CN115278499A - Time delay measuring method and device, electronic equipment and storage medium - Google Patents

Abstract

The invention provides a time delay measuring method and a time delay measuring device for an acoustic amplification system, electronic equipment and a storage medium, wherein the time delay measuring method comprises the following steps: playing a preset first audio signal for the first time by using a loudspeaker, picking up a second audio signal by using a sound pick-up and processing the second audio signal into a third audio signal by using a voice algorithm; obtaining an adjustment parameter of the sound amplifying system according to the signal processing of the second audio signal and the third audio signal; playing the first audio signal for the second time by using a loudspeaker, and adjusting the obtained third audio signal in real time by using the adjustment parameter; and obtaining the sound amplification delay of the sound amplification system according to the self-oscillation information of the third audio signal. Therefore, the accuracy and operability of time delay measurement of the sound amplification system can be improved, errors caused by manual intervention are avoided, the cost is saved, and the debugging efficiency is improved.

Description

Delay measurement method and device, electronic equipment and storage medium

technical field

The invention relates to the technical field of audio processing, in particular to a delay measurement method and device for a sound reinforcement system, electronic equipment and a storage medium.

Background technique

Whether in the field of professional audio or consumer audio, more and more digital audio processors play an increasingly important role in the improvement of the playback sound quality of the audio system and the presentation of various hearing effects. The traditional method of improving the playback sound quality by improving the material, structure and process of the audio equipment itself is restricted by many objective factors. With the wide application of digital signal processing technology in the audio field and the advantages of DSP development costs, through It has become an inevitable trend to use signal processing methods to compensate and regulate the sound quality of the audio system.

In the audio system, especially the sound reinforcement system, the delay requirement is extremely high. The lower the sound reinforcement delay, the more comfortable the human ear feels. Therefore, in the product, low delay in the audio system has always been one of the main indicators, so Reducing latency in the system is a goal. With the development of the times, the expansion of classrooms and halls, the increase in the number of audience, and the advancement of electronic technology, it is inevitable to use a sound reinforcement system similar to that shown in Figure 1 in classrooms and halls. The scene of the sound reinforcement system includes tuning The sound source part (such as: wired microphone, wireless microphone, video conferencing equipment, computer, etc.), signal processing and signal amplification part (such as equalizer, power amplifier, processor, etc.) Acoustic parts (such as speakers).

The sound reinforcement system is usually a system that amplifies the speaker's voice to the listener in real time. In this scene, the pickup and the speaker are in the same sound field, and the speaker and the listener are usually in the same acoustic environment. A successful sound reinforcement system must be loud enough (sufficient acoustic gain) and intelligible (low percentage loss of intelligibility of speech consonants) to cover the audience evenly without covering areas where there are no listeners . Since the speaker and listener are usually in the same acoustic environment, the listener will hear both the speaker's voice and the speaker's voice broadcast in real time from the speaker. If the time between the two sounds is relatively long, the listener will hear the two sounds mixed together, resulting in inaudible hearing.

The Haas effect proves that when two sound sources emit the exact same sound, the perception of binaural listening is different according to the amount of delay between one sound source and the other. When the delay between one sound source and another sound source is less than 35ms, the human ear can only perceive the existence of the preceding sound source, the sound image localization is biased towards the position of the preceding sound source, and the lagging sound source cannot be felt When the delay is between 30ms and 50ms, the human ear can distinguish the existence of two sound sources, but the sound image is still positioned in the direction of the advanced sound source; when the delay is greater than 50ms, the human ear can perceive the existence of two sound sources. The sound sources exist at the same time, and the sound images are respectively positioned at the positions of the two sound sources themselves.

Therefore, in local sound reinforcement, the delay between the speaker's voice and the speaker's voice played by the speaker in real time must be strictly controlled. To ensure the installation effect, it can only be used after complex debugging by professional sound engineers after installation, which will consume a lot of time and energy, and it is difficult to maintain consistency after debugging due to different people's hearing.

Existing methods for local sound reinforcement delay estimation are not very accurate. And generally need manual processing, time-consuming and laborious. Hiring a professional agency is time consuming and costly.

