CN109003622B - Noise reduction processing method and device, radio and vehicle - Google Patents
Noise reduction processing method and device, radio and vehicle Download PDFInfo
- Publication number
- CN109003622B CN109003622B CN201811060471.6A CN201811060471A CN109003622B CN 109003622 B CN109003622 B CN 109003622B CN 201811060471 A CN201811060471 A CN 201811060471A CN 109003622 B CN109003622 B CN 109003622B
- Authority
- CN
- China
- Prior art keywords
- preset
- preset threshold
- audio signal
- intensity
- attenuation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0316—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0316—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude
- G10L21/0324—Details of processing therefor
Abstract
The invention relates to a noise reduction processing method and device, a radio and a vehicle, and belongs to the technical field of data processing. The noise reduction processing method comprises the following steps: acquiring preset parameters in a received audio signal; and when the preset parameter is determined to meet a first preset threshold value, attenuating the current output intensity of the audio signal to an attenuation intensity corresponding to the preset parameter in a preset intensity attenuation table, wherein the preset intensity attenuation table comprises a corresponding relation between the preset parameter of the audio signal and the preset attenuation intensity. In this embodiment, when the preset parameter in the acquired audio signal satisfies the first preset threshold, the output intensity of the audio signal is attenuated, that is, the output volume of the audio signal is attenuated, so as to achieve the purpose of reducing noise.
Description
Technical Field
The invention belongs to the technical field of data processing, and particularly relates to a noise reduction processing method and device, a radio and a vehicle.
Background
With the rapid development of modern automobile electronic technology, the electronic module in the automobile forms a complete system. The radio reception is a standard function of a vehicle-mounted system, the frequency of the radio reception used by a user is very high, but the interference noise is a common problem of the radio reception and is very headache.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for noise reduction, a radio and a vehicle, so as to effectively solve the above problems.
The embodiment of the invention is realized by the following steps:
in a first aspect, an embodiment of the present invention provides a noise reduction processing method, including: acquiring preset parameters in a received audio signal; and when the preset parameter is determined to meet a first preset threshold value, attenuating the current output intensity of the audio signal to an attenuation intensity corresponding to the preset parameter in a preset intensity attenuation table, wherein the preset intensity attenuation table comprises a corresponding relation between the preset parameter of the audio signal and the preset attenuation intensity. In this embodiment, when the preset parameter in the acquired audio signal satisfies the first preset threshold, the output intensity of the audio signal is attenuated, that is, the output volume of the audio signal is attenuated, so as to achieve the purpose of reducing noise.
With reference to an optional implementation manner of the first aspect, when the preset parameter is an adjacent channel noise ratio or a multipath interference noise ratio, the method further includes: when the adjacent channel noise occupation ratio or the multipath interference noise occupation ratio is determined to meet a second preset threshold, converting the audio signal into a single-channel signal and outputting the single-channel signal; wherein the second preset threshold is greater than the first preset threshold. In this embodiment, when the adjacent channel noise ratio or the multipath interference noise ratio satisfies the second preset threshold, the output volume of the audio signal is attenuated, and the audio signal is converted into a mono signal for output.
With reference to still another optional implementation manner of the first aspect, when the preset parameter is an adjacent channel noise fraction or a multipath interference noise fraction, the method further includes: filtering out signals of which the frequency is not lower than a third preset threshold value in the audio signals; or filtering out signals with the frequency not lower than the third preset threshold value and filtering out signals with the frequency not higher than the fourth preset threshold value in the audio signals; wherein the third preset threshold is greater than the fourth preset threshold. In this embodiment, when the adjacent channel noise ratio or the multipath interference noise ratio in the acquired audio signal satisfies the first preset threshold, the noise reduction effect is improved by combining a noise reduction mode of attenuating a high frequency or an high frequency and an low frequency in addition to attenuating the output volume of the audio signal, so as to achieve the purpose of reducing noise better.
