WO2019084887A1 - Procédé et dispositif de conversion de qualité sonore pour l'audio, terminal et support d'informations lisible par ordinateur - Google Patents

Procédé et dispositif de conversion de qualité sonore pour l'audio, terminal et support d'informations lisible par ordinateur Download PDF

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Publication number
WO2019084887A1
WO2019084887A1 PCT/CN2017/109201 CN2017109201W WO2019084887A1 WO 2019084887 A1 WO2019084887 A1 WO 2019084887A1 CN 2017109201 W CN2017109201 W CN 2017109201W WO 2019084887 A1 WO2019084887 A1 WO 2019084887A1
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WIPO (PCT)
Prior art keywords
audio
signal data
analog signal
mobile terminal
data
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PCT/CN2017/109201
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English (en)
Chinese (zh)
Inventor
祝俊
Original Assignee
深圳传音通讯有限公司
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Priority to PCT/CN2017/109201 priority Critical patent/WO2019084887A1/fr
Publication of WO2019084887A1 publication Critical patent/WO2019084887A1/fr

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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/26—Pre-filtering or post-filtering

Definitions

  • the present invention relates to the field of audio conversion technologies, and in particular, to a method, an apparatus, a terminal, and a computer readable storage medium for audio quality conversion.
  • the device terminal using the Lightning headphone interface needs to carry the HiFi playback device due to hardware limitations, so that the audio quality in the device terminal can be converted into HiFi sound quality.
  • the acquisition of HiFi sound quality has higher hardware requirements for HiFi playback devices. Therefore, HiFi playback devices are generally bulky and not easy to carry, which greatly damages the user experience.
  • the main purpose of the present invention is to provide a method, device, terminal and computer readable storage medium for audio quality conversion, which aims to solve the technical problem that the Lightning earphone interface is bulky and inconvenient to carry due to hardware limitations.
  • an embodiment of the present invention provides a voice quality conversion method for audio.
  • the audio quality conversion method of the audio is applied to a mobile terminal.
  • the mobile terminal has a HiFi decoding module, and the audio quality conversion method includes:
  • the mobile terminal performs HiFi decoding on the audio data based on the HiFi decoding module to obtain digital signal data;
  • the mobile terminal converts the digital signal data into analog signal data
  • the mobile terminal performs audio output on the analog signal data.
  • the step of the terminal performing audio output of the analog signal data comprises:
  • the mobile terminal performs filtering processing on the analog signal data to obtain filtered analog signal data
  • the mobile terminal performs audio output on the filtered analog signal data.
  • the filtering process includes a noise reduction process
  • the step of filtering the analog signal data by the mobile terminal to obtain the filtered processed analog signal data includes:
  • the mobile terminal analyzes the analog signal data to obtain the signal frequency of each signal interval of the analog signal data
  • the mobile terminal performs noise analysis on the signal frequency to obtain an analysis result
  • the mobile terminal performs noise reduction processing on the signal frequency whose noise amount is greater than the preset threshold according to the analysis result, and obtains the analog signal data processed by the noise reduction.
  • the filtering processing manner includes high-pass filtering, low-pass filtering, band-pass filtering, and band-stop filtering.
  • the step of filtering the analog signal data by the mobile terminal to obtain the filtered processed analog signal data further includes:
  • the mobile terminal performs low noise adjustment on the analog signal data.
  • the method further includes:
  • the mobile terminal amplifies the data signal of the analog signal data.
  • the step of the mobile terminal performing audio output of the analog signal data further includes:
  • the mobile terminal analyzes the signal feature type of the analog signal data, and determines the style type of the audio data;
  • the mobile terminal performs audio output on the analog signal data according to the output mode conforming to the style type.
  • the present invention also provides a sound quality conversion device, the sound quality conversion device comprising:
  • a decoding module configured to perform HiFi decoding on the audio data based on the HiFi decoding module to obtain digital signal data
  • a conversion module for converting digital signal data into analog signal data
  • An output module for audio output of analog signal data An output module for audio output of analog signal data.
