CN211128028U - Audio coding and decoding chip test tool and audio coding and decoding chip test device - Google Patents
Audio coding and decoding chip test tool and audio coding and decoding chip test device Download PDFInfo
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Abstract
The utility model provides an audio encoding and decoding chip test fixture and audio encoding and decoding chip testing arrangement, this audio encoding and decoding chip test fixture includes: the test fixture is provided with an analog audio input interface, an analog audio output interface and a mounting position for mounting an audio coding and decoding chip to be tested, the analog audio input interface and the analog audio output interface are used for being electrically connected with an audio analyzer, the analog audio input interface is used for being electrically connected with the input end of an encoder of the audio coding and decoding chip, and the analog audio output interface is used for being electrically connected with the output end of a decoder of the audio coding and decoding chip; the sound card is provided with a first sound card interface electrically connected with the upper computer and a second sound card interface electrically connected with the output end of the encoder and the input end of the decoder. The utility model discloses an audio encoding and decoding chip test fixture can test each item parameter of encoder and each item parameter of decoder to the wholeness ability that the chip was surveyed is compiled and decoded in aassessment audio frequency.
Description
Technical Field
The utility model relates to an audio encoding and decoding chip test field, more specifically relates to an audio encoding and decoding chip test fixture and audio encoding and decoding chip testing arrangement.
Background
Artificial intelligence technology is gaining depth in various areas of society, and speech processing systems are an important component of artificial intelligence. The performance of the audio codec chip in the speech processing system directly affects the speech signal pick-up and speech signal playing quality of the whole speech processing system.
In the audio codec chip test scheme in the related art, on one hand, only offline audio acquisition data can be imported into equipment for playing, so that parameters of audio data cannot be dynamically adjusted in the test process, and the test efficiency is low; on the other hand, the audio encoding and decoding chip can only be screened to be qualified, and the performance parameters of the encoder and the decoder are difficult to determine, so that the test result cannot accurately guide the design or the type selection.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an overcome above-mentioned problem or solve the audio frequency coding and decoding chip test fixture and audio frequency coding and decoding chip testing arrangement of above-mentioned problem at least partially.
In a first aspect, an embodiment of the present invention provides an audio codec chip test tool, including: the method comprises the following steps: the test fixture is provided with an analog audio input interface, an analog audio output interface and a mounting position for mounting an audio coding and decoding chip to be tested, wherein the analog audio input interface and the analog audio output interface are used for being electrically connected with an audio analyzer, the analog audio input interface is used for being electrically connected with an input end of an encoder of the audio coding and decoding chip, and the analog audio output interface is used for being electrically connected with an output end of a decoder of the audio coding and decoding chip; the sound card is provided with a first sound card interface electrically connected with an upper computer and a second sound card interface electrically connected with the output end of the encoder and the input end of the decoder.
In some embodiments, the mounting position is provided with a first interface and a second interface, a first end of the first interface is used for being electrically connected with an output end of the encoder, a second end of the first interface is electrically connected with the second card interface, a first end of the second interface is used for being electrically connected with an input end of the decoder, and a second end of the second interface is electrically connected with the second card interface.
In some embodiments, the first sound card interface is a USB interface.
In some embodiments, the sound card is a USB AISO interface protocol sound card.
In some embodiments, the main control chip of the sound card includes an acquisition path module and a play path module, an input end of the acquisition path module is electrically connected to an output end of the encoder, and an output end of the play path module is electrically connected to an input end of the decoder.
In a second aspect, an embodiment of the present invention provides an audio codec chip testing apparatus, including: the audio coding and decoding chip testing tool set forth in any one of the above; the audio analyzer is electrically connected with the analog audio input interface and the analog audio output interface; and the upper computer is electrically connected with the audio analyzer and the first sound card interface.
In some embodiments, the audio analyzer comprises: the input end of the analyzer decoder is electrically connected with the upper computer, and the output end of the analyzer decoder is electrically connected with the analog audio input interface; the output end of the analyzer coder is electrically connected with the upper computer, and the input end of the analyzer coder is electrically connected with the analog audio output interface.
In some embodiments, the audio codec chip testing apparatus includes: a coding test cycle comprising the upper computer, the analyzer decoder, the analog audio input interface, and the sound card; and the decoding test cycle comprises the upper computer, the sound card, the analog audio output interface and the analyzer encoder.
