CN110888621A - Audio signal processing device, method and storage medium - Google Patents
Audio signal processing device, method and storage medium Download PDFInfo
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- CN110888621A CN110888621A CN201911217612.5A CN201911217612A CN110888621A CN 110888621 A CN110888621 A CN 110888621A CN 201911217612 A CN201911217612 A CN 201911217612A CN 110888621 A CN110888621 A CN 110888621A
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Abstract
The invention discloses an audio signal processing device, a method and a storage medium, wherein the device comprises an input/output circuit, a temperature sensor, a processor and a memory; the processor is used for acquiring a first audio signal from the input-output circuit, processing the first audio signal to acquire a second audio signal, transmitting the second audio signal to the input-output circuit, acquiring a calibration parameter corresponding to the temperature of the input-output circuit, and calibrating the first audio signal and/or the second audio signal according to the calibration parameter. The audio signal processing device has a simple circuit structure and low use and maintenance cost; the influence of hardware performance change caused by temperature change can be overcome, the audio signal processing effect is improved, and under the condition that the performance of the processor is strong enough, the processor carries out the calibration process of the first audio signal and the second audio signal in real time, so that the more accurate calibration effect can be provided. The invention is widely applied to the technical field of electronic circuits.
Description
Technical Field
The present invention relates to the field of electronic circuit technology, and in particular, to an audio signal processing apparatus, method, and storage medium.
Background
In the field of audio analysis and the like, an input/output circuit is generally used to receive an audio signal from an external device, the audio signal is subjected to preprocessing such as analog-to-digital conversion and filtering, and then is input into a processor, the processor performs processing such as amplitude measurement transformation, frequency transformation, synthesis, spectrum analysis and noise reduction on the audio signal, and the processor may also transmit the processed audio signal to the external device through the input/output circuit. The input/output circuit is used as a peripheral circuit of the processor, and due to the physical characteristics of the components, the input/output circuit is inevitably affected by the ambient temperature and the heat generated during the operation of the input/output circuit, so that the electrical performance of the input/output circuit is changed, and the audio signal received by the processor or the audio signal sent by the processor is deviated.
The prior art generally adds a negative feedback circuit or the like to an input/output circuit to correct temperature drift, but this increases the complexity of hardware and increases the use cost. In principle, the negative feedback circuit can only reduce the influence of temperature drift to a certain extent, but cannot offset the influence, so that the prior art has limited improvement effect on correcting the temperature drift and improving the accuracy of the audio signal processing result.
Disclosure of Invention
In view of at least one of the above-mentioned technical problems, it is an object of the present invention to provide an audio signal processing apparatus, method and storage medium.
In one aspect, an embodiment of the present invention includes an audio signal processing apparatus, including:
an input-output circuit for receiving a first audio signal and/or outputting a second audio signal;
a temperature sensor for detecting a temperature of the input-output circuit;
the processor is used for acquiring the first audio signal from the input-output circuit, processing the first audio signal to obtain a second audio signal, and transmitting the second audio signal to the input-output circuit; the audio signal calibration circuit is also used for acquiring a calibration parameter corresponding to the temperature of the input and output circuit and calibrating the first audio signal and/or the second audio signal according to the calibration parameter;
and the memory is used for storing the temperature of the input and output circuit, the calibration parameters and the corresponding relation between the input and output circuits.
Further, the audio signal processing apparatus further includes:
the first detection circuit is used for carrying out signal detection on the input end of the input-output circuit so as to obtain a first electrical parameter;
and the second detection circuit is used for detecting signals at the output end of the input-output circuit so as to obtain a second electrical parameter.
Further, the processor is further configured to obtain a plurality of the first electrical parameters and a plurality of the second electrical parameters, and fit each of the first electrical parameters and the second electrical parameters through a fitting algorithm, so as to obtain the calibration parameters.
Further, the fitting algorithm is a least squares method.
Further, the processor is further configured to obtain the temperature of the input/output circuit when obtaining the plurality of first electrical parameters and the plurality of second electrical parameters, and store the temperature of the input/output circuit, the calibration parameter, and the corresponding relationship therebetween in the memory.