  • the present invention further provides a voice quality conversion terminal, the sound quality conversion terminal comprising: a memory, a processor, a communication bus, and a sound quality conversion program of audio stored on the memory,
  • the communication bus is used to implement a communication connection between the processor and the memory
  • the processor is configured to execute a sound quality conversion program of the audio to implement the following steps:
  • the mobile terminal has a built-in HiFi decoding module, and the audio quality conversion method of the audio includes:
  • the mobile terminal performs HiFi decoding on the audio data based on the HiFi decoding module to obtain digital signal data;
  • the mobile terminal converts the digital signal data into analog signal data
  • the mobile terminal performs audio output on the analog signal data.
  • the step of the terminal performing audio output of the analog signal data comprises:
  • the mobile terminal performs filtering processing on the analog signal data to obtain filtered analog signal data
  • the mobile terminal performs audio output on the filtered analog signal data.
  • the filtering process includes a noise reduction process
  • the step of filtering the analog signal data by the mobile terminal to obtain the filtered processed analog signal data includes:
  • the mobile terminal analyzes the analog signal data to obtain the signal frequency of each signal interval of the analog signal data
  • the mobile terminal performs noise analysis on the signal frequency to obtain an analysis result
  • the mobile terminal performs noise reduction processing on the signal frequency whose noise amount is greater than the preset threshold according to the analysis result, and obtains the analog signal data processed by the noise reduction.
  • the filtering processing manner includes high-pass filtering, low-pass filtering, band-pass filtering, and band-stop filtering.
  • the step of filtering the analog signal data by the mobile terminal to obtain the filtered processed analog signal data further includes:
  • the mobile terminal performs low noise adjustment on the analog signal data.
  • the method further includes:
  • the mobile terminal amplifies the data signal of the analog signal data.
  • the step of the mobile terminal performing audio output of the analog signal data further includes:
  • the mobile terminal analyzes the signal feature type of the analog signal data, and determines the style type of the audio data;
  • the mobile terminal performs audio output on the analog signal data according to the output mode conforming to the style type.
  • the present invention also provides a computer readable storage medium storing one or more programs, the one or more programs being configurable by one or more processors Execute for:
  • the mobile terminal performs HiFi decoding on the audio data based on the HiFi decoding module to obtain digital signal data;
  • the mobile terminal converts the digital signal data into analog signal data
  • the mobile terminal performs audio output on the analog signal data.
  • the mobile terminal performs HiFi decoding on the audio data based on the HiFi decoding module to obtain digital signal data; and converts the digital signal data into analog signal data; finally, the analog signal data is audio output, so that the user even
  • the Lightning interface also does not need to carry a large and heavy HiFi playback device, which is convenient for the user to carry, avoiding the inconvenience of carrying due to defects in the volume and weight of the HiFi playback device, and greatly improving the user experience.
  • FIG. 1 is a schematic flow chart of a preferred embodiment of a method for converting audio quality of audio according to the present invention
  • FIG. 2 is a schematic diagram of still another process in an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of functional modules of a preferred embodiment of a sound quality conversion device of the present invention.
  • FIG. 5 is a schematic structural diagram of a device in a hardware operating environment according to a method according to an embodiment of the present invention.
  • the invention provides a method for converting sound quality of audio.
  • FIG. 1 is a schematic flow chart of a preferred embodiment of a method for converting audio quality of audio according to the present invention.
  • an embodiment of the audio quality conversion method of audio is provided. It should be noted that although the logical order is shown in the flowchart, in some cases, the execution may be performed in a different order from here. The steps shown or described.
  • the audio quality conversion method of the audio includes:
  • Step S10 The mobile terminal performs HiFi decoding on the audio data based on the HiFi decoding module to obtain digital signal data.
  • the HiFi is High-Fidelity, which means high fidelity. In this embodiment, it refers to playback audio that is highly similar to the original sound. Generally speaking, it refers to the high-reduction of audio data, so it can be used as a detection standard for audio quality. .
  • the audio data can effectively reflect the high fidelity of the audio data.
  • the digital signal data may be PCM data, that is, pulse code modulated data, and the HiFi decoding module built in the mobile terminal generates binary pulse codes “0” and “1” by performing on-off modulation on the audio data, that is, performing audio data. Analyze, obtain and quantize and encode the data features therein.