With reference to still another optional implementation manner of the first aspect, when the preset parameter is a modulation degree, before the current output intensity of the audio signal is attenuated to an attenuation intensity corresponding to the preset parameter in a preset intensity attenuation table, the method further includes: when the modulation degree is determined to meet a fifth preset threshold, filtering out signals with the frequency not lower than a third preset threshold or filtering out signals with the frequency not lower than the third preset threshold and filtering out signals with the frequency not higher than a fourth preset threshold from the audio signals; wherein the fifth preset threshold is greater than the first preset threshold. In this embodiment, noise is reduced from the dimension of the modulation degree, and when the modulation degree satisfies the fifth preset threshold, in addition to attenuating the output volume of the audio signal, the noise reduction effect is improved by combining a noise reduction method of attenuating a high frequency or attenuating a high frequency and attenuating a low frequency, so as to achieve the purpose of reducing noise better.
In combination with yet another optional implementation of the first aspect, the method further comprises: when the modulation degree is determined to meet a sixth preset threshold value, converting the audio signal into a single-channel signal and outputting the single-channel signal; wherein the sixth preset threshold is greater than the fifth preset threshold. In this embodiment, when the noise is reduced from the dimension of the modulation degree, when the modulation degree satisfies the sixth preset threshold, the output volume of the audio signal is attenuated, and the audio signal is converted into a mono signal to be output.
In combination with yet another optional implementation of the first aspect, the method further comprises: acquiring the signal intensity of the audio signal; and when the signal intensity is determined not to be higher than a seventh preset threshold value, converting the audio signal into a single-channel signal to be output. In this embodiment, the noise may also be reduced from the dimension of the signal strength, and when the signal strength of the audio signal is not higher than the seventh preset threshold, the audio signal is converted into a mono signal to be output, so as to achieve the purpose of reducing the noise.
In a second aspect, an embodiment of the present invention provides a noise reduction processing apparatus, including: the device comprises an acquisition module and an attenuation module; the acquisition module is used for acquiring preset parameters in the received audio signals; and the attenuation module is used for attenuating the current output intensity of the audio signal to the attenuation intensity corresponding to the preset parameter in a preset intensity attenuation table when the preset parameter meets a first preset threshold value, wherein the preset intensity attenuation table comprises the corresponding relation between the preset parameter of the audio signal and the preset attenuation intensity.
With reference to the second aspect, in an optional implementation manner, when the preset parameter is an adjacent channel noise ratio or a multipath interference noise ratio, the apparatus further includes: the conversion module is used for converting the audio signal into a single-channel signal to be output when the adjacent channel noise ratio or the multipath interference noise ratio is determined to meet a second preset threshold value; wherein the second preset threshold is greater than the first preset threshold.
With reference to the second aspect, in yet another optional implementation manner, when the preset parameter is an adjacent channel noise ratio or a multipath interference noise ratio, the apparatus further includes a filtering module, configured to filter a signal with a frequency not lower than a third preset threshold in the audio signal; or filtering out signals with the frequency not lower than the third preset threshold value and filtering out signals with the frequency not higher than the fourth preset threshold value in the audio signals; wherein the third preset threshold is greater than the fourth preset threshold.
In combination with yet another optional implementation manner of the second aspect, when the preset parameter is a modulation degree, the filtering module is further configured to, when it is determined that the modulation degree satisfies a fifth preset threshold, filter a signal of the audio signal whose frequency is not lower than a third preset threshold, or filter a signal of the audio signal whose frequency is not lower than the third preset threshold, and filter a signal of the audio signal whose frequency is not higher than a fourth preset threshold; wherein the fifth preset threshold is greater than the first preset threshold.
With reference to the second aspect, in yet another optional implementation manner, when the preset parameter is a modulation degree, the converting module is further configured to convert the audio signal into a mono signal and output the mono signal when it is determined that the modulation degree satisfies a sixth preset threshold; wherein the sixth preset threshold is greater than the fifth preset threshold.
In combination with yet another optional implementation manner of the second aspect, the obtaining module is further configured to obtain a signal strength of the audio signal; the conversion module is further configured to convert the audio signal into a mono signal to output when it is determined that the signal strength is not higher than a seventh preset threshold.
