CN111786673A - Method and apparatus for analog to digital converter testing - Google Patents
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Abstract
The invention discloses a method and a device for testing an analog-digital converter, and relates to the technical field of computers. One embodiment of the method comprises: receiving audio data input to an analog-to-digital converter through an electrical signal; recording the audio data to obtain recorded data; and determining the test result of the analog-digital converter according to the audio data and the recording data. The embodiment can greatly improve the accuracy and stability of the test of the analog-digital converter, thereby more accurately determining the performance of the analog-digital converter.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a method and a device for testing an analog-digital converter.
Background
In the prior art, when an Analog to Digital Converter (ADC) test is performed, recording data is generally acquired by a microphone and then analyzed. Due to the influence of the test environment and the difference between the single microphones, the test method has low test accuracy and cannot accurately determine the performance of the ADC.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method and an apparatus for testing an adc, which can greatly improve the accuracy and stability of the adc test, so as to determine the performance of the adc more accurately.
According to an aspect of an embodiment of the present invention, there is provided a method for testing an analog-to-digital converter, including:
receiving audio data input to an analog-to-digital converter through an electrical signal;
recording the audio data to obtain recorded data;
and determining the test result of the analog-digital converter according to the audio data and the recording data.
Optionally, receiving audio data input to the analog-to-digital converter by an electrical signal includes: receiving a test instruction sent by sound source equipment, initializing the analog-digital converter, then starting a recording state and receiving audio data input to the analog-digital converter by the sound source equipment through an electric signal.
Optionally, the audio source device outputs the audio data through LINEOUT.
Optionally, determining a test result of the adc according to the audio data and the recording data includes: and converting the time domain signal of the recording data into a frequency domain signal by adopting inverse Fourier transform, comparing the frequency domain signal of the recording data with the frequency domain signal of the audio data based on a preset test index, and determining the test result of the analog-digital converter.
According to a second aspect of the embodiments of the present invention, there is provided an apparatus for testing an analog-to-digital converter, including:
a receiving module receiving audio data input to the analog-to-digital converter through an electrical signal;
the recording module is used for recording the audio data to obtain recording data;
and the analysis module is used for determining the test result of the analog-digital converter according to the audio data and the recording data.
Optionally, the receiving module receives audio data input to the analog-to-digital converter through an electrical signal, and includes: receiving a test instruction sent by sound source equipment, initializing the analog-digital converter, then starting a recording state and receiving audio data input to the analog-digital converter by the sound source equipment through an electric signal.
Optionally, the audio source device outputs the audio data through LINEOUT.
Optionally, the determining, by the analysis module, a test result of the adc according to the audio data and the recording data includes: and converting the time domain signal of the recording data into a frequency domain signal by adopting inverse Fourier transform, comparing the frequency domain signal of the recording data with the frequency domain signal of the audio data based on a preset test index, and determining the test result of the analog-digital converter.
According to a third aspect of embodiments of the present invention, there is provided an electronic device for analog-to-digital converter testing, comprising:
one or more processors;
a storage device for storing one or more programs,
when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the method provided by the first aspect of the embodiments of the present invention.
According to a fourth aspect of embodiments of the present invention, there is provided a computer readable medium, on which a computer program is stored, which when executed by a processor, implements the method provided by the first aspect of embodiments of the present invention.
One embodiment of the above invention has the following advantages or benefits: the audio data is received through the electric signal, so that on one hand, the front-end input consistency of all the analog-digital converters can be ensured, on the other hand, the environmental interference can be avoided, the test accuracy and stability of the analog-digital converters are greatly improved, and the performance of the analog-digital converters is more accurately determined.
Further effects of the above-mentioned non-conventional alternatives will be described below in connection with the embodiments.
