CN113342304A - Audio data processing method and device, terminal equipment and storage medium - Google Patents
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Abstract
The application is applicable to the field of audio data processing, and discloses a method and a device for processing audio data, terminal equipment and a readable storage medium, wherein the method comprises the following steps: acquiring a plurality of sampling point data from audio data of audio to be played; calculating an original decibel value of the audio to be played according to the plurality of sampling point data; processing the audio data of the audio to be played according to the original decibel value and a preset standard decibel value so as to adjust the original decibel value of the audio to be played to the standard decibel value; outputting the processed audio data through a power amplifier module; and the output volume of the processed audio data during output is the standard output volume corresponding to the standard decibel value. According to the method and the device, the output volume is always the standard volume when different audio files are processed, the output standardization of the audio files is realized, and a user can hear the sound with the same volume at the same volume level when different audio files are played.
Description
Technical Field
The present application relates to the field of audio data processing, and in particular, to a method and an apparatus for processing audio data, a terminal device, and a storage medium.
Background
With the rapid development of science and technology, users have higher and higher requirements on audio playing, and have higher requirements on an audio playing system, such as intelligent song changing, while pursuing high-quality audio.
When playing the audio of different sound source files, the existing audio playing systems on the market have different volume levels of playing music even at the same volume level, and especially play the audio in a high-power audio system pursuing being personally on the scene, and the difference can be amplified, thereby influencing the listening experience of users. Generally, a user needs to manually adjust the volume levels until the sound level meets the listening requirement of the user when playing different sound source files, the operation is complicated, the method only amplifies or reduces the volume between fixed volume levels, and the playing effect of audio is poor.
Disclosure of Invention
The embodiment of the application discloses a processing method and device of audio data and a storage medium of terminal equipment, which can enable the audio data of different sound source files to output volume according to a standard, effectively improve the volume difference when the audio data from the different sound source files are output, and improve the audio playing effect.
The embodiment of the application discloses a method for processing audio data, which comprises the following steps:
acquiring a plurality of sampling point data from audio data of audio to be played;
calculating an original decibel value of the audio to be played according to the plurality of sampling point data;
processing the audio data of the audio to be played according to the original decibel value and a preset standard decibel value so as to adjust the original decibel value of the audio to be played to the standard decibel value;
outputting the processed audio data through a power amplifier module; and the output volume of the processed audio data during output is the standard output volume corresponding to the standard decibel value.
The embodiment of the application discloses an audio data's processing apparatus includes:
the sampling module is used for acquiring a plurality of sampling point data from the audio data of the audio to be played;
the decibel value calculation module is used for calculating the original decibel value of the audio to be played according to the plurality of sampling point data;
the audio data adjusting module is used for processing the audio data of the audio to be played according to the original decibel value and a preset standard decibel value so as to adjust the original decibel value of the audio to be played to the standard decibel value;
the power amplifier module is used for outputting the processed audio data; and the output volume of the processed audio data during output is the standard output volume corresponding to the standard decibel value.
The embodiment of the application discloses terminal equipment, includes: a memory having stored therein a computer program which, when executed by the processor, causes the processor to implement any of the methods described above.
The embodiment of the application discloses a computer readable storage medium, wherein a computer program is stored on the storage medium, and the computer program is characterized in that when being executed by a processor, the computer program realizes any one of the methods described above.
According to the audio data processing method, the audio data processing device, the terminal device and the readable storage medium, a plurality of sampling point data are obtained from audio data of audio to be played, an original decibel value of the audio to be played is calculated according to the sampling point data, and then the audio data are processed according to the original decibel value and a standard decibel value, so that the audio data after being processed are output through a power amplifier module according to standard volume corresponding to the standard decibel value, the difference of output volumes of different audio data is improved, and the playing effect of the audio to be played is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a diagram illustrating an exemplary embodiment of a method for processing audio data;
FIG. 2 is a flow diagram of a method for processing audio data in one embodiment;
FIG. 3 is a diagram of audio data in one embodiment;
FIG. 4 is a flowchart illustrating processing of audio data of an audio to be played based on decibel differences according to an embodiment;
FIG. 5 is a diagram of data interaction with respect to audio data in one embodiment;
FIG. 6 is a block diagram of the volume adjustment module in one embodiment;
FIG. 7 is a flow diagram of the processing of audio data by a volume adjustment module in one embodiment;
FIG. 8 is a schematic diagram of audio data in another embodiment;
FIG. 9 is a flowchart illustrating the calibration of the power amplifier module according to an embodiment;
FIG. 10 is a block diagram showing the structure of an audio data processing apparatus according to an embodiment;
fig. 11 is a block diagram of a terminal device in one embodiment.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It is to be noted that the terms "comprises" and "comprising" and any variations thereof in the examples and figures of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first amplifier may be referred to as a second amplifier, and similarly, a second amplifier may be referred to as a first amplifier, without departing from the scope of the present application. The first amplifier and the second amplifier are both amplifiers, but they are not the same amplifier.