  • the quantization step refers to discretizing the information in the initial audio data, and using a set of predetermined levels to use the information to the nearest level. Indicates that the level value is expressed in binary. Coding refers to the use of a set of binary code groups to represent each quantized value having a fixed level.
  • the digital signal data composed of the binary pulse code group has a state of only "0" and "1", so the digital signal data is hardly interfered by other factors, so the audio data is processed by HiFi decoding.
  • the digital signal data formed afterwards can restore the original sound quality of the audio data to the utmost extent, thereby achieving the HiFi high-fidelity sound quality standard.
  • Step S20 the mobile terminal converts the digital signal data into analog signal data
  • the digital signal data needs to be converted into analog signal data to be recognized by the mobile terminal for reading.
  • a digital/analog converter is built in the mobile terminal for converting a digital signal into an analog signal device so that the data can be recognized by other devices.
  • the analog signal is usually a waveform analog signal to the original data source. Since the digital signal data maximizes the high fidelity of the audio data, large data distortion can be avoided by converting it into analog signal data. Thereby ensuring the quality of the audio data.
  • the mobile terminal After obtaining the digital signal data, the mobile terminal determines and analyzes the digital quantity in the digital signal data, and converts the digital quantity into an analog quantity through the weight resistance bit network analysis, wherein the conversion mode is divided into a binary weight resistance network conversion and a T-type resistance.
  • Network conversion according to the conversion principle of the DAC digital-to-analog converter, the analog voltage in the obtained analog signal data is proportional to the input digital quantity.
  • step S30 the mobile terminal performs audio output on the analog signal data.
  • the mobile terminal transmits the acquired analog signal data to the audio output device for audio playback, that is, the analog output data is read by the audio output device, thereby parsing and outputting the analog signal data.
  • the step S30 includes:
  • Step S31 the mobile terminal performs filtering processing on the analog signal data to obtain filtered analog signal data.
  • the filtering process is mainly to filter illegal data in the analog signal data.
  • the specific frequency of the signal band is obtained, and the signal band that does not meet the preset frequency is filtered, thereby filtering out the analog signal data that meets the preset frequency.
  • the filtering process includes a noise reduction process
  • the step S31 can be refined to:
  • Step S311 the mobile terminal analyzes the analog signal data to obtain a signal frequency of each signal interval of the analog signal data
  • Step S312 the mobile terminal performs noise analysis on the signal frequency to obtain an analysis result.
  • Step S313 the mobile terminal performs noise reduction processing on the signal frequency whose noise amount is greater than the preset threshold according to the analysis result, and obtains the noise reduction processed analog signal data.
  • the filtering process includes noise reduction on the signal data.
  • a large amount of noise may be generated due to the operation error of the digital/analog converter or the inaccuracy of the conversion algorithm.
  • the noise will have a certain negative impact on the final playback of the analog signal data. Therefore, the mobile terminal will analyze according to the signal band of the analog signal data, thereby obtaining the signal frequency of the analog signal data in different signal intervals.
  • the signal interval refers to the band interval of the analog signal data, and the specific characteristics of the analog signal data in the signal interval will be reflected by the signal frequency.
  • the mobile terminal acquires the signal frequency and performs noise analysis on it to obtain a noise analysis result of the signal frequency.
  • the noise analysis is an analysis process for detecting and screening a signal frequency that does not meet a preset frequency. Based on the analysis results, the mobile terminal determines whether there is noise in the signal band and the amount of noise that occurs.
  • the mobile terminal sets a preset threshold as a limitation of the signal frequency.
  • the mobile terminal determines the corresponding signal frequency and performs noise reduction processing thereon, thereby reducing the amount of noise in the signal frequency. Guarantee the quality of analog signal data.
  • the filtering processing method includes high-pass filtering, low-pass filtering, band-pass filtering, and band-stop filtering.
  • the rule of high-pass filtering is that the high-frequency signal can pass normally, and the low-frequency signal below the set threshold is blocked and weakened;
  • the rule of low-pass filtering is that the low-frequency signal can pass normally, and the high-frequency signal exceeding the set threshold is blocked and weakened;
  • the rule of bandpass filtering is to pass frequency components in a certain frequency range, but to attenuate other ranges of frequency components to an extremely low level;
  • the rule of band-stop filtering is to pass most of the frequency components, but to a certain range of frequency components to a very low level.