Drawings
The drawings are included to provide a better understanding of the invention and are not to be construed as unduly limiting the invention. Wherein:
FIG. 1 is a schematic diagram of a main flow of a method of analog-to-digital converter testing according to an embodiment of the invention;
FIG. 2 is a schematic diagram of the main blocks of an apparatus for analog to digital converter testing in accordance with an embodiment of the present invention;
FIG. 3 is an exemplary system architecture diagram in which embodiments of the present invention may be employed;
fig. 4 is a schematic block diagram of a computer system suitable for use in implementing a terminal device or server of an embodiment of the invention.
Detailed Description
Exemplary embodiments of the present invention are described below with reference to the accompanying drawings, in which various details of embodiments of the invention are included to assist understanding, and which are to be considered as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
According to an aspect of an embodiment of the present invention, there is provided a method of analog-to-digital converter testing.
Fig. 1 is a schematic diagram of a main flow of a method for testing an analog-to-digital converter according to an embodiment of the present invention, and as shown in fig. 1, the method for testing an analog-to-digital converter includes: step S101, step S102, and step S103.
In step S101, audio data input to an analog-to-digital converter by an electric signal is received.
In the embodiment of the invention, the input end of the analog-digital converter is directly connected with the sound source equipment (namely the equipment for providing audio data) through a wire. The sound source equipment can be a computer, a mobile phone and the like. Compared with the mode of adopting analog signals, the mode of adopting the electric signals to receive the audio data can ensure that the front-end input of all the analog-digital converters is consistent on one hand, and can avoid environmental interference on the other hand, thereby greatly improving the accuracy and the stability of the test of the analog-digital converters and more accurately determining the performance of the analog-digital converters.
Optionally, receiving audio data input to the analog-to-digital converter by an electrical signal includes: receiving a test instruction sent by sound source equipment, initializing the analog-digital converter, then starting a recording state and receiving audio data input to the analog-digital converter by the sound source equipment through an electric signal. In the embodiment, the master-slave relation is adopted, the sound source equipment sends the test command to the analog-digital converter through the serial port, and the analog-digital converter starts recording after receiving the test command, so that the test error or test failure caused by the non-readiness of the sound source equipment or the analog-digital converter can be avoided, and the test accuracy is improved.
Alternatively, the sound source device outputs audio data through LINEOUT (linear output). The electrical signal output by the LINEOUT is a signal which is not amplified by a power amplifier, is the most original signal source after the chip converts a digital signal into an analog signal, does not contain extra sound pollution, can avoid environmental interference, and further improves the test accuracy.
In step S102, the audio data is recorded to obtain recorded data. In step S103, a test result of the adc is determined according to the audio data and the recording data.
In practical application, the device containing the analog-digital converter to be tested can be fixed on a product clamp, so that the influence on the test result caused by the displacement of the device in the test process is avoided.
Optionally, determining a test result of the adc according to the audio data and the recording data includes: and converting the time domain signal of the recording data into a frequency domain signal by adopting inverse Fourier transform, comparing the frequency domain signal of the recording data with the frequency domain signal of the audio data based on a preset test index, and determining the test result of the analog-digital converter. And the data of each channel is analyzed by adopting an inverse Fourier transform method, a professional hardware detection circuit is not needed, and the requirement on testing hardware is reduced.
The method in the embodiment of the invention can be applied to equipment with an analog-digital converter, such as a sound box with a screen, a computer, a mobile phone and the like. The following takes a sound box with a screen as an example to exemplarily explain the method of the embodiment of the invention.