Contents of the invention

In order to solve the above technical problems, the present invention provides a delay measurement method and device, electronic equipment and storage medium for the sound reinforcement system, which can improve the accuracy and operability of the delay measurement of the sound reinforcement system and avoid manual intervention The errors brought about save costs and improve debugging efficiency.

On the one hand, the present invention provides a delay measurement method for a sound reinforcement system, which includes:

Using the speaker to play the preset first audio signal for the first time, and using the pickup to pick up the second audio signal and processing the second audio signal into a third audio signal through a speech algorithm;

obtaining adjustment parameters of the sound reinforcement system according to signal processing of the second audio signal and the third audio signal;

using the speaker to play the first audio signal for the second time, and adjusting the obtained third audio signal in real time using the adjustment parameters;

The sound reinforcement delay of the sound reinforcement system is obtained according to the self-oscillation information of the third audio signal.

Optionally, obtaining the adjustment parameters of the sound reinforcement system according to the signal processing of the second audio signal and the third audio signal includes:

performing speech algorithm processing on the aforementioned second audio signal to obtain a first intermediate signal;

adjusting the gain and/or amplitude of the second audio signal to the first intermediate signal to obtain the aforementioned adjustment parameters,

The aforementioned first intermediate signal satisfies the self-oscillating condition of the sound reinforcement system, so as to generate a self-oscillating third audio signal.

Optionally, obtaining the sound reinforcement delay of the sound reinforcement system according to the self-oscillation information of the third audio signal includes:

Performing real-time speech algorithm processing on the third audio signal by using the aforementioned adjustment parameters to obtain a second intermediate signal, the second intermediate signal comprising a plurality of signal segments;

The sound reinforcement delay of the sound reinforcement system is determined according to the second intermediate signal.

Optionally, the aforementioned speech algorithm processing includes adding a fixed delay to the obtained audio signal.

Optionally, determining the sound reinforcement delay of the sound reinforcement system according to the second intermediate signal includes:

obtaining a plurality of signal segments in the aforementioned second intermediate signal;

Calculate the real delay between adjacent signal segments;

The system delay is obtained by subtracting the fixed delay from the real delay; and

The sound reinforcement delay of the sound reinforcement system is obtained according to the statistical data of the system delay between a plurality of adjacent signal segments.

Optionally, obtaining the sound reinforcement delay of the sound reinforcement system according to statistical data of system delays between multiple adjacent signal segments includes:

The sound reinforcement delay of the sound reinforcement system is taken as the statistical mode of the system delay between multiple adjacent signal segments.

Optionally, calculating the real delay between adjacent signal segments includes:

Detect whether the real delay between multiple signal segments meets a preset threshold:

If not satisfied, stop the operation of the sound reinforcement system;

If it is satisfied, continue to execute the operation of the delay measurement method.

On the other hand, the present invention also provides a delay measuring device for a sound reinforcement system, which includes:

An acquisition module, the acquisition module is respectively connected to the loudspeaker and the pickup in the sound reinforcement system, and plays the preset first audio signal through the loudspeaker, and picks up the second audio signal by the pickup;

A processing module, configured to process the second audio signal into a third audio signal through a speech algorithm;

The gain control module is used to obtain the adjustment parameters of the sound reinforcement system according to the signal processing of the second audio signal and the third audio signal, and use the adjustment parameters to adjust the obtained third audio signal in real time;

A calculation module, the calculation module is used for detecting and calculating the self-excited oscillation information of the third audio signal, so as to obtain the sound reinforcement delay of the sound reinforcement system.

Optionally, the aforementioned delay measurement device also includes:

Input module, used to set the fixed delay of the input,

Moreover, the aforementioned processing modules are also used to execute:

performing speech algorithm processing on the second audio signal to obtain the first intermediate signal; and

The third audio signal is processed by the speech algorithm using the adjustment parameters to obtain the second intermediate signal, wherein the first intermediate signal can meet the self-excited oscillation condition of the sound reinforcement system to generate a self-oscillated third audio signal, and the second intermediate A signal consists of a number of signal fragments.

Optionally, the aforementioned calculation module is used to perform detection and calculation according to the self-excited oscillation information of the third audio signal to obtain the sound reinforcement delay of the sound reinforcement system:

obtaining a plurality of signal segments in the aforementioned second intermediate signal;

Calculate the real delay between adjacent signal segments;

Subtract the fixed delay from the real delay to obtain its system delay; and

The sound reinforcement delay of the sound reinforcement system is obtained according to the statistical data of the system delay between a plurality of adjacent signal segments.

