Audio signal processing equipment and method

Abstract

The embodiment of the invention provides an audio signal processing device and method, and the device comprises a plurality of audio signal processing modules which are used for carrying out the different gain processing of homologous audio signals, and obtaining multiple paths of target audio signals, each path of target audio signal is not completely the same; the audio signal processing module is used for synthesizing the multiple paths of target audio signals to generate wide dynamic range signals corresponding to the audio signals; and the encoder is used for encoding the wide dynamic range signal, and the encoded wide dynamic range signal is used for being sent to target equipment to be output. The audio signal processing equipment can generate audio signals with different width ranges based on the audio signal processing module with common precision.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of smart devices, and in particular to an audio signal processing device and method. Background Art

[0002] Audio recording equipment is now widely used. However, as users' pursuit of sound quality increases, using conventional audio recording technology in systems that need to output high-quality audio often results in insufficient audio resolution and dynamic range. This leads to problems such as unclear small signals and suppressed large signals. For example, the signals in the high and low frequency stages cannot reproduce the true effect.

[0003] To address the above issues, the industry generally solves them by adopting high-precision AD modules. This solution mainly includes the following steps / modules: using high-precision AD modules to collect high-precision signals and using algorithms to reconstruct wide dynamic range signals.

[0004] However, the use of high-precision AD modules still has some problems, such as complex hardware design, high cost, and difficulty in using them in ordinary household devices. Moreover, the accuracy of high-precision AD modules is also limited, and they cannot reconstruct signals over a wider range. Summary of the Invention

[0005] The present invention provides an audio signal processing device and method capable of generating audio signals with different width ranges based on an audio signal processing module of general precision.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides an audio signal processing device, including:

[0007] The audio signal processing modules include a plurality of audio signal processing modules, wherein the plurality of audio signal processing modules are used to perform different gain processing on the same source audio signal to obtain multiple target audio signals, each target audio signal being different from the other;

[0008] An audio signal synthesis module, configured to synthesize multiple target audio signals to generate a wide dynamic range signal corresponding to the audio signal;

[0009] The encoder is used to encode the wide dynamic range signal, and the encoded wide dynamic range signal is used to be sent to a target device for output.

[0010] In one embodiment, the audio signal processing module is an analog-to-digital conversion module.

[0011] In one embodiment, the plurality of audio signal processing modules respectively perform different gain processing on the audio signal of the same source based on different gain coefficients.

[0012] In one embodiment, a signal frequency band that needs to be amplified and a target volume value that the target frequency band is required to reach are determined, and the gain coefficient is determined based on the corresponding signal frequency band and target volume value.

[0013] In one embodiment, the wide dynamic range signal is a floating point wide dynamic range signal, and the encoder is an encoder that supports encoding the floating point wide dynamic range signal.

[0014] In one embodiment, the audio signal processing module further includes a filtering module, which is used to filter the target audio signal generated by the audio signal processing module. The filtering modules of different audio signal processing modules are the same or different.

[0015] Another embodiment of the present invention also provides an audio signal processing method, including:

[0016] In response to the obtained input instruction, determining gain information about the audio signal of the same source based on the input instruction;

[0017] Determining an audio signal processing module to be called based on the gain information;

[0018] Inputting the audio signal into each of the audio signal processing modules, and controlling each of the audio signal processing modules to perform different gain processing on the obtained audio signals based on the gain information, to obtain multiple target audio signals;

[0019] Performing synthesis processing on the multiple target audio signals to generate wide dynamic range signals corresponding to the audio signals;

[0020] The wide dynamic range signal is encoded and sent to a target device for output.

[0021] In one embodiment, the gain signal includes a frequency band for which the audio signal needs to be amplified and a volume value corresponding to the frequency band after amplification;

[0022] The determining of the audio signal processing module to be called based on the gain information includes:

[0023] The audio signal processing module to be called is determined based on the frequency band that needs to be amplified.

[0024] In one embodiment, controlling each of the audio signal processing modules to perform different gain processing on the obtained audio signals based on the gain information includes:

[0025] determining a gain coefficient based on the frequency band and the corresponding volume value;

[0026] The audio signal processing modules are controlled to perform different gain processing on the obtained audio signals based on corresponding gain coefficients.

