the plurality of fourth switching portions; A plurality of variable filters that variably filter each of the signals output from the plurality of attenuators in accordance with switching of the plurality of fourth switches; And a signal mixing unit for mixing and outputting signals through the plurality of bypass units or signals output from the plurality of variable filters.

Further, in the automatic sound range control apparatus of the acoustic device according to the present invention, the plurality of attenuation units respectively attenuate the signals output from the signal synthesis processing unit according to the attenuation reference value for each channel according to the signal output from the output condition unit. Include.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

Hereinafter, with reference to the accompanying drawings, the operation of the automatic sound range control apparatus of the sound apparatus according to the present invention will be described in detail.

1 is a view showing an embodiment of an automatic range control apparatus of an acoustic apparatus according to the present invention, wherein the automatic range control apparatus of the acoustic apparatus includes at least one microphone (not shown), an input matching unit 110, and a range of sound. The controller 120, the volume analyzer 130, and the feedback sound controller 140 are included.

2 illustrates a detailed configuration of the input matching unit of FIG. 1, wherein the input matching unit 110 includes a balance maintaining unit 111 and a limiter 112.

3 is a diagram illustrating a detailed configuration of the sound range controller of FIG. 1, and the sound range controller 120 includes at least one variable filter block 121.

4 is a diagram illustrating a detailed configuration of the feedback controller of FIG. 1, wherein the feedback sound controller 140 includes a response characteristic analyzer 141, a sound region position determiner 142, a tone analyzer 143, Tone control unit 144, and sound shape classification processing unit 145.

5 is a view showing another embodiment of an automatic sound range control apparatus for an acoustic device according to the present invention, which includes the components of FIGS. 1 to 6 described above, and a description thereof will be omitted.

Referring to FIG. 5, the automatic sound range control device of the acoustic device includes an input characteristic / space designator 210, an output conditioner 220, a space controller 230, and a signal synthesizer in the components of FIG. 240 and a selection signal mixing processing unit 250.

FIG. 6 is a diagram illustrating a detailed configuration of the space control unit of FIG. 5. Referring to FIG. 6, the space control unit 230 may include a first switching unit 231, an induced input passband filter unit 232, The spatial periodic sound variable variable filter 233 and the low sound variable variable filter 234 are included.

FIG. 7 is a diagram illustrating a detailed configuration of the signal synthesis processing unit of FIG. 5, wherein the signal synthesis processing unit 240 includes a second switching unit 241, a specific partial filter unit 242, a reverb 243, The first bypass line 244, the switching unit 245, the second bypass line 246, and the initial delay unit 247 are included.

FIG. 8 is a detailed configuration of the selection signal mixing processing unit of FIG. 5, wherein the selection signal mixing processing unit 250 includes a plurality of attenuation units 251, a plurality of fourth switching units 252, and a plurality of bypasses. A unit 253, a plurality of variable filters 254, and a signal mixing unit 255 are included.

When described in detail with reference to the accompanying drawings, the operation of the automatic sound range control apparatus of the sound apparatus according to the present invention configured as described above are as follows.

(First embodiment)

First, referring to FIG. 1, the input matching unit 110 maintains and balances the input signals X1 (n), X2 (n), ..., Xm (n) from at least one microphone (not shown). Input matching is performed to prevent response and the result signal is output.

Subsequently, the sound range controller 120 automatically corrects the phase and the sound range control portion of the audible frequency for each channel of the at least one result signal output from the input matching unit 110 in a range that does not affect the tone. Output the signal.

In this case, the volume analyzer 130 analyzes the volume of each of the one or more result signals output from the sound range controller 120 and outputs the result signal to the input matching unit 110.

