CN115529053A - Audio signal adjusting method and device, control chip and storage medium - Google Patents
Audio signal adjusting method and device, control chip and storage medium Download PDFInfo
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Abstract
The invention discloses an audio signal adjusting method, an audio signal adjusting device, a control chip and a storage medium, wherein the adjusting method comprises the following steps: acquiring signal-to-noise ratios of audio signals of a first channel and a second channel; calculating a difference value of signal-to-noise ratios of the audio signals of the first channel and the second channel; and when the first signal-to-noise ratio is greater than the second signal-to-noise ratio and the difference value between the first signal-to-noise ratio and the second signal-to-noise ratio is greater than a preset value, copying the audio signal in the first sound channel into a second sound channel. The audio signal adjusting method, the device, the control chip and the storage medium provided by the invention can monitor the difference value of the signal-to-noise ratios of the first sound channel and the second sound channel, and copy the audio signal in the first sound channel into the second sound channel when the difference value of the signal-to-noise ratios of the audio signals of the first sound channel and the second sound channel is greater than the preset value, thereby effectively reducing the influence of interference factors in the audio playing process and improving the listening experience of a user.
Description
Technical Field
The invention belongs to the technical field of audio signal processing, and particularly relates to an audio signal adjusting method, an audio signal adjusting device, a control chip and a storage medium.
Background
With the popularization of automobiles, people spend more and more time on the automobiles, and a vehicle-mounted radio is a very widely applied way for obtaining information and entertainment in the driving process. The broadcasting stations in each city or region transmit the broadcasting programs with respective frequencies through the transmitters, and the user receives the programs transmitted by the broadcasting stations through the vehicle-mounted radio and selects the broadcasting programs which the user likes to listen to.
However, some programs in the broadcasting station are easy to have a condition that the noise of one channel is large, while the sound of other channels is completely normal, and if the programs are not processed, the condition that the noise is large on one side occurs when the vehicle-mounted radio broadcasts the broadcasting programs, so that the listening effect is not ideal.
Disclosure of Invention
In view of the above technical problems, the present invention provides an audio signal adjusting method, an audio signal adjusting device, a control chip, and a storage medium, so as to reduce the influence of interference factors during an audio playing process and improve the listening experience of a user.
The invention provides an audio signal adjusting method, which comprises the following steps of acquiring a first signal-to-noise ratio, wherein the first signal-to-noise ratio is the signal-to-noise ratio of an audio signal in a first sound channel; acquiring a second signal-to-noise ratio, wherein the second signal-to-noise ratio is the signal-to-noise ratio of the audio signal in the second channel; (ii) a And when the first signal-to-noise ratio is greater than the second signal-to-noise ratio and the difference value between the first signal-to-noise ratio and the second signal-to-noise ratio is greater than a preset value, copying the audio signal in the first sound channel into the second sound channel.
The invention also provides an audio signal conditioning device, comprising: the system comprises an acquisition module, a monitoring module and a copying module; the acquisition module is used for acquiring a first signal-to-noise ratio of the audio signal in the first sound channel and acquiring a second signal-to-noise ratio of the audio signal in the second sound channel; the monitoring module is used for calculating the difference value of the signal-to-noise ratios of the audio signals of the first sound channel and the second sound channel and monitoring the relation between the difference value of the signal-to-noise ratios and a preset value; the copying module is used for copying the audio signal in the first sound channel into the second sound channel when the first signal-to-noise ratio is larger than the second signal-to-noise ratio and the difference value between the first signal-to-noise ratio and the second signal-to-noise ratio is larger than a preset value.
The invention also provides a control chip, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes the steps of the adjusting method when executing the computer program.
The invention also provides a storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned adjustment method.
The audio signal adjusting method, the device, the control information and the storage medium provided by the invention can monitor the difference value of the signal-to-noise ratios of the first sound channel and the second sound channel, and copy the audio signal in the first sound channel into the second sound channel when the first signal-to-noise ratio is greater than the second signal-to-noise ratio and the difference value of the first signal-to-noise ratio and the second signal-to-noise ratio is greater than a preset value, thereby effectively reducing the influence of interference factors in the audio playing process and improving the listening experience of a user.
Drawings
FIG. 1 is a schematic flow chart of a conditioning method according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a second embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an adjusting device according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a control chip according to a fourth embodiment of the present invention.
Detailed Description
In the following description, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in the specification of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.
As used in this specification and the appended claims, the terms "if," if, "and" if "may be interpreted contextually as" when. Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
The technical scheme of the invention is further elaborated by combining the drawings and the specific embodiments in the specification.