In some embodiments, the main control chip of the sound card comprises an acquisition path module and a play path module; the encoding test cycle comprises an acquisition channel module electrically connected between the output end of the encoder and the upper computer, and the decoding test cycle comprises a play channel module electrically connected between the upper computer and the input end of the decoder.
In some embodiments, the upper computer comprises: the input end of the analyzer decoder and the output end of the analyzer encoder are electrically connected with the audio analysis module; and the first sound card interface is electrically connected with the audio analysis module through the sound card control module.
The utility model discloses audio encoding and decoding chip test fixture and audio encoding and decoding chip testing arrangement, can realize each item parameter test of encoder and each item parameter test of decoder to the wholeness ability that the evaluation audio encoding and decoding chip surveyed, and only need the single assembly in the testing process, through adjusting the signal of inputing simulation audio input interface or adjust the signal of inputing the sound card, can realize the parameter control in the testing process, can simplify the test flow, help providing abundant and complete test result.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an audio codec chip testing tool according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an audio codec chip testing apparatus according to an embodiment of the present invention (showing an audio codec chip);
fig. 3 is a schematic structural diagram of a sound card according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The following describes an audio codec chip testing apparatus 1000 according to an embodiment of the present invention with reference to fig. 1 to 3.
The audio codec chip 400 includes encoder 410 and decoder 420, the utility model discloses the audio codec chip testing arrangement 1000 of the embodiment is used for testing the performance parameters of encoder 410 and decoder 420 of audio codec chip 400, for example can test audio codec chip 400' S audio Dynamic Range (DR), distortion factor (THD), Frequency Response Curve (FRC), noise (N), sensitivity (S), SNR (SNR) isoparametric.
As shown in fig. 1, the utility model discloses audio encoding and decoding chip testing arrangement 1000 of embodiment includes: the device comprises an audio coding and decoding chip testing tool 100, an audio analyzer 200 and an upper computer 300. The audio codec chip test tool 100, the audio analyzer 200 and the upper computer 300 are sequentially connected end to end.
The following describes the audio codec chip testing tool 100 according to an embodiment of the present invention with reference to fig. 1 and fig. 2.
As shown in fig. 1 and 2, the audio codec chip test tool 100 includes: a test fixture 110 and a sound card 120.
As shown in fig. 2, the test fixture 110 has an analog audio input interface 111, an analog audio output interface 112, and a mounting location 113.
The mounting position 113 is used for mounting the audio codec chip 400 to be tested, the analog audio input interface 111 and the analog audio output interface 112 are used for being electrically connected with the audio analyzer 200, the analog audio input interface 111 is used for being electrically connected with an input end of an encoder 410 of the audio codec chip 400, and the analog audio output interface 112 is used for being electrically connected with an output end of a decoder 420 of the audio codec chip 400.
The analog audio input interface 111 is used for being electrically connected with an audio output interface of the audio analyzer 200, and the analog audio input interface 111 can transmit analog audio data output by the audio analyzer 200 in real time to the audio codec chip test tool 100 for testing audio input by the audio codec chip 400, and then transmits the audio data to the upper computer 300 through the sound card 120 for processing.
The analog audio output interface 112 is used to electrically connect with the audio input interface of the audio analyzer 200, and the analog audio output interface 112 can transmit the analog audio signal output by the decoder 420 of the audio codec chip 400 to the audio analyzer 200.
The sound card 120 has a first sound card interface (left interface of the sound card 120 in fig. 1 and 2) for electrically connecting with the upper computer 300 and a second sound card interface (right interface of the sound card 120 in fig. 1 and 2) for electrically connecting with an output terminal of the encoder 410 and an input terminal of the decoder 420.
In an actual testing process, the audio codec chip 400 is installed in the installation position 113 of the test fixture 110, the audio codec chip test fixture 100 can implement access and output of a digital audio signal through the first sound card interface of the sound card 120, the audio codec chip test fixture 100 can implement access of an analog audio signal through the analog audio input interface 111, and the audio codec chip test fixture 100 can implement output of an analog audio signal through the analog audio output interface 112.
Thus, the audio codec chip test tool 100 can test the sensitivity, the signal-to-noise ratio, the background noise, the dynamic range, the distortion degree, the frequency response curve and other performances of the encoder 410 and the decoder 420, can evaluate the overall performance of the audio codec chip 400 through the respective performances of the encoder 410 and the decoder 420, and can dynamically set the parameters in real time by combining the audio analyzer 200 and the upper computer 300.