On the other hand, the present invention also provides an electronic device, including a memory and a processor, the memory is used to store a computer program, and the processor runs the computer program to make the electronic device perform the delay for the sound reinforcement system as described above Measurement methods.

On the other hand, the present invention also provides a readable storage medium, the readable storage medium stores computer program instructions, and when the computer program instructions are read and executed by a processor, the aforementioned method for Delay measurement methods for sound reinforcement systems.

The beneficial effect of the present invention is: a delay measurement method and device, electronic equipment and storage medium for sound reinforcement system provided by the present invention can realize:

1. The system’s PA delay can be automatically tested without manual intervention, which is highly intelligent and automated, efficient and fast;

2. The delay measurement method and device for the sound reinforcement system uses the sound reinforcement system to play the same sequence twice, and optimizes and adjusts the algorithm so that the sound reinforcement system meets the self-excited oscillation conditions to generate a self-excited oscillation signal, and effectively use, to avoid interference;

3. Based on the self-excited oscillation signal generated by the sound reinforcement system, the system delay between adjacent speech segments is calculated, and the statistical mode is selected as the system's application sound reinforcement delay among multiple system delays, which improves the algorithm The reliability makes the calculation and measurement of the sound reinforcement delay more accurate;

4. The algorithm is used to modify the amplitude of the echo signal, which will not change the input volume of the microphone or the volume of the speaker, so there is no modification to the parameters of the sound reinforcement system, and the operation is convenient.

It should be appreciated that methods according to this document may comprise any combination of the aspects and features described herein. That is, the methods according to this document are not limited to combinations of aspects and features specifically described herein, but also include any combination of aspects and features provided.

The details of one or more embodiments herein are set forth in the accompanying drawings and the description below. Other features and advantages herein will appear from the text and drawings, and from the claims.

Description of drawings

The above and other objects, features and advantages of the present invention will be more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings.

Fig. 1 shows a structural schematic diagram of a sound reinforcement system in the prior art;

FIG. 2 shows a schematic flowchart of a delay measurement method for a sound reinforcement system provided by an embodiment of the present disclosure;

Fig. 3 shows a model application diagram of the delay measurement method shown in Fig. 2 in an embodiment;

Fig. 4 shows the model sketch map that application delay measurement method shown in Fig. 2 obtains sound reinforcement delay;

Figure 5a shows a schematic diagram of the waveform of the first audio signal Sa provided in the delay measurement method shown in Figure 2;

Fig. 5b shows a schematic diagram of the waveform of the third audio signal Sc provided in the delay measurement method shown in Fig. 2;

Fig. 6 shows a schematic diagram of an application model of a delay measurement device for a sound reinforcement system provided by an embodiment of the present disclosure.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be implemented in different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the content of the present invention more thorough and comprehensive.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used in the description of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Fig. 2 shows a schematic diagram of a process model of a delay measurement method for a sound reinforcement system provided by an embodiment of the present disclosure, and Fig. 3 shows a model application diagram of the delay measurement method shown in Fig. 2 in an implementation manner, FIG. 4 shows a schematic diagram of a model of sound reinforcement delay obtained by applying the delay measurement method shown in FIG. 2 .

Referring to FIG. 2 , an embodiment of the present disclosure provides a delay measurement method for a sound reinforcement system. The hardware operating environment involved in the solution of this embodiment can be, for example, an electronic terminal with audio data collection, transmission and processing functions such as a portable computer equipment. In this embodiment, the delay measurement method includes:

Step S10: Use the speaker to play the preset first audio signal for the first time, and use the pickup to pick up the second audio signal and process the second audio signal into a third audio signal through a speech algorithm.

Step S20: Obtain the adjustment parameters of the sound reinforcement system according to the signal processing of the second audio signal and the third audio signal.

Step S30: using the speaker to play the first audio signal for the second time, and using the adjustment parameters to adjust the obtained third audio signal in real time.

Step S40: Obtain the sound reinforcement delay of the sound reinforcement system according to the self-oscillation information of the third audio signal.

