CN103473005A - Method and device for performing sound effect control on played audio frequency - Google Patents

Abstract

The present invention discloses a method and device for controlling the sound effects of played audio. The present invention determines the audio playback terminal according to the waveform characteristics of the target frequency response curve currently input by the user by receiving the target frequency response curve currently input by the user. The waveform function of the filter; adjust the operating parameters of the filter so that the waveform curve output by the filter according to the determined waveform function is consistent with the target frequency response curve currently input by the user; control the filter according to the adjusted The working parameters of the filter output waveforms to the audio playing terminal for playing audio. Realize corresponding adjustment of the frequency response value of the audio playback terminal according to the instructions issued by the user, so as to adjust the sound quality of the audio played by the audio playback terminal to the sound quality corresponding to the user instruction.

Description

Method and device for sound effect control on played audio

technical field

The present invention relates to the field of audio playback, in particular to a method and device for controlling sound effects of played audio.

Background technique

Currently, audio playback terminals (for example, stereos or televisions) on the market have only one or several sound effect modes, and the system frequency responses corresponding to various sound effect modes are fixed. When the audio playback terminal plays audio, the user can only select one of the pre-stored audio modes for the audio playback terminal to play audio.

However, in fact, different users have different requirements for the sound quality of the audio played; some people like to listen to bass, and some people like to listen to treble or midrange. Existing audio player terminals with pre-stored fixed audio playback sound effect modes cannot dynamically adjust the frequency response value of the audio player terminal according to the user's demand for the sound effect of the played audio, so as to adjust to the user's expected sound quality.

Contents of the invention

The main purpose of the present invention is to provide a method and device for controlling the sound effects of played audio, aiming to adjust the frequency response value of the audio playback terminal according to the instructions issued by the user, so as to improve the sound quality of the audio played by the audio playback terminal. Adjust to the sound quality corresponding to the user command.

The present invention proposes a method for controlling sound effects of played audio, the method comprising:

Receiving the target frequency response curve currently input by the user, and determining the waveform function of the filter of the audio playback terminal according to the waveform characteristics of the target frequency response curve currently input by the user, the waveform characteristics including frequency and amplitude;

Adjusting the working parameters of the filter so that the waveform curve output by the filter according to the determined waveform function is consistent with the received target frequency response curve currently input by the user;

The filter is controlled to output waveforms to the audio playback terminal according to the adjusted operating parameters of the filter to play audio.

Preferably, after the step of receiving the target frequency response curve currently input by the user, the method further includes:

Analyze whether the target frequency response curve input again by the user is received within the preset time;

When the target frequency response curve input again by the user is not received within the preset time, the waveform function of the filter of the audio playback terminal is determined according to the waveform characteristics of the target frequency response curve currently input by the user;

When the target frequency response curve re-input by the user is received within the preset time, the waveform function of the filter of the audio playback terminal is determined according to the waveform characteristics of the received target frequency response curve re-input by the user.

Preferably, after the step of determining the waveform function of the filter of the audio playback terminal according to the waveform characteristics of the target frequency response curve currently input by the user, the method further includes:

Judging whether the curve corresponding to the waveform function of the filter of the determined audio playback terminal is consistent with the received target frequency response curve currently input by the user;

When the determined curve corresponding to the waveform function of the filter of the audio playback terminal is inconsistent with the received target frequency response curve currently input by the user, adjust the operating parameters of the filter so that the filter outputs according to the determined waveform function The waveform curve is consistent with the target frequency response curve currently input by the user;

When the determined curve corresponding to the waveform function of the filter of the audio playback terminal is consistent with the received target frequency response curve currently input by the user, the filter is controlled to output the waveform to the audio playback terminal according to the working parameters of the current filter. Play audio.

Preferably, the step of determining the waveform function of the filter of the audio playback terminal according to the waveform characteristics of the target frequency response curve currently input by the user further includes:

According to the amplitude-frequency characteristics of the filter, the received target frequency response curve currently input by the user is smoothed, and the waveform function of the filter of the audio playback terminal is determined according to the waveform feature of the smoothed target frequency response curve.

Preferably, before the step of receiving the target frequency response curve currently input by the user, the method includes:

A human-computer interaction interface is provided, and the human-computer interaction interface includes a coordinate system with the frequency as the horizontal axis and the amplitude as the vertical axis, for the user to input the target frequency response curve on the coordinate system on the human-computer interaction interface.