[0027] In one embodiment, the method further comprises:

[0028] The target audio signals generated by each of the audio signal processing modules are filtered based on different filtering algorithms.

[0029] Based on the disclosure of the above embodiments, it can be known that the beneficial effects of the embodiments of the present invention include the ability to use a common audio signal processing module to process the collected source audio signal, so as to generate and transmit a wide dynamic range signal. This ensures that the target device as the receiving end can reconstruct the wide dynamic range signal based on the obtained encoded data, thereby effectively retaining the accuracy of signals of various intensity levels. In other words, users can operate on source audio signals of different intensity levels separately according to actual needs to achieve gain processing in different frequency bands. In addition, by using an encoder that supports a wide dynamic range to encode the target audio signal, a larger compression ratio can be obtained, effectively reducing the transmission bit rate and storage capacity.

[0030] Other features and advantages of the present application will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present application. The purposes and other advantages of the present application can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0031] The technical solution of the present application is further described in detail below through the accompanying drawings and examples. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 2 is a schematic structural diagram of an audio signal processing device in an embodiment of the present invention.

[0034] Figure 2 Schematic diagram of audio signal synthesis in an application embodiment of the present invention.

[0035] Figure 3 FIG. 4 is a flow chart of an audio signal processing method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0036] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but are not intended to limit the present invention.

[0037] It should be understood that various modifications may be made to the embodiments disclosed herein. Therefore, the following description should not be considered as limiting, but merely as an example of an embodiment. Other modifications within the scope of the present disclosure will occur to those skilled in the art.

[0038] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the general description of the present disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the present disclosure.

[0039] These and other characteristics of the invention will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0040] It should also be understood that although the invention has been described with reference to certain specific examples, those skilled in the art will be able to realize many other equivalent forms of the invention that have the characteristics recited in the claims and are therefore within the scope of protection defined thereby.

[0041] The above and other aspects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0042] Specific embodiments of the present disclosure will be described hereinafter with reference to the accompanying drawings; however, it should be understood that the disclosed embodiments are merely examples of the present disclosure, which may be implemented in a variety of ways. Well-known and / or repetitive functions and structures are not described in detail to avoid obscuring the present disclosure with unnecessary or redundant detail. Therefore, the specific structural and functional details disclosed herein are not intended to be limiting, but rather serve merely as a basis and representative basis for the claims to teach those skilled in the art to variously employ the present disclosure with substantially any suitable detailed structure.

[0043] This description may use the phrases "in one embodiment," "in another embodiment," "in a further embodiment," or "in other embodiments," each of which may refer to one or more of the same or different embodiments according to the present disclosure.

[0044] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0045] like Figure 1 As shown, an embodiment of the present invention provides an audio signal processing device, including:

[0046] The audio signal processing modules include a plurality of audio signal processing modules, wherein the plurality of audio signal processing modules are used to perform different gain processing on the same source audio signal to obtain multiple target audio signals, each target audio signal being different from the other;

[0047] An audio signal synthesis module, configured to synthesize multiple target audio signals to generate a wide dynamic range signal corresponding to the audio signal;

[0048] The encoder is used to encode the wide dynamic range signal, and the encoded wide dynamic range signal is used to be sent to a target device for output.

[0049] In this embodiment, the audio signal processing module is an analog-to-digital conversion module, i.e., an AD module. The AD module is an AD module of ordinary precision. The audio processing device in this embodiment performs different gain processing on the source audio signal by adding multiple AD modules of ordinary precision, thereby achieving gain on different frequency bands of the source audio signal. That is, each audio signal processing module is equivalent to a gain path. Through the processing of each gain path, when the audio signal is output, the user can clearly and accurately hear the audio of the gained part. For example, by gaining the treble and bass bands, the sound effects of the treble and bass bands can be simultaneously ensured when the audio signal is output.

[0050] The number of the audio signal processing modules is not unique and can be two or more. The number of the called audio signal processing modules is different depending on the audio signal from different sources and the frequency bands for which gain processing is desired.