And a test point is reserved at the front end of the sound box with the screen, the test point is contacted with the corresponding PIN foot in a thimble mode, and the other end of each PIN foot is connected with a LINEOUT interface of a computer. The sound box with the screen enters the acquisition state by sending a test instruction to the sound box with the screen through the computer (the sound box with the screen finishes the initialization operation related to the ADC and starts the ADC to acquire the audio data, the computer plays a fixed frequency signal or a sweep frequency signal through an audio player, the sound box with the screen finishes the recording operation to obtain the recording data, the recorded data is analyzed by inverse fast fourier transforms (e.g., synchronization between different channels, sensitivity, distortion, etc.) for example, after the data acquisition is complete, converting the time domain signal into a frequency domain signal by an inverse Fourier transform algorithm, comparing the frequency domain signal with the frequency domain of the input signal, analyzing the frequency of the recorded data, calculating decibel value, checking whether the voltage is cut off or not and whether the noise output is overlarge or not, therefore, whether the corresponding ADC channel is shut down or not and whether the noise is overlarge or not are tested, and the difference among different channels is calculated through decibel values of different channels.
With the high-speed development of the intelligent sound box industry, people are more and more urgent to recognize high-precision semantics of sound boxes. High-precision semantic recognition relates to hardware design and a voice algorithm of a sound box. The degree of the voice algorithm can be largely determined by the design of hardware, so the quality of the hardware design basically determines the basic tone of the sound box. The final hardware production also depends on the test scheme of the factory test on the ADC. Therefore, the test of the ADC by a factory determines the quality of the user experience of the intelligent sound box. The existing scheme generally adopts a recording mode, acquires recording data through microphones, analyzes the recording data, is influenced by the test environment of a production line, and cannot accurately determine the ADC (analog to digital converter) performance of a product due to the difference between the single microphones, so that the exposed product is poor in voice awakening and voice recognition experience. The embodiment of the invention directly inputs the recording data signals through the electric signals, so that the front-end input of all ADCs can be ensured to be consistent, and the result of analyzing the obtained recording data is more accurate and stable. And the data of each channel is analyzed by adopting an inverse Fourier transform method, a professional hardware detection circuit is not needed, and the requirement on testing hardware is reduced.
It should be noted that the method of the embodiment of the present invention may be executed by a server, for example: the server controls the sound source equipment to send audio data to equipment with an analog-digital converter, such as a sound box with a screen, a computer, a mobile phone and the like, controls the equipment with the analog-digital converter, such as the sound box with the screen, the computer, the mobile phone and the like, to record the audio data, and analyzes and determines a test result according to the audio data and the recorded data.
The method of the embodiment of the invention can also be realized by devices with a screen, such as a sound box, a computer, a mobile phone and the like, which are provided with analog-digital converters, for example: the equipment with the analog-digital converter, such as the sound box with the screen, the computer, the mobile phone and the like, controls the sound source equipment to send audio data to the equipment with the analog-digital converter, such as the sound box with the screen, the computer, the mobile phone and the like, records the audio data, and analyzes and determines a test result according to the audio data and the recorded data.
The method of the embodiment of the invention can also be realized by equipment with an analog-digital converter such as a sound box with a screen, a computer, a mobile phone and the like and sound source equipment together, for example: the sound source equipment sends audio data to equipment with an analog-digital converter, such as a sound box with a screen, a computer, a mobile phone and the like, and the equipment with the analog-digital converter, such as the sound box with the screen, the computer, the mobile phone and the like, records the audio data and analyzes and determines a test result according to the audio data and the recorded data.
According to a second aspect of the embodiments of the present invention, there is provided an apparatus for implementing the above method.
Fig. 2 is a schematic diagram of main blocks of an apparatus for testing an analog-to-digital converter according to an embodiment of the present invention, and as shown in fig. 2, the apparatus 200 for testing an analog-to-digital converter includes:
a receiving module 201 receiving audio data input to the analog-to-digital converter through an electrical signal;
the recording module 202 records the audio data to obtain recorded data;
and the analysis module 203 determines a test result of the analog-digital converter according to the audio data and the recording data.
Optionally, the receiving module receives audio data input to the analog-to-digital converter through an electrical signal, and includes: receiving a test instruction sent by sound source equipment, initializing the analog-digital converter, then starting a recording state and receiving audio data input to the analog-digital converter by the sound source equipment through an electric signal.