  • the mobile terminal can filter out invalid data in the analog signal data that does not meet the demand, thereby obtaining high quality analog signal data.
  • Step S32 the mobile terminal performs audio output on the filtered analog signal data.
  • the terminal After the noise reduction processing of each signal frequency in the analog signal data is completed, the terminal acquires the analog signal data after optimization and processing such as filtering and noise reduction, and transmits the analog signal data to an audio output device such as a speaker horn for output playback.
  • an audio output device such as a speaker horn for output playback.
  • the method may further include:
  • the mobile terminal performs low noise adjustment on the analog signal data.
  • the low noise adjustment refers to an audio volume adjustment of analog signal data by using an adjustment device with a low noise figure.
  • the volume is generally used as a high frequency or intermediate frequency pre-regulator for various types of radio receivers, as well as a regulating circuit for high-sensitivity electronic detection equipment.
  • the noise of the regulator itself may be very serious, which may cause data distortion and generate a large amount of noise, thereby reducing the signal-to-noise ratio of the audio output.
  • the adjustment device with low noise system can maximize the sound quality of the original audio data during the adjustment of the analog signal data, and prevent a large amount of noise data from being generated in the analog signal data due to the adjustment fluctuation.
  • the signal-to-noise ratio of the audio output restores the original analog signal data.
  • the difference between the second embodiment of the audio quality conversion method of the audio and the first embodiment of the audio quality conversion method of the audio is that after the step of converting the digital signal data into analog signal data by the 20 mobile terminal, the method further includes:
  • the mobile terminal amplifies the data signal of the analog signal data.
  • the analog signal data After the mobile terminal converts the digital signal data into analog signal data, the analog signal data needs to be output. Part of the output system needs to reach a certain power when outputting analog signal data to ensure that the analog signal data output is not lost. Therefore, the analog signal data can be amplified to boost the load, including the output power, output intensity, and output of the amplified analog signal data.
  • the frequency, etc., by controlling the input signal of the analog signal data, causes the amplifying circuit to adjust the input energy to a larger output energy to push the load.
  • the signal waveform of the analog signal data does not change during the amplification process, ensuring that the signal is not distorted, otherwise it is easy to cause the information to be transmitted to be lost.
  • the device module for amplifying the data signal may include an inverse proportional operation amplifier, a similar operational amplifier, a voltage follower, a subtraction amplifier, and the like.
  • the data signal is amplified by analog voltage data by introducing voltage negative feedback, reducing the output resistance, etc., improving the signal output power, ensuring that the signal output is not distorted, and ensuring the signal output quality.
  • the mobile terminal analyzes the signal feature type of the analog signal data, and determines the style type of the audio data;
  • the mobile terminal performs audio output on the analog signal data according to the output mode conforming to the style type.
  • the analog signal data is audio data recognized by the mobile terminal, and the audio data is usually composed of different audio styles. In real-life scenarios, audio data has its own tune style, including rock, country, pop, folk, and more. Different styles of audio data need to be adapted to the HiFi playback style.
  • the mobile terminal has a corresponding intelligent HiFi audio recognition module, and before the audio output, the waveform band of the analog signal data can be analyzed, and the signal frequency, signal strength or waveform of the band in the analog signal data is simulated. The cycle counts to derive which style type the audio data conforms to.
  • the waveform period in the analog signal data is relatively flat, and the signal strength of the band is not high, and the oscillation is kept within a fixed range, and the waveform period is irregular, and the repetition band is not much, then according to the intelligent HiFi audio in the mobile terminal.
  • the analysis and recognition function of the identification module determines the style type of the audio data as a folk song.
  • the mobile terminal can adjust the play style in the audio output device to the folk style output mode, for example, reduce the volume of the audio play, improve the playback resolution of the audio, reduce the noise data of the audio data, and reduce the output tone to match Audio features of the folk style.
  • the present invention further provides a sound quality conversion device.
  • FIG. 3 is a schematic diagram of functional modules of a preferred embodiment of the sound quality conversion device of the present invention.
