CN212909995U - Audio gain adjusting device of sound card - Google Patents
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- CN212909995U CN212909995U CN202022114985.4U CN202022114985U CN212909995U CN 212909995 U CN212909995 U CN 212909995U CN 202022114985 U CN202022114985 U CN 202022114985U CN 212909995 U CN212909995 U CN 212909995U
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Abstract
The utility model discloses an audio frequency gain adjustment device of sound card, include: a calibration audio source for outputting a calibration audio; the audio transmission equipment is used for converting the calibration audio into a plurality of analog audio which is input into a plurality of audio channels; and the display device is used for displaying the audio energy value of each audio channel so that a user can adjust the gain of each audio channel according to the audio energy value until the gains of the audio channels are consistent. The device can effectively improve the efficiency and the precision of the gain consistency adjustment of the audio channel, thereby improving the deployment efficiency of a system where the device is located and the accuracy of sound conversion.
Description
Technical Field
The utility model belongs to the technical field of the speech signal processing technique and specifically relates to an audio gain adjusting device of sound card is related to.
Background
A Sound Card (Sound Card), also called audio Card, is the most basic component in a computer multimedia system, and is a hardware for realizing the interconversion between Sound waves and digital signals. The basic function of the sound card is to convert original sound signals from a microphone, a magnetic tape, an optical disk, etc., and output the converted signals to sound equipment such as an earphone, a speaker, a loudspeaker, a recorder, etc., or to emit sounds of a synthesized musical instrument through a Musical Instrument Digital Interface (MIDI).
Currently, sound cards may include either single channel sound cards or multi-channel sound cards, i.e., one sound card having a single audio channel or multiple audio channels. When the sound card is a multichannel sound card, it is sometimes necessary to perform gain consistency adjustment on the sound card when the sound card is used. In the related art, the gain adjustment knob is adjusted repeatedly to reach a desired gain value mainly according to the scale of the gain adjustment knob. However, the time cost of the method is large, and the regulation efficiency is low, so that the deployment efficiency of related systems such as an intelligent conference system is influenced.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, an object of the present invention is to provide an audio gain adjustment device for a sound card, which provides calibration audio for a plurality of audio channels through an audio transmission device in the device, and ensures that all audio channels have the same calibration audio, and simultaneously in the process of gain adjustment, the audio energy value of each audio channel is quantized and displayed through a display device in the device, so that the user can adjust the gain uniformity of all audio channels according to the quantized audio energy value, and the adjustment efficiency is high and the adjustment precision is high, thereby effectively improving the deployment efficiency of the system where the audio card is located and the accuracy of sound conversion.
In order to achieve the above object, an embodiment of the present invention provides an audio gain adjustment device for a sound card, wherein the sound card includes a plurality of audio channels, and each audio channel in the plurality of audio channels has an independently adjustable gain, and the device includes: a calibration audio source for outputting a calibration audio; the audio transmission equipment is used for converting the calibration audio into a plurality of analog audio which is input into a plurality of audio channels; and the display device is used for displaying the audio energy value of each audio channel so that a user can adjust the gain of each audio channel according to the audio energy value until the gains of the audio channels are consistent.
According to the utility model discloses audio gain adjusting device of sound card, the calibration audio conversion who will calibrate sound source output through audio transmission equipment is a plurality of analog audio, and input to the audio frequency passageway that corresponds, it has the same calibration audio to have guaranteed that all audio frequency passageways have, and simultaneously, audio energy value to every audio frequency passageway through display device quantifies and shows, the user can realize the gain uniformity to all audio frequency passageways according to the audio energy value of quantization like this and adjust, it is efficient and adjust the precision height to adjust efficiency, thereby can effectively improve the degree of accuracy of the deployment efficiency and the sound conversion of its place system.
In some examples, the audio delivery device includes an input coupled to the output of the calibration audio source and a plurality of outputs coupled to the plurality of audio channels.
In some examples, the audio transmission device is an audio cable.
In some examples, the output of the calibration audio source is a 3.5mm audio output.
In some examples, the frequency and amplitude of the calibration audio source are adjustable.
In some examples, the sound card further comprises: the input end of the analog-to-digital converter is correspondingly connected with the plurality of audio channels and is used for converting the analog audio output by each audio channel to obtain corresponding digital audio signals; and the processor is connected with the output end of the analog-to-digital converter and used for converting the digital audio signal into an audio energy value and sending the audio energy value to the display equipment through the communication interface.