In a third aspect, an embodiment of the present invention further provides a radio, including: a memory and a processor, the memory and the processor connected; the memory is used for storing programs; the processor is configured to invoke a program stored in the memory to perform the first aspect and/or a method provided in connection with an optional implementation of the first aspect.
In a fourth aspect, the embodiment of the present invention further provides a vehicle, which is characterized by comprising a body and the radio receiver provided in the third aspect and arranged in the body.
In a fifth aspect, an embodiment of the present invention further provides a storage medium, on which a computer program is stored, where the computer program is executed by a processor to perform the method of the first aspect and/or the method provided in connection with an optional implementation manner of the first aspect.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
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. The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings. Like reference numerals refer to like parts throughout the drawings. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.
Fig. 1 shows a schematic structural diagram of a radio receiver according to an embodiment of the present invention.
Fig. 2 shows a flowchart of a noise reduction processing method according to an embodiment of the present invention.
Fig. 3 is a flowchart illustrating a further noise reduction processing method according to an embodiment of the present invention.
Fig. 4 shows a block schematic diagram of a noise reduction processing apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "first", "second", "third", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance. Further, the term "and/or" in the present application is only one kind of association relationship describing the associated object, and means that three kinds of relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone.
First embodiment
As shown in fig. 1, fig. 1 is a block diagram illustrating a radio receiver 100 according to an embodiment of the present invention. The radio receiver 100 includes: the noise reduction processing apparatus 110, the memory 120, the memory controller 130, and the processor 140. The radio 100 in this embodiment is applied to a vehicle-mounted system.
The memory 120, the memory controller 130, and the processor 140 are electrically connected to each other directly or indirectly to realize data transmission or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines. The noise reduction processing device 110 includes at least one software function module which can be stored in the memory 120 in the form of software or firmware (firmware) or solidified in an Operating System (OS) of the radio receiver 100. The processor 140 is configured to execute an executable module stored in the memory 120, such as a software functional module or a computer program included in the noise reduction processing apparatus 110.
The Memory 120 may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and the like. The memory 120 is used for storing a program, and the processor 140 executes the program after receiving an execution instruction, and a method executed by the radio receiver 100 defined by a flow disclosed in any embodiment of the invention described later can be applied to the processor 140, or implemented by the processor 140.
The processor 140 may be an integrated circuit chip having signal processing capabilities. The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
Second embodiment
Referring to fig. 2, steps included in a noise reduction method applied to the radio receiver 100 according to an embodiment of the present invention will be described with reference to fig. 2.
Step S101: and acquiring preset parameters in the received audio signal.
After receiving an audio signal sent by a radio station, the radio acquires a preset parameter in the audio signal, where the preset parameter may be any one or any combination of an adjacent channel noise ratio, a multipath interference noise ratio, and a modulation degree. The adjacent frequency noise occupation ratio is the occupation ratio of the adjacent frequency noise to the whole signal; the multipath interference noise ratio refers to the ratio of multipath interference noise to the whole signal; the modulation degree is a ratio of a modulation wave amplitude to a carrier wave amplitude, that is, a ratio representing a radio station sound.
Step S102: and when the preset parameter is determined to meet a first preset threshold value, attenuating the current output intensity of the audio signal to an attenuation intensity corresponding to the preset parameter in a preset intensity attenuation table.
When the preset parameter is determined to meet the first preset threshold, the current output intensity of the audio signal is attenuated to the attenuation intensity corresponding to the preset parameter in the preset intensity attenuation table, that is, when the preset parameter in the acquired audio signal meets the first preset threshold, the output intensity of the audio signal is attenuated, that is, the output volume of the audio signal is attenuated, so that the purpose of reducing noise is achieved.