[0051] In this embodiment, the number of audio signal processing modules to be used, or the audio signal processing modules to be constructed, can be determined by determining the number of frequency bands that need to be amplified. For example, if a user wants to amplify the treble and bass bands, he or she can choose to set a high-gain audio signal processing module and a low-gain audio signal processing module, that is, to set up two audio signal processing modules. The target audio signals output by the two audio signal processing modules are synthesized by the audio signal synthesis module to obtain an audio signal in which both the treble and bass bands are enhanced. For details, please refer to Figure 2 shown.

[0052] Of course, the frequency bands that require gain are not limited to the treble and bass bands, but can also include frequency bands within other volume ranges. Users can flexibly specify and configure them, thereby achieving independent gain processing for sound effects in different frequency bands, providing great flexibility. This means that audio signal processing modules and gain coefficients can be selected based on actual needs, achieving customized signal accuracy at various intensity levels.

[0053] Furthermore, the multiple audio signal processing modules each perform different gain processing on the same source audio signal based on different gain coefficients. That is, each audio signal processing module processes the source audio signal based on the corresponding gain coefficient when processing the acquired audio signal. Different gain processing is performed on different frequency bands to achieve different sound effects, and the gain coefficients used are different.

[0054] In this embodiment, when determining the gain coefficient, the signal frequency band to be amplified and the target volume value required to be reached by the target frequency band are first determined. Then, the gain coefficient is determined based on the corresponding signal frequency band and target volume value.

[0055] As an optional embodiment, to facilitate signal processing, the wide dynamic range signal in this embodiment is a floating-point wide dynamic range signal, and the encoder is an encoder that supports encoding of floating-point wide dynamic range signals. For example, LC3 (supporting exponential quantization coefficients) can produce high-compression ratio encoded data, allowing wide dynamic range signals to be stored or transmitted on devices with limited bandwidth and space, effectively reducing transmission bit rate and storage capacity.

[0056] The audio signal processing module also includes a filtering module. Different audio signal processing modules may have the same or different filtering modules. The filtering module is used to filter the target audio signal generated by the audio signal processing module to remove noise and may also filter out sound signals that the user is not interested in. The specific details vary.

[0057] In actual use, different filtering modules may be used for filtering high-frequency band signals and low-frequency band signals, so as to implement filtering in different ranges based on different filtering algorithms.

[0058] In addition, the audio signal processing device in this embodiment may also be provided with a microphone for collecting and generating the audio signal. The audio signal processing device in this embodiment may specifically be, but not limited to, an audio recording device, and may also be other terminal devices, such as a mobile phone.

[0059] like Figure 3 As shown, another embodiment of the present invention also provides an audio signal processing method, including:

[0060] S1: In response to an input instruction obtained, determining gain information about an audio signal of the same source based on the input instruction;

[0061] S2: Determine an audio signal processing module to be called based on the gain information;

[0062] S3: inputting the audio signal into each of the audio signal processing modules, and controlling each of the audio signal processing modules to perform different gain processing on the obtained audio signals based on the gain information, to obtain multiple target audio signals;

[0063] S4: synthesizing the multiple target audio signals to generate a wide dynamic range signal corresponding to the audio signal;

[0064] S5: Encode the wide dynamic range signal and send it to a target device for output.

[0065] The audio signal processing method in this embodiment is applied to the aforementioned audio signal processing device, which has an input terminal for user input of command information. For example, the device system receives a user input command through the input terminal and, in response to the input command, determines gain information about the audio signal. This gain information indicates how the user desires to gain the audio signal. Based on this gain information, the system determines which audio signal processing module to invoke and replicates the audio signal to send it to each audio signal processing module. Next, based on the gain information indicating how the user desires to gain the audio signal, the system controls the invoked multiple audio signal processing modules to perform matching gain processing on the obtained audio signal, generating the corresponding target audio signal. After each audio signal processing module completes the gain processing on the audio signal, the system generates multiple target audio signals. The system then uses the audio signal synthesis module to synthesize these multiple target audio signals, synthesizing the multi-channel signals into a wide dynamic range signal corresponding to the audio signal. An encoder is then invoked to encode the wide dynamic range signal, generating the corresponding encoded data. The wide dynamic range signal in this embodiment is a floating-point wide dynamic range signal, which can facilitate signal processing by the encoder and decoder.