  • the block diagram shown in FIG. 3 is merely an exemplary diagram of a preferred embodiment, and those skilled in the art can easily perform the module of the voice quality conversion apparatus shown in FIG.
  • the core of the technical solution of the present invention is that each name is defined. The functionality that the module has to achieve.
  • the decoding module 10 is configured to perform HiFi decoding on the audio data based on the HiFi decoding module to obtain digital signal data.
  • the HiFi is High-Fidelity, which means high fidelity. In this embodiment, it refers to playback audio that is highly similar to the original sound. Generally speaking, it refers to the high-reduction of audio data, so it can be used as a detection standard for audio quality. .
  • the audio data can effectively reflect the high fidelity of the audio data.
  • the digital signal data may be PCM data, that is, pulse code modulated data, and the HiFi decoding module 10 built in the mobile terminal generates binary pulse codes “0” and “1” by performing on-off modulation on the audio data, that is, audio data. Performing an analysis to obtain and quantize and encode the data features therein.
  • the quantization step refers to discretizing the information in the initial audio data, and using the specified level to use the information to the closest level. To indicate that the level value is expressed in binary. Coding refers to the use of a set of binary code groups to represent each quantized value having a fixed level.
  • the digital signal data composed of the binary pulse code group has a state of only "0" and "1", so the digital signal data is hardly interfered by other factors, so the audio data is processed by HiFi decoding.
  • the digital signal data formed afterwards can restore the original sound quality of the audio data to the utmost extent, thereby achieving the HiFi high-fidelity sound quality standard.
  • a conversion module configured to convert digital signal data into analog signal data
  • the digital signal data needs to be converted into analog signal data to be recognized by the mobile terminal for reading.
  • the conversion module 20 is built in the mobile terminal, and may be a digital/analog converter, which is a device for converting a digital signal into an analog signal, so that the data can be recognized by other devices.
  • the analog signal is usually a waveform analog signal to the original data source. Since the digital signal data maximizes the high fidelity of the audio data, large data distortion can be avoided by converting it into analog signal data. Thereby ensuring the quality of the audio data.
  • the output module 30 is configured to perform audio output on the analog signal data.
  • the output module 30 transmits the acquired analog signal data to the audio output device for audio playback, that is, the analog output data is read by the audio output device, thereby parsing and outputting the analog signal data.
  • FIG. 4 is a structural diagram of an architecture in an embodiment of the present invention.
  • the audio data stored in the mobile terminal based on the Lightning interface is first transmitted to the HiFi decoding chip, thereby converting the audio data into the PCM data of the 32-bit audio digital signal, ensuring high fidelity of the audio.
  • the PCM data is then passed to a DAC digital-to-analog converter to convert the PCM digital signal to an analog signal.
  • the analog signal data is transmitted to the low noise amplifier for audio amplification, and then the audio output is performed by a 3.5 mm earphone.
  • noise may occur after the audio is amplified, and the noise reduction processing unit may perform noise reduction filtering.
  • FIG. 5 is a schematic structural diagram of a device in a hardware operating environment involved in a method according to an embodiment of the present invention.
  • the terminal in the embodiment of the present invention may be a PC, or may be a smart phone, a tablet computer, an e-book reader, and an MP3 (Moving). Picture Experts Group Audio Layer III, motion picture expert compresses standard audio layer 3) player, MP4 (Moving Picture Experts Group Audio Layer IV, dynamic video experts compress standard audio layers 4) terminal devices such as players and portable computers.
  • MP3 Motion Picture Experts Group Audio Layer III, motion picture expert compresses standard audio layer 3
  • MP4 Moving Picture Experts Group Audio Layer IV, dynamic video experts compress standard audio layers 4
  • terminal devices such as players and portable computers.
  • the sound quality conversion terminal may include a processor 1001, such as a CPU, a memory 1005, and a communication bus 1002.
  • the communication bus 1002 is used to implement connection communication between the processor 1001 and the memory 1005.
  • the memory 1005 may be a high speed RAM memory or a stable memory (non-volatile) Memory), such as disk storage.
  • the memory 1005 can also optionally be a storage device independent of the aforementioned processor 1001.