Preferably, the waveform function is: G(fa)=H _HP ² (f ₀ , f _a , Q)+H _peak (f ₀ , f _a , Q ₀ , G ₀ )+H _peak (f ₁ , f _a , Q ₁ , G ₁ ), where, G(f _a ) is the corresponding amplitude value at the frequency point f _a ; H _HP ² (f ₀ , f _a , Q) means the second-order high-pass filter ① at point f _a The amplitude value at , where f ₀ is the characteristic frequency, Q is the quality factor; H _peak (f ₀ , f _a , Q ₀ , G ₀ ) represents the amplitude value at point f _a of frequency selective filtering ②; where f ₀ is Eigenfrequency, Q ₀ is the quality factor of the frequency selective filter ②, G ₀ is the gain value of the frequency selective filter ②; H _peak (f ₁ , f _a , Q ₁ , G ₁ ) means that the frequency selective filter ③ is at point f _a The amplitude value; f ₁ is the characteristic frequency, Q ₁ is the quality factor of the frequency selective filter ③, and G ₁ is the gain value of the frequency selective filter ③.

The present invention also proposes a device for controlling sound effects of played audio, the device comprising:

The data receiving and sending module is used to receive the target frequency response curve currently input by the user;

The processing module is used to determine the waveform function of the filter of the audio playback terminal according to the waveform characteristics of the target frequency response curve currently input by the user, and the waveform characteristics include frequency and amplitude;

An adjustment module, configured to adjust the working parameters of the filter so that the waveform curve output by the filter according to the determined waveform function is consistent with the received target frequency response curve currently input by the user;

The control module is used to control the filter to output waveforms to the audio playback terminal according to the adjusted working parameters of the filter to play audio.

Preferably, the device also includes an analysis module,

The analysis module is used to analyze whether the target frequency response curve input again by the user is received within the preset time;

The processing module is used to determine the waveform of the filter of the audio playback terminal according to the waveform characteristics of the received target frequency response curve input by the user when the target frequency response curve input again by the user is not received within the preset time function; or

When the target frequency response curve re-input by the user is received within the preset time, the waveform function of the filter of the audio playback terminal is determined according to the waveform characteristics of the received target frequency response curve re-input by the user.

Preferably, the analysis module is also used to judge whether the determined curve corresponding to the waveform function of the filter of the audio playback terminal is consistent with the received target frequency response curve currently input by the user;

The processing module is configured to adjust the operating parameters of the filter so that the filter is The waveform curve output according to the determined waveform function is consistent with the received target frequency response curve currently input by the user;

The control module is configured to control the filter to output the waveform according to the working parameters of the current filter when the determined curve corresponding to the waveform function of the filter of the audio playback terminal is consistent with the received target frequency response curve currently input by the user Give the audio playing terminal to play audio.

Preferably, the processing module is further configured to smooth the target frequency response curve currently input by the user according to the amplitude-frequency characteristics of the filter, and determine the audio playback terminal according to the waveform characteristics of the smoothed target frequency response curve The wave function of the filter.

Preferably, the data sending and receiving module is also used to provide a human-computer interaction interface, the human-computer interaction interface includes a coordinate system with the frequency as the horizontal axis and the amplitude as the vertical axis, for the user to coordinate on the human-computer interaction interface Enter the target frequency response curve.

Preferably, the waveform function is: G(fa)=H _HP ² (f ₀ , f _a , Q)+H _peak (f ₀ , f _a , Q ₀ , G ₀ )+H _peak (f ₁ , f _a , Q ₁ , G ₁ ), where, G(f _a ) is the corresponding amplitude value at the frequency point f _a ; H _HP ² (f ₀ , f _a , Q) means the second-order high-pass filter ① at point f _a The amplitude value at , where f ₀ is the characteristic frequency, Q is the quality factor; H _peak (f ₀ , f _a , Q ₀ , G ₀ ) represents the amplitude value at point f _a of frequency selective filtering ②; where f ₀ is Eigenfrequency, Q ₀ is the quality factor of the frequency selective filter ②, G ₀ is the gain value of the frequency selective filter ②; H _peak (f ₁ , f _a , Q ₁ , G ₁ ) means that the frequency selective filter ③ is at point f _a The amplitude value; f ₁ is the characteristic frequency, Q ₁ is the quality factor of the frequency selective filter ③, and G ₁ is the gain value of the frequency selective filter ③.

Compared with the prior art, the present invention determines the waveform function of the filter of the audio playback terminal according to the waveform characteristics of the target frequency response curve currently input by the user; adjusts the operating parameters of the filter so that the filter follows the determined waveform The waveform curve output by the function is consistent with the target frequency response curve currently input by the user; the filter is controlled to output the waveform to the audio playback terminal according to the adjusted working parameters of the filter to play audio. Realize corresponding adjustment of the frequency response value of the audio playback terminal according to the instructions issued by the user, so as to adjust the sound quality of the audio played by the audio playback terminal to the sound quality corresponding to the user instruction.