Further, the processor is further configured to load a plurality of loads on the input/output circuit when the plurality of first electrical parameters and the plurality of second electrical parameters are acquired, so that the temperature of the input/output circuit reaches a plurality of target values, respectively, and store the measured temperature of the input/output circuit at each of the target values, the calibration parameters, and the corresponding relationship therebetween in the memory.
In another aspect, embodiments further include an audio signal processing method, in receiving a first audio signal and/or outputting a second audio signal using an input-output circuit, performing the steps of:
detecting the temperature of the input and output circuit;
acquiring a calibration parameter corresponding to the temperature of the input and output circuit;
calibrating the first audio signal and/or the second audio signal according to the calibration parameter.
Further, the audio signal processing method further includes the steps of:
detecting signals at the input end of the input-output circuit so as to obtain a plurality of first electrical parameters;
and detecting signals at the output end of the input-output circuit so as to obtain a plurality of second electrical parameters.
And fitting each first electrical parameter and each second electrical parameter through a fitting algorithm to obtain the calibration parameters.
Further, the audio signal processing method further includes the steps of:
when a plurality of first electrical parameters and a plurality of second electrical parameters are obtained, loading a plurality of loads on the input/output circuit, so that the temperature of the input/output circuit respectively reaches a plurality of target values;
and acquiring and storing the temperature of the input and output circuit, the calibration parameters and the corresponding relation between the temperature and the calibration parameters measured under the target values.
In another aspect, the present invention also includes a storage medium having stored therein processor-executable instructions, which when executed by a processor, are used to perform the audio signal processing method according to the embodiment.
The invention has the beneficial effects that: in the audio signal processing apparatus described in the embodiment, the processor monitors the temperature of the input/output circuit, and queries the corresponding calibration parameter according to the temperature to calibrate the first audio signal and the second audio signal; the calibration of the first audio signal offsets the deviation caused by the performance change caused by the temperature change of the input and output circuit, thereby improving the quality of the process that the audio signal processing device receives the first audio signal provided by the external equipment; the calibration of the second audio signal can be used to counter deviations caused by performance variations due to temperature variations of the input-output circuit, thereby improving the quality of the process of providing the second audio signal to the external device by the audio signal processing means. In conclusion, the audio signal processing device in the embodiment does not need to add an additional circuit module, so that the circuit structure is simple, and the use and maintenance cost is low; the influence of hardware performance change caused by temperature change generated by external temperature or work heating can be overcome, so that the audio signal processing effect is improved, under the condition that the performance of the processor is strong enough, the processor carries out the calibration process of the first audio signal and the second audio signal in real time, and more accurate calibration effect can be provided. Furthermore, the audio signal processing apparatus described in the embodiment further has a function of updating the calibration parameter through the processor, so that the calibration process implemented based on the calibration parameter can adapt to performance changes caused by aging of hardware of the apparatus, thereby facilitating future maintenance and prolonging the service life of the audio signal processing apparatus.
Drawings
FIG. 1 is a schematic structural diagram of an audio signal processing apparatus according to an embodiment;
FIG. 2 is a circuit diagram of the first buffer and the first low-pass filter according to the embodiment;
FIG. 3 is a circuit diagram of the single-ended-to-differential converter in an embodiment;
FIG. 4 is a circuit diagram of the analog-to-digital converter in an embodiment;
FIG. 5 is a circuit diagram of the first, second, and third buffers in the embodiment;
FIG. 6 is a circuit diagram of the digital-to-analog converter in the embodiment;
FIG. 7 is a circuit diagram of the second low-pass filter in the embodiment;
fig. 8 is a schematic structural diagram of an audio signal processing apparatus provided with a first detection circuit and a second detection circuit in an embodiment.
Detailed Description
Example 1
In this embodiment, the audio signal processing apparatus is configured as shown in fig. 1, and includes an input/output circuit, a temperature sensor, a processor, and a memory.
The working principle of the audio signal processing device is as follows: the input and output circuit is a peripheral circuit of the processor, the input and output circuit receives a first audio signal input from the outside through a first interface, the first audio signal is sent to the processor through a second interface, the processor carries out processing such as filtering, synthesis and conversion to obtain a second audio signal, then the processor sends the second audio signal to the input and output circuit through the second interface, and the input and output circuit returns the second audio signal to the external equipment through the first interface.