According to the utility model discloses audio encoding and decoding chip test fixture 100 can realize encoder 410's each item parameter test and decoder 420's specific parameter test to aassessment audio encoding and decoding chip 400's wholeness ability, and only need the single assembly in the test process, through adjusting the signal of inputing simulation audio input interface 111 or adjusting the signal of inputing sound card 120, can realize the parameter control in the test process, can simplify the test flow, help providing more abundant and complete test result.
When the audio codec chip test tool 100 is installed in the audio codec chip test device 1000, the audio codec chip test tool 100, the audio analyzer 200, and the upper computer 300 are sequentially connected end to end. The audio analyzer 200 is electrically connected to the analog audio input interface 111 and the analog audio output interface 112, and the upper computer 300 is electrically connected to the audio analyzer 200 and the first sound card interface.
The audio codec chip test tool 100 is used for installing an audio codec chip 400 to be tested. The audio analyzer 200 is configured to generate an analog audio signal based on data output to the audio analyzer 200 by the upper computer 300 and provide the analog audio signal to the encoder 410 of the audio codec chip 400, and the audio analyzer 200 is further configured to collect the analog audio signal decoded by the decoder 420 and encode the analog audio signal into a digital signal to provide the digital signal to the upper computer 300. The sound card 120 is used for receiving the digital audio signal output by the encoder 410 and providing the digital audio signal to the upper computer 300, and the sound card 120 is also used for receiving the data output by the upper computer 300 and providing the data to the decoder 420.
When the performance of the encoder 410 is tested by the audio codec chip testing device 1000, the upper computer 300 sends initial data to the audio analyzer 200, the audio analyzer 200 generates an analog audio signal based on the signal and provides the analog audio signal to the encoder 410 of the audio codec chip 400, the encoder 410 transmits the encoded digital audio signal to the sound card 120 after encoding is completed, the encoded digital audio signal is packed and transmitted back to the upper computer 300 through the sound card 120, and the upper computer 300 analyzes the data of the encoder 410 to test various parameter performances of the encoder 410.
When the audio codec chip testing device 1000 is used for testing the performance of the decoder 420, the upper computer 300 sends initial data to the sound card 120, and transmits digital audio signals to the decoder 420 through the sound card 120, the decoder 420 transmits decoded analog audio signals to the audio analyzer 200 after decoding, the audio analyzer 200 collects the analog audio signals to generate digital audio signals and transmits the digital audio signals back to the upper computer 300, and the upper computer 300 analyzes the digital audio signals to test various parameter performances of the decoder 420.
In addition, due to the data transfer function of the upper computer 300, the audio codec chip testing apparatus 1000 can test the comprehensive performance of the audio codec chip 400.
When the audio codec chip testing device 1000 is used to test the comprehensive performance of the audio codec chip 400, the upper computer 300 sends initial data (digital audio signals) to the audio analyzer 200, the audio analyzer 200 generates analog audio signals based on the signals and provides the analog audio signals to the encoder 410 of the audio codec chip 400, the encoder 410 transmits the encoded digital audio signals to the sound card 120 after encoding is completed, and packs the digital audio signals back to the upper computer 300 through the sound card 120, the upper computer 300 analyzes the data to test various parameter performances of the encoder 410, the upper computer 300 can also transmit the data back to the sound card 120 and transmits the digital audio signals to the decoder 420 through the sound card 120, the decoder 420 transmits the decoded analog audio signals to the audio analyzer 200 after decoding is completed, the audio analyzer 200 collects the analog audio signals to generate digital audio signals and transmits the digital audio signals back to the upper computer 300, the upper computer 300 analyzes the digital audio signal to test the comprehensive parameter performance of the audio codec chip 400.
In the test process, the parameters can be dynamically adjusted and tested. When testing the encoder 410, parameters can be configured in real time, signal acquisition can be performed in real time, changed audio data can be fed back in time, and a user can conveniently and quickly position the required configuration. Similarly, when the decoder 420 is tested, the output audio data can be rapidly configured, the audio information with corresponding configuration is output, played and output through the decoder 420 to the audio analyzer 200 for collection, and then processed by the upper computer 300.
According to the utility model discloses audio encoding and decoding chip testing arrangement 1000, can realize encoder 410's each item parameter test, decoder 420's each item parameter test and audio encoding and decoding chip 400's comprehensive parameter test on line, and only