Description of drawings

Fig. 1 is the specific flowchart of the first embodiment of the method for controlling the sound effect of the audio played by the present invention;

Fig. 2 is the schematic diagram of the target curve input by the user of the present invention;

Fig. 3 is the specific flow chart of the second embodiment of the method for controlling the sound effects of the played audio in the present invention;

Fig. 4 is the specific flow chart of the third embodiment of the method for controlling the sound effects of the played audio in the present invention;

Fig. 5 is a specific flow chart of the first embodiment of the device for controlling the sound effect of the played audio according to the present invention;

FIG. 6 is a specific flow chart of the second embodiment of the device for controlling the sound effects of played audio according to the present invention.

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

As shown in Figures 1 and 2, Figure 1 is a specific flow chart of the first embodiment of the method for controlling sound effects of played audio in the present invention, and Figure 2 is a schematic diagram of the target curve input by the user in the present invention.

It should be emphasized that the flow chart shown in Figure 1 is only a preferred embodiment, and those skilled in the art will know that any embodiment constructed around the idea of the present invention should not deviate from the scope covered by the following technical solutions:

Receive the target frequency response curve currently input by the user, determine the waveform function of the filter of the audio playback terminal according to the waveform characteristics of the target frequency response curve currently input by the user, the waveform characteristics include frequency and amplitude; adjust the filter Working parameters so that the waveform curve output by the filter according to the determined waveform function is consistent with the target frequency response curve currently input by the user; control the filter to output the waveform to the audio frequency according to the adjusted working parameters of the filter Play Terminal to play audio.

The following are specific steps for gradually implementing sound effect control on the played audio in this embodiment:

Step S11, receiving the target frequency response curve currently input by the user.

Specifically, a human-computer interaction interface is provided, the human-computer interaction interface includes a coordinate system with the frequency as the horizontal axis and the amplitude as the vertical axis, for the user to input the target frequency response curve on the coordinate system on the human-computer interaction interface; The frequency and amplitude on the coordinate system included in the human-computer interaction interface correspond to the frequency and amplitude actually played by the audio playback terminal. When the user inputs the target frequency response curve in the coordinate system on the human-computer interaction interface, the target frequency response curve currently input by the user is received, and the received target frequency response curve is smoothed according to the amplitude-frequency characteristics of the filter .

Step S12: Determine the waveform function of the filter of the audio playback terminal according to the received waveform characteristics of the target frequency response curve currently input by the user, the waveform characteristics including frequency and amplitude.

Specifically, referring to FIG. 2 , after smoothing the received target frequency response curve currently input by the user according to the amplitude-frequency characteristic of the filter, the filter type is selected according to the characteristics of the target frequency response curve currently input by the user, Wherein, the waveform characteristics of the target frequency response curve may include frequency and amplitude, and may also include gain, etc., which are not limited here. And the filter includes high-pass filter, low-pass filter, band-pass filter or band-stop filter, etc.; select one or more filters according to the waveform characteristics (gain or attenuation) of the curve, and select one or more filters according to the type of filter Determine the waveform function of the filter of the audio playback terminal, which can be G(fa)=H _HP ² (f ₀ , f _a , Q)+H _peak (f ₀ , f _a , Q ₀ , G ₀ )+H _peak ( f ₁ , f _a , Q ₁ , G ₁ ), G(f _a ) is the amplitude value corresponding to the frequency point f _a ; H _HP ² (f ₀ , f _a , Q) means the second-order high-pass filter ① at f The amplitude value at point _a , where f ₀ is the characteristic frequency, and Q is the quality factor; H _peak (f ₀ , f _a , Q ₀ , G ₀ ) represents the amplitude value at point f _a of frequency selective filtering ②; where f ₀ is the characteristic frequency, Q ₀ is the quality factor of the frequency selective filter ②, G ₀ is the gain value of the frequency selective filter ②; H _peak (f ₁ , f _a , Q ₁ , G ₁ ) means that the frequency selective filter ③ is at f _a The amplitude value at the point; where f ₁ is the characteristic frequency, Q ₁ is the quality factor of the frequency selective filter ③, G ₁ is the gain value of the frequency selective filter ③, and the filters ①, ② and ③ are shown in Figure 2.

Step S13 , adjusting the working parameters of the filter so that the waveform curve output by the filter according to the determined waveform function is consistent with the received target frequency response curve currently input by the user.