Optionally, the audio source device outputs the audio data through LINEOUT.
Optionally, the determining, by the analysis module, a test result of the adc according to the audio data and the recording data includes: and converting the time domain signal of the recording data into a frequency domain signal by adopting inverse Fourier transform, comparing the frequency domain signal of the recording data with the frequency domain signal of the audio data based on a preset test index, and determining the test result of the analog-digital converter.
According to a third aspect of embodiments of the present invention, there is provided an electronic device for analog-to-digital converter testing, comprising:
one or more processors;
a storage device for storing one or more programs,
when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the method provided by the first aspect of the embodiments of the present invention.
According to a fourth aspect of embodiments of the present invention, there is provided a computer readable medium, on which a computer program is stored, which when executed by a processor, implements the method provided by the first aspect of embodiments of the present invention.
Fig. 3 shows an exemplary system architecture 300 to which the method of analog to digital converter testing or the apparatus of analog to digital converter testing of embodiments of the present invention may be applied.
As shown in fig. 3, the system architecture 300 may include terminal devices 301, 302, 303, a network 304, and a server 305. The network 304 serves as a medium for providing communication links between the terminal devices 301, 302, 303 and the server 305. Network 304 may include various connection types, such as wired, wireless communication links, or fiber optic cables, to name a few.
The user may use the terminal device 301, 302, 303 to interact with the server 305 via the network 304 to receive or send messages or the like. The terminal devices 301, 302, 303 may have installed thereon various communication client applications, such as shopping-like applications, web browser applications, search-like applications, instant messaging tools, mailbox clients, social platform software, etc. (by way of example only).
The terminal devices 301, 302, 303 may be various electronic devices having a display screen and supporting web browsing, including but not limited to smart phones, tablet computers, laptop portable computers, desktop computers, and the like.
The server 305 may be a server providing various services, such as a background management server (for example only) providing support for shopping-like websites browsed by users using the terminal devices 301, 302, 303. The backend management server may analyze and perform other processing on the received data such as the product test request, and feed back a processing result (for example, test result information — just an example) to the terminal device.
It should be noted that the method for testing the adc provided by the embodiment of the present invention may be executed by the server 305, and accordingly, the apparatus for testing the adc may be disposed in the server 305.
It should be understood that the number of terminal devices, networks, and servers in fig. 3 is merely illustrative. There may be any number of terminal devices, networks, and servers, as desired for implementation.
Referring now to FIG. 4, a block diagram of a computer system 400 suitable for use with a terminal device implementing an embodiment of the invention is shown. The terminal device shown in fig. 4 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present invention.
As shown in fig. 4, the computer system 400 includes a Central Processing Unit (CPU)401 that can perform various appropriate actions and processes in accordance with a program stored in a Read Only Memory (ROM)402 or a program loaded from a storage section 408 into a Random Access Memory (RAM) 403. In the RAM 403, various programs and data necessary for the operation of the system 400 are also stored. The CPU 401, ROM 402, and RAM 403 are connected to each other via a bus 404. An input/output (I/O) interface 405 is also connected to bus 404.
The following components are connected to the I/O interface 405: an input section 406 including a keyboard, a mouse, and the like; an output section 407 including a display device such as a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, and a speaker; a storage section 408 including a hard disk and the like; and a communication section 409 including a network interface card such as a LAN card, a modem, or the like. The communication section 409 performs communication processing via a network such as the internet. A driver 410 is also connected to the I/O interface 405 as needed. A removable medium 411 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 410 as necessary, so that a computer program read out therefrom is mounted into the storage section 408 as necessary.
In particular, according to the embodiments of the present disclosure, the processes described above with reference to the flowcharts may be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising program code for performing the method illustrated in the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network through the communication section 409, and/or installed from the removable medium 411. The computer program performs the above-described functions defined in the system of the present invention when executed by a Central Processing Unit (CPU) 401.