In some embodiments, in the aforementioned step S10, the sound reinforcement system is run for the first time, the first audio signal Sa is played, and the second audio signal Sb collected by the pickup (generally a microphone, the same below) is obtained and the voice algorithm outputs the third audio signal Sa. Audio signal Sc.

In this step, the preset first audio signal Sa is played in the sound reinforcement system, and the voice picked up by the microphone is saved as the second audio signal Sb. The first audio signal Sa is directly sent to the speaker, assuming that the duration of the first audio signal Sa is Tsa. Then the duration of running the local sound reinforcement system for the first time is about Ta+480ms. Then, the second audio signal Sb is processed into a third audio signal Sc through a speech algorithm, which is stored and output.

In particular, the preset first audio signal Sa is a signal with a sharp waveform in the first half and silence in the second half. It can be a short signal as shown in Figure 5a, or other short signals such as pulse signals.

In some embodiments, in the aforementioned step S20, obtaining the adjustment parameters of the sound reinforcement system according to the signal processing of the second audio signal and the third audio signal may specifically include:

Perform speech algorithm processing on the aforementioned second audio signal Sb to obtain a first intermediate signal (not shown);

performing gain and/or amplitude adjustment on the second audio signal Sb to the aforementioned first intermediate signal, so as to obtain the aforementioned adjustment parameters,

Wherein, the aforementioned first intermediate signal satisfies the self-oscillating condition of the sound reinforcement system, so as to generate the self-oscillating third audio signal Sc.

It can be seen that self-excited oscillation refers to a constant and continuous oscillation generated by itself without an external excitation signal. In this embodiment, the third audio signal Sc of self-excited oscillation generated by the sound reinforcement system is the same segment of speech with a certain frequency. In the audio signal formed by frequency loop superposition, there will be slight errors in the duration between adjacent speech segments in the time domain.

In some embodiments, in the aforementioned step S40, obtaining the sound reinforcement delay of the sound reinforcement system according to the self-oscillation information of the third audio signal may include:

When running the sound reinforcement system for the second time, the first audio signal Sa is played, and the third audio signal Sc is processed by a real-time speech algorithm using the aforementioned adjustment parameters to obtain a second intermediate signal (not shown), the second The intermediate signal is the self-excited oscillation signal formed by the sound loop, including multiple signal segments; and then the sound reinforcement delay of the sound reinforcement system is determined according to the second intermediate signal.

In this embodiment, the aforementioned speech algorithm processing includes adding a fixed delay to the obtained audio signal.

In the real local sound reinforcement system, the delay between the voice A of the person speaking and the sound reinforcement B of the speaker is very short, and the two signals are partially overlapped on the time axis. Speech processing is performed after adding a fixed delay, so that the sound A of the person speaking is separated from the sound reinforcement B that comes out of the speaker after a delay, so that the two signals of A and B may be completely different on the time axis Coincident, thus "separated" out to facilitate the processing of B.

The purpose of setting a fixed delay is to effectively separate the voice signal after each sound reinforcement. Therefore, the delay processing step can be changed, it can be after the second audio signal Sb is obtained, or after the third audio signal Sc is obtained, which is not limited here.

In some embodiments, in the aforementioned step S40, obtaining the sound reinforcement delay of the sound reinforcement system according to the second intermediate signal further includes:

obtaining a plurality of signal segments in the aforementioned second intermediate signal;

Calculate the real delay t0 between adjacent signal segments (as shown in Figure 5b and the table in the following embodiments);

The real delay is subtracted from the fixed delay to obtain its corresponding system delay t1 (shown in the table in the following embodiments); and

The sound reinforcement delay of the sound reinforcement system is obtained according to the statistical data of the system delay t1 between multiple adjacent signal segments.

In a further embodiment, obtaining the sound reinforcement delay of the sound reinforcement system according to the statistical data of the system delay between multiple adjacent signal segments includes:

The sound reinforcement delay of the sound reinforcement system is taken as the statistical mode of the system delay between multiple adjacent signal segments.

The delay measurement method used in the sound reinforcement system in this embodiment can automatically test and obtain the sound reinforcement delay of the system without manual intervention, which is highly intelligent and automatic, efficient and fast.