Specifically, after the type of filter is selected according to the waveform characteristics of the target frequency response curve currently input by the user, and the waveform function of the filter of the audio playback terminal is determined, the operating parameters of the filter are adjusted so that the The waveform curve output by the filter according to the determined waveform function is consistent with the target frequency response curve currently input by the user, wherein the parameters of the filter include center frequency, cutoff frequency, passband bandwidth, insertion loss or ripple, etc. After adjusting the operating parameters of the filter, it is judged whether the waveform curve output by the waveform function of the filter of the determined audio playback terminal after adjusting the filter parameters is consistent with the received target frequency response curve of the user's current input, and the filter is adjusted When the waveform curve output by the waveform function of the filter of the determined audio playback terminal after the filter parameters is consistent with the received target frequency response curve currently input by the user, perform the following step S14; or when the determined audio frequency after adjusting the filter parameters When the waveform curve output by the function after the waveform function of the filter of the playback terminal is inconsistent with the target frequency response curve currently input by the user, continue to adjust the working parameters of the filter until the filter outputs according to the determined waveform function The waveform curve of is consistent with the target frequency response curve currently input by the user.

Step S14, controlling the filter to output waveforms to the audio playback terminal according to the adjusted working parameters to play audio.

Specifically, after adjusting the filter parameters, when the waveform curve output by the determined waveform function of the filter of the audio playback terminal is consistent with the received target frequency response curve currently input by the user, the current parameter value of the filter is determined and saved, that is, The adjusted filter parameters are saved, sorted and generated EQ (sound effect) data, and written into the DSP (digital signal processing) power amplifier through the data input and output interface, and the DSP power amplifier modifies the corresponding function register of the DSP power amplifier according to the written EQ data. The waveform curve output by the audio playback terminal is consistent with the target frequency response curve, and the sound quality expected by the user is output. Referring to Figure 2, for example, by obtaining the frequency and amplitude values of the three frequency-selective filters ①, ② and ③ on the target curve, respectively substitute the frequency and amplitude values of the three frequency-selective filters ①, ② and ③ into the function G (f _a )=H _HP ² (f ₀ , f _a , Q)+H _peak (f ₀ , f _a , Q ₀ , G ₀ )+H _peak (f ₁ , f _a , Q ₁ , G ₁ ), Get f ₀ =55Hz, Q=1.5 of frequency selective filter ①, f ₀ =800Hz, Q=1.8, G ₀ =4 of frequency selective filter ②, f ₀ =5000Hz, Q=1.8, G ₀ of frequency selective filter ③ =-3.8, the waveform curve output by the function is consistent with the target frequency response curve, save the corresponding three frequency selection filter parameters, and organize them into EQ data and write them into the DSP power amplifier, and the DSP power amplifier modifies the DSP power amplifier accordingly according to the received EQ data The function register, so that the waveform curve output by the audio playback terminal (DSP power amplifier) is consistent with the target frequency response curve, and the sound quality expected by the user is output.

By determining the waveform function of the filter of the audio playback terminal according to the waveform characteristics of the target frequency response curve currently input by the user; adjusting the operating parameters of the filter so that the waveform curve output by the filter according to the determined waveform function is consistent with The received target frequency response curve currently input by the user is consistent; the filter is controlled to output a waveform to the audio playback terminal to play audio according to the adjusted working parameters of the filter. Realize corresponding adjustment of the frequency response value of the audio playback terminal according to the instructions issued by the user, so as to adjust the sound quality of the audio played by the audio playback terminal to the sound quality corresponding to the user instruction.

As shown in FIG. 3 , it is a specific flow chart of the second embodiment of the method for controlling the sound effects of played audio in the present invention.

Based on the first embodiment above, after step S11, further include:

Step S15, analyzing whether the target frequency response curve input again by the user is received within the preset time.

Specifically, preset a time, which can be a time value set by the user in advance, such as 5s or 10s. When the target frequency response data currently input by the user is received, analyze whether the target input again by the user is received within the preset time. Frequency response curve, that is, when the user is not satisfied with the target frequency response curve currently input, continue to input the target frequency response curve again. When the target frequency response curve re-input by the user is received within the preset time, the following step S16 is performed, and when the target frequency response curve re-input by the user is not received within the preset time, step S12 is performed.

Step S16, when receiving the target frequency response curve re-input by the user within the preset time, determine the waveform function of the filter of the audio playback terminal according to the waveform characteristics of the received target frequency response curve re-input by the user.

Specifically, when the target frequency response curve re-input by the user is received within the preset time, the waveform function of the filter of the audio playback terminal is determined according to the characteristics of the received target frequency response curve re-input by the user. The target frequency response curve input before the preset time responds, that is, the re-input target frequency response curve received by default is used as the target sound effect curve expected by the user.

By presetting a time, when the target frequency response curve input again by the user is received within the preset time, the waveform function of the filter of the audio playback terminal is determined according to the waveform characteristics of the target frequency response curve input again by the user, instead of Determine the waveform function of the filter of the audio playback terminal according to the waveform characteristics of the target frequency response curve input by the user before the preset time, so as to avoid making changes to all received target frequency response curves when the user continuously inputs the target frequency response curve Response, improve the operating speed of the system, and timely determine the filter parameters corresponding to the target frequency response curve expected by the user, so as to control the audio playback terminal to output the sound effect expected by the user.

As shown in FIG. 4 , it is a specific flow chart of the third embodiment of the method for controlling the sound effects of played audio according to the present invention.

Based on the first embodiment above, after step S12, it also includes:

Step S17, judging whether the waveform curve output by the determined waveform function of the filter of the audio playback terminal is consistent with the received target frequency response curve currently input by the user.

Step S18, when the waveform curve output by the waveform function of the filter of the determined audio playback terminal is consistent with the target frequency response curve currently input by the user, control the filter to output waveforms to the audio player according to the current working parameters Terminal to play audio.

By determining the waveform function of the filter of the audio playback terminal, it is judged whether the waveform curve output by the waveform function of the filter of the determined audio playback terminal is consistent with the received target frequency response curve currently input by the user, and in the determined audio When the waveform curves output by the waveform function of the filter of the playback terminal are consistent, the filter is controlled to output a waveform to the audio playback terminal according to the current operating parameters to play audio. Quickly find the determined filter operating parameter value in which the waveform curve output by the waveform function of the filter of the audio playback terminal is consistent with the target frequency response curve, so as to play the sound effect expected by the user.

As shown in FIG. 5 , it is a specific flow chart of the first embodiment of the device for controlling the sound effects of played audio according to the present invention. The device comprises: a data receiving and sending module 10, a processing module 20, an adjustment module 30 and a control module 40,

The data sending and receiving module 10 is configured to receive the target frequency response curve currently input by the user.

Specifically, the data sending and receiving module 10 provides a human-computer interaction interface, and the human-computer interaction interface includes a coordinate system with frequency as the horizontal axis and amplitude as the vertical axis, for the user to input the target frequency on the coordinate system on the human-computer interaction interface. Response curve; the frequency and amplitude on the coordinate system included in the human-computer interaction interface correspond to the frequency and amplitude actually played by the audio playback terminal.

The processing module 20 is configured to determine the waveform function of the filter of the audio playback terminal according to the received waveform characteristics of the target frequency response curve currently input by the user, the waveform characteristics including frequency and amplitude.

Specifically, when the user inputs the target frequency response curve in the coordinate system on the human-computer interaction interface, the data receiving and transmitting module 10 receives the target frequency response curve currently input by the user, and the processing module 20 analyzes the received user's frequency response curve according to the amplitude-frequency characteristic of the filter. The current input target frequency response curve is smoothed. With reference to Fig. 2, after the processing module 20 smoothes the target frequency response curve of the user's current input according to the amplitude-frequency characteristics of the filter, the filter type is selected according to the characteristics of the target frequency response curve of the user's current input, The filter includes a high-pass filter, a low-pass filter, a band-pass filter or a band-stop filter, etc.; select one or more filters according to the waveform characteristics (gain or attenuation) of the curve, and determine according to the type of the selected filter The waveform function of the filter of the audio playback terminal can be G(fa)=H _HP ² (f ₀ , f _a , Q)+H _peak (f ₀ , f _a , Q ₀ , G ₀ )+H _peak (f ₁ , f _a , Q ₁ , G ₁ ), G(f _a ) is the amplitude value corresponding to the frequency point f _a ; H _HP ² (f ₀ , f _a , Q) means the second-order high-pass filter ① at f _a The amplitude value at the point, where f ₀ is the characteristic frequency, Q is the quality factor; H _peak (f ₀ , f _a , Q ₀ , G ₀ ) represents the amplitude value of the frequency selective filter ② at point f _a ; where f ₀ is the characteristic frequency, Q ₀ is the quality factor of frequency selective filter ②, G ₀ is the gain value of frequency selective filter ②; H _peak (f ₁ , f _a , Q ₁ , G ₁ ) means that frequency selective filter ③ is at point f _a where f ₁ is the characteristic frequency, Q ₁ is the quality factor of the frequency selective filter ③, G ₁ is the gain value of the frequency selective filter ③, and the filters ①, ② and ③ are shown in Figure 2.

The adjustment module 30 is configured to adjust the working parameters of the filter so that the waveform curve output by the filter according to the determined waveform function is consistent with the received target frequency response curve currently input by the user.