In the working process of the audio signal processing device, when a first audio signal is received, the input/output circuit receives the first audio signal through one end of a first interface and sends the first audio signal to a processor through one end of a second interface, wherein one end of the first interface is an input end of the input/output circuit, and one end of the second interface is an output end of the input/output circuit; when the second audio signal is output, the input/output circuit receives the second audio signal sent by the processor through one end of the second interface, and sends the audio signal through one end of the first interface, at this time, one end of the second interface is the input end of the input/output circuit, and one end of the first interface is the output end of the input/output circuit.
Referring to fig. 1, in this embodiment, the audio signal input/output circuit includes a first interface, a first buffer, a first low-pass filter, a single-ended differential converter, an analog-to-digital converter, a second buffer, a second interface, a third buffer, a digital-to-analog converter, and a second low-pass filter.
The input end of the first buffer is connected with one end of the first interface, and the output end of the first buffer is connected with one end of the second interface sequentially through the first low-pass filter, the single-ended differential converter, the analog-to-digital converter and the second buffer;
the input end of the third buffer is connected with the other end of the second interface, and the output end of the third buffer is connected with the other end of the first interface through the digital-to-analog converter and the second low-pass filter in sequence.
The first interface and the second interface are provided in the form of I2S.
The circuit diagram of the first buffer used in this embodiment is shown in the left half of fig. 2, and includes a first operational amplifier U1, a twelfth resistor R12, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, and a transient suppression transistor TVS;
the non-inverting input end of the first operational amplifier U1 is grounded through a twelfth resistor R12 and a transient suppression tube TVS in sequence; one end of the twelfth resistor R12 is used as an input end of the first buffer;
the output end of the first operational amplifier U1 is grounded through a fifteenth resistor R15 and a seventeenth resistor R17 in sequence; one end of the seventeenth resistor R17 is used as an output end of the first buffer;
the output end and the inverting input end of the first operational amplifier U1 are connected through a sixteenth resistor R16.
The first buffer has high input impedance and low output impedance, and plays a role of impedance matching. The audio signal output by the first buffer enters a first low pass filter.
The circuit diagram of the first low-pass filter used in this embodiment is shown in the right half of fig. 2, and includes a second operational amplifier U2, an eleventh resistor R11, a thirteenth resistor R13, a fourteenth resistor R14, a thirty-first capacitor C31, and a thirty-second capacitor C32;
the non-inverting input end of the second operational amplifier U2 is grounded;
the thirty-first capacitor C31, the eleventh resistor R11 and the fourteenth resistor R14 form a feedback circuit, and the output end and the inverting input end of the second operational amplifier U2 are connected through the feedback circuit;
one end of the feedback circuit is grounded and is led out through a thirteenth resistor R13 to serve as the input end of the first low-pass filter;
the output of the second op-amp U2 serves as the output of the first low pass filter.
The first low-pass filter can filter out low-frequency noise in the audio signal, so that the audio signal is purer.
The circuit diagram of the single-ended-to-differential converter used in this embodiment is shown in fig. 3, and its core component is a conversion chip of model AP8138, and its input terminal is connected to the output terminal of the first low-pass filter. The audio signal output by the first low-pass filter is a single-ended signal, and the single-ended signal is converted into a differential signal by the single-ended differential converter, so that a common-mode signal is suppressed, and the quality of the audio signal is improved.
The differential signal output by the single-ended-to-differential converter is received by the analog-to-digital converter shown in fig. 4. The core of the analog-to-digital converter is a chip of model CS5361, which can convert the audio signal in analog form into an audio signal in digital form and output it to the second buffer. The second buffer may function as an impedance matching so that when the second interface of the I2S standard is connected to the audio processor, the audio signal in digital form may be transmitted to the audio processor with low loss for processing and analysis by the audio processor.
The audio processor returns the converted audio signal or the data obtained by processing the audio signal to the second interface and receives the converted audio signal or the data by the third buffer. The third buffer also functions as impedance matching. Preferably, in this embodiment, the first buffer, the second buffer and the third buffer all have the same structure, that is, their circuit diagrams are all as shown in fig. 5, so that the complexity of circuit design can be reduced, and the stability of circuit operation can be improved.