In this embodiment, the sound reinforcement system is used to play the same sequence twice, and an algorithm is used to make the sound reinforcement system generate a self-excited oscillation signal, which is effectively used to avoid interference, and is calculated based on the self-excited oscillation signal generated by the sound reinforcement system Delay, select the result that appears the most among multiple results, which improves the reliability of the algorithm and makes the calculation of the sound reinforcement delay more accurate.

In the above implementation process, the algorithm is used to modify the amplitude of the echo signal without changing the input volume of the microphone or the volume of the speaker, so there is no modification to the parameters of the sound reinforcement system, and the operation is convenient.

With reference to the model of the delay measurement method provided by the embodiment of the present disclosure shown in FIG. 3 in an implementation manner, it can be understood in conjunction with the foregoing embodiments. The process model can include:

Step 1: Set a fixed delay for input voice.

In this step, the fixed delay time can be used to separate the voice signal after each sound reinforcement, and can be set through the sound delay device, so that the voice signal collected by the pickup can be processed by an algorithm after a fixed delay time. In this embodiment, the fixed input delay is set to be, for example, 480 milliseconds, and it is expected that the speech signal after each sound reinforcement can be effectively separated.

Step 2: Run the sound reinforcement system for the first time, play the first audio signal Sa, obtain the second audio signal Sb collected by the microphone and the third audio signal Sc output by the speech algorithm.

Step 3: Process the second audio signal Sb to obtain a strategy for modifying and adjusting the second audio signal Sb.

In this step, after the sound reinforcement system stops running for the first time, use the gain control module to calculate the method strategy for modifying and adjusting the second audio signal Sb through an optimization algorithm, specifically, for example, including: Sb performs speech algorithm processing to obtain a first intermediate signal (not shown); the second audio signal Sb performs gain and/or amplitude adjustment to the aforementioned first intermediate signal to obtain the aforementioned adjustment parameters, wherein the first audio signal Sb An intermediate signal can satisfy the self-oscillating condition of the sound reinforcement system to generate a self-oscillating third audio signal Sc.

And when the sound reinforcement system is run for the second time, the method strategy of modifying and adjusting Sb is applied, and the method strategy includes the amplification and reduction of the signal amplitude. In this embodiment, the aforementioned detection methods of the optimization algorithm include: voice activity detection, amplitude change, and frequency-amplitude comparison.

In the above implementation process, the algorithm is used to modify the amplitude of the echo signal without changing the input volume of the microphone or the volume of the speaker, so there is no modification to the parameters of the sound reinforcement system, and the operation is convenient.

Step 4: Process the first audio signal Sa, the second audio signal Sb and the third audio signal Sc to obtain a strategy for modifying and adjusting the third audio signal Sc.

In this step, the purpose of modifying and adjusting the third audio signal Sc is to optimize the third audio signal Sc, so that the obtained voice is clearer, the waveform is more stable and continuous, and it is convenient for the detection and calculation of the sound reinforcement delay to improve its accuracy. .

Step 5: Run the sound reinforcement system for the second time, apply the modification and adjustment method strategy, and use the algorithm to perform real-time adjustment processing on the third audio signal Sc.

In this step, the adjusted third audio signal Sc is a self-excited oscillation signal of the sound reinforcement system, as shown in FIG. 5 b , including a plurality of speech signal segments.

In this embodiment, the delay calculation and measurement method further includes: detecting whether the real delay between speech signal segments in the third audio signal Sc meets a preset threshold: if not, stop the operation of the sound reinforcement system; if If it is satisfied, continue to perform the operation of the delay measurement method.

In this embodiment, the real time delay can be regarded as the duration between two adjacent effective signal segments. If there is an abnormal amplitude or sudden change in the signal segment (such as noise interference) in the second intermediate signal, there may be some If the segment fails or is abnormal, the duration of the measured signal segment will also exceed the preset threshold, resulting in a larger error in the calculation of the final sound reinforcement delay, so it needs to be eliminated, so there will be the aforementioned detection of the third audio signal Sc Whether the real time delay between the middle voice signal segments meets the preset threshold, the previous real-time adjustment of the third audio signal Sc is also the optimization of the waveform, so that the second intermediate signal that meets the requirements can be obtained as much as possible. However, if multiple consecutive signal segments fail or have abnormal amplitudes, it proves that the system is operating abnormally or that audio transmission or algorithm processing is abnormal, and the operation of the sound reinforcement system needs to be stopped for self-check and abnormal troubleshooting.