In some examples, the communication interface includes a wired communication interface or a wireless communication interface.
In some examples, the volume of the calibration audio corresponds to a reference gain.
In some examples, the audio gain adjustment apparatus further comprises: and the output end of the audio receiver is connected with at least one audio channel in the plurality of audio channels and used for receiving the audio information of the user and inputting the audio information into the corresponding audio channel, wherein the display equipment is also used for displaying the transcription result of the audio information so that the user can obtain the reference gain according to the transcription result.
In some examples, the audio receiver is a microphone.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a block diagram of an audio gain adjustment apparatus for a sound card according to a first embodiment of the present invention;
fig. 2 is a block diagram illustrating an audio gain adjustment apparatus for a sound card according to a second embodiment of the present invention;
fig. 3-5 are process diagrams of gain uniformity adjustment for multiple audio channels of a sound card according to one specific example of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
The following describes an audio gain adjustment device for a sound card according to an embodiment of the present invention with reference to the drawings.
In this application, the sound card may include a plurality of audio channels, each of the plurality of audio channels having an independently adjustable gain. For example, the sound card may be a multi-channel sound card with multiple audio channels integrated therein, or a multi-channel sound card with multiple audio channels obtained by cascading multiple single-channel sound cards/multi-channel sound cards, where the multiple audio channels are independent from each other and have independently adjustable gains, for example, each audio channel is provided with a gain adjustment knob, and the gain of each audio channel is adjusted by the gain adjustment knob.
Fig. 1 is a block diagram of an audio gain adjustment apparatus for a sound card according to an embodiment of the present invention. Referring to fig. 1, the audio gain adjusting apparatus 100 of the sound card may include: the audio source 101, the audio transmission device 102 and the display device 103 are calibrated.
Wherein, the calibration audio source 101 is used for outputting a calibration audio; the audio transmission device 102 is configured to convert the calibration audio into a plurality of analog audio inputs into a plurality of audio channels; the display device 103 is configured to display the audio energy value of each audio channel, so that the user can adjust the gain of each audio channel according to the audio energy value until the gains of the audio channels are consistent.
Specifically, the calibration audio source 101 has calibration audio embedded therein, and the calibration audio may be in WAV format, MP3 format, or the like, which is not limited herein. In practical applications, the calibration audio source 101 may be a playback device such as MP3, MP4, or a mobile phone with an audio playback function, and the calibration audio is provided through the playback device for gain consistency adjustment. For example, the desired calibration audio may be stored in the calibration audio source 101 in advance, and directly output when the gain consistency is adjusted; alternatively, the calibration audio source 101 is set to be adjustable in frequency and amplitude, and the calibration audio is adjusted by adjusting at least one of the frequency and amplitude thereof to output the desired calibration audio. More specifically, when the calibration audio source 101 is the MP3, the volume of the calibration audio can be adjusted by adjusting the sound adjustment button of the MP3, that is, the amplitude of the calibration audio source is adjusted so that it outputs the calibration audio corresponding to the reference gain; or, the speed of the calibration audio is adjusted by adjusting the speed adjusting key of the MP3, that is, the frequency of the calibration audio source is adjusted, so that the calibration audio corresponding to the reference gain is output; alternatively, the amplitude and frequency of the calibration audio source are adjusted by the sound adjustment key and the speed adjustment key at the same time so that the calibration audio corresponding to the reference gain is output. The reference gain is a gain that the sound card can satisfy the transcription requirement, that is, a gain when the voice recognition rate of the sound card is greater than a certain value.