Fig. 1 is a diagram illustrating an application scenario of a processing method of audio data according to an embodiment. As shown in fig. 1, the audio data processing method in the embodiment of the present application can be applied to a terminal device equipped with a multimedia playing system 20, where the multimedia playing system 20 is used for playing an audio source file 10, so that a user can hear a sound corresponding to the audio source file 10 through an output component 30, and the terminal device can include, but is not limited to, a smart phone, a smart wearable device, a tablet Computer, a notebook Computer, a vehicle-mounted terminal, a PC (Personal Computer), and the like.
In some embodiments, the multimedia playing System includes an SOC (System on Chip) 21, a DSP (Digital Signal processor) 22 and a PA- (power amplifier) 23; when playing a sound source file, the multimedia playing system analyzes audio data in the sound source file through the SOC21, performs equalizer and sound field effect processing on the audio data through the DSP22, converts the processed audio data into analog signals through the digital-to-analog converter, amplifies the analog signals through the PA23, and outputs the analog signals to the sound output part 30 (such as a speaker) of the terminal device, thereby playing sound of the sound source file; the volume of the sound played is generally determined by the volume level set by the multimedia playing system.
In the related art, when audio data of different sound source files are played, even if the same volume level is set, the played volume may have a difference, and the played volume depends on the audio data of the sound source file; the reason for this difference may be that the loudness of the sound part of different sound source files during recording is different or the sound receiving effect is different, or that different sound source files are edited, so that the sound volume of some sound source files during playing is larger than that before processing, so as to attract attention, and the sound source files are mostly used for advertisement or short video, or the audio formats of different sound source files are different, such as mp3 format and wma format.
The embodiment of the application discloses a method for processing audio data, when audio data of audio to be played flows into an SOC21, an SOC21 calculates an original decibel value of the audio to be played according to the audio data of the audio to be played, processes the audio data of the audio to be played, adjusts the original decibel value to a preset standard decibel value, outputs the processed audio data through a power amplifier module (including a DSP22 and a PA23), and makes the output volume be a standard volume corresponding to the standard decibel value. The audio data processing method can output the volume always to the standard volume when processing different audio files, realizes the output standardization of the audio files, enables users to hear the sound with the same volume under the same volume level when playing different audio files, and improves the playing effect.
As shown in fig. 2, in one embodiment, a method of processing audio data is provided, which may include the steps of:
In the embodiment of the application, the audio data of the audio to be played is a digital signal stream composed of a section of continuous point data, and one point data is a digital signal; illustratively, a 60 second segment of audio to be played with a two channel sampling rate of 48000Hz (hertz) contains 48000 x 2 x 60 points of data. The audio data of the audio to be played may correspond to different bit depths, for example, the bit depth is 16 bits, 32 bits, etc., but is not limited thereto, and for example, in the audio data with the bit depth of 16 bits, the point data is a digital signal stored with 16-bit binary digits.
Optionally, the obtaining of the data of the plurality of sampling points from the audio data of the audio to be played specifically may include: all the point data contained in the audio data of the audio to be played are used as sampling point data, namely a full sampling mode is adopted when a plurality of sampling point data are obtained, so that the original decibel value of the audio to be played can be calculated more accurately in the following process. It should be understood that the above-mentioned obtaining of multiple sampling point data may also adopt a partial sampling mode, for example, sampling all the point data included in the audio data based on a fixed interval to obtain multiple sampling point data, so as to improve the data processing efficiency; the manner of obtaining the plurality of sampling point data is not limited in the embodiments of the present application.
In some embodiments, the audio to be played may refer to a complete audio of an audio file to be played, that is, the obtaining of the data of the plurality of sampling points from the audio data of the audio to be played specifically may include: and acquiring a plurality of sampling point data from the complete audio data of the audio file to be played. At this time, the audio data processing method disclosed in the embodiment of the present application processes the complete audio of the audio file to be played, and then plays the processed complete audio.
In some embodiments, the audio to be played may also refer to audio data to be played in a preset time period in an audio file being currently played, that is, the obtaining of multiple sampling point data from the audio data of the audio to be played may include: in the currently played audio file, a plurality of sampling point data are obtained from audio data to be played in a preset time period.
Specifically, referring to fig. 3, as shown in fig. 3, fig. 3 is a schematic diagram of audio data in an embodiment, which shows audio data of an audio file currently being played, and the audio data to be played in a preset time period is selected from the audio data of the audio file currently being played as the audio data of the audio to be played, that is, a black portion shown in fig. 3. The duration of the preset time period can be preset according to the requirements of users. For example, the preset time period may include 100 milliseconds, 200 milliseconds, and the like, but is not limited thereto, the audio to be played is a part of audio to be played within 100 milliseconds in the currently played audio file, and the part of audio to be played within 100 milliseconds is processed, so as to subsequently output sound corresponding to the 100 millisecond part of audio, at this time, in the processing method of audio data disclosed in the embodiment of the present application, when all audio data in the audio file are processed, the audio data in each 100 milliseconds in the audio file are respectively processed, it should be understood that at this time, while outputting and playing processed audio data, the unprocessed audio data to be played may be processed, so as to implement dynamic processing on the currently played audio file, that is, processing while playing (front portion) is performed (rear portion).