Step 6: Use an algorithm to detect signal segments that meet the preset strength requirements in the third audio signal Sc, and calculate the system delay corresponding to the real delay between signal segments, and then use the statistical mode of all system delays as the sound reinforcement The application sound reinforcement delay of the system.

In some embodiments, the process of processing Sc to obtain sound reinforcement delay is briefly described by taking the third audio signal Sc shown in FIG. 5b as an example. Traversing through the aforementioned second intermediate signal (ie, the adjusted third audio signal Sc, hereinafter referred to as the third audio signal Sc), there will be a plurality of signal segments in the third audio signal Sc meeting the preset requirements. Calculate the real delay t0 between the signal segments that meet the requirements, then calculate the real delay t0 for all the real delays t0, then subtract the fixed delay from the real delay t0 to obtain the corresponding system delay t1, and then calculate all the obtained system delays t1 performs statistical counting, and obtains the system delay t1 with the most occurrences (that is, the mode number in the set) as the sound reinforcement delay of the sound reinforcement system.

As shown in FIG. 4 , in this embodiment, the first audio signal Sa starts to be transmitted to the speaker at time Ta. The sound from the speaker travels through the air to the pickup (microphone). The pickup converts the sound into an electrical signal and amplifies it to form a second audio signal Sb and transmits it to the delay measuring device (the box in the figure) at time Tb. After the second audio signal Sb is processed and calculated, it becomes the third audio signal Sc at time Tc. The third audio signal Sc is transmitted from the delay measuring device to the loudspeaker, repeating the process of the first audio signal Sa. In the above process, it can be considered that the sound reinforcement delay of the entire local sound reinforcement system is (Tc-Ta).

Combined with the table below, assuming that the 13 signal segments in the third audio signal Sc all meet the preset requirements, the sound reinforcement delay between them is calculated. Assume that the calculated results are shown in the table below. Counting all system delays, it is found that 47ms occurs most frequently, so it is finally considered that the sound reinforcement delay of the sound reinforcement system is 47ms.

In this embodiment, the sound reinforcement system is used to play the same sequence twice, and an algorithm is used to make the sound reinforcement system generate a self-excited oscillation signal, which is effectively used to avoid interference, and the delay is calculated based on the self-excited oscillation signal generated by the sound reinforcement system. When , the most frequent result is selected among multiple results, which improves the reliability of the algorithm and makes the calculation of the sound reinforcement delay more accurate.

Therefore, the delay measurement method for the sound reinforcement system provided by the embodiment of the present disclosure can automatically test and obtain the sound reinforcement delay of the system without manual intervention, has a high degree of intelligence and automation, is efficient and fast, and can effectively improve the sound reinforcement system. The accuracy and operability of delay measurement can avoid errors caused by manual intervention, save costs and improve debugging efficiency.

Fig. 6 shows a schematic diagram of an application model of a delay measurement device for a sound reinforcement system provided by an embodiment of the present disclosure.

Referring to FIG. 6, another embodiment of the present disclosure provides a delay measurement device 100 for a sound reinforcement system, which includes: an acquisition module 110, an input module 120, a processing module 140 and a calculation module 150,

Wherein, the input module 120 is used to set the fixed delay of the input voice; the acquisition module 110 is respectively connected to the loudspeaker and the microphone in the sound reinforcement system, and plays the preset first audio signal Sa through the loudspeaker, and uses the microphone to pick up the second audio Signal Sb; the processing module 140 is used to buffer the voice signal after the sound reinforcement for a fixed delay before processing, and process the second audio signal Sb into the third audio signal Sc through a voice algorithm; the calculation module 150 contains an algorithm module, It can be used to execute various algorithms described in the foregoing embodiments. In this embodiment, on the one hand, it is used to detect and calculate the self-excited oscillation information of the third audio signal Sc to obtain the sound reinforcement delay of the sound reinforcement system , on the other hand, can also be used to detect whether the preset threshold is satisfied between speech signal segments in the third audio signal Sc, and stop the operation of the sound reinforcement system if the preset requirement is not met.