In addition, the feedback sound controller 140 analyzes a sound range and a tone of each of at least one result signal Sc1 (n), Sc2 (n), ..., Scm (n) output from the sound range controller 120. The feedback sound is controlled and output to the sound range controller 120. That is, as shown in FIG. 4, the response characteristic analyzer 141 of the feedback sound controller 140 spectrums at least one or more result signals output from the sound region controller 120 on an audible frequency according to harmonics. Multiple maximum values are analyzed and the resulting signal is output. That is, the response characteristic analysis unit 141 of the feedback sound control unit 140 spectra at least one or more result signals output from the sound region control unit 120 on an audible frequency, and then, in the feedback sound region to obtain one maximum peak value. It analyzes the maximum number of possible harmonics and outputs the signal. When the limit range of the harmonic is less than a predetermined number (for example, four), the maximum peak value may be caused by the maximum peak value. To detect signal errors with lesser values. Subsequently, the sound region position determination unit 142 of the feedback sound control unit 140 determines the distribution of the plurality of maximum values according to the harmonics output from the response characteristic analyzer 141 and the audible frequency position within the analysis threshold point. The center frequency is determined based on the maximum value, and the resultant signal is output. That is, the sound region position determination unit 142 of the feedback sound control unit 140 analyzes the distribution of a plurality of maximum values according to the harmonics output from the response characteristic analyzer 141 and the audible frequency position and the double maximum value within the analysis threshold point. If the maximum peak value is different from the predetermined decibel (for example, 6 Hz) or more, the maximum peak value is determined as the center frequency of the feedback sound, and the resultant signal is output. In addition, the tone analysis unit 143 of the feedback sound control unit 140 is a harmonic portion that varies with time distribution based on the time and frequency distribution of the audible frequency of the at least one result signal output from the sound range control unit 120 and The tone is analyzed by the information of the harmonic part which does not change, and the result signal is output. Subsequently, the tone control unit 144 of the feedback sound control unit 140 classifies the feedback sound and the input induced sound according to the time distribution and the frequency distribution of the tone analyzed by the tone analyzer 143 to control the tone-related control signal information. Output maximum information on and frequency. That is, the tone control unit 144 of the feedback sound control unit 140 according to the analysis information on the time distribution and the frequency distribution of the tone analyzed by the tone analyzer 143 does not change the frequency distribution in the voice band time. If the specific portion between the bass and the mid-range of the voice band is greater than or equal to the mid-range, it is classified as a feedback sound, and if it is small, it is classified as an input-induced sound to output the tone-related control signal information and the maximum information on the frequency. Accordingly, the sound form classification processing unit 145 of the feedback sound control unit 140 has the center frequency output from the sound region position determining unit 142 and the tone-related control signal information output from the tone control unit 144 and the frequency. Using the predetermined weight for the maximum value information, the sound form is classified according to the unnecessary range of the reflected sound and the weighted consideration value of the tone to output a control signal for removing the feedback sound.

Then, the input matching unit 110 performs an input matching to prevent the balance maintenance and over-response of at least one or more input signals from at least one microphone according to the volume analysis signal output from the volume analysis unit 130 As a result, signals X1 '(n), X2' (n), ..., Xm '(n) are output. That is, as shown in FIG. 2, the balance maintaining unit 111 of the input matching unit 110 adjusts the balance of the at least one input signal according to the volume analysis signal output from the volume analyzer 130. Keep it and print it out. Here, the balance maintaining unit 111 of the input matching unit 110 is a predetermined balance maintenance value (A) corresponding to the input signal in order to adjust the microphone-specific characteristics of the at least one or more input signals input from the at least one or more microphones. , B, ...) are calculated and the resulting signal is output. Subsequently, the limiter 112 of the input matching unit 110 may provide an overresponse to a plurality of input signals balanced by the balance maintaining unit 111 according to the volume analysis signal output from the volume analysis unit 130. Prevent and print. That is, the limiter 112 of the input matching unit 110 limits the value of the decibel (for example, 0 dB) or less to at least one or more balanced signals output from the balance maintaining unit 111. Remove the response and output the result signal.