Fig. 1 is a schematic flow chart of a conditioning method according to an embodiment of the present invention. As shown in fig. 1, the adjusting method of the present invention may include the steps of:
step S101: acquiring signal-to-noise ratios of audio signals of a first channel and a second channel;
optionally, obtaining the signal-to-noise ratio of the audio signals of the first channel and the second channel includes, but is not limited to, the following steps:
and acquiring the signal-to-noise ratio of the audio signal of the first sound channel corresponding to each frequency point in the preset time, and calculating the average value of the acquired signal-to-noise ratios to obtain the signal-to-noise ratio of the audio signal of the first sound channel.
Wherein, the first sound channel and the second sound channel comprise two or more different sound channels, such as: left, right, front, rear, etc.; for another example: front left channel, rear left channel, front right channel, rear right channel, etc.
Step S102: calculating a difference value of signal-to-noise ratios of the audio signals of the first channel and the second channel;
preferably, the difference in signal-to-noise ratio = high signal-to-noise ratio-low signal-to-noise ratio.
Step S103: and when the first signal-to-noise ratio is greater than the second signal-to-noise ratio and the difference value between the first signal-to-noise ratio and the second signal-to-noise ratio is greater than a preset value, copying the audio signal in the first sound channel into a second sound channel.
Illustratively, if the signal-to-noise ratio of the left channel is higher than that of the right channel, and the difference between the signal-to-noise ratios of the left channel and the right channel is greater than a preset value, the audio signal of the left channel is copied to the right channel, the audio signal with the originally low signal-to-noise ratio of the right channel is replaced and output from the right channel, and the audio signal output by the left channel is kept unchanged.
For example, if the signal-to-noise ratio of the left channel is higher than that of the right channel, the signal-to-noise ratio of the right channel is higher than that of the front channel, the difference between the signal-to-noise ratios of the left channel and the right channel is smaller than the preset value, and the difference between the signal-to-noise ratios of the right channel and the front channel is larger than the preset value, the audio signal of the left channel or the right channel can be selected to be copied to the front channel to replace the original audio signal with a low signal-to-noise ratio of the front channel to be output from the front channel, and the audio signals output by the left channel and the right channel are kept unchanged. And if the copying selection of the user is not obtained, copying the audio signal of the sound channel corresponding to the highest signal-to-noise ratio by default.
It is worth mentioning that the adjusting method provided by the invention further comprises the following steps:
acquiring a signal-to-noise ratio corresponding to each frequency point of an audio signal of a first sound channel in preset time;
acquiring a signal-to-noise ratio corresponding to each frequency point in a preset time of an audio signal of a second channel;
calculating the difference value of the signal-to-noise ratio corresponding to each frequency point of the first sound channel and the second sound channel in preset time;
and if the difference value of the signal-to-noise ratios of the audio signals of the first channel and the second channel corresponding to any frequency point is greater than a preset value, reducing the output volume of the second channel.
Thus, the influence of noise on the user is avoided by reducing the noise volume.
The adjusting method provided by the first embodiment of the invention can monitor the difference between the signal-to-noise ratios of the first channel and the second channel, and copy the audio signal in the first channel into the second channel when the difference between the signal-to-noise ratios of the first channel and the second channel is greater than a preset value, thereby effectively reducing the influence of interference factors in the audio playing process and improving the listening experience of a user.
Fig. 2 is a schematic flow chart of an adjustment method according to a second embodiment of the present invention. As shown in fig. 2, the adjusting method of the present invention may include the steps of:
step S201: acquiring a signal-to-noise ratio corresponding to each frequency point of audio signals of a first sound channel and a second sound channel in preset time;
step S202: (ii) a
Step S203: judging whether the difference value of the signal-to-noise ratios of the first sound channel and the second sound channel corresponding to any frequency point is larger than a preset value or not;
if the difference between the signal-to-noise ratios of the first channel and the second channel corresponding to any frequency point is greater than a preset value, executing step S204: performing gain adjustment on the audio signal of the second channel at the corresponding frequency point;
if the difference between the snr of the first channel and the snr of the second channel at any frequency point is smaller than or equal to a predetermined value, step S205 is executed: outputting the audio signal;
after the gain adjustment, step S206 is executed: judging whether the difference value of the signal-to-noise ratios of the first sound channel and the second sound channel corresponding to the frequency point is reduced below a preset value;
if the difference between the signal-to-noise ratios of the first channel and the second channel corresponding to the frequency point is reduced to be below a preset value, step S207 is executed: outputting the audio signal subjected to gain adjustment through a second channel;
if the difference between the snr values of the corresponding frequency points does not fall below the predetermined value, step S208 is executed: judging whether the difference value of the signal to noise ratios of the audio signals of the first sound channel and the second sound channel is larger than a preset value or not;
if the difference between the signal-to-noise ratios of the audio signals of the first channel and the second channel is less than or equal to a preset value, executing step S207;
if the difference between the signal-to-noise ratios of the audio signals of the first channel and the second channel is greater than the preset value, step S209 is executed: and copying the audio signal of the first channel to a channel corresponding to the low signal-to-noise ratio for output.
