CN111899768A - Audio file digital conversion system and method - Google Patents
Audio file digital conversion system and method Download PDFInfo
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- CN111899768A CN111899768A CN202010684371.1A CN202010684371A CN111899768A CN 111899768 A CN111899768 A CN 111899768A CN 202010684371 A CN202010684371 A CN 202010684371A CN 111899768 A CN111899768 A CN 111899768A
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10037—A/D conversion, D/A conversion, sampling, slicing and digital quantisation or adjusting parameters thereof
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/10537—Audio or video recording
- G11B2020/10546—Audio or video recording specifically adapted for audio data
- G11B2020/10555—Audio or video recording specifically adapted for audio data wherein the frequency, the amplitude, or other characteristics of the audio signal is taken into account
- G11B2020/10564—Audio or video recording specifically adapted for audio data wherein the frequency, the amplitude, or other characteristics of the audio signal is taken into account frequency
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Abstract
The invention discloses a system and a method for digitally converting an audio file, which comprises an audio decoding module, a digital conversion module and a digital conversion module, wherein the audio decoding module is used for reading an audio file and decoding the audio file to generate a group of original digital audio signals; and the high-pass filtering module is used for performing attenuation processing on the digital audio signals which are lower than a preset cut-off frequency in the original digital audio signals and outputting the digital audio signals, and normally outputting the digital audio signals which are higher than the preset cut-off frequency in the original digital audio signals. Has the advantages that: other recording circuits in the computer can be used for recording, so that when people use the voice reading equipment, the problem of poor pickup effect or damage is found, and the method of switching the audio circuit can be adopted to avoid the problem that the function cannot be used; after gain processing, the volume of sound played by the loudspeaker is improved, and the volume cannot be obviously ignored.
Description
Technical Field
The invention relates to the technical field of audio conversion, in particular to a digital conversion system and method for audio files.
Background
Due to the laggard prior art and the obsolescence of storage devices, the media for recording audio files may deteriorate and be damaged, and some devices (such as tapes, records, etc.) cannot be found. It is necessary to smoothly export and convert the audio into an audio file that is stored in compliance with the modern requirements in order to protect the audio file.
Disclosure of Invention
The invention aims to provide an audio file digital conversion system and method, which can record by using other recording circuits in a computer, so that when people use a voice reading device, the problem of poor pickup effect or damage is found, and the problem that the function cannot be used is avoided by adopting a method of switching the audio circuits; after gain processing, the volume of sound played by the loudspeaker is improved, and the volume cannot be obviously ignored.
The technical scheme of the invention is realized as follows:
a digital conversion system and method of audio file includes audio decoding module for reading an audio file and decoding the audio file to generate a set of original digital audio signals;
the high-pass filtering module is used for performing attenuation processing on the digital audio signals which are lower than a preset cut-off frequency in the original digital audio signals and outputting the digital audio signals, and normally outputting the digital audio signals which are higher than the preset cut-off frequency in the original digital audio signals;
the gain module is used for performing gain processing on the output digital audio signal;
the output module is used for converting the digital audio signal subjected to the gain processing into an analog audio signal and outputting the analog audio signal to an audio amplifier of the electronic equipment, and the audio amplifier amplifies the analog audio signal so as to drive a loudspeaker of the electronic device to restore the analog audio signal into sound;
the recording system further comprises a software testing module, wherein the software testing module detects whether the recording line is modified after being started, and continuously detects a key value pressed by a voice key of a user to determine whether the software testing module starts recording.
If the software testing module starts recording, the digital audio signal array is continuously read from the audio circuit, and the audio signal array is written into the pcm file in a byte stream mode, so that audio is collected from the recording circuit, and the software testing module simultaneously and continuously transmits the audio signal array to a voice recognition interface of the cloud end through the interface for voice recognition;
and if the user is detected to lift the voice key, finishing recording after the residual audio is read.
Further, the preset cut-off frequency is any frequency value in the range of 800HZ to 1200 HZ.
Furthermore, the gain of the output digital audio signal by the gain module is equal to the intensity difference of the digital audio signal with the strongest signal intensity in the standard audio signal and the output digital audio signal, and the intensity of the standard audio signal is 0 dB.
An audio file digital conversion device is characterized by comprising
A memory for storing a computer program;
a processor for implementing an audio archive digital conversion system as claimed in any one of claims 1 to 4 when executing said computer program.
A method for digitally converting an audio file, comprising the steps of:
step 1: transmitting the audio file to a USB port through an internal circuit of the audio decoding module;
step 2: transmitting the original data audio signal to a sound card audio driver of an operating system through a USB port in a wired connection or wireless receiver mode;
and step 3: the sound card audio driver of the operating system converts the analog audio signal into a digital signal and outputs the digital signal to a recording circuit of the operating system through a sound controller;
and 4, step 4: the software finds the corresponding recording line and reads the output audio information.