The first preset threshold is preset, and the thresholds corresponding to different preset parameters may be different, for example, when the preset parameter is an adjacent channel noise ratio or a multipath interference noise ratio, the first preset threshold may be 20%, at this time, when the adjacent channel noise ratio or the multipath interference noise ratio is not less than 20%, that is, when the adjacent channel noise content is greater than or equal to 20% or the multipath interference noise content is greater than or equal to 20%, the output intensity of the audio signal is attenuated, that is, the output volume of the audio signal is attenuated, so as to achieve the purpose of reducing noise. For another example, when the preset parameter is a modulation degree, the first preset threshold may be 10%, and when the modulation degree is not greater than 10%, that is, the radio station sound ratio is less than 10%, the output intensity of the audio signal is attenuated, that is, the output volume of the audio signal is attenuated, so as to achieve the purpose of reducing noise.
The attenuation amplitude of the output volume of the attenuated audio signal depends on the attenuation intensity of the preset parameter of the audio signal in the preset intensity attenuation table, and taking the modulation degree not greater than 10% as an example, the smaller the modulation degree, the larger the attenuation amplitude is, the smaller the output sound is; taking the adjacent channel noise ratio or the multipath interference noise ratio as an example, the higher the ratio is, the larger the attenuation amplitude is, and the smaller the output sound is.
The preset intensity attenuation table comprises a corresponding relation between a preset parameter of the audio signal and preset attenuation intensity. For example, a modulation degree of 30% for an attenuation amplitude corresponding to 8-10%; the modulation degree is 6-8%, and the corresponding attenuation amplitude is 40%; the modulation degree is 4-6%, and the corresponding attenuation amplitude is 50%; the modulation degree is 3%, and the corresponding attenuation amplitude is 60%. It should be noted that the correspondence relationship shown in the present embodiment is merely an example for facilitating understanding, and is not to be construed as a limitation of the present application.
When the preset parameter is the adjacent channel noise ratio or the multipath interference noise ratio, the method further comprises the following steps: and converting the audio signal into a single-channel signal for outputting when the adjacent channel noise ratio or the multipath interference noise ratio is determined to meet a second preset threshold value. The second preset threshold is preset, and the second preset threshold is greater than the first preset threshold, and may be, for example, 30%. That is to say, when the adjacent channel noise ratio or the multipath interference noise ratio is not less than 30%, that is, the adjacent channel noise content is greater than or equal to 30% or the multipath interference noise content is greater than or equal to 30%, at this time, the output intensity of the audio signal is attenuated, and the audio signal is converted into a mono signal to be output, and two noise reduction means are adopted to improve the noise reduction effect, so as to achieve the purpose of reducing the noise better.
Optionally, when the preset parameter is an adjacent channel noise ratio or a multipath interference noise ratio, the method further includes: filtering out signals of which the frequency is not lower than a third preset threshold value in the audio signals; or filtering out signals with the frequency not lower than the third preset threshold value and filtering out signals with the frequency not higher than the fourth preset threshold value in the audio signals; wherein the third preset threshold is greater than the fourth preset threshold. Wherein, the third preset threshold is preset, and may be set to 7KHz, for example; similarly, the fourth predetermined threshold is also predetermined and smaller than the third predetermined threshold, and may be, for example, 200Hz, i.e. 0.2 KHz. That is, when the preset parameter is the adjacent channel noise ratio or the multipath interference noise ratio and satisfies the first preset threshold, for example, not less than 20%, in this case, in addition to attenuating the output intensity of the audio signal, the noise reduction effect is improved by combining a noise reduction method of attenuating a high frequency or attenuating a high frequency and attenuating a low frequency, so as to achieve the purpose of reducing noise better.
It can be understood that, when the adjacent channel noise ratio or the multipath interference noise ratio satisfies the second preset threshold, for example, not less than 30%, the output intensity of the audio signal may be attenuated and the audio signal may be converted into a monaural signal to be output, and the noise reduction effect may be improved by combining a noise reduction method of attenuating a high frequency or attenuating a high frequency and attenuating a low frequency, that is, three noise reduction means are adopted to improve the noise reduction effect, so as to achieve the purpose of reducing noise better.