[0066] The system can send the encoded data to the target device via the transmitter. Upon receiving the encoded data, the target device invokes a decoder to decode it, generating a wide dynamic range signal. Furthermore, in response to different user input commands, the target device can also use filters to separate the wide dynamic range signal to obtain the intensity signal of interest. Alternatively, the target device can isolate the intensity signal suitable for playback based on its own playback capabilities, ensuring smooth playback.

[0067] Furthermore, the gain signal includes a frequency band for which gain is required for the audio signal and a volume value corresponding to the frequency band after gain. The frequency band and volume value are not specific and can be flexibly set by the user.

[0068] The determining of the audio signal processing module to be called based on the gain information includes:

[0069] S6: Determine the audio signal processing module to be called based on the frequency band that needs to be amplified.

[0070] The controlling each of the audio signal processing modules to perform different gain processing on the obtained audio signals based on the gain information includes:

[0071] S7: determining a gain coefficient based on the frequency band and the corresponding volume value;

[0072] S8: Control each of the audio signal processing modules to perform different gain processing on the obtained analog signals based on corresponding gain coefficients.

[0073] Exemplarily, the system determines the frequency bands to be amplified, the number of frequency bands, and the volume value of each amplified frequency band based on the gain information. It then calls a matching number of audio signal processing modules based on the number of frequency bands. Gain coefficients are then determined based on the frequency bands and corresponding volume values. These gain coefficients are then distributed to the corresponding audio signal processing modules, which then perform gain processing on the specified frequency bands in the audio signal based on the obtained gain coefficients.

[0074] Alternatively, each audio signal processing module has a fixed gain coefficient. After the system determines the required gain coefficient through calculation, it determines the audio signal processing module to be used through comparison, and then calls the determined audio signal processing module to implement gain processing of the audio signal.

[0075] In another embodiment, the method further comprises:

[0076] S9: performing filtering processing on the target audio signals generated by each of the audio signal processing modules based on different filtering algorithms.

[0077] In this embodiment, the system applies a matching filtering algorithm to the target audio signals output by each audio signal processing module, filtering the target audio signals before inputting them into the audio signal synthesis module for synthesis. Alternatively, the system can determine the bands to be filtered based on new user input, or independently analyze the sound effect information input by the user to determine the bands to be filtered. The system then selects a matching filtering algorithm based on the determined results to filter different target audio signals.

[0078] Another embodiment of the present invention further provides an audio signal processing device, comprising:

[0079] a first determining module, configured to determine, in response to an input instruction obtained, gain information about a homologous analog signal based on the input instruction;

[0080] A second determining module, configured to determine an audio signal processing module to be called based on the gain information;

[0081] a control module, configured to input the audio signal into each of the audio signal processing modules, and control each of the audio signal processing modules to perform different gain processing on the obtained audio signals based on the gain information, thereby obtaining multiple target audio signals;

[0082] a processing module, configured to synthesize the target audio signals of the plurality of channels to generate a wide dynamic range signal corresponding to the audio signals;

[0083] The encoding module is used to encode the wide dynamic range signal and send it to the target device for output.

[0084] In one embodiment, the gain signal includes a frequency band for which the audio signal needs to be amplified and a volume value corresponding to the frequency band after amplification;

[0085] The determining of the audio signal processing module to be called based on the gain information includes:

[0086] The audio signal processing module to be called is determined based on the frequency band that needs to be amplified.

[0087] In one embodiment, controlling each of the audio signal processing modules to perform different gain processing on the obtained audio signals based on the gain information includes:

[0088] determining a gain coefficient based on the frequency band and the corresponding volume value;

[0089] The audio signal processing modules are controlled to perform different gain processing on the obtained audio signals based on corresponding gain coefficients.

[0090] In one embodiment, the method further comprises:

[0091] The filtering module is used to perform filtering processing on the target audio signals generated by each of the audio signal processing modules based on different filtering algorithms.