In some embodiments, the aforementioned delay measurement device 100 may also include:

Gain control module 130, the gain control module 130 is used to respectively calculate the method strategies for modifying and adjusting the second audio signal Sb and the third audio signal Sc through an optimization algorithm, so as to obtain the adjustment parameters of the sound reinforcement system, and in the This adjustment method strategy is applied when the local sound reinforcement system is operated for the second time, and the obtained third audio signal Sc is adjusted in real time by using the aforementioned adjustment parameters. The method strategy includes but not limited to the amplification and reduction of the signal amplitude. In this embodiment, the aforementioned detection methods of the optimization algorithm include: voice activity detection, amplitude change, and frequency-amplitude comparison.

In this embodiment, the aforementioned processing module 140 is also used to execute:

Carrying out voice algorithm processing to the second audio signal Sb to obtain a first intermediate signal (not shown); and

The third audio signal Sc is processed by a speech algorithm using the adjustment parameters to obtain a second intermediate signal (not shown), wherein the first intermediate signal can meet the self-oscillating conditions of the sound reinforcement system to generate a third audio signal of self-oscillating The audio signal, the second intermediate signal includes a plurality of signal segments.

In some embodiments, the aforementioned calculation module 150 is used to perform detection and calculation according to the self-excited oscillation information of the third audio signal to obtain the sound reinforcement delay of the sound reinforcement system:

obtaining a plurality of signal segments in the aforementioned second intermediate signal;

Calculate the real delay between adjacent signal segments;

Subtract the fixed delay from the real delay to obtain its system delay; and

The sound reinforcement delay of the sound reinforcement system is obtained according to the statistical data of the system delay between a plurality of adjacent signal segments.

In a further embodiment, the delay measuring device 100 is based on the statistical mode of the system delay between the aforementioned multiple adjacent signal segments as the sound reinforcement delay of the sound reinforcement system.

To sum up, the delay measuring device 100 for sound reinforcement system provided by the embodiment of the present invention can improve the accuracy and operability of the delay measurement of the sound reinforcement system. Manual intervention can automatically test and obtain the system's PA delay, which can effectively avoid errors caused by manual intervention, save costs, and improve debugging efficiency. At the same time, the algorithm is used to modify the amplitude of the echo signal, which will not change the input volume of the microphone or the volume of the speaker, so there is no modification to the parameters of the sound reinforcement system, and the operation is convenient.

An embodiment of the present application provides an electronic device, including a memory and a processor. The memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the extended sound reinforcement system provided in the foregoing embodiments of the present application. time measurement method.

The embodiment of the present application provides a computer-readable storage medium, which stores computer program instructions. When the computer program instructions are read and run by a processor, the method for the sound reinforcement system provided in the foregoing embodiments of the present application is executed. Delay measurement method.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may also be implemented in other ways. The device embodiments described above are only illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the architecture, functions and possible implementations of devices, methods and computer program products according to multiple embodiments of the present application. operate. In this regard, each block in a flowchart or block diagram may represent a module, program segment, or part of code that includes one or more Executable instructions. It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks in succession may, in fact, be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. It should also be noted that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by a dedicated hardware-based system that performs the specified function or action , or may be implemented by a combination of dedicated hardware and computer instructions.

In addition, each functional module in each embodiment of the present application may be integrated to form an independent part, each module may exist independently, or two or more modules may be integrated to form an independent part.

If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read only memory (ROM, Read Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, and other media that can store program codes.

The above descriptions are only examples of the present application, and are not intended to limit the scope of protection of the present application. For those skilled in the art, various modifications and changes may be made to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application. It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

It should be noted that in the description of the present invention, it should be understood that the terms "upper", "lower", "inner" and the like indicate orientation or positional relationship, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating Or imply that the components or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the invention.

Furthermore, herein, the inclusive term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a set of elements includes not only those elements, but also Other elements not expressly listed, or inherent to the process, method, article, or apparatus are also included. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Finally, it should be noted that: obviously, the above-mentioned embodiments are only examples for clearly illustrating the present invention, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. However, obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims (12)

1. A delay measurement method for a sound amplification system, comprising:

playing a preset first audio signal for the first time by using a loudspeaker, picking up a second audio signal by using a sound pick-up, and processing the second audio signal into a third audio signal by using a voice algorithm;

obtaining an adjustment parameter of the sound amplification system according to the signal processing of the second audio signal and the third audio signal;

playing the first audio signal for the second time by using the loudspeaker, and adjusting the obtained third audio signal in real time by using the adjustment parameter;

and obtaining the sound amplification delay of the sound amplification system according to the self-oscillation information of the third audio signal.