Subsequently, the sound range controller 120 outputs the phase and sound range control portion of the audible frequency for each channel of at least one resultant signal output from the limiter 112 of the input matching unit 110 in the feedback sound controller 140. The feedback sound is automatically corrected within a range that does not affect the timbre according to the controlled signal and then outputs the result signals Sc1 (n), Sc2 (n), ..., Scm (n). That is, as shown in Figure 3, at least one or more (1, 2, ..., m) of the variable range control unit 120 of the variable filter block 121 is at least one input output from the input matching unit 110 The phase and sound range control portion of the audible frequency for each channel of the signals are automatically corrected in a range that does not affect the timbre according to the feedback sound controlled signal output from the feedback sound control unit 140, and outputs the resultant signal.

Subsequently, the feedback sound received from the at least one microphone is controlled according to the signal fed back from the volume controller 130 and the feedback sound controller 140 through the input matching unit 110 and the sound region controller 120. By repeating the output process, a clear tone can be output through the sound range control.

(2nd Example)

First, Figure 5 is a view showing another embodiment of the automatic sound range control device of the acoustic device according to the present invention, including the above-described components of Figs. 1 to 4, the description thereof will be omitted do.

First, referring to FIG. 5, the input characteristic / space designator 210 outputs a predetermined input characteristic / spatial designation set manually by a user. If the center A speaker (not shown) is 3m, the front B speaker (not shown) is 3m, the rear C speaker (not shown) is 6m, and the rear D speaker (not shown) is 7m, the voice speed is about 334m / s. , 1m delays 3ms, with 0 delay (bypass) relative to the farthest speaker, front A speaker is 12ms, front B speaker is 6ms, rear C speaker is 3ms, rear D speaker is 0ms Each can be specified with

In addition, the output conditioner 220 outputs a predetermined output condition to a predetermined channel according to a plurality of channels of the input signal from at least one or more micros input to the input matching unit 110 of FIG. 1, for example, 4. Output conditions are output from the channel inputs to one channel output or from the two channel inputs to one channel output.

Then, the space adjusting unit 230 from the at least one result signal Sc1 (n), Sc2 (n), ..., Scm (n) output from the sound range controller 120 of the first embodiment described above. The period sound unnecessary for the space generated by the spatial characteristics of the control unit is adjusted according to the signal output from the feedback sound control unit 140 and the predetermined response characteristic and the predetermined spatial designation output from the input characteristic / spatial designator 210, and then the The result signals Sc1 '(n), Sc2' (n), ..., Scm '(n) are output. That is, as shown in FIG. 6, the first switching unit 231 of the space adjusting unit 230 is output from the sound range controller 120 according to the space designation output from the input characteristic / space designation unit 210. The at least one signal. Subsequently, the induced input passband filter unit 232 of the spatial controller 230 filters the at least one signal output from the sound region controller according to the switching of the first switching unit 231 to output the induced input passband filter. . In addition, the space period variable domain filter 233 of the space controller 230 controls the space period sound range of at least one signal output from the sound range controller 120 according to the switching of the first switching unit 231. Variable filtering Then, the low variable variable filter unit 234 of the spatial control unit 230 is a signal output from the induced input pass band filter unit 232 or a signal output by variable bass variable filtering from the spatial period negative domain variable filter unit 233 Output by filtering the bass variable. That is, the bass variable filter 234 of the spatial controller 230 is the induced input when the induced input passband filter unit 223 is selected according to the spatial designation specified by the input characteristic / space designator 210. When the signal output from the passband filter unit 223 is filtered through the mid-bass band or is output, or the space-period variable variable filter unit 233 is selected according to the spatial designation specified by the input characteristic / spatial correction unit 210. The spatial periodic gamut variable filtering unit 233 performs variable bass filtering on the output signal and performs variable bass filtering on the output signal. Subsequently, the signal synthesizing unit 240 performs the space according to the result signals Sc1 '(n), Sc2' (n), ..., Scm '(n) outputted from the input characteristic / space designator 210. At least one or more signals output from the controller 230 are selected according to their characteristics, and then the selected signals and other band signals are synthesized, and the resultant signals Ss1 (n) and Ss2 (n). , ..., Ssm (n)). That is, as shown in FIG. 7, the second switching unit 241 of the signal synthesizing unit 240 controls the space adjusting unit according to the manual setting according to the input characteristic output from the input characteristic / space designation 210. The signal output at 230 is switched. Subsequently, the specific part filter unit 242 of the signal synthesis processor 240 filters and outputs a specific part of the signal output from the space controller 230 according to the switching of the second switching unit 241. Then, the reverb 243 of the signal synthesis processing unit 240 reverberates only the specific band signal of the signal output from the specific partial filter unit 242 and outputs the rear end to the specific partial filter unit 242. In addition, the first bypass line 244 of the signal synthesis processor 240 bypasses the signal output from the space controller 230 according to the switching of the second switch 241. Subsequently, the third switching unit 245 of the signal synthesis processing unit 240 may output the signal output from the specific partial filter unit 242 and the reverb according to the input characteristic output from the input characteristic / spatial section 210. The signal output from 243 or the signal bypassed through the first bypass line 244 is switched. Then, the second bypass line 246 of the signal synthesis processor 240 bypasses the signal output from the first bypass line 244 according to the switching of the third switching unit 245. In addition, the initial delay unit 247 of the signal synthesis processing unit 240 is a signal output from the specific filter portion 242 and the signal output from the reverb 243 in accordance with the switching of the third switching unit 245. An initial delay is applied to the synthesized signal of and the negative sound receiving point is matched and outputted so as to reach a predetermined interval from the origin. That is, the initial delay unit 245 of the signal synthesis processing unit 240 is the specific partial filter unit 242 according to the switching of the third switching unit 244 according to the designated value output from the space detector 230. In the initial delay (for example, when four speakers are designated in the spatial indicator 230), the front A speaker 12ms, the front B speaker 6ms, A rear C speaker 3ms and a rear D 0ms) are charged to match the negative sound picking point so as to reach a fixed interval from the origin.