In the embodiment of the present application, the original decibel value is used to represent the average decibel magnitude of the audio to be played. For example, the size of the digital signal corresponding to the sampling point data may represent the sound wave amplitude corresponding to the sampling point data, that is, if the audio data is not processed, the volume of the audio data output is determined according to the size of each digital signal included in the audio data; according to the data of the plurality of sampling points, the sound wave amplitude corresponding to the audio data can be determined, and then the amplitude is converted into a decibel value to obtain an original decibel value.
In some embodiments, the calculating an original decibel value of the audio to be played according to the multiple sampling point data may specifically be: and calculating energy values corresponding to the plurality of sampling point data, and calculating an original decibel value according to the energy values. The energy value refers to an effective value of a plurality of sampling point data, and can be used for representing the average volume corresponding to the audio data of the audio to be played. The terminal equipment can calculate the original decibel value through the energy value of the audio to be played.
Optionally, an RMS (root mean square) of the multiple sampling point data may be calculated, the RMS is used as an energy value, further, normalization processing may be performed on the multiple sampling point data based on a preset maximum value of the sampling data, the RMS is obtained through the sampling point data after the normalization processing, the RMS is converted to obtain an original decibel value of the audio to be played, the energy value corresponding to the multiple sampling point data may be calculated by referring to a formula (1), the original decibel value may be calculated by referring to a formula (2) according to the energy value, and details are as follows:
dB_val＝20*log10(RMS) equation (2);
wherein RMS refers to an energy value of the audio to be played; siFor the ith sample point data; n is the number of the obtained sampling point data; smaxThe maximum value of the sampling data is a preset fixed value and is related to the bit depth of the audio to be played, namely the maximum value of all possible values of the sampling data, namely SiAnd SmaxIs always less than or equal to 1, where the sample point data is divided by the maximum value of the sample data and is normalized; dB _ val is the original decibel value of the audio to be played.
In the embodiment of the present application, the standard decibel value may be a decibel value set according to an actual situation, or a decibel value obtained by calibrating or testing the audio playing system. The standard decibel value is associated with a standard output volume, i.e., the standard decibel corresponds to the standard output volume. And processing the audio data of the audio to be played by taking the standard decibel value as a reference so as to adjust the original decibel value to the standard decibel value, and subsequently outputting the processed audio data with standard output volume.
It should be understood that the standard decibel value may be set according to the user's needs, for example, the user may need an output volume with a high standard decibel value to wake up in the morning and may need an output volume with a low standard decibel value to relax in the evening; or the user sets different standard decibel values for different types of music.
In some embodiments, the processing the audio data of the audio to be played according to the original decibel value and the standard decibel value may specifically be: and calculating a decibel difference value between the original decibel value and the standard decibel value, and processing the audio data of the audio to be played based on the decibel difference value. The decibel difference represents the difference between the original decibel value and the standard decibel value, and may be specifically the difference obtained by subtracting the original decibel value from the standard decibel value.
Further, if the original decibel value is smaller than the standard decibel value, the decibel difference value is larger than 0, and then gain processing is carried out on the audio data based on the decibel difference value, and the digital signal corresponding to each point data in the audio data is increased; if the original decibel value is greater than the standard decibel value, the decibel difference value is less than 0, and at the moment, the audio data is subjected to attenuation processing based on the decibel difference value, so that digital signals corresponding to each point data in the audio data are reduced; if the original decibel value is equal to the standard decibel value, the decibel difference value is 0, at the moment, the audio data are not processed, and the audio data are processed in a targeted mode according to the size relation between the original decibel value and the standard decibel value, so that the processing efficiency is improved.
The power amplifier module is used for carrying out sound effect adjustment and power amplification on audio data and outputting the audio data after the power amplification, exemplarily, the power amplifier module can increase the sound effect for the audio data, amplify the output power of the audio data and convert the audio data (digital signals) into analog signals so as to enable sound output modules such as a loudspeaker and the like to play the audio data.
In the embodiment of the application, a plurality of sampling point data in audio data to be played are obtained, an original decibel value is calculated according to the plurality of sampling point data, the audio data are processed through the original decibel value and a preset standard decibel value, the original decibel value is adjusted to the standard decibel value, when the processed audio data are output through a power amplifier module, the output volume is a standard output volume corresponding to the standard decibel value, different audio data are processed, the output volume is a standard volume corresponding to the standard decibel value, a user can hear sounds with the same volume on the same volume level, and the playing effect of the audio data is improved.
As shown in fig. 4, in an embodiment, in the method for processing audio data, the step of processing the audio data of the audio to be played based on the decibel difference may include the following steps:
In the embodiment of the application, the terminal device may process the audio data of the audio to be played through the volume adjustment module, and the volume adjustment module is mainly used for performing gain processing or attenuation processing on the audio data. And determining the volume adjustment parameter of the volume adjustment module based on the decibel difference value, so that the volume adjustment module can process the audio data of the audio to be played according to the volume adjustment parameter to obtain the audio data with a standard decibel value.