The audio delivery device 102 may include an input and a plurality of outputs, wherein the input of the audio delivery device 102 is matched to the output of the calibration audio source 101 to receive the calibration audio output by the calibration audio source 101. For example, when the output of the calibration audio source 101 is a 3.5mm audio output, the input of the audio transmission device 102 may be a 3.5mm audio input, and more specifically, when the calibration audio source 101 is MP3, the input of the audio transmission device 102 may be a 3.5mm headphone jack. A plurality of output ends of the audio transmission device 102 are matched with and correspondingly connected to a plurality of audio channels of the sound card, so as to convert the calibration audio output by the calibration audio source 101 into a plurality of analog audio with equal amplitude, and input the analog audio into the corresponding audio channels. For example, when the ports of the multiple audio channels of the sound card are canon female ports, the multiple output ports of the audio transmission device 102 are canon male ports. More specifically, the audio transmission device 102 may be a single-in multiple-out audio cable, the input of which matches the output of the calibration audio source 101, such as a 3.5mm headphone jack, and the output of which matches multiple audio channels of a sound card, such as a canon's male port. In addition, the number of the output ends of the audio transmission device 102 needs to be greater than or equal to the number of the audio channels that need to be adjusted for gain consistency, and in practical applications, the number of the output ends of the audio transmission device 102 is as large as possible under an allowable condition to meet different adjustment requirements.
The display device 103 is connected to the sound card, and a debugging software or a debugging tool, etc. related to the gain consistency adjustment is built in the display device, which is mainly used for performing real-time quantization display on the audio energy value of each audio channel in the gain consistency adjustment process, so that a user can adjust the gain of each audio channel according to the displayed audio energy value until the gains of a plurality of audio channels are consistent, for example, the user can adjust the gain of each audio channel by adjusting a gain adjustment knob on each audio channel according to the displayed audio energy value until the gain of each audio channel is consistent with a reference gain. The display device 103 may be a mobile phone, a computer, or other devices with a display interface, and is not limited herein.
When performing gain consistency adjustment, the calibration sound source 101, the audio transmission device 102, the display device 103, and the sound card may be connected as shown in fig. 1. Then, the calibration audio source 101 is controlled to output calibration audio, the calibration audio is converted into a plurality of analog audio with equal amplitude through the audio transmission device 102 and is input into a plurality of audio channels of the sound card, each analog audio passes through the audio channel with independently adjustable gain, after being amplified according to the gain set by the gain adjustment knob, relevant devices built in the sound card process the audio, and output corresponding audio energy values and transmit the audio energy values to the display device 103, and the display device 103 dynamically displays the audio energy values of each audio channel. Then, the user may adjust the gain of each audio channel according to the displayed audio energy value until the gains of the multiple audio channels are consistent, for example, the gain of one of the audio channels may be adjusted first until the audio energy value corresponding to the audio channel is consistent with the audio energy value corresponding to the reference gain, and then the gains of the remaining audio channels may be adjusted in sequence until the audio energy values of all the audio channels are the same. So far, the gain consistency adjustment of a plurality of audio channels of the sound card is completed.
In this embodiment, calibration audio is provided for a plurality of audio channels through audio transmission equipment in the apparatus, it is ensured that all audio channels have the same calibration audio, and meanwhile, in the process of gain adjustment, the audio energy value of each audio channel is quantitatively displayed through display equipment in the apparatus, so that a user can adjust the gain consistency of all audio channels according to the quantized audio energy value, the adjustment efficiency is high, the adjustment precision is high, and the deployment efficiency of the system where the user is located and the accuracy of sound conversion can be effectively improved.
In some embodiments of the present invention, the sound card may further include an analog-to-digital converter and a processor (not shown in the figures), wherein an input end of the analog-to-digital converter is correspondingly connected to the plurality of audio channels, so as to convert the analog audio output by each audio channel to obtain a corresponding digital audio signal; the processor is connected to the output of the analog-to-digital converter for converting the digital audio signal into an audio energy value and sending the audio energy value to the display device 103 through the communication interface. The communication interface may include a wired communication interface or a wireless communication interface.
Specifically, after the calibration audio output from the calibration audio source 101 is converted into a plurality of analog audio with equal amplitude by the audio transmission device 102, and is input into a plurality of audio channels of the sound card, each audio channel performs gain amplification on the corresponding analog audio according to the setting of the gain adjustment knob, the amplified analog audio enters the analog-to-digital converter of the sound card to form a digitized audio signal, i.e., a digital audio signal, and enters the processor of the sound card, e.g., a DSP, the processor quantizes the digital audio signal into an audio energy value in real time, and the audio energy value is transmitted to the display device 103 through a communication interface, e.g., an RJ45 wired network interface, for display. Then, the user adjusts the gain of each audio channel through the gain adjusting knob according to the audio energy value displayed in real time until the gains of the audio channels are consistent.
In some embodiments of the present invention, referring to fig. 2, the audio gain adjusting device may further include: the output end of the audio receiver 104 is connected with at least one audio channel in the plurality of audio channels, and is used for receiving the audio information of the user and inputting the audio information into the corresponding audio channel; the display device 103 is also configured to display the transcription result of the audio information so that the user obtains a reference gain according to the transcription result.
Specifically, the audio receiver 104 is mainly used for receiving audio information and outputting the audio information to at least one audio channel of the sound card, so as to obtain the reference gain. For example, the audio receiver 104 may be a device such as a microphone having voice receiving and outputting functions, and the output end of the audio receiver is matched with the port of the audio channel of the sound card, for example, when the port of the audio channel is a cannon female port, the output end of the audio receiver 104 is a cannon male port.
In reference gain acquisition, the audio receiver 104, the sound card, and the display device 103 may be connected as shown in fig. 2. Then, the user makes a conventional utterance at a conventional distance and angle, at this time, the audio receiver 104 receives and inputs the audio information of the user into a corresponding audio channel, the audio information passes through the audio channel with independently adjustable gain, after being amplified according to the gain set by the gain adjusting knob, the audio information is processed by related devices built in the sound card, and then a corresponding audio energy value and a transcription result are output and transmitted to the display device 103, and the display device 103 dynamically displays the audio energy value and the transcription result of the audio channel. For example, the amplified audio information enters an analog-to-digital converter of the sound card to form a digital audio signal, and enters a processor of the sound card, and the digital audio signal is quantized into an audio energy value in real time by the processor, and is simultaneously converted into characters, and is transmitted to the display device 103 through the communication interface for display. And then, the user adjusts the gain of the audio channel according to the transcription result displayed in real time until the transcription result meets the transcription requirement, namely when the voice recognition rate is greater than a certain value, the audio energy value corresponding to the audio channel at the moment is recorded, and the gain corresponding to the audio energy value is the reference gain. When the gain consistency adjustment is carried out, the gain adjustment is carried out by taking the audio energy value as a reference, so that the gain of each audio channel can be ensured to be consistent with the reference gain.
In the embodiment, the audio receiver receives and outputs the audio information of the user to the audio channel of the sound card to perform sound identification, and the display device dynamically displays the identification result of the audio information and the audio energy value, so that the user can acquire the reference gain according to the transcription result and the quantized audio energy value, the acquisition process is simple and fast, and the gain adjustment efficiency is improved.
In order to make the present application more clear to a person skilled in the art, the present application is further described below with reference to specific application scenarios.
Take a court conferencing system as an example. First, the display device 103 such as a computer is turned on, and the sound card gain debugging software B-1 and the voice transcription software B-2 installed on the computer are turned on. In this state, the reference gain is obtained first, and at this time, as shown in fig. 2, the audio receiver 104, such as a court microphone, is connected to one audio channel a12 of the sound card (the sound card has 12 audio channels, which are a1-a12 respectively), and the debugger speaks through the microphone at a specified distance and angle according to a speech script (standardized word number of 300 words), and the speech is processed by the sound card and then outputs the transcription result to the interface of the voice transcription software B-2, and outputs the audio energy value to the interface of the sound card gain debugging software B-1. The user compares the transcription result with the utterance, adjusts the gain adjustment knob of the audio channel a12 until the transcription result reaches the expectation, if the recognition rate is greater than 92%, records the audio energy value of the audio channel a12 at the moment, the gain corresponding to the audio energy value is the reference gain, then records the audio channel a12 and the audio energy value corresponding to the audio channel a12, and uses the recorded values as the reference value BNN for the subsequent gain consistency adjustment.
Then, gain consistency adjustment is performed, in this case, as shown in fig. 3, the court-microphone cable is first detached, and the input end of the audio cable of the audio transmission device 102, for example, 1, in and out of 12, is connected to the audio output end of the calibration sound source 101, for example, an MP3 player (capable of digitally displaying volume), and the 12 output ends are sequentially aligned to the 12 audio channels a1-a12 connected to the sound card. Then, a calibration audio is played through the MP3, the calibration audio is converted into 12 analog audio channels with equal amplitude through an audio cable and is input into the 12 audio channels a1-a12 of the sound card, and an audio energy value is output to the interface of the sound card gain debugging software B-1 after being processed by the sound card, at this time, a user can adjust the volume of the MP3 according to the displayed audio energy value of the audio channel a12 until the audio energy value of the audio channel a12 is the reference value BNN. Then, the gains corresponding to the remaining audio channels a1, a2, … and a11 are adjusted one by one until the audio energy values corresponding to the remaining audio channels are consistent with the reference value BNN, so as to complete the adjustment of the gain consistency.
Further, in order to verify whether the adjusted gain meets the requirement, after the gain adjustment is completed, the audio cable is left for a period of time, such as 1 minute, the audio cable is detached, and the site microphone is sequentially connected to the 12 audio channels a1-a12 of the sound card, as shown in fig. 4. The utterance is then spoken by the user and it is checked whether the gain adjustment meets the actual requirements by looking at the transcription result and the audio energy value.
In this embodiment, the reference gain of the sound card is obtained through the audio receiver and the display device, so that the transcription effect of the sound card is ensured. Then, gain consistency adjustment is carried out on the plurality of audio channels of the sound card through the calibration sound source, the audio transmission equipment and the display equipment until gains of the plurality of audio channels are consistent with the reference gain, wherein the audio transmission equipment can convert the calibration audio into a plurality of analog audios with equal amplitude values, the consistency of the analog audios input to the audio channels is guaranteed, meanwhile, in the debugging process, the audio energy values of the audio channels are quantitatively displayed in real time, so that a user can realize gain consistency adjustment according to the quantized audio energy values, the adjustment efficiency is high, the overall deployment efficiency of a system where the audio transmission equipment is located is effectively improved, the audio energy values are visual, and compared with a mode of adjusting according to scales, the adjustment precision is high, the accuracy of sound identification is effectively improved, and the transcription effect is further improved.
To sum up, the utility model discloses the audio gain adjusting device of sound card not only can effectively improve the efficiency and the precision that sound card gain uniformity adjusted, moreover simple structure, with low costs.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. An apparatus for adjusting audio gain of a sound card, the sound card comprising a plurality of audio channels, each of the plurality of audio channels having an independently adjustable gain, the apparatus comprising:
a calibration audio source for outputting a calibration audio;
an audio transmission device to convert the calibration audio into a plurality of analog audio inputs into the plurality of audio channels;
and the display equipment is used for displaying the audio energy value of each audio channel so that a user can adjust the gain of each audio channel according to the audio energy value until the gains of the audio channels are consistent.
2. The audio gain adjustment apparatus of sound card of claim 1, wherein said audio transmission device comprises an input terminal and a plurality of output terminals, said input terminal of said audio transmission device is connected to said output terminal of said calibration audio source, and said plurality of output terminals of said audio transmission device are correspondingly connected to said plurality of audio channels.
3. The audio gain adjustment apparatus of the sound card according to claim 2, wherein the audio transmission device is an audio cable.
4. The audio gain adjustment apparatus of sound card of claim 2, wherein the output of the calibration audio source is a 3.5mm audio output.
5. The audio gain adjustment apparatus of sound card of claim 1, wherein the frequency and amplitude of the calibration audio source are adjustable.
6. The audio gain adjustment apparatus of a sound card according to claim 1, wherein the sound card further comprises:
the input end of the analog-to-digital converter is correspondingly connected with the plurality of audio channels and is used for converting the analog audio output by each audio channel to obtain corresponding digital audio signals;
and the processor is connected with the output end of the analog-to-digital converter and used for converting the digital audio signal into the audio energy value and sending the audio energy value to the display equipment through a communication interface.
7. The audio gain adjustment apparatus of the sound card of claim 6, wherein the communication interface comprises a wired communication interface or a wireless communication interface.
8. The audio gain adjustment apparatus of a sound card according to any one of claims 1 to 7, wherein the amplitude and frequency of the calibration audio source correspond to a reference gain.
9. The audio gain adjustment apparatus of the sound card according to claim 8, wherein the audio gain adjustment apparatus further comprises:
the output end of the audio receiver is connected with at least one audio channel in the plurality of audio channels and used for receiving the audio information of the user and inputting the audio information to the corresponding audio channel;
the display device is further configured to display a transcription result of the audio information, so that the user can obtain the reference gain according to the transcription result.
10. The audio gain adjustment apparatus of the sound card of claim 9, wherein the audio receiver is a microphone.
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