Optionally, when the preset parameter is a modulation degree, before the current output intensity of the audio signal is attenuated to an attenuation intensity corresponding to the preset parameter in a preset intensity attenuation table, the method further includes: and when the modulation degree is determined to meet a fifth preset threshold, filtering out signals of which the frequency is not lower than a third preset threshold or filtering out signals of which the frequency is not lower than the third preset threshold and filtering out signals of which the frequency is not higher than a fourth preset threshold from the audio signals. The fifth preset threshold is preset, and the fifth preset threshold is greater than the first preset threshold, for example, the fifth preset threshold may be 25%. That is, when the modulation degree is not greater than 25%, for example, 20%, the signals with frequencies not lower than the third preset threshold value in the audio signals are filtered, or the signals with frequencies not lower than the third preset threshold value in the audio signals are filtered, and the signals with frequencies not higher than the fourth preset threshold value in the audio signals are filtered, that is, the noise reduction effect is improved by attenuating high frequencies or attenuating high frequencies and attenuating low frequencies.
Optionally, when the preset parameter is a modulation degree, the method further includes: and when the modulation degree is determined to meet a sixth preset threshold value, converting the audio signal into a single-channel signal and outputting the single-channel signal. The sixth preset threshold is preset, and the sixth preset threshold is greater than the fifth preset threshold, for example, the sixth preset threshold may be 30%. That is, when the modulation degree is not more than 30%, for example, 28%, the audio signal is converted into a mono signal and output.
Alternatively, in converting the audio signal into a mono signal for output, other parameters different from the preset parameters, such as signal strength, may be considered in addition to the threshold value being satisfied based on the preset parameters. At this time, the method further includes the steps shown in fig. 3. The following will be explained with reference to the steps shown in fig. 3.
Step S201: and acquiring the signal strength of the audio signal.
Step S202: and when the signal intensity is determined not to be higher than a seventh preset threshold value, converting the audio signal into a single-channel signal to be output.
And after the signal intensity of the audio signal is acquired, judging whether the signal intensity is not higher than a seventh preset threshold value, and if the signal intensity is not higher than the seventh preset threshold value, converting the audio signal into a single-channel signal and outputting the single-channel signal. The seventh preset threshold is preset, and taking the stereo lighting sensitivity as 15dB as an example, the seventh preset threshold may be set to 20dB, that is, the signal strength is lower than 20dB and needs to be switched to mono output.
In addition, as an optional implementation manner, the purpose of noise reduction can be achieved by modifying the frequency domain response of the received sound, because the received sound is mostly high-frequency noise, the principle of the method is to reduce the response range of the high-frequency part in the frequency domain response of the received sound so as to achieve the purpose of noise reduction. The high frequency part reduces the high frequency noise naturally. The high-frequency part for reducing the radio frequency domain response can be realized by software filtering, and can also be realized by setting a register, namely, the change of the control strategy is realized by changing the configuration parameters of the register, so that the frequency range is controlled to be output from 200Hz to 7 KHz.
Third embodiment
The embodiment of the present application further provides a noise reduction processing apparatus 110, as shown in fig. 4. The noise reduction processing apparatus 110 includes: an acquisition module 111, an attenuation module 112, a conversion module 113, and a filtering module 114.
The obtaining module 111 is configured to obtain a preset parameter in the received audio signal. Optionally, the obtaining module 111 is further configured to obtain a signal strength of the audio signal.
An attenuation module 112, configured to attenuate, when it is determined that the preset parameter meets a first preset threshold, the current output intensity of the audio signal to an attenuation intensity corresponding to the preset parameter in a preset intensity attenuation table, where the preset intensity attenuation table includes a correspondence between the preset parameter of the audio signal and the preset attenuation intensity.
When the preset parameter is the adjacent frequency noise ratio or the multipath interference noise ratio:
a conversion module 113, configured to convert the audio signal into a mono signal and output the mono signal when it is determined that the adjacent channel noise ratio or the multipath interference noise ratio satisfies a second preset threshold; wherein the second preset threshold is greater than the first preset threshold.
A filtering module 114, configured to filter a signal with a frequency not lower than a third preset threshold from the audio signal; or filtering out signals with the frequency not lower than the third preset threshold value and filtering out signals with the frequency not higher than the fourth preset threshold value in the audio signals; wherein the third preset threshold is greater than the fourth preset threshold.