[0092] Furthermore, an embodiment of the present invention further provides a storage medium storing a computer program, which, when executed by a processor, implements the audio signal processing method described above. It should be understood that each solution in this embodiment has the corresponding technical effects of the above-described method embodiment, and will not be further described here.

[0093] Furthermore, an embodiment of the present invention also provides a computer program product, which is tangibly stored on a computer-readable medium and includes computer-readable instructions. When the computer-executable instructions are executed, at least one processor performs the audio signal processing method in the embodiment described above.

[0094] It should be noted that the computer storage medium of the present invention may be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. Computer-readable media may, for example, be, but are not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems, or devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to, an electrical connection having one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage medium, a magnetic storage medium, or any suitable combination thereof. In the present invention, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. In the present invention, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries computer-readable program code. This propagated data signal may take a variety of forms, including, but not limited to, electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program configured for use by or in conjunction with an instruction execution system, system, or device. Program code embodied on a computer-readable medium may be transmitted using any suitable medium, including but not limited to wireless, antenna, optical cable, RF, or any suitable combination thereof.

[0095] In addition, it will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer-usable program code.

[0096] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A system that specifies the functions of a box or boxes.

[0097] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the electronic device to which the above-described data processing method is applied can refer to the corresponding description in the aforementioned product embodiment and will not be repeated here.

[0098] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the spirit and scope of protection of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present invention.

Claims

1. An audio signal processing device, characterized in that include: The audio signal processing modules include a plurality of audio signal processing modules, wherein the plurality of audio signal processing modules are used to perform different gain processing on the same source audio signal to obtain multiple target audio signals, each target audio signal being different from the other; An audio signal synthesis module, configured to synthesize multiple target audio signals to generate a wide dynamic range signal corresponding to the audio signal; The encoder is used to encode the wide dynamic range signal, and the encoded wide dynamic range signal is used to be sent to a target device for output.

2. The audio signal processing device according to claim 1, wherein The audio signal processing module is an analog-to-digital conversion module.

3. The audio signal processing device according to claim 1, wherein The multiple audio signal processing modules perform different gain processing on the audio signal of the same source based on different gain coefficients.

4. The audio signal processing device according to claim 3, characterized in that A signal frequency band that needs to be amplified and a target volume value that the target frequency band is required to reach are determined, and the gain coefficient is determined based on the corresponding signal frequency band and target volume value.

5. The audio signal processing device according to claim 1, wherein The wide dynamic range signal is a floating point wide dynamic range signal, and the encoder is an encoder that supports encoding the floating point wide dynamic range signal.

6. The audio signal processing device according to claim 1, wherein The audio signal processing module further includes a filtering module, which is used to perform filtering processing on the target audio signal generated by the audio signal processing module. The filtering modules of different audio signal processing modules are the same or different.

7. An audio signal processing method, characterized in that: include: In response to the obtained input instruction, determining gain information about the audio signal of the same source based on the input instruction; Determining an audio signal processing module to be called based on the gain information; Inputting the audio signal into each of the audio signal processing modules, and controlling each of the audio signal processing modules to perform different gain processing on the obtained audio signals based on the gain information, to obtain multiple target audio signals; Performing synthesis processing on the multiple target audio signals to generate wide dynamic range signals corresponding to the audio signals; The wide dynamic range signal is encoded and sent to a target device for output.

8. The audio signal processing method according to claim 7, wherein: The gain information includes a frequency band for which gain is required for the audio signal and a volume value corresponding to the frequency band after gain; The determining of the audio signal processing module to be called based on the gain information includes: The audio signal processing module to be called is determined based on the frequency band that needs to be amplified.

9. The audio signal processing method according to claim 8, wherein: The controlling each of the audio signal processing modules to perform different gain processing on the obtained audio signals based on the gain information includes: determining a gain coefficient based on the frequency band and the corresponding volume value; The audio signal processing modules are controlled to perform different gain processing on the obtained audio signals based on corresponding gain coefficients.

10. The audio signal processing method according to claim 7, wherein: The method further comprises: The target audio signals generated by each of the audio signal processing modules are filtered based on different filtering algorithms.

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