Subsequently, the selection signal mixing processing unit 250 outputs the at least one result signal Ss1 (n), Ss2 (n), ..., Ssm (n) output from the signal synthesizing unit 220. After mixing according to a predetermined output condition output from the control unit, the resultant signals Sout1 (n), Sout2 (n), ..., Soutm (n) are output. That is, as illustrated in FIG. 8, the plurality of attenuators 251 of the selective signal mixing processor 250 attenuate the signals output from the signal synthesis processor 240 to predetermined values for respective channels. As a result, a signal is output. That is, the plurality of attenuators 251 of the selective signal mixing processor 25 attenuate by 1/4 if the output condition output from the output conditioner 220 is a 4-channel input or a 1-channel output as in the above example. Reference values are given for each channel, and reference values for attenuating by 1/2 are given for two-channel input and one-channel output, respectively. Subsequently, the plurality of fourth switching units 252 of the selection signal mixing processing unit 250 switches the signals output from the plurality of attenuation units 241 according to the signals output from the output conditioner 220. Then, the plurality of bypass units 253 of the selection signal mixing processing unit 250 bypass the signals output from the plurality of attenuation units 251 according to the switching of the plurality of fourth switching units 252, respectively. . In addition, the plurality of variable filters 254 of the selective signal mixing processor 250 variably filter each of the signals output from the plurality of attenuators 251 according to the switching of the plurality of fourth switches 252. . Accordingly, the signal mixing unit 255 of the selective signal mixing processing unit 250 mixes the signals outputted from the plurality of bypass units 243 or the signals output from the plurality of variable filters 254 and then results. The signals Sout1 (n), Sout2 (n), ..., Soutm (n) are output.

As described above, the automatic sound range control device of the acoustic device according to the present invention reflects the spatial characteristics of the input sound / spatial designation to the signals controlled by the feedback sound, thereby allowing the space and the reflection sound according to a specific space, for example, a classroom, karaoke, or the like. By controlling the, a more clear tone is output.

As described above, the automatic sound range control apparatus of the acoustic device according to the present invention has the following effects.