The digital signal output from the third buffer enters the digital-to-analog converter shown in fig. 6 for digital-to-analog conversion. The core of the digital-to-analog converter is a chip of model CS4344, which can convert the digital signal into an analog signal and output it to the second low-pass filter.
Referring to fig. 7, the second low pass filter includes a third op-amp U3, a forty-seventh resistor R47, a forty-eighth resistor R48, a forty-ninth resistor R49, a fifty-fifth resistor R50, a fifty-first resistor R51, a fifty-second resistor R52, a sixty-ninth capacitor C69, a seventy-fourth capacitor C70, a seventy-fourth capacitor C71, and a seventy-second capacitor C72;
the sixty-ninth capacitor C69, the forty-seventh resistor R47 and the forty-ninth resistor R49 form a feedback circuit, and the output end and the inverting input end of the third operational amplifier U3 are connected through the feedback circuit;
one end of the feedback circuit is grounded through a seventh eleventh capacitor C71 and is led out through a forty-eight resistor R48 to serve as the input end of the second low-pass filter;
the non-inverting input end of the third operational amplifier U3 is led out through a fifth-eleventh resistor R51 and grounded through a parallel circuit formed by a fifth-twelfth resistor R52 and a seventy-second capacitor C72;
the output end of the third operational amplifier U3 is led out through a seventy capacitor C70 to be used as the output end of the second low-pass filter.
The second low-pass filter shown in fig. 7 may receive the differential signal output by the digital-to-analog differentiator, filter low-frequency noise, and output a single-ended signal to the first interface for an audio signal source or other devices to obtain.
The temperature sensor may be mounted on any one of the components of the input-output circuit, such as the first buffer and the first low-pass filter, so as to measure the operating temperature of the component; the temperature sensor may be composed of a plurality of sections, each of which is mounted on a component of the input/output circuit, and each of which measures an operating temperature of the corresponding component and averages the measured values to output.
The processor, in addition to processing the first audio signal, also reads its measured temperature from the temperature sensor, then queries the memory for a calibration parameter corresponding to the temperature, and then calibrates the first audio signal and/or the second audio signal using the queried calibration parameter.
The calibration is a linear calibration, and the calibration parameters specifically consist of a calibration factor k and an offset B. In this embodiment, the calibration factor and the offset used in the process of receiving the first audio signal are respectively denoted as k1And B1Let k denote the calibration factor and the offset used in the process of outputting the second audio signal respectively2And B2。
Each pair (k, B) corresponds to a temperature measured by a temperature sensor, and the mapping between them is stored in the memory.
The calibration process specifically comprises:
(A1) for the process of receiving a first audio signal: the processor obtains a first audio signal Y sent by the input and output circuit1(ii) a Due to the first audio signal Y at the second interface1Is passed through an input-output circuitThe first buffer, the first low-pass filter, the single-ended differential converter, the analog-to-digital converter and the second buffer transmit electric parameters such as voltage and current, and the like, which are deviated relative to a signal received at one end of the first interface, and the deviation is related to the working temperature or the ambient temperature of input and output circuit components such as the first buffer, the first low-pass filter and the like. By the formula
For the first audio signal Y at the second interface1The correction is carried out, so that the temperature compensation effect can be achieved, and the temperature drift influence generated by input and output circuit components such as a first buffer, a first low-pass filter and the like is overcome, so that the processor can obtain a more accurate first audio signal value, and the audio signal processing precision is improved;
(A2) for the process of outputting the second audio signal: the processor is used for correcting the first audio signal after being corrected
After processing, calculating to obtain a second audio signal Y which should be output2. But due to the second audio signal Y output by the processor2After passing through the third buffer, the digital-to-analog converter and the second low-pass filter in the input-output circuit, the offset occurs due to the temperature drift of these components, so the processor uses the formula
For the second audio signal Y2The modification is made that the value of the second audio signal actually output by the processor is
After reaching the first interface via the input-output circuit, a second audio signal Y is then available2Or a value close thereto, thereby overcoming the influence of temperature drift and improving the accuracy of audio signal processing.
In case the performance of the processor is sufficiently powerful, the processor is paired with the first audioThe processing of the signal and the obtaining of the second audio signal is performed in a short time during which the temperature of the input-output circuit or the components thereof is regarded as constant, so that for a set of first audio signals and the second audio signals resulting from the processing thereof the processor corrects the first audio signals with respect to the calibration parameters (k) used for the modification of the first audio signals1,B1) Calibration parameters (k) for use in connection with modifying a second audio signal2,B2) All corresponding to the same temperature.
Referring to fig. 8, in this embodiment, the audio signal processing apparatus is further provided with a first detection circuit and a second detection circuit. The first detection circuit is connected to the first interface in fig. 1, and is configured to detect parameters, such as voltage or current, of an audio signal received or output by the input/output circuit at the end, which is referred to as a first electrical parameter in this embodiment; the second detection circuit is connected to the second interface in fig. 1, and is configured to detect parameters, such as voltage or current, of the audio signal received or output by the input/output circuit at the end, which is referred to as a second electrical parameter in this embodiment.
The processor is further configured to obtain a plurality of the first electrical parameters and a plurality of the second electrical parameters, and fit each of the first electrical parameters and the second electrical parameters by using a fitting algorithm such as a least square method, so as to obtain the calibration parameters.
The fitting process specifically comprises the following steps:
(B1) obtaining a calibration parameter (k)1,B1) The process of (2): calibration parameter (k)1,B1) The method is used for correcting a first audio signal acquired by a processor, the processor reads a first electrical parameter from a first interface through a first detection circuit, reads a second electrical parameter from a second interface through a second detection circuit, and under the condition of acquiring a plurality of groups of first electrical parameters and corresponding second electrical parameters, the first electrical parameters are taken as a transverse axis, the second electrical parameters are taken as a longitudinal axis, and the processing is carried out by using a least square method, so that a calibration parameter (k) can be acquired (k1,B1)；
(B2) Obtaining a calibration parameter (k)2,B2) Process for producing: calibration parameter (k)2,B2) The processor reads first electrical parameters from the first interface through the first detection circuit, reads second electrical parameters from the second interface through the second detection circuit, and obtains calibration parameters (k) by processing with the least square method and with the second electrical parameters as the horizontal axis and the first electrical parameters as the vertical axis under the condition of obtaining a plurality of groups of first electrical parameters and corresponding second electrical parameters, wherein the calibration parameters (k) can be obtained2,B2)。
The processor may also monitor the temperature of the input-output circuit via a temperature sensor. The above fitting processes (B1) and (B2) are performed separately with the input-output circuits at different temperatures, resulting in sets of calibration parameters (k) as shown in table 11,B1) And (k)2,B2) And stores it in memory.
TABLE 1
By providing the first detection circuit and the second detection circuit, the audio signal processing apparatus in this embodiment can measure calibration parameters at various temperatures by itself, and store the correspondence between the temperatures and the calibration parameters in the memory. When the audio signal processing device is actually used, the corresponding calibration parameter (k) can be inquired and obtained as long as the temperature T of the input-output circuit or the component parts thereof is measured1,B1) And (k)2,B2) And thus for modification of the first audio signal and the second audio signal.
In the calculation of the calibration parameters (k)1,B1) And (k)2,B2) The temperature T of the input-output circuit varies with its workload and the ambient temperature at which it is located. The processor can be at different times during the change of the temperature T of the input-output circuitThe temperature T of the input and output circuit is measured by a plurality of groups of first electrical parameters and second electrical parameters respectively.
The processor may also intervene in the process of changing the temperature T of the input/output circuit, and the specific principle is to send a large amount of data to the input/output circuit, so as to increase the load of the input/output circuit and to promote the temperature of the input/output circuit to reach the target value more quickly. The input and output circuit is in different loads, and under the combined action of the self heat generation of the input and output circuit and the ambient temperature, the temperature of the input and output circuit finally reaches different target values. After the target value is reached, the processor performs the fitting processes (B1) and (B2) described above, thereby measuring the calibration parameter at the target value. By loading the processor on the input/output circuit, the calibration parameter (k) at different temperatures can be obtained more efficiently1,B1) And (k)2,B2)。
In this embodiment, the memory may also be used to store the number of the audio signal storage means, and each set of calibration parameters (k)1,B1) And (k)2,B2) The date of measurement of. Checking each set of calibration parameters (k) by a processor1,B1) And (k)2,B2) Each time after a certain time limit has elapsed, the above fitting processes (B1) and (B2) are re-executed, thereby calibrating the parameters (k) for each set1,B1) And (k)2,B2) And (6) updating. For each set of calibration parameters (k)1,B1) And (k)2,B2) The periodic update of the audio signal storage device can adapt to the temperature drift characteristic change caused by the hardware characteristic change of the input-output circuit after the audio signal storage device is used for a period of time.
Example 2
The audio signal processing method in this embodiment can be regarded as a use method or a control method of the audio signal processing apparatus described in embodiment 1. In the process of receiving a first audio signal and/or outputting a second audio signal using the audio signal processing apparatus described in embodiment 1, the audio signal processing method in the present embodiment is performed, that is, the following steps are performed by a processor:
s1, detecting the temperature of the input and output circuit;
s2, acquiring calibration parameters corresponding to the temperature of the input and output circuit;
and S3, calibrating the first audio signal and/or the second audio signal according to the calibration parameters.
Further, before or after performing the steps S1-S3, the processor further performs the steps of:
p1, performing signal detection on the input end of the input-output circuit, thereby obtaining a plurality of first electrical parameters;
and P2, detecting signals at the output end of the input-output circuit so as to obtain a plurality of second electrical parameters.
And P3, fitting each first electrical parameter and each second electrical parameter through a fitting algorithm to obtain the calibration parameters.
Executing steps P1-P3 before executing steps S1-S3, the latest calibration parameters may be provided for executing steps S1-S3; steps P1-P3 are performed after steps S1-S3 are performed, and the latest calibration parameters may be provided for the later re-execution of steps S1-S3.
Further, when executing the P1 and P2, the processor further performs the steps of:
p4, loading a plurality of loads to the input-output circuit so that the temperatures of the input-output circuit reach a plurality of target values respectively;
p5., the measured temperature of the input/output circuit, the calibration parameter and the corresponding relation between them at each target value are acquired and stored.
By performing the above steps S1-S3, P1-P5, the advantageous effects as described in embodiment 1 can be achieved.
A computer program for executing the steps of the audio signal processing method may be written and stored in a storage medium. The audio signal processing method may be performed when a computer program in a storage medium is read out and executed.
It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Furthermore, the descriptions of upper, lower, left, right, etc. used in the present disclosure are only relative to the mutual positional relationship of the constituent parts of the present disclosure in the drawings. As used in this disclosure, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. In addition, unless defined otherwise, all technical and scientific terms used in this example have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the description of the embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this embodiment, the term "and/or" includes any combination of one or more of the associated listed items.
It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element of the same type from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present disclosure. The use of any and all examples, or exemplary language ("e.g.," such as "or the like") provided with this embodiment is intended merely to better illuminate embodiments of the invention and does not pose a limitation on the scope of the invention unless otherwise claimed.
It should be recognized that embodiments of the present invention can be realized and implemented by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer readable memory. The methods may be implemented in a computer program using standard programming techniques, including a non-transitory computer-readable storage medium configured with the computer program, where the storage medium so configured causes a computer to operate in a specific and predefined manner, according to the methods and figures described in the detailed description. Each program may be implemented in a high level procedural or object oriented programming language to communicate with a computer system. However, the program(s) can be implemented in assembly or machine language, if desired. In any case, the language may be a compiled or interpreted language. Furthermore, the program can be run on a programmed application specific integrated circuit for this purpose.
Further, operations of processes described in this embodiment can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The processes described in this embodiment (or variations and/or combinations thereof) may be performed under the control of one or more computer systems configured with executable instructions, and may be implemented as code (e.g., executable instructions, one or more computer programs, or one or more applications) collectively executed on one or more processors, by hardware, or combinations thereof. The computer program includes a plurality of instructions executable by one or more processors.
Further, the method may be implemented in any type of computing platform operatively connected to a suitable interface, including but not limited to a personal computer, mini computer, mainframe, workstation, networked or distributed computing environment, separate or integrated computer platform, or in communication with a charged particle tool or other imaging device, and the like. Aspects of the invention may be embodied in machine-readable code stored on a non-transitory storage medium or device, whether removable or integrated into a computing platform, such as a hard disk, optically read and/or write storage medium, RAM, ROM, or the like, such that it may be read by a programmable computer, which when read by the storage medium or device, is operative to configure and operate the computer to perform the procedures described herein. Further, the machine-readable code, or portions thereof, may be transmitted over a wired or wireless network. The invention described in this embodiment includes these and other different types of non-transitory computer-readable storage media when such media include instructions or programs that implement the steps described above in conjunction with a microprocessor or other data processor. The invention also includes the computer itself when programmed according to the methods and techniques described herein.
A computer program can be applied to input data to perform the functions described in the present embodiment to convert the input data to generate output data that is stored to a non-volatile memory. The output information may also be applied to one or more output devices, such as a display. In a preferred embodiment of the invention, the transformed data represents physical and tangible objects, including particular visual depictions of physical and tangible objects produced on a display.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention as long as the technical effects of the present invention are achieved by the same means. The invention is capable of other modifications and variations in its technical solution and/or its implementation, within the scope of protection of the invention.
Claims (10)
1. An audio signal processing apparatus, comprising:
an input-output circuit for receiving a first audio signal and/or outputting a second audio signal;
a temperature sensor for detecting a temperature of the input-output circuit;
the processor is used for acquiring the first audio signal from the input-output circuit, processing the first audio signal to obtain a second audio signal, and transmitting the second audio signal to the input-output circuit; the audio signal calibration circuit is also used for acquiring a calibration parameter corresponding to the temperature of the input and output circuit and calibrating the first audio signal and/or the second audio signal according to the calibration parameter;
and the memory is used for storing the temperature of the input and output circuit, the calibration parameters and the corresponding relation between the input and output circuits.
2. The audio signal processing apparatus according to claim 1, further comprising:
the first detection circuit is used for carrying out signal detection on the input end of the input-output circuit so as to obtain a first electrical parameter;
and the second detection circuit is used for detecting signals at the output end of the input-output circuit so as to obtain a second electrical parameter.
3. The audio signal processing apparatus according to claim 2, characterized in that:
the processor is further configured to obtain a plurality of the first electrical parameters and a plurality of the second electrical parameters, and fit each of the first electrical parameters and the second electrical parameters through a fitting algorithm, so as to obtain the calibration parameters.
4. The audio signal processing apparatus of claim 3, wherein the fitting algorithm is a least squares method.
5. The audio signal processing apparatus of claim 3 or 4, wherein the processor is further configured to obtain the temperature of the input-output circuit when obtaining the plurality of first electrical parameters and the plurality of second electrical parameters, and store the temperature of the input-output circuit, the calibration parameters, and the corresponding relationship therebetween in the memory.
6. The audio signal processing apparatus according to claim 3 or 4, wherein the processor is further configured to load a plurality of loads on the input/output circuit when the plurality of first electrical parameters and the plurality of second electrical parameters are acquired, so that the temperatures of the input/output circuit respectively reach a plurality of target values, and store the measured temperatures of the input/output circuit, the calibration parameters, and the corresponding relationships therebetween at the respective target values in the memory.
7. An audio signal processing method, characterized in that in receiving a first audio signal and/or outputting a second audio signal using an input-output circuit, the following steps are performed:
detecting the temperature of the input and output circuit;
acquiring a calibration parameter corresponding to the temperature of the input and output circuit;
calibrating the first audio signal and/or the second audio signal according to the calibration parameter.
8. The audio signal processing method of claim 7, further comprising the steps of:
detecting signals at the input end of the input-output circuit so as to obtain a plurality of first electrical parameters;
and detecting signals at the output end of the input-output circuit so as to obtain a plurality of second electrical parameters.
And fitting each first electrical parameter and each second electrical parameter through a fitting algorithm to obtain the calibration parameters.
9. The audio signal processing method of claim 8, further comprising the steps of:
when a plurality of first electrical parameters and a plurality of second electrical parameters are obtained, loading a plurality of loads on the input/output circuit, so that the temperature of the input/output circuit respectively reaches a plurality of target values;
and acquiring and storing the temperature of the input and output circuit, the calibration parameters and the corresponding relation between the temperature and the calibration parameters measured under the target values.
10. A storage medium having stored therein processor-executable instructions, which when executed by a processor, are for performing the method of any one of claims 7-9.
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