For example, the volume adjustment module may perform gain processing or attenuation processing on the digital signal of each point data in the audio data, and it should be understood that the volume adjustment module may also perform gain processing or attenuation processing on the analog signal after the audio data is converted into the analog signal.
In the embodiment of the present application, referring to fig. 5, fig. 5 is a data interaction diagram related to audio data in an embodiment, as shown in fig. 5, the input of the volume adjusting module 510 is the audio data of the audio 500 to be played, and the output is processed audio data, the volume adjusting module 510 is connected to the power amplifier module 520, the output of the volume adjusting module 510 is the input of the power amplifier module 520, so as to output the audio data to the speaker 530 through the power amplifier module 520, so that the speaker 530 plays the sound with the standard volume corresponding to the standard decibel value.
In some embodiments, the volume adjustment parameter includes a variation coefficient, and the processing of the audio data of the audio to be played based on the decibel difference may specifically be: carrying out equal-ratio adjustment processing on the audio data by taking the change coefficient as a proportional base number, wherein when the original decibel value is smaller than the standard decibel value and the decibel difference value is larger than 0, the change coefficient is larger than 1, and carrying out equal-ratio amplification processing on the audio data by taking the change coefficient as the proportional base number; and when the original decibel value is greater than the standard decibel value and the decibel difference value is less than 0, the change coefficient is less than 1, and the audio data is subjected to equal-ratio reduction processing by taking the change coefficient as a proportional base number. For example, the purpose of processing the audio data is to adjust an original decibel value to a standard decibel value, that is, a decibel value calculated according to the processed audio data is the standard decibel value; the technical means for obtaining the change coefficient is derived according to the technical means for calculating the original decibel value, specifically, the calculation formula of the change coefficient can be obtained according to the calculation formula of the original decibel value through reasonable mathematical transformation, as shown in the following formula (3), as shown in the following formula (4), and as detailed in detail below:
ΔdB＝dB_st-dB_val＝20*log10(k*RMS)-20*log10(RMS) formula (3),
wherein dB _ st is a standard decibel value; dB _ val is the original decibel value of the audio to be played; Δ dB is the decibel difference; RMS is the energy value of the audio to be played; k is a coefficient of variation. In the embodiment, the audio data is subjected to the geometric magnification or reduction processing according to the change coefficient, so that the change characteristics of the audio data can be kept as much as possible to reduce the influence on the melody corresponding to the audio data.
In one embodiment, as shown in fig. 6, fig. 6 is a block diagram of a volume adjustment module in another embodiment, where the volume adjustment module 510 includes a first amplifier 511 and a second amplifier 512; if the original decibel value is smaller than the standard decibel value, determining a gain parameter of the first amplifier according to the decibel difference value; and if the original decibel value is greater than the standard decibel value, determining the attenuation parameter of the second amplifier according to the decibel difference value. If the original decibel value is smaller than the standard decibel value, the audio data of the audio 500 to be played is input to the first amplifier 511, so that the first amplifier 511 amplifies the audio data based on the gain parameter; if the original db value is greater than the standard db value, the audio data of the audio 500 to be played is input to the second amplifier 512, so that the second amplifier 512 performs attenuation processing on the audio data based on the attenuation parameter.
For example, in the volume adjustment module 510, the first amplifier 511 and the second amplifier 512 are connected in series, that is, in fig. 6 of the volume adjustment module, in the volume adjustment module 510, the input data first passes through the first amplifier 511, then passes through the second amplifier 512, and then is output. In the embodiment of the present application, the audio data is input to the volume adjustment module 510, and passes through the first amplifier 511 and the second amplifier 512 before being output by the volume adjustment module 510, when the original decibel value is smaller than the standard decibel value, only the first amplifier 511 substantially changes the audio data, but the second amplifier 512 does not substantially change the audio data; when the original db value is greater than the standard db value, the first amplifier 511 does not substantially change the audio data, and the second amplifier 512 substantially changes the audio data.
Of course, in other embodiments, in the volume adjustment module 510, the first amplifier 511 and the second amplifier 512 may be connected in parallel, and a determiner may be present in front of the two for comparing the original db value with the standard db value, and if the original db value is smaller than the standard db value, the audio data is directed to the first amplifier 511; if the original decibel value is greater than the standard decibel value, the audio data is directed to the second amplifier 512; if the original decibel value is equal to the standard decibel value, the audio data is directly directed to the output of the volume adjustment module 510.
It should be understood that when the original decibel value is equal to the standard decibel value, that is, the decibel difference value is equal to 0, the audio data is not amplified, and the audio data is not attenuated; the volume adjustment module may also include other components, such as filters, to meet other needs of the user for the audio to be played.