First, the automatic sound range control apparatus of the acoustic device according to the present invention has an effect of outputting a clear tone by controlling a feedback sound including a howling from at least one micro-input signal.

Second, the automatic sound range control device of the acoustic device according to the present invention automatically controls only the unnecessary sound due to the space and the reflection sound changed according to the environment between the input signal and the output signal without affecting the tone of the input signal. By distinguishing input-induced sounds, it is possible to easily and conveniently tune auto-corrected sound range control in a variety of environments in the field where temporal matching of each signal according to space and synthesis of a selection signal at output are desired.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims and their equivalents.

Claims (16)

An input matching unit configured to perform input matching for maintaining balance and preventing overresponse for each of the input signals input from at least one microphone; A sound range control unit for automatically correcting and outputting an audible frequency phase and sound range control portion for each signal output from the input matching unit in a range that does not affect a tone; A volume analyzer for analyzing a volume of each signal output from the sound range controller to output the matching to the input matching unit so that matching is performed on each input signal in the input matching unit; And And a feedback sound control unit for analyzing a sound range and a tone of each signal output from the sound field controller so as to perform automatic correction by the sound range controller, and controlling the feedback sound to output the sound to the sound range controller. Sound range control. The method of claim 1, The input matching unit A balance maintaining unit maintaining a balance for each input signal according to the volume analysis signal output from the volume analysis unit; And And a limiter for preventing an overresponse to each signal maintained in balance in the balance maintaining unit. The method of claim 2, And the balance maintaining unit calculates a predetermined balance holding value corresponding to each input signal in order to adjust characteristics of each microphone for each input signal. The method of claim 2, And the limiter removes overresponse by limiting each signal output from the balance maintaining unit to a value of a predetermined decibel or less. The method of claim 1, The sound range controller automatically corrects and outputs an audible frequency phase and sound range control portion for each signal output from the input matching unit according to a feedback sound controlled signal output from the feedback sound control unit within a range that does not affect the tone. Automatic sound range control device for a sound device comprising a variable filter block. The method of claim 5, The variable filter block may be used as one of a high pass filter, a low pass filter, a band pass filter, a band cut filter, and a band transform filter according to a feedback sound controlled signal output from the feedback sound control unit. Automatic range control. The method of claim 1, The feedback sound control unit A response characteristic analyzer configured to spectrum each signal output from the sound range controller on an audible frequency and analyze a plurality of maximum values according to harmonics; A sound range position determining unit for determining a center frequency based on an audible frequency position and a double maximum value within an analysis threshold point of the distribution of the plurality of maximum values according to the harmonics output from the response characteristic analyzer; A tone analyzer for analyzing a tone with information of a harmonic portion and a harmonic portion that do not change based on time and frequency distribution of an audible frequency of each signal output from the sound range controller; A tone control unit for dividing the tone tone analyzed by the tone tone analysis unit into a feedback tone and an input induced tone by analyzing time distribution and frequency distribution and outputting tone-related control signal information and maximum value on frequency; And The sound form according to the weighted consideration of the unnecessary range and the tone of the reflected sound using a predetermined weight for the center frequency output from the sound region position determining unit, the tone-related control signal information output from the tone control unit, and the maximum value information on the frequency. And a sound shape classification processing unit for outputting a control signal for removing the feedback sound by classifying the sound processing apparatus. The method of claim 7, wherein The sound region position determining unit determines the maximum value that differs from the maximum value and a predetermined decibel value from the distribution of the plurality of maximum values according to the harmonics output from the response characteristic analyzer as the center frequency of the feedback sound. Automatic range control. The method of claim 7, wherein The tone control unit according to the analysis information on the time distribution and frequency distribution of the tone analyzed by the tone analysis unit in the state of maintaining the frequency distribution without changing the time of the voice band, the specific portion between the bass and mid-tone of the voice band If it is greater than or equal to the feedback sound, if it is small, the automatic sound control device of the sound device, characterized in that to process the tone-related control signal information and the maximum value information on the frequency by processing. The method of claim 7, wherein The sound form classification processing unit The interval between sound regions is calculated by calculating a near frequency of the center frequency of the feedback sound according to the feedback frequency included in the center frequency output from the sound region position determining unit, the tone-related control signal information output from the tone control unit, and the maximum value information on the frequency. And an automatic phase control device for the sound device, characterized in that for determining a phase and outputting a control signal accordingly. The method of claim 1, Input characteristics and spatial designation for outputting spatial designations according to manual settings; An output conditioner for outputting a predetermined output condition; A space adjusting unit for outputting a periodic sound unnecessary for the space generated from the spatial characteristics from each signal output from the sound range controller according to the signal output from the feedback sound controller and the input characteristics and the space designation of the spatial designator; A signal synthesizer configured to select only a specific band according to each characteristic of each signal output from the spatial controller and then synthesize the selected signal and other band signals; And And a sorting signal mixing processing unit for sorting and outputting each signal output from the signal synthesizing unit according to a predetermined output condition output from the output conditioning unit and then mixing the signals. The method of claim 11, The space control unit A first switching unit for switching a signal output from the sound range controller according to the input characteristic and the space designation output from the space designation unit; An induced input passband filter unit configured to cause an input passband filtering of a signal output from the sound range controller according to switching of the first switching unit; A space period variable variable filter for filtering the space period range of a signal output from the sound range controller according to the switching of the first switching unit; And And a low-variable filter unit configured to perform low-variable filtering on a signal output from the induced input passband filter unit or a signal output by variably filtering the bass-tone variable variable filter unit. The method of claim 12, The bass variable filter unit outputs the low frequency band pass filtering the signal output from the trigger input pass band filter unit when the trigger input pass band filter unit is selected according to the input characteristic and the spatial designation specified by the spatial designator, or inputs the signal. When the spatial periodic sound domain variable filter unit is selected according to the characteristics and the spatial designation specified by the spatial designation, the spatial periodic acoustic variable filter unit performs variable bass variable filtering to output a low bass variable filtering signal. Automatic range control. The method of claim 11, The input characteristic and space designation output an input characteristic according to a manual setting, The signal synthesis unit A second switching unit for switching the signal output from the space adjusting unit according to a manual setting according to the input characteristic and the input characteristic output from the space designation unit; A specific part filter part to filter a specific part of a signal output from the space controller according to the switching of the second switching part; A reverb that reverberates only a specific band signal of the signal output from the specific partial filter unit and outputs the rear end to the specific partial filter unit; A first bypass line bypassing a signal output from the space controller according to the switching of the second switch; A third switching unit for switching a signal output from the specific partial filter unit and a signal output from the reverb or a signal bypassed through the first bypass line according to the input characteristic and the input characteristic output from the spatial designator; And A second bypass line bypassing a signal output from the first bypass line according to switching of the third switching unit; In response to the switching of the third switching unit, an initial delay is imposed on the combined signal of the signal output from the specific partial filter unit and the signal output from the reverb to match the negative sound receiving point so that the arrival time of a certain interval from the origin is output. Automatic sound range control device for an acoustic device comprising an initial delay unit. The method of claim 11, The selection signal mixing processing unit A plurality of attenuation units that attenuate each signal output from the signal synthesizing unit to a predetermined value for each channel according to a predetermined output condition output from the output conditioner; A plurality of fourth switching units for switching the signals output from the plurality of attenuating units in accordance with the signals output from the output conditioner; A plurality of bypass portions each bypassing signals output from the plurality of attenuation portions in accordance with switching of the plurality of fourth switching portions; A plurality of variable filters configured to variably filter each of signals output from the plurality of attenuators in accordance with switching of the plurality of fourth switches; And And a signal mixing unit for mixing and outputting signals through the plurality of bypass units or signals output from the plurality of variable filters. The method of claim 15, And the plurality of attenuation units attenuate each signal output from the signal synthesizing unit according to the attenuation reference value for each channel according to the signal output from the output conditioner.

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