The invention has the beneficial effects that: a recording line switching method, system, device and readable storage medium are provided to solve the problems set forth in the background art. According to the voice mouse-based recording line switching method, after the voice is damaged or the sound pickup device does not work, other recording lines in a computer can be used for recording, so that when people use the voice reading equipment, the problem that the sound pickup effect is not good or the sound pickup device is damaged is found, and the problem that the function cannot be used is avoided by adopting the method for switching the audio lines.
In addition, the invention firstly attenuates the digital audio signals which are lower than the preset cut-off frequency in the original digital audio signals, namely, the intensity of the digital audio signals which are lower than the preset cut-off frequency is reduced, and as the frequency of the digital audio signals is higher, the intensity of the digital audio signals is weaker, after the high-pass filtering module attenuates the digital audio signals which are lower than the preset cut-off frequency, the difference value between the intensity of the digital audio signals which are lower than the preset cut-off frequency and the intensity of the digital audio signals which are higher than the preset cut-off frequency is reduced, so that the sound volume played by the loudspeaker is improved and the sound volume is not obviously ignored after gain processing.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed 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 invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a flow chart of a method for digitally converting an audio file.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
According to an embodiment of the invention, an audio file digital conversion system and method are provided.
Referring to fig. 1, the system and method for digitally converting an audio file according to the embodiment of the present invention includes an audio decoding module for reading an audio file and decoding the audio file to generate a set of original digital audio signals;
the high-pass filtering module is used for performing attenuation processing on the digital audio signals which are lower than a preset cut-off frequency in the original digital audio signals and outputting the digital audio signals, and normally outputting the digital audio signals which are higher than the preset cut-off frequency in the original digital audio signals;
the gain module is used for performing gain processing on the output digital audio signal;
the output module is used for converting the digital audio signal subjected to the gain processing into an analog audio signal and outputting the analog audio signal to an audio amplifier of the electronic equipment, and the audio amplifier amplifies the analog audio signal so as to drive a loudspeaker of the electronic device to restore the analog audio signal into sound;
in one embodiment, the voice recording device further comprises a software testing module, wherein the software testing module detects whether the recording line is modified after being started, and continuously detects a key value pressed by a voice key of a user to determine whether the software testing module starts recording;
if the software testing module starts recording, the digital audio signal array is continuously read from the audio circuit, and the audio signal array is written into the pcm file in a byte stream mode, so that audio is collected from the recording circuit, and the software testing module simultaneously and continuously transmits the audio signal array to a voice recognition interface of the cloud end through the interface for voice recognition;
and if the user is detected to lift the voice key, finishing recording after the residual audio is read.
In one embodiment, the predetermined cutoff frequency is any frequency value in the range of 800HZ to 1200 HZ.
In one embodiment, the gain of the output digital audio signal by the gain module is equal to the difference between the standard audio signal and the digital audio signal with the strongest signal strength, and the strength of the standard audio signal is 0 dB.
An audio file digital conversion device is characterized by comprising
A memory for storing a computer program;
a processor for implementing an audio archive digital conversion system as claimed in any one of claims 1 to 4 when executing said computer program.
A method for digitally converting an audio file, comprising the steps of:
step 1: transmitting the audio file to a USB port through an internal circuit of the audio decoding module;
step 2: transmitting the original data audio signal to a sound card audio driver of an operating system through a USB port in a wired connection or wireless receiver mode;
and step 3: the sound card audio driver of the operating system converts the analog audio signal into a digital signal and outputs the digital signal to a recording circuit of the operating system through a sound controller;
and 4, step 4: the software finds the corresponding recording line and reads the output audio information.
It should be noted that the size of the cut-off frequency can be set empirically, and the size of the cut-off frequency is preferably any frequency value in the range of 800HZ to 1200 HZ. Taking the cutoff frequency as 800HZ as an example, the high-pass filtering module attenuates the digital audio signals lower than 800HZ in the original digital audio signals and outputs the attenuated digital audio signals, while the intensity of the digital audio signals higher than 800HZ in the original digital audio signals is kept unchanged, i.e. the digital audio signals are normally output.
A recording line switching method, system, device and readable storage medium are provided to solve the problems set forth in the background art. According to the voice mouse-based recording line switching method, after the voice is damaged or the sound pickup device does not work, other recording lines in a computer can be used for recording, so that when people use the voice reading equipment, the problem that the sound pickup effect is not good or the sound pickup device is damaged is found, and the problem that the function cannot be used is avoided by adopting the method for switching the audio lines.