Optionally, the snr curves of the audio signals of the first channel and the second channel may be generated according to the snr obtained in step S201, and the calculation result in step S202 may be obtained more intuitively by using a method of comparing the snr curves of the audio signals of the first channel and the second channel.
According to the adjusting method provided by the second embodiment of the invention, when the difference value of the signal-to-noise ratios corresponding to the first channel and the second channel at any frequency point is greater than the preset value, the gain adjustment is firstly performed on the audio signal of the second channel, and then further measures are taken according to the effect of the gain adjustment, so that the influence of interference factors in the audio playing process is effectively reduced, and the listening experience of a user is comprehensively guaranteed.
Fig. 3 is a schematic structural diagram of an adjusting device according to a third embodiment of the present invention. As shown in fig. 3, the adjusting apparatus provided by the present invention includes an obtaining module 110, a monitoring module 111, and a copying module 112;
the obtaining module 110 is configured to obtain signal-to-noise ratios of audio signals of a first channel and a second channel; the monitoring module 111 is configured to calculate a difference between signal-to-noise ratios of the audio signals of the first channel and the second channel, and monitor a relationship between the difference between the signal-to-noise ratios and a preset value; the copying module 112 is configured to copy the audio signal in the first channel to the second channel when the difference between the signal-to-noise ratios is greater than a preset value.
In one embodiment, the adjusting means further comprises a gain adjusting module 113;
optionally, the gain adjustment module 113 performs gain adjustment on the audio signal of the second channel corresponding to the low snr at the corresponding frequency point when a difference between snrs corresponding to any frequency point of the audio signals of the first channel and the second channel in a preset time is greater than a preset value.
In other embodiments, the adjustment device further comprises a volume adjustment module 114;
optionally, the volume adjusting module 114 is configured to decrease the output volume of the second channel at a corresponding frequency point when a difference between signal-to-noise ratios corresponding to any frequency point of the audio signals of any two different channels of the first channel and the second channel in a preset time is greater than a preset value.
According to the adjusting device provided by the third embodiment of the invention, the influence of interference factors in the audio playing process is effectively reduced and the listening experience of a user is improved through division and cooperation of the acquisition module, the monitoring module, the copying module, the gain adjusting module and the volume adjusting module.
Fig. 4 is a schematic structural diagram of a control chip according to a fourth embodiment of the present invention. As shown in fig. 4, the control chip of this embodiment includes: a processor 210, a memory 211, and a computer program 212 stored in the memory 211 and executable on the processor 210. The processor 210, when executing the computer program 212, implements the steps in the various embodiments of the adjustment method described above, such as the steps S101 to S103 shown in fig. 1.
The control chip may include, but is not limited to, a processor 210, a memory 211. Those skilled in the art will appreciate that fig. 4 is merely an example of a control chip, and does not constitute a limitation of the control chip, and may include more or less components than those shown, or combine some components, or different components, for example, the control chip may further include input and output devices, network access devices, buses, etc.
The Processor 210 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 211 may be an internal storage unit of the control chip, such as a hard disk or a memory of the control chip. The memory 211 may also be an external storage device of the control chip, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, provided on the control chip. Further, the memory 211 may also include both an internal storage unit of the control chip and an external storage device. The memory 211 is used for storing the computer program and other programs and data required by the control chip. The memory 211 may also be used to temporarily store data that has been output or is to be output.
The invention also provides a storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the adjustment method as described above.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by functions and internal logic of the process, and should not limit the implementation process of the embodiments of the present invention in any way.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative methods and steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein.
Claims (10)
1. A method of audio signal conditioning, comprising the steps of:
acquiring a first signal-to-noise ratio, wherein the first signal-to-noise ratio is the signal-to-noise ratio of an audio signal in a first sound channel;
acquiring a second signal-to-noise ratio, wherein the second signal-to-noise ratio is the signal-to-noise ratio of the audio signal in the second channel;
and when the first signal-to-noise ratio is greater than the second signal-to-noise ratio and the difference value between the first signal-to-noise ratio and the second signal-to-noise ratio is greater than a preset value, copying the audio signal in the first sound channel into the second sound channel.
2. The adjustment method of claim 1, said obtaining a first signal-to-noise ratio, comprising the steps of:
and acquiring the signal-to-noise ratio corresponding to each frequency point of the audio signal of the first sound channel in preset time, and averaging the corresponding signal-to-noise ratios to obtain the signal-to-noise ratio of the audio signal of the first sound channel.
3. The adjusting method according to claim 1, when the first signal-to-noise ratio is greater than the second signal-to-noise ratio and a difference between the first signal-to-noise ratio and the second signal-to-noise ratio is greater than a preset value, before copying the audio signal in the first channel into the second channel, further comprising the steps of:
acquiring a signal-to-noise ratio corresponding to each frequency point of an audio signal of a first sound channel in preset time;
acquiring a signal-to-noise ratio corresponding to each frequency point of the audio signal of the second channel in preset time;
and calculating the difference value of the signal-to-noise ratio of the first sound channel and the second sound channel corresponding to each frequency point.
4. The adjusting method according to claim 3, copying the audio signal in the first channel into the second channel when the first signal-to-noise ratio is greater than the second signal-to-noise ratio and the difference between the first signal-to-noise ratio and the second signal-to-noise ratio is greater than a preset value, further comprising the steps of:
when the difference value of the signal-to-noise ratios of the audio signals of the first channel and the second channel corresponding to any frequency point is larger than the preset value, performing gain adjustment on the audio signal of the second channel at the corresponding frequency point;
if the difference value of the signal-to-noise ratios of the audio signals of the first sound channel and the second sound channel at the corresponding frequency point is smaller than or equal to the preset value after the gain adjustment, outputting the audio signals after the gain adjustment through the second sound channel;
if the difference value of the signal to noise ratios of the audio signals of the first channel and the second channel at the corresponding frequency points is still larger than the preset value and the difference value of the signal to noise ratios of the audio signals of the first channel and the second channel is also larger than the preset value after the gain adjustment, copying the audio signal of the first channel to the second channel for output;
and if the difference of the signal-to-noise ratios of the audio signals of the first sound channel and the second sound channel at the corresponding frequency points is still larger than the preset value after the gain adjustment, and the difference of the signal-to-noise ratios of the audio signals of the first sound channel and the second sound channel is smaller than or equal to the preset value, outputting the audio signals after the gain adjustment through the second sound channel.
5. A conditioning method according to claim 3, the conditioning method further comprising the steps of:
and when the difference value of the signal-to-noise ratios of the audio signals of the first sound channel and the second sound channel corresponding to any frequency point is larger than the preset value, reducing the output volume of the second sound channel.
6. An audio signal conditioning device, characterized in that the conditioning device comprises: the system comprises an acquisition module, a monitoring module and a copying module;
the acquisition module is used for acquiring a first signal-to-noise ratio of the audio signal in the first sound channel and acquiring a second signal-to-noise ratio of the audio signal in the second sound channel;
the monitoring module is used for calculating the difference value of the signal-to-noise ratios of the audio signals of the first sound channel and the second sound channel and monitoring the relation between the difference value of the signal-to-noise ratios and a preset value;
the copying module is used for copying the audio signal in the first sound channel into the second sound channel when the first signal-to-noise ratio is larger than the second signal-to-noise ratio and the difference value between the first signal-to-noise ratio and the second signal-to-noise ratio is larger than a preset value.
7. The adjustment device of claim 6, further comprising a gain adjustment module;
the gain adjusting module is used for adjusting the gain of the audio signal of the second channel at the corresponding frequency point when the difference value of the signal-to-noise ratio corresponding to any frequency point of the audio signal of the first channel and the audio signal of the second channel in the preset time is larger than the preset value.
8. The adjustment device of claim 6, further comprising a volume adjustment module;
the volume adjusting module is used for reducing the output volume of the second channel at the corresponding frequency point when the difference value of the signal-to-noise ratio corresponding to any frequency point of the audio signals of the first channel and the second channel in the preset time is larger than the preset value.
9. A control chip comprising a memory, a processor and a computer program stored in said memory and executable on said processor, characterized in that said processor implements the steps of the regulation method according to any one of claims 1 to 5 when executing said computer program.
10. A storage medium storing a computer program, wherein the computer program when executed by a processor implements the steps of the adjustment method according to any one of claims 1 to 5.
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