It should be understood that in some embodiments, different processing manners may be adopted for the audio data, for example, when the audio data is processed, the digital signals of all the point data in the audio data are increased or decreased in a uniform amplitude according to a preset arithmetic progression, and the corresponding decibel value after each increase or decrease is monitored until the decibel value is closest to the standard decibel value, and the audio data at this time is output to the power amplifier module as the processed audio data, so as to retain the overall characteristics of the audio data.
In some embodiments, there are other processing manners for the audio data, for example, the audio data is divided into a plurality of segments of sub-data, and the digital signal of each segment of sub-data is adjusted until the decibel value corresponding to each segment of sub-data is the standard decibel value, so as to reduce the granularity of adjustment and improve the processing accuracy of the audio data.
In some embodiments, the processing manner of the audio data further includes: when the audio data is processed, the adjustment weight corresponding to each point data is determined based on the data interval to which each point data belongs, and the digital signal of each point data is increased or decreased according to the adjustment weight corresponding to each point data, so that the processed audio data is smoother. Illustratively, according to the size of the digital signal from large to small, 3 data intervals may be set, where the digital signal in the first data interval is the largest, the digital signal in the third data interval is the smallest, a larger adjustment weight is allocated to the first data interval and the third data interval, and a smaller adjustment weight is allocated to the second data interval, so that the adjustment of the digital signal of the audio data is smoothed, and at the same time, the adjusted original decibel value is guaranteed to be the standard decibel value.
It should be noted that, in the embodiments of the present application, a specific audio data processing manner is not limited, and only the decibel value of the processed audio data is defined as a standard decibel value.
As shown in fig. 7, fig. 7 is a flowchart illustrating an embodiment of processing audio data by a volume adjustment module, and in the embodiment of the present application, a process of processing audio data by the volume adjustment module includes the following steps:
In some embodiments, the input audio data may be complete audio data of one audio file, partial audio data of one audio file, or a combination of audio data of multiple audio files. Generally, the input audio data is a piece of audio data having continuity in the playback timing.
In some embodiments, it should be noted that step 708 is executed after step 704 is executed, so as to ensure the continuity of the audio data output.
In some embodiments, the terminal device may determine a volume adjustment parameter of the volume adjustment module according to a decibel difference between an original decibel value and a standard decibel value of the audio data, and adjust the parameter of the volume adjustment module multiple times according to a preset time period, so as to gradually adjust the parameter of the volume adjustment module to the volume adjustment parameter.
Optionally, the volume adjustment module sets a timer for timing, the timer may be configured to record a duration corresponding to a parameter of the volume adjustment module each time, after the parameter of the volume adjustment module is adjusted each time, whether the recorded duration reaches a preset time period may be determined according to the timer, if the recorded duration reaches the preset time period, whether a current parameter of the volume adjustment module is the volume adjustment parameter may be further determined, and if the current parameter of the volume adjustment module is not the volume adjustment parameter, the parameter of the volume adjustment module may be continuously adjusted, so that the current parameter of the volume adjustment module is closer to the volume adjustment parameter.
In some embodiments, the adjustment range of the volume adjustment module in each parameter adjustment may be set, where the adjustment range may be a parameter difference value of the audio adjustment module before and after the adjustment, or may be a parameter ratio of the audio adjustment module before and after the adjustment.
At step 708, the audio data is processed by the volume adjustment module.
In some embodiments, processing the audio data through the volume adjustment module may include processing the audio data through a current parameter of the volume module, that is, during the processing of the audio data, the current parameter of the volume module may be adjusted, so as to output the processed audio data corresponding to different parameters, specifically referring to fig. 8, fig. 8 is a schematic diagram of the audio data in another embodiment, for example, during a first time period, the current parameter of the volume adjustment module is a first parameter, and then the audio data processed during the first time period is processed according to the first parameter; and in a second time period, the current parameter of the volume adjustment module is the second parameter, the audio data processed in the second time period is processed according to the second parameter, and so on until the current parameter of the volume adjustment module is the volume adjustment parameter, the audio data processed in the later time period are processed according to the volume adjustment parameter, and the decibel value of the processed audio data is the standard decibel value. It should be noted that the current parameter of the volume module is gradually adjusted to the volume adjustment parameter, that is, a certain gradual change rule is satisfied from the first parameter, the second parameter to the volume adjustment parameter, so that the processed audio data shows a gradually changing effect during output, so that the user is gradually accustomed to the change of the audio data, and the user experience is improved.
It should be understood that processing the audio data according to the current parameter of the volume module is a continuous process, during which the current parameter of the volume adjusting module may be adjusted to the volume adjusting parameter multiple times, that is, while the current parameter of the volume adjusting module is gradually adjusted to the volume adjusting parameter, the step of processing the audio data according to the current parameter of the volume module is still performed.
And step 710, outputting the processed audio data.
In some embodiments, the processed audio data may refer to fig. 8, and specifically refer to the related description above, which is not repeated herein. It should be noted that the processed audio data is output to the power amplifier module, so that the power amplifier module further processes the processed audio data, and the subsequent sound output component can play the sound corresponding to the audio data.