In addition, the invention firstly attenuates the digital audio signals which are lower than the preset cut-off frequency in the original digital audio signals, namely, the intensity of the digital audio signals which are lower than the preset cut-off frequency is reduced, and as the frequency of the digital audio signals is higher, the intensity of the digital audio signals is weaker, after the high-pass filtering module attenuates the digital audio signals which are lower than the preset cut-off frequency, the difference value between the intensity of the digital audio signals which are lower than the preset cut-off frequency and the intensity of the digital audio signals which are higher than the preset cut-off frequency is reduced, so that the sound volume played by the loudspeaker is improved and the sound volume is not obviously ignored after gain processing.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. An audio file digital conversion system, comprising
The audio decoding module is used for reading an audio file and decoding the audio file to generate a group of original digital audio signals;
the high-pass filtering module is used for performing attenuation processing on the digital audio signals which are lower than a preset cut-off frequency in the original digital audio signals and outputting the digital audio signals, and normally outputting the digital audio signals which are higher than the preset cut-off frequency in the original digital audio signals;
the gain module is used for performing gain processing on the output digital audio signal;
and the output module is used for converting the digital audio signal subjected to the gain processing into an analog audio signal and outputting the analog audio signal to an audio amplifier of the electronic equipment, and the audio amplifier amplifies the analog audio signal so as to drive a loudspeaker of the electronic device to restore the analog audio signal into sound.
2. The system for digitally converting an audio file according to claim 1, further comprising a software testing module, wherein the software testing module detects whether the recording line is modified after being started, and continuously detects a key value of a voice key of a user to determine whether the software testing module starts recording;
if the software testing module starts recording, the digital audio signal array is continuously read from the audio circuit, and the audio signal array is written into the pcm file in a byte stream mode, so that audio is collected from the recording circuit, and the software testing module simultaneously and continuously transmits the audio signal array to a voice recognition interface of the cloud end through the interface for voice recognition;
and if the user is detected to lift the voice key, finishing recording after the residual audio is read.
3. The method as claimed in claim 1, wherein the predetermined cutoff frequency is any frequency value in the range of 800HZ to 1200 HZ.
4. The method as claimed in claim 1, wherein the gain of the output digital audio signal by the gain module is equal to the difference between the standard audio signal and the digital audio signal with the strongest signal strength, and the standard audio signal has a strength of 0 dB.
5. An apparatus for digitally converting an audio file as claimed in claim 1, comprising
A memory for storing a computer program;
a processor for implementing an audio archive digital conversion system as claimed in any one of claims 1 to 4 when executing said computer program.
6. The method of claim 1, comprising the steps of:
step 1: transmitting the audio file to a USB port through an internal circuit of the audio decoding module;
step 2: transmitting the original data audio signal to a sound card audio driver of an operating system through a USB port in a wired connection or wireless receiver mode;
and step 3: the sound card audio driver of the operating system converts the analog audio signal into a digital signal and outputs the digital signal to a recording circuit of the operating system through a sound controller;
and 4, step 4: the software finds the corresponding recording line and reads the output audio information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010684371.1A CN111899768A (en) | 2020-07-16 | 2020-07-16 | Audio file digital conversion system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010684371.1A CN111899768A (en) | 2020-07-16 | 2020-07-16 | Audio file digital conversion system and method |
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| CN111899768A true CN111899768A (en) | 2020-11-06 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103237190A (en) * | 2013-03-28 | 2013-08-07 | 浙江一舟电子科技股份有限公司 | VGA (video graphics array) signal to HDMI (high-definition multimedia interface) signal converter |
| CN104168000A (en) * | 2013-05-20 | 2014-11-26 | 深圳富泰宏精密工业有限公司 | Audio processing system and method |
| US20160320923A1 (en) * | 2015-04-29 | 2016-11-03 | Samsung Electronics Co., Ltd. | Display apparatus and user interface providing method thereof |
| CN110989965A (en) * | 2019-11-29 | 2020-04-10 | 安徽咪鼠科技有限公司 | Voice mouse based recording line switching method, system and device and readable storage medium |
-
2020
- 2020-07-16 CN CN202010684371.1A patent/CN111899768A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103237190A (en) * | 2013-03-28 | 2013-08-07 | 浙江一舟电子科技股份有限公司 | VGA (video graphics array) signal to HDMI (high-definition multimedia interface) signal converter |
| CN104168000A (en) * | 2013-05-20 | 2014-11-26 | 深圳富泰宏精密工业有限公司 | Audio processing system and method |
| US20160320923A1 (en) * | 2015-04-29 | 2016-11-03 | Samsung Electronics Co., Ltd. | Display apparatus and user interface providing method thereof |
| CN110989965A (en) * | 2019-11-29 | 2020-04-10 | 安徽咪鼠科技有限公司 | Voice mouse based recording line switching method, system and device and readable storage medium |
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