Specifically, after the processing module 20 selects the type of filter according to the waveform characteristics of the target frequency response curve currently input by the user, and determines the waveform function of the filter of the audio playback terminal, the adjustment module 30 adjusts the operation of the filter. parameters, so that the waveform curve output by the filter according to the determined waveform function is consistent with the target frequency response curve currently input by the user, wherein the parameters of the filter include center frequency, cutoff frequency, passband bandwidth, insertion loss or ripple etc. After adjusting the operating parameters of the filter, the analysis module 50 judges whether the waveform curve output by the waveform function of the filter of the determined audio playback terminal after adjusting the filter parameters is consistent with the received target frequency response curve currently input by the user, When the waveform curve output by the waveform function of the filter of the determined audio playback terminal after adjusting the filter parameters is consistent with the received target frequency response curve currently input by the user, the control module 40 controls the filter according to the adjusted filter The working parameter output waveform is given to the audio playback terminal to play audio; or when the waveform function of the filter waveform function of the determined audio playback terminal is adjusted after the filter parameters, the waveform curve of the function output is consistent with the target frequency input by the user currently received. When the response curves are inconsistent, the adjustment module 30 continues to adjust the working parameters of the filter until the waveform curve output by the filter according to the determined waveform function is consistent with the received target frequency response curve currently input by the user.

The control module 40 is configured to control the filter to output waveforms to the audio playback terminal according to the adjusted operating parameters of the filter to play audio.

Specifically, after adjusting the filter parameters, when the waveform curve output by the determined waveform function of the filter of the audio playback terminal is consistent with the received target frequency response curve currently input by the user, the control module 40 determines the current parameter value of the filter and Save, save the adjusted filter parameters, organize and generate EQ (sound effect) data, write it into the DSP (digital signal processing) power amplifier through the data input and output interface, and the DSP power amplifier modifies the corresponding DSP power amplifier according to the written EQ data The function register is used to make the waveform curve output by the audio playback terminal consistent with the target frequency response curve, and output the sound quality expected by the user. Referring to Fig. 2, for example, the processing module 20 obtains the frequency and amplitude values of the three frequency-selective filters ①, ② and ③ on the target curve, respectively obtains the frequency and amplitude values of the three frequency-selective filters ①, ② and ③ Substitute the function G(f _a )=H _HP ² (f ₀ , f _a , Q)+H _peak (f ₀ , f _a , Q ₀ , G ₀ )+H _peak (f ₁ , f _a , Q ₁ , G ₁ ), get f ₀ =55Hz, Q=1.5 of frequency selective filter ①, f ₀ =800Hz, Q=1.8, G ₀ =4 of frequency selective filter ②, f ₀ =5000Hz, Q=1.8 of frequency selective filter ③ , when G ₀ =-3.8, the waveform curve output by the function is consistent with the target frequency response curve, and the control module 40 saves the corresponding three frequency selection filter parameters, and organizes them into EQ data and writes them into the DSP power amplifier, and the DSP power amplifier is based on the received EQ The data correspondingly modifies the function register of the DSP power amplifier, so that the waveform curve output by the audio playback terminal (DSP power amplifier) is consistent with the target frequency response curve, and the sound quality expected by the user is output.

Determine the waveform function of the filter of the audio playback terminal according to the waveform characteristics of the received user's current input target frequency response curve by the processing module 20; the adjustment module 30 adjusts the operating parameters of the filter so that the filter follows the determined waveform The waveform curve output by the function is consistent with the target frequency response curve currently input by the user; the control module 40 controls the filter to output the waveform to the audio playback terminal according to the adjusted working parameters of the filter to play audio. Realize corresponding adjustment of the frequency response value of the audio playback terminal according to the instructions issued by the user, so as to adjust the sound quality of the audio played by the audio playback terminal to the sound quality corresponding to the user instruction.

As shown in FIG. 6 , it is a specific flow chart of the second embodiment of the device for controlling the sound effects of played audio according to the present invention. The device also includes an analysis module 50,

The analysis module 50 is configured to analyze whether the target frequency response curve input again by the user is received within the preset time.

Specifically, the analysis module 50 presets a time, which may be a time value set by the user in advance such as 5s or 10s, and analyzes whether the user receives another frequency response data within the preset time when receiving the target frequency response data currently input by the user. The input target frequency response curve, that is, when the user is not satisfied with the currently input target frequency response curve, continue to input the target frequency response curve again.

The processing module 20 is configured to determine the filter of the audio playback terminal according to the waveform characteristics of the target frequency response curve currently input by the user when the target frequency response curve input by the user is not received within the preset time. wave function; or

When the target frequency response curve re-input by the user is received within the preset time, the waveform function of the filter of the audio playback terminal is determined according to the waveform characteristics of the received target frequency response curve re-input by the user.

Specifically, when receiving the target frequency response curve re-input by the user within the preset time, the processing module 20 determines the waveform function of the filter of the audio playback terminal according to the characteristics of the received target frequency response curve re-input by the user. Responding to the received target frequency response curve input by the user before the preset time, that is, the re-input target frequency response curve received by default is used as the user's expected target sound effect curve.