In the embodiment of the application, the parameters of the audio adjusting module are gradually adjusted, so that the volume of the processed audio data is gradually changed when the audio data is output, and the condition that the output volume of the audio data is suddenly increased or suddenly reduced to cause uncomfortable and uncomfortable feelings to a user is avoided.
As shown in fig. 9, in an embodiment, before step 240, the method for processing audio data further includes a step of calibrating the power amplifier module, which is described in detail as follows:
In the embodiment of the present application, the power amplifier module needs to be calibrated to fix the parameters of the power amplifier module, so that the power amplifier module plays audio data with the same decibel at the same volume playing level, and will output sound with the same volume. Specifically, calibration audio data of a preset decibel value can be acquired, the calibration audio data of the preset decibel value is input into the power amplifier module, a volume playing level corresponding to the power module can be set, the calibration audio data is output after being subjected to power amplification and other processing through the power amplifier module, parameters of the power amplifier module are adjusted according to the output volume until the output volume of the power module is the preset volume corresponding to the set volume playing level, and then calibration of the power amplifier module is completed at this moment.
In some embodiments, the power amplifier module may include an ADSP (Analog Digital single Processor) and a PA. When the power amplifier module is calibrated, the output volume of the ADSP at a certain fixed volume playing level (for example, 15 levels) may be set to be xdB in advance, the output of the PA is ydB, and the PA may be at the maximum power at this time, and may continuously play audio data without distortion, where xdB is the preset decibel value, and ydB is the preset volume.
Illustratively, the output volume difference between each adjacent volume playback level is a fixed value with the input decibel value unchanged. When the calibrated audio data is output through the calibrated power amplification module, a volume playing level is reduced at a preset volume playing level, the output volume at the moment is recorded, and the calibration relation between the volume playing level of the power amplification module and the output volume can be determined according to the difference between the output volume at the moment and the preset volume.
Illustratively, at a certain volume playback level, the input decibel value is proportional to the output volume. The calibrated power amplifier module outputs the comparison audio data, a certain difference value exists between the decibel values of the comparison audio data and the calibrated audio data, the output volume at the moment is recorded, and the calibration relation between the input decibel value and the output volume of the power amplifier module can be determined according to the difference value between the output volume at the moment and the preset volume and the difference value between the decibel values of the comparison audio data and the calibrated audio data.
Through the calibration relation between the volume playing level and the output volume of the power amplification module and the calibration relation between the input decibel value and the output volume, the calibration relation of the input decibel value, the volume playing level and the output volume of the power amplification module can be determined.
In this embodiment of the present application, in the above processing method of audio data, step 240 further includes the following steps:
and 904, determining standard output volume corresponding to the standard decibel value according to the calibration relation and the current volume playing level of the power amplifier module, and outputting the processed audio data according to the standard output volume through the power amplifier module.
In this embodiment, the power amplifier module is calibrated in step 902, so that the obtained calibration relationship regarding the input decibel value, the volume playing level, and the output volume of the power amplifier module is universal when the power amplifier module outputs the processed audio data. In order to ensure that the output volume when the processed audio data is output by the power amplifier module is the standard output volume corresponding to the standard decibel value, firstly, the standard output volume corresponding to the standard decibel value is determined, specifically, the standard output volume corresponding to the standard decibel value can be determined by knowing the standard decibel value and the current volume playing level of the power amplifier module according to the calibration relation, and then the processed audio data is output by the power amplifier module according to the standard output volume.
In some embodiments, the standard decibel value may be a decibel value of the calibrated audio data, so that when the power amplifier module outputs the processed audio data, the audio data is output more accurately according to the standard output volume.
It should be understood that the standard decibel value may also be preset, for example, if the user wants to hear 60 decibels of music at a volume playing level of 10, the standard decibel value may be set according to the above calibration relationship regarding the input decibel value, the volume playing level, and the output volume of the power amplifier module.
In the embodiment of the application, before the processed audio data is output by the power amplifier module, the power amplifier module is calibrated by calibrating the audio data so as to ensure that the output volumes of the power amplifier module are consistent under the condition that decibel values of the audio data input by the power amplifier module are consistent; furthermore, the calibration relation of the input decibel value, the volume playing level and the output volume of the power amplifier module is determined through calibration, so that the standard output volume corresponding to the standard decibel value at the current volume playing level is determined, and the output volume of the power amplifier module is more accurate.
As shown in fig. 10, in one embodiment, a processing device 1000 of audio data is provided. The apparatus 1000 may include: the device comprises a sampling module 1010, a decibel value calculating module 1020, an audio data processing module 1030 and a power amplifier module 1040.
The sampling module 1010 is configured to obtain multiple sampling point data from audio data of an audio to be played;
a decibel value calculation module 1020, configured to calculate an original decibel value of the audio to be played according to the multiple sampling point data;
an audio data processing module 1030, configured to process the audio data of the audio to be played according to the original decibel value and a preset standard decibel value, so as to adjust the original decibel value of the audio to be played to the standard decibel value;
the power amplifier module 1040 is used for outputting the processed audio data through the power amplifier module; and the output volume of the processed audio data during output is the standard output volume corresponding to the standard decibel value.
In one embodiment, the decibel value calculation module 1020 may further include an energy value calculation unit and an energy value decibel value conversion unit.
The energy value calculating unit is used for calculating and obtaining energy values corresponding to the plurality of sampling point data;
and the energy value decibel value conversion unit is used for calculating the original decibel value according to the energy value.
In an embodiment, the audio data processing module 1030 may further include a decibel difference calculation module and a volume adjustment module.
The decibel difference value calculating unit is used for calculating the decibel difference value between the original decibel value and the standard decibel value;
and the volume adjusting unit is used for processing the audio data of the audio to be played based on the decibel difference.
In an embodiment, the volume adjustment unit may further include a volume adjustment parameter determination subunit, a processing subunit, and an uploading subunit.
A volume adjustment parameter determination subunit, configured to determine a volume adjustment parameter based on the decibel difference;
a processing subunit, configured to process the audio data based on the volume adjustment parameter;
and the uploading subunit is used for outputting the processed audio data to the power amplification module.
In an embodiment, the volume adjusting unit may further include a first amplifier and a second amplifier. The volume adjustment parameter determining subunit is further configured to determine, if the original decibel value is smaller than the standard decibel value, a gain parameter of the first amplifier according to the decibel difference value; and if the original decibel value is greater than the standard decibel value, determining the attenuation parameter of the second amplifier according to the decibel difference value.
A first amplifier for amplifying the audio number based on the gain parameter if the original decibel value is less than the standard decibel value
And the second amplifier is used for carrying out attenuation processing on the audio data based on the attenuation parameter if the original decibel value is greater than the standard decibel value.
In one embodiment, the audio data processing module 1030 may further include a volume adjustment parameter tone-by-tone unit.
And the volume adjusting parameter gradually-adjusting unit is used for adjusting the parameters of the volume adjusting unit for multiple times according to a preset time period in the process of processing the audio data by the volume adjusting unit so as to gradually adjust the parameters of the volume adjusting unit to the volume adjusting parameters, so that the volume adjusting unit processes the audio data based on the adjusted parameters.
In an embodiment, the sampling module 1010 may be further configured to obtain data of a plurality of sampling points from the complete audio data of the audio file to be played; or the method can also be used for acquiring a plurality of sampling point data from the audio data to be played in the preset time period in the currently played audio file.
In one embodiment, the apparatus may further include a calibration module and a standard output volume determination module.
The calibration module is used for calibrating the power amplification module through calibration audio data to obtain a calibration relation of an input decibel value, a volume playing level and an output volume of the power amplification module;
the standard output volume determining module is used for determining standard output volume corresponding to the standard decibel value according to the calibration relation and the current volume playing level of the power amplifier module so as to enable the power amplifier module to output the processed audio data according to the standard output volume.
In one embodiment, the apparatus may further include a standard decibel value setting module configured to set a standard decibel value to a decibel value of the calibrated audio data.
Fig. 11 is a block diagram of a terminal device in one embodiment. As shown in fig. 11, terminal device 1100 may include one or more of the following components: a processor 1110, a memory 1120 coupled to the processor 1110, wherein the memory 1120 may store one or more computer programs that may be configured to implement the methods described in the embodiments above when executed by the one or more processors 1110.
The Memory 1120 may include a Random Access Memory (RAM) or a Read-Only Memory (ROM). The memory 1120 may be used to store instructions, programs, code, sets of codes, or sets of instructions. The memory 1120 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for implementing at least one function (such as a touch function, a sound playing function, an image playing function, etc.), instructions for implementing the various method embodiments described above, and the like. The storage data area may also store data created by the terminal device 1100 in use, and the like.
It is understood that the terminal device 1100 may include more or less structural elements than those shown in the above structural block diagrams, for example, a power module, a physical button, a WiFi (Wireless Fidelity) module, a speaker, a bluetooth module, a sensor, etc., and is not limited thereto.
The embodiment of the application discloses a computer readable storage medium, which stores a computer program, wherein the computer program realizes the method described in the above embodiment when being executed by a processor.
Embodiments of the present application disclose a computer program product comprising a non-transitory computer readable storage medium storing a computer program, and the computer program, when executed by a processor, implements the method as described in the embodiments above.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a non-volatile computer-readable storage medium, and can include the processes of the embodiments of the methods described above when the program is executed. The storage medium may be a magnetic disk, an optical disk, a ROM, etc.
Any reference to memory, storage, database, or other medium as used herein may include non-volatile and/or volatile memory. Suitable non-volatile memory can include ROM, Programmable ROM (PROM), Erasable PROM (EPROM), Electrically Erasable PROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, RAM can take many forms, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), Rambus Direct RAM (RDRAM), and Direct Rambus DRAM (DRDRAM).
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Those skilled in the art should also appreciate that the embodiments described in this specification are all alternative embodiments and that the acts and modules involved are not necessarily required for this application.
In various embodiments of the present application, it should be understood that the size of the serial number of each process described above does not mean that the execution sequence is necessarily sequential, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated units, if implemented as software functional units and sold or used as a stand-alone product, may be stored in a computer accessible memory. Based on such understanding, the technical solution of the present application, which is a part of or contributes to the prior art in essence, or all or part of the technical solution, may be embodied in the form of a software product, stored in a memory, including several requests for causing a computer device (which may be a personal computer, a server, a network device, or the like, and may specifically be a processor in the computer device) to execute part or all of the steps of the above-described method of the embodiments of the present application.
The interface display method, the interface display apparatus, the terminal device and the computer-readable storage medium disclosed in the embodiments of the present application are described in detail above, and specific examples are applied herein to illustrate the principles and implementations of the present application, and the descriptions of the above embodiments are only used to help understand the method and the core ideas of the present application. Meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (12)
1. A method of processing audio data, the method comprising:
acquiring a plurality of sampling point data from audio data of audio to be played;
calculating an original decibel value of the audio to be played according to the plurality of sampling point data;
processing the audio data of the audio to be played according to the original decibel value and a preset standard decibel value so as to adjust the original decibel value of the audio to be played to the standard decibel value;
outputting the processed audio data through a power amplifier module; and the output volume of the processed audio data during output is the standard output volume corresponding to the standard decibel value.
2. The method of claim 1, wherein said calculating an original decibel value for said audio to be played from said plurality of sample point data comprises:
and calculating energy values corresponding to the plurality of sampling point data, and calculating the original decibel value according to the energy values.
3. The method according to claim 1, wherein the processing the audio data of the audio to be played according to the original decibel value and the standard decibel value comprises:
calculating a decibel difference value between the original decibel value and the standard decibel value;
and processing the audio data of the audio to be played based on the decibel difference value.
4. The method according to claim 3, wherein the processing the audio data of the audio to be played based on the decibel difference comprises:
determining a volume adjustment parameter of a volume adjustment module based on the decibel difference;
and inputting the audio data of the audio to be played into the volume adjustment module so that the volume adjustment module processes the audio data based on the volume adjustment parameter and outputs the processed audio data to the power amplification module.
5. The method of claim 4, wherein the volume adjustment module comprises a first amplifier and a second amplifier; determining a volume adjustment parameter of a volume adjustment module based on the decibel difference comprises:
if the original decibel value is smaller than the standard decibel value, determining a gain parameter of the first amplifier according to the decibel difference value;
if the original decibel value is larger than the standard decibel value, determining the attenuation parameter of the second amplifier according to the decibel difference value;
the inputting the audio data of the audio to be played into the volume adjustment module so that the volume adjustment module processes the audio data based on the volume adjustment parameter includes:
if the original decibel value is smaller than the standard decibel value, inputting the audio data of the audio to be played to the first amplifier so that the first amplifier amplifies the audio data based on the gain parameter;
and if the original decibel value is larger than the standard decibel value, inputting the audio data of the audio to be played to the second amplifier so that the second amplifier carries out attenuation processing on the audio data based on the attenuation parameter.
6. The method of claim 4, wherein the volume adjustment module processes the audio data based on the volume adjustment parameter, comprising:
and in the process of processing the audio data by the volume adjustment module, adjusting the parameters of the volume adjustment module for multiple times according to a preset time period so as to gradually adjust the parameters of the volume adjustment module to the volume adjustment parameters, so that the volume adjustment module processes the audio data based on the adjusted parameters.
7. The method of claim 1, wherein the obtaining the sample data from the audio data of the audio to be played comprises:
acquiring a plurality of sampling point data from complete audio data of an audio file to be played; or
In the currently played audio file, a plurality of sampling point data are obtained from audio data to be played in a preset time period.
8. The method according to any one of claims 1-7, wherein before outputting the processed audio data through the power amplifier module, the method further comprises:
calibrating the power amplification module through calibration audio data to obtain a calibration relation of an input decibel value, a volume playing level and an output volume of the power amplification module;
the audio data after processing is output through the power amplifier module, including:
and determining standard output volume corresponding to the standard decibel value according to the calibration relation and the current volume playing level of the power amplifier module, and outputting the processed audio data according to the standard output volume through the power amplifier module.
9. The method of claim 8, wherein the standard decibel value is a decibel value of the calibration audio data.
10. An apparatus for processing audio data, the apparatus comprising:
the sampling module is used for acquiring a plurality of sampling point data from the audio data of the audio to be played;
the decibel value calculation module is used for calculating the original decibel value of the audio to be played according to the plurality of sampling point data;
the audio data processing module is used for processing the audio data of the audio to be played according to the original decibel value and a preset standard decibel value so as to adjust the original decibel value of the audio to be played to the standard decibel value;
the power amplifier module is used for outputting the processed audio data; and the output volume of the processed audio data during output is the standard output volume corresponding to the standard decibel value.
11. A terminal device, comprising: a memory having stored therein a computer program which, when executed by the processor, causes the processor to carry out the method of any one of claims 1 to 9.
12. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method according to any one of claims 1 to 9.
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