When the preset parameter is a modulation degree:
the filtering module 114 is further configured to, when it is determined that the modulation degree satisfies a fifth preset threshold, filter a signal of which frequency is not lower than a third preset threshold in the audio signal, or filter a signal of which frequency is not lower than the third preset threshold in the audio signal, and filter a signal of which frequency is not higher than the fourth preset threshold in the audio signal; wherein the fifth preset threshold is greater than the first preset threshold.
The conversion module 113 is further configured to convert the audio signal into a mono signal to be output when it is determined that the modulation degree meets a sixth preset threshold; wherein the sixth preset threshold is greater than the fifth preset threshold. Optionally, the converting module 113 is further configured to convert the audio signal into a mono signal to be output when it is determined that the signal strength is not higher than a seventh preset threshold.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
It should be noted that, as those skilled in the art can clearly understand, for convenience and brevity of description, the specific working process of the apparatus described above may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.
Fourth embodiment
Embodiments of the present invention also provide a vehicle, which includes a body and a radio receiver 100 as shown in fig. 1. It is understood that when the radio receiver 100 is integrated on the body of the vehicle, the memory 120, the memory controller 130, and the processor 140 in the radio receiver 100 may share the corresponding devices (such as the memory, the memory controller, and the processor) in the control center of the vehicle, and in this case, the memory 120, the memory controller 130, and the processor 140 are not separately provided for the radio receiver 100.
Fifth embodiment
The embodiment of the invention also provides a storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps included in the noise reduction processing method are executed. For specific implementation, reference may be made to the method embodiment, which is not described herein again.
Specifically, the storage medium can be a general-purpose storage medium, such as a removable disk, a hard disk, or the like, and when the program code on the storage medium is executed, the noise reduction processing method shown in the above embodiments can be executed, so as to achieve the purpose of reducing noise.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a notebook computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk. It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A noise reduction processing method, comprising:
acquiring preset parameters in a received audio signal, wherein the preset parameters comprise any one or any combination of an adjacent channel noise ratio, a multipath interference noise ratio and a modulation degree;
when the preset parameter is determined to meet a first preset threshold value, attenuating the current output intensity of the audio signal to an attenuation intensity corresponding to the preset parameter in a preset intensity attenuation table, wherein the preset intensity attenuation table comprises a corresponding relation between the preset parameter of the audio signal and the preset attenuation intensity; the attenuation amplitude depends on the corresponding attenuation intensity of the preset parameters of the audio signal in the preset intensity attenuation table;
when the preset parameter is the adjacent channel noise ratio or the multipath interference noise ratio, the method further comprises the following steps:
when the adjacent channel noise occupation ratio or the multipath interference noise occupation ratio is determined to meet a second preset threshold, converting the audio signal into a single-channel signal and outputting the single-channel signal; wherein the second preset threshold is greater than the first preset threshold;
when the preset parameter is a modulation degree, before the current output intensity of the audio signal is attenuated to the attenuation intensity corresponding to the preset parameter in a preset intensity attenuation table, the method further includes:
when the modulation degree is determined to meet a fifth preset threshold, filtering out signals of which the frequency is not lower than a third preset threshold in the audio signals, or filtering out signals of which the frequency is not lower than the third preset threshold in the audio signals, and filtering out signals of which the frequency is not higher than a fourth preset threshold in the audio signals; the fifth preset threshold is greater than the first preset threshold, and the third preset threshold is greater than the fourth preset threshold.
2. The method according to claim 1, wherein when the preset parameter is an adjacent channel noise ratio or a multipath interference noise ratio, the method further comprises:
filtering out signals of which the frequency is not lower than a third preset threshold value in the audio signals; or
Filtering out signals with the frequency not lower than the third preset threshold value and filtering out signals with the frequency not higher than the fourth preset threshold value in the audio signals; wherein the third preset threshold is greater than the fourth preset threshold.
3. The method of claim 1, further comprising:
when the modulation degree is determined to meet a sixth preset threshold value, converting the audio signal into a single-channel signal and outputting the single-channel signal; wherein the sixth preset threshold is greater than the fifth preset threshold.