It should be noted that the computer readable medium shown in the present invention can be a computer readable signal medium or a computer readable storage medium or any combination of the two. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present invention, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In the present invention, however, a computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, RF, etc., or any suitable combination of the foregoing.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, 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 or flowchart illustration, and combinations of blocks in the block diagrams 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.
The modules described in the embodiments of the present invention may be implemented by software or hardware. The described modules may also be provided in a processor, which may be described as: a processor comprising: a receiving module receiving audio data input to the analog-to-digital converter through an electrical signal; the recording module is used for recording the audio data to obtain recording data; and the analysis module is used for determining the test result of the analog-digital converter according to the audio data and the recording data. The names of these modules do not in some cases constitute a limitation to the module itself, and for example, a recording module may also be described as a "module that determines a test result of the analog-digital converter from the audio data and the recording data".
As another aspect, the present invention also provides a computer-readable medium that may be contained in the apparatus described in the above embodiments; or may be separate and not incorporated into the device. The computer readable medium carries one or more programs which, when executed by a device, cause the device to comprise: receiving audio data input to an analog-to-digital converter through an electrical signal; recording the audio data to obtain recorded data; and determining the test result of the analog-digital converter according to the audio data and the recording data.
According to the technical scheme of the embodiment of the invention, the audio data is received through the electric signal, so that the front-end input of all the analog-digital converters can be ensured to be consistent, the environmental interference can be avoided, the test accuracy and stability of the analog-digital converters are greatly improved, and the performance of the analog-digital converters is more accurately determined.
The above-described embodiments should not be construed as limiting the scope of the invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions can occur, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method of analog to digital converter testing, comprising:
receiving audio data input to an analog-to-digital converter through an electrical signal;
recording the audio data to obtain recorded data;
and determining the test result of the analog-digital converter according to the audio data and the recording data.
2. The method of claim 1, wherein receiving audio data input to an analog-to-digital converter via an electrical signal comprises: receiving a test instruction sent by sound source equipment, initializing the analog-digital converter, then starting a recording state and receiving audio data input to the analog-digital converter by the sound source equipment through an electric signal.
3. The method of claim 2, wherein the audio source device outputs the audio data through LINEOUT.
4. The method of claim 1, wherein determining the test results for the analog-to-digital converter from the audio data and the recording data comprises: and converting the time domain signal of the recording data into a frequency domain signal by adopting inverse Fourier transform, comparing the frequency domain signal of the recording data with the frequency domain signal of the audio data based on a preset test index, and determining the test result of the analog-digital converter.
5. An apparatus for analog to digital converter testing, comprising:
a receiving module receiving audio data input to the analog-to-digital converter through an electrical signal;
the recording module is used for recording the audio data to obtain recording data;
and the analysis module is used for determining the test result of the analog-digital converter according to the audio data and the recording data.
6. The apparatus of claim 5, wherein the receiving module receives audio data input to an analog-to-digital converter via an electrical signal, comprising: receiving a test instruction sent by sound source equipment, initializing the analog-digital converter, then starting a recording state and receiving audio data input to the analog-digital converter by the sound source equipment through an electric signal.
7. The apparatus of claim 6, wherein the audio source device outputs the audio data through LINEOUT.
8. The apparatus of claim 5, wherein the analysis module determines a test result for the analog-to-digital converter based on the audio data and the recording data, comprising: and converting the time domain signal of the recording data into a frequency domain signal by adopting inverse Fourier transform, comparing the frequency domain signal of the recording data with the frequency domain signal of the audio data based on a preset test index, and determining the test result of the analog-digital converter.
9. An electronic device for analog-to-digital converter testing, comprising:
one or more processors;
a storage device for storing one or more programs,
when executed by the one or more processors, cause the one or more processors to implement the method of any one of claims 1-4.
10. A computer-readable medium, on which a computer program is stored, which, when being executed by a processor, carries out the method according to any one of claims 1-4.
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