2. The delay measurement method according to claim 1, wherein obtaining the tuning parameters of the sound amplification system from the second audio signal comprises:

performing speech algorithm processing on the second audio signal to obtain a first intermediate signal;

gain and/or amplitude adjusting the second audio signal into the first intermediate signal to obtain the adjustment parameter,

the first intermediate signal satisfies a self-oscillating condition of the sound amplification system to generate a self-oscillating third audio signal.

3. The delay measurement method according to claim 2, wherein obtaining the public address delay of the public address system from the self-oscillation information of the third audio signal comprises:

performing real-time speech algorithm processing on the third audio signal by using the adjustment parameter to obtain a second intermediate signal, wherein the second intermediate signal comprises a plurality of signal segments;

and determining the sound amplification time delay of the sound amplification system according to the second intermediate signal.

4. The delay measurement method of claim 3, wherein the speech algorithm processing comprises adding a fixed delay to the obtained audio signal.

5. The delay measurement method according to claim 4, wherein said determining the public address delay of the public address system from the second intermediate signal comprises:

obtaining a plurality of signal segments in the second intermediate signal;

calculating the real time delay between adjacent signal segments;

subtracting a fixed delay from the real delay to obtain a corresponding system delay; and

and obtaining the sound amplification delay of the sound amplification system according to the statistical data of the system delay among a plurality of adjacent signal segments.

6. The delay measurement method of claim 5, wherein obtaining the public address delay of the public address system according to the statistical data of the system delay between a plurality of adjacent signal segments comprises:

and taking the statistical mode of the system delay between a plurality of adjacent signal segments as the sound amplifying delay of the sound amplifying system.

7. The delay measurement method of claim 6, wherein calculating the true delay between adjacent signal segments comprises:

detecting whether the real time delay among the plurality of signal segments meets a preset threshold:

if not, stopping the operation of the sound reinforcement system;

and if so, continuing to execute the operation of the delay measurement method.

8. A delay measurement device for an acoustic amplification system, comprising:

the acquisition module is respectively connected with a loudspeaker and a sound pick-up in the sound reinforcement system, plays a preset first audio signal through the loudspeaker, and picks up a second audio signal through the sound pick-up;

the processing module is used for processing the second audio signal into a third audio signal through a voice algorithm;

the gain control module is used for obtaining an adjusting parameter of the sound amplifying system according to the signal processing of the second audio signal and the third audio signal and adjusting the obtained third audio signal in real time by using the adjusting parameter;

and the calculation module is used for carrying out detection calculation according to the self-excited oscillation information of the third audio signal so as to obtain the sound amplification delay of the sound amplification system.

9. The delay measurement device of claim 8, further comprising:

an input module for setting a fixed delay of input,

and the processing module is further used for executing:

performing speech algorithm processing on the second audio signal to obtain a first intermediate signal; and

and performing voice algorithm processing on the third audio signal by using the adjustment parameter to obtain a second intermediate signal, wherein the first intermediate signal can meet the self-oscillation condition of the sound amplifying system to generate a self-oscillating third audio signal, and the second intermediate signal comprises a plurality of signal segments.

10. A delay measuring apparatus as claimed in claim 9, wherein the calculating module is configured to perform, in performing detection calculation based on self-oscillation information of the third audio signal to obtain the public address delay of the public address system:

obtaining a plurality of signal segments in the second intermediate signal;

calculating the real time delay between adjacent signal segments;

subtracting a fixed delay from the real delay to correspondingly obtain the system delay; and

and obtaining the sound amplification delay of the sound amplification system according to the statistical data of the system delay among a plurality of adjacent signal segments.

11. An electronic device, characterized in that the electronic device comprises a memory for storing a computer program and a processor for executing the computer program to cause the electronic device to perform the delay measurement method for an acoustic amplification system of any one of claims 1 to 7.

12. A readable storage medium, having stored therein computer program instructions, which when read and executed by a processor, perform the delay measurement method for an acoustic amplification system according to any one of claims 1 to 7.

Images