4. The method of claim 1, further comprising:
acquiring the signal intensity of the audio signal;
and when the signal intensity is determined not to be higher than a seventh preset threshold value, converting the audio signal into a single-channel signal to be output.
5. A noise reduction processing apparatus, characterized by comprising:
the device comprises an acquisition module, a processing module and a processing module, wherein the acquisition module is used for acquiring preset parameters in a received audio signal, and the preset parameters comprise any one or any combination of an adjacent channel noise ratio, a multipath interference noise ratio and a modulation degree;
the attenuation module is used for attenuating the current output intensity of the audio signal to an attenuation intensity corresponding to the preset parameter in a preset intensity attenuation table when the preset parameter is determined to meet a first preset threshold value, wherein the preset intensity attenuation table comprises a corresponding relation between the preset parameter of the audio signal and the preset attenuation intensity; the attenuation amplitude depends on the corresponding attenuation intensity of the preset parameters of the audio signal in the preset intensity attenuation table;
when the preset parameter is the adjacent channel noise occupation ratio or the multipath interference noise occupation ratio, the device further comprises:
the conversion module is used for converting the audio signal into a single-channel signal to be output when the adjacent channel noise ratio or the multipath interference noise ratio is determined to meet a second preset threshold value; wherein the second preset threshold is greater than the first preset threshold;
when the preset parameter is a modulation degree, the device further comprises:
a filtering module, configured to, before the attenuation module attenuates the current output intensity of the audio signal to an attenuation intensity corresponding to the preset parameter in a preset intensity attenuation table, filter a signal of the audio signal whose frequency is not lower than a third preset threshold, or filter a signal of the audio signal whose frequency is not lower than the third preset threshold, and filter a signal of the audio signal whose frequency is not higher than a fourth preset threshold when it is determined that the modulation degree satisfies a fifth preset threshold; the fifth preset threshold is greater than the first preset threshold, and the third preset threshold is greater than the fourth preset threshold.
6. A radio receiver, comprising: a memory and a processor, the memory and the processor connected;
the memory is used for storing programs;
the processor is to invoke a program stored in the memory to perform the method of any of claims 1-4.
7. A vehicle comprising a body and the radio receiver of claim 6 disposed within the body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811060471.6A CN109003622B (en) | 2018-09-11 | 2018-09-11 | Noise reduction processing method and device, radio and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811060471.6A CN109003622B (en) | 2018-09-11 | 2018-09-11 | Noise reduction processing method and device, radio and vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109003622A CN109003622A (en) | 2018-12-14 |
| CN109003622B true CN109003622B (en) | 2021-06-04 |
Family
ID=64591005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811060471.6A Active CN109003622B (en) | 2018-09-11 | 2018-09-11 | Noise reduction processing method and device, radio and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109003622B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111009251B (en) * | 2019-10-31 | 2023-04-18 | 惠州华阳通用电子有限公司 | Vehicle-mounted sound mixing method and device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472141A (en) * | 2013-09-09 | 2013-12-25 | 北京工业大学 | Signal demodulation method for recognizing vibrant noise modulation mechanism |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3221280B2 (en) * | 1995-05-16 | 2001-10-22 | 松下電器産業株式会社 | Multipath noise reduction device |
| US6115589A (en) * | 1997-04-29 | 2000-09-05 | Motorola, Inc. | Speech-operated noise attenuation device (SONAD) control system method and apparatus |