A time is preset by the analysis module 50, and when the target frequency response curve input again by the user is received within the preset time, the processing module 20 determines the filter of the audio playback terminal according to the waveform characteristics of the target frequency response curve input again by the user. The waveform function of the filter of the audio playback terminal is not determined according to the waveform characteristics of the target frequency response curve input by the user before the preset time, so as to avoid the user’s continuous input of the target frequency response curve. Respond to the target frequency response curve, improve the system operating speed, and timely determine the filter parameters corresponding to the user's expected target frequency response curve, so as to control the audio playback terminal to output the user's expected sound effect.

Further, the analysis module 50 is also used to judge whether the determined curve corresponding to the waveform function of the filter of the audio playback terminal is consistent with the received target frequency response curve currently input by the user;

The processing module 20 is configured to adjust the operating parameters of the filter so that the filtering The waveform curve output by the device according to the determined waveform function is consistent with the received target frequency response curve currently input by the user;

The control module 40 is configured to control the filter to output according to the working parameters of the current filter when the determined curve corresponding to the waveform function of the filter of the audio playback terminal is consistent with the target frequency response curve currently input by the user. The waveform is sent to the audio playback terminal to play audio.

When the waveform function of the filter of the determined audio playback terminal is determined, the analysis module 50 judges whether the waveform curve output by the waveform function of the filter of the determined audio playback terminal is consistent with the target frequency response curve currently input by the user received, and When the determined waveform curves output by the waveform function of the filter of the audio playback terminal are consistent, the control module 40 controls the filter to output a waveform to the audio playback terminal according to the current operating parameters to play audio. Quickly find the determined filter operating parameter value in which the waveform curve output by the waveform function of the filter of the audio playback terminal is consistent with the target frequency response curve, so as to play the sound effect expected by the user.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related All technical fields are equally included in the scope of patent protection of the present invention.

Claims (12)

1. A method for performing sound effect control on played audio, characterized in that the method comprises: Receiving the target frequency response curve currently input by the user, and determining the waveform function of the filter of the audio playback terminal according to the waveform characteristics of the target frequency response curve currently input by the user, the waveform characteristics including frequency and amplitude; Adjusting the working parameters of the filter so that the waveform curve output by the filter according to the determined waveform function is consistent with the received target frequency response curve currently input by the user; The filter is controlled to output waveforms to the audio playback terminal according to the adjusted working parameters to play audio. 2. The method for controlling the sound effect of the played audio according to claim 1, characterized in that, after the step of receiving the target frequency response curve currently input by the user, the method further comprises: Analyze whether the target frequency response curve input again by the user is received within the preset time; When the target frequency response curve input again by the user is not received within the preset time, the waveform function of the filter of the audio playback terminal is determined according to the waveform characteristics of the target frequency response curve currently input by the user; When the target frequency response curve re-input by the user is received within the preset time, the waveform function of the filter of the audio playback terminal is determined according to the waveform characteristics of the received target frequency response curve re-input by the user. 3. The method according to claim 1 or 2, wherein the sound effect control of the played audio is characterized in that, in the process of determining the filter of the audio playback terminal according to the waveform characteristics of the target frequency response curve input by the user currently received After the wave function step, the method also includes: Judging whether the waveform curve output by the waveform function of the filter of the determined audio playback terminal is consistent with the received target frequency response curve currently input by the user; When the waveform curve output by the determined waveform function of the filter of the audio playback terminal is inconsistent with the target frequency response curve currently input by the user, adjust the operating parameters of the filter so that the filter outputs according to the determined waveform function The waveform curve of is consistent with the target frequency response curve currently input by the user; When the waveform curve output by the waveform function of the filter of the determined audio playback terminal is consistent with the received target frequency response curve currently input by the user, the filter is controlled to output the waveform to the audio playback terminal according to the current operating parameters for playback audio. 4. The method for controlling the sound effect of the played audio according to claim 1, characterized in that the wave function of the filter of the audio playback terminal is determined according to the waveform characteristics of the received user's current input target frequency response curve Steps also include: According to the amplitude-frequency characteristics of the filter, the received target frequency response curve currently input by the user is smoothed, and the waveform function of the filter of the audio playback terminal is determined according to the waveform feature of the smoothed target frequency response curve. 5. The method for controlling sound effects of played audio according to claim 1 or 2, characterized in that, before the step of receiving the target frequency response curve currently input by the user, the method comprises: A human-computer interaction interface is provided, and the human-computer interaction interface includes a coordinate system with the frequency as the horizontal axis and the amplitude as the vertical axis, for the user to input the target frequency response curve on the coordinate system on the human-computer interaction interface. 6. The method for controlling sound effects of played audio according to claim 1, wherein the waveform function is: G(fa)=H _HP ² (f ₀ , f _a , Q)+H _peak ( f ₀ , f _a , Q ₀ , G ₀ )+H _peak (f ₁ , f _a , Q ₁ , G ₁ ), where G(f _a ) is the corresponding amplitude value at the frequency point f _a ; H _HP ² (f ₀ , f _a , Q) represent the amplitude value of the second-order high-pass filter ① at f _a point, where f ₀ is the characteristic frequency, Q is the quality factor; H _peak (f ₀ , f _a , Q ₀ , G ₀ ) represents the amplitude value of the frequency selective filter ② at f _a point; where f ₀ is the characteristic frequency, Q ₀ is the quality factor of the frequency selective filter ②, G ₀ is the gain value of the frequency selective filter ②; H _peak (f ₁ , f _a , Q ₁ , G ₁ ) represent the amplitude value of the frequency selective filter ③ at point f _a ; f ₁ is the characteristic frequency, Q ₁ is the quality factor of the frequency selective filter ③, and G ₁ is the gain of the frequency selective filter ③ value. 7. A device for performing sound effect control on played audio, characterized in that the device comprises: The data receiving and sending module is used to receive the target frequency response curve currently input by the user; The processing module is used to determine the waveform function of the filter of the audio playback terminal according to the waveform characteristics of the target frequency response curve currently input by the user, and the waveform characteristics include frequency and amplitude; An adjustment module, configured to adjust the working parameters of the filter so that the waveform curve output by the filter according to the determined waveform function is consistent with the received target frequency response curve currently input by the user; The control module is used to control the filter to output waveforms to the audio playback terminal according to the adjusted working parameters of the filter to play audio. 8. The device for controlling the sound effect of the played audio according to claim 7, characterized in that the device further comprises an analysis module, The analysis module is used to analyze whether the target frequency response curve input again by the user is received within the preset time; The processing module is used to determine the waveform of the filter of the audio playback terminal according to the waveform characteristics of the received target frequency response curve input by the user when the target frequency response curve input again by the user is not received within the preset time function; or When the target frequency response curve re-input by the user is received within the preset time, the waveform function of the filter of the audio playback terminal is determined according to the waveform characteristics of the received target frequency response curve re-input by the user. 9. The device for controlling sound effects of played audio according to claim 7 or 8, characterized in that, The analysis module is also used to judge whether the curve corresponding to the waveform function of the filter of the determined audio playback terminal is consistent with the received target frequency response curve currently input by the user; The processing module is configured to adjust the operating parameters of the filter so that the filter is The waveform curve output according to the determined waveform function is consistent with the received target frequency response curve currently input by the user; The control module is configured to control the filter to output the waveform according to the working parameters of the current filter when the determined curve corresponding to the waveform function of the filter of the audio playback terminal is consistent with the received target frequency response curve currently input by the user Give the audio playing terminal to play audio. 10. The device for sound effect control of played audio according to claim 7, characterized in that: The processing module is also used to smooth the target frequency response curve currently input by the user according to the amplitude-frequency characteristics of the filter, and determine the filter of the audio playback terminal according to the waveform characteristics of the smoothed target frequency response curve wave function. 11. The device for controlling the sound effect of the played audio according to claim 7 or 8, characterized in that, The data sending and receiving module is also used to provide a human-computer interaction interface, the human-computer interaction interface includes a coordinate system with frequency as the horizontal axis and amplitude as the vertical axis, for users to input on the coordinate system on the human-computer interaction interface Target frequency response curve. 12. The device for controlling sound effects of played audio according to claim 7, wherein the waveform function is: G(fa)=H _HP ² (f ₀ , f _a , Q)+H _peak ( f ₀ , f _a , Q ₀ , G ₀ )+H _peak (f ₁ , f _a , Q ₁ , G ₁ ), where G(f _a ) is the corresponding amplitude value at the frequency point f _a ; H _HP ² (f ₀ , f _a , Q) represent the amplitude value of the second-order high-pass filter ① at f _a point, where f ₀ is the characteristic frequency, Q is the quality factor; H _peak (f ₀ , f _a , Q ₀ , G ₀ ) represents the amplitude value of the frequency selective filter ② at f _a point; where f ₀ is the characteristic frequency, Q ₀ is the quality factor of the frequency selective filter ②, G ₀ is the gain value of the frequency selective filter ②; H _peak (f ₁ , f _a , Q ₁ , G ₁ ) represent the amplitude value of the frequency selective filter ③ at point f _a ; f ₁ is the characteristic frequency, Q ₁ is the quality factor of the frequency selective filter ③, and G ₁ is the gain of the frequency selective filter ③ value.

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