  • the voice quality conversion terminal may further include a user interface, a network interface, a camera, and an RF (Radio) Frequency, RF) circuits, sensors, audio circuits, WiFi modules, and more.
  • the user interface may include a display, an input unit such as a keyboard, and the optional user interface may also include a standard wired interface, a wireless interface.
  • the network interface can optionally include a standard wired interface or a wireless interface (such as a WI-FI interface).
  • the structure of the sound quality conversion terminal shown in FIG. 5 does not constitute a limitation of the sound quality conversion terminal, and may include more or less components than those illustrated, or combine some components or different components. Arrangement.
  • a memory 1005 as a computer storage medium may include an operating system, a network communication module, and an audio quality conversion program.
  • the operating system is a program that manages and controls the hardware and software resources of the sound quality conversion terminal, and supports audio quality conversion programs and other software and/or programs.
  • the network communication module is used to implement communication between components within the memory 1005 and with other hardware and software in the sound quality conversion terminal.
  • the processor 1001 is configured to execute a sound quality conversion program of the audio stored in the memory 1005, and implement the following steps:
  • the mobile terminal performs HiFi decoding on the audio data based on the HiFi decoding module to obtain digital signal data;
  • the mobile terminal converts the digital signal data into analog signal data
  • the mobile terminal performs audio output on the analog signal data.
  • step of the terminal performing audio output of the analog signal data includes:
  • the mobile terminal performs filtering processing on the analog signal data to obtain filtered analog signal data
  • the mobile terminal performs audio output on the filtered analog signal data.
  • the filtering process includes a noise reduction process
  • the step of the mobile terminal filtering the analog signal data to obtain the filtered processed analog signal data includes:
  • the mobile terminal analyzes the analog signal data to obtain the signal frequency of each signal interval of the analog signal data
  • the mobile terminal performs noise analysis on the signal frequency to obtain an analysis result
  • the mobile terminal performs noise reduction processing on the signal frequency whose noise amount is greater than the preset threshold according to the analysis result, and obtains the analog signal data processed by the noise reduction.
  • the filtering processing manner includes high-pass filtering, low-pass filtering, band-pass filtering, and band-stop filtering.
  • the method further includes:
  • the mobile terminal performs low noise adjustment on the analog signal data.
  • the method further includes:
  • the mobile terminal amplifies the data signal of the analog signal data.
  • step of the mobile terminal performing audio output of the analog signal data further includes:
  • the mobile terminal analyzes the signal feature type of the analog signal data, and determines the style type of the audio data;
  • the mobile terminal performs audio output on the analog signal data according to the output mode conforming to the style type.
  • the specific implementation of the sound quality conversion terminal of the present invention is substantially the same as the embodiment of the audio quality conversion method of the above audio, and details are not described herein again.
  • the invention also provides a computer readable storage medium storing one or more programs, the one or more programs being further executable by one or more processors for:
  • the mobile terminal performs HiFi decoding on the audio data based on the HiFi decoding module to obtain digital signal data;
  • the mobile terminal converts the digital signal data into analog signal data
  • the mobile terminal performs audio output on the analog signal data.
  • the embodiment of the computer readable storage medium of the present invention is substantially the same as the embodiment of the audio quality conversion method of the above audio, and details are not described herein again.
  • the foregoing embodiment method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is better.
  • Implementation Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
  • the optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

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  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
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Abstract

L'invention concerne un procédé et un dispositif de conversion de qualité sonore pour l'audio, un dispositif terminal et un support d'informations lisible par ordinateur. Le procédé comprend les étapes suivantes : un terminal mobile effectue un décodage HiFi sur des données audio au moyen d'un module de décodage HiFi (S10) pour acquérir des données de signal numérique ; le terminal mobile convertit les données de signal numérique en données de signal analogique (S20) ; et le terminal mobile émet les données de signal analogique sous forme de son (S30). Ce dispositif est pratique à transporter pour un utilisateur et évite que le transport soit difficile en raison des inconvénients que présente un dispositif de lecture HiFi sur le plan du volume et du poids.
PCT/CN2017/109201 2017-11-03 2017-11-03 Procédé et dispositif de conversion de qualité sonore pour l'audio, terminal et support d'informations lisible par ordinateur WO2019084887A1 (fr)

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