| JP3963747B2 (en) * | 2002-03-20 | 2007-08-22 | 三洋電機株式会社 | Signal processing apparatus, signal receiving apparatus, and signal processing method |
| JP2004129162A (en) * | 2002-10-07 | 2004-04-22 | Pioneer Electronic Corp | Receiving method and receiver |
| JP4263123B2 (en) * | 2004-03-23 | 2009-05-13 | 三洋電機株式会社 | Signal processing circuit |
| US7729680B2 (en) * | 2004-11-02 | 2010-06-01 | Panasonic Corporation | Noise suppresser |
| US20060223467A1 (en) * | 2005-04-05 | 2006-10-05 | Nokia Corporation | Method and device for low-power FM transmission of audio data to RDS (Radio Data System) capable FM radio receiver |
| CN101965044B (en) * | 2009-07-22 | 2013-07-03 | 中兴通讯股份有限公司 | Reverse power control method, system and device for resisting power saturation |
| US8473287B2 (en) * | 2010-04-19 | 2013-06-25 | Audience, Inc. | Method for jointly optimizing noise reduction and voice quality in a mono or multi-microphone system |
| CN102186132A (en) * | 2010-12-30 | 2011-09-14 | 成都天奥信息科技有限公司 | Digital squelch method |
| CN202385253U (en) * | 2011-11-09 | 2012-08-15 | 姜文音 | Built-in noise reduction earphone for AM/FM radio set |
| US9130643B2 (en) * | 2012-01-31 | 2015-09-08 | Broadcom Corporation | Systems and methods for enhancing audio quality of FM receivers |
| CN103906118B (en) * | 2012-12-25 | 2017-08-08 | 中国移动通信集团湖北有限公司 | A kind of wlan network terminal uplink interference estimation method and device |
| CN104637489B (en) * | 2015-01-21 | 2018-08-21 | 华为技术有限公司 | The method and apparatus of sound signal processing |
| CN105721004B (en) * | 2016-04-15 | 2019-03-29 | 智车优行科技（北京）有限公司 | Vehicle-mounted radio control method, device, vehicle-mounted radio and vehicle |
| CN106992828B (en) * | 2017-06-01 | 2023-11-21 | 上海埃威航空电子有限公司 | Marine intermediate frequency digital broadcasting system |
| CN107896356B (en) * | 2017-10-27 | 2020-03-03 | 广州小鹏汽车科技有限公司 | Audio control method and system of FM control system |
| CN107749306B (en) * | 2017-10-31 | 2020-01-21 | 维沃移动通信有限公司 | Vibration optimization method and mobile terminal |
-
2018
- 2018-09-11 CN CN201811060471.6A patent/CN109003622B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472141A (en) * | 2013-09-09 | 2013-12-25 | 北京工业大学 | Signal demodulation method for recognizing vibrant noise modulation mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109003622A (en) | 2018-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6178314B1 (en) | Radio receiver with adaptive bandwidth controls at intermediate frequency and audio frequency sections | |
| EP0887944A2 (en) | Digital processing radio receiver | |
| WO1998030009A3 (en) | An ac-center clipper for noise and echo suppression in a communications system | |
| US8526622B2 (en) | Configurable filter for processing television audio signals | |
| CN100517987C (en) | Signal processing circuit | |
| US10567697B2 (en) | Signal processing device and signal processing method | |
| CN109003622B (en) | Noise reduction processing method and device, radio and vehicle | |
| CN102369705B (en) | Signal processing method, device and system of communication system | |
| CN104284018A (en) | Terminal | |
| US9172483B2 (en) | Signal quality estimation and control | |
| JP6666725B2 (en) | Noise reduction device and noise reduction method | |
| JP4235175B2 (en) | Method and apparatus for processing amplitude modulated (AM) signals | |
| US10594346B2 (en) | Method for attenuating interference generated by intermodulation products | |
| CN107210766B (en) | Audio signal processing apparatus | |
| CN109802739B (en) | Broadcast frequency modulation method and device | |
| CN116094637B (en) | Emergency broadcast command signal identification method and system for medium wave amplitude modulation broadcast | |
| CN217445509U (en) | DSP power amplifier device and system for car audio | |
| US20050153674A1 (en) | Noise removal device | |
| CN115529053A (en) | Audio signal adjusting method and device, control chip and storage medium | |
| JPS6314513Y2 (en) | ||
| JP3422484B2 (en) | Demodulation circuit and receiving device having the same | |
| CN108667758B (en) | Peak clipping method and device | |
| CN115348505A (en) | Audio volume adjusting method, device, medium and equipment | |
| CN117040568A (en) | Interference strength determining method and device and Bluetooth equipment | |
| JP2006253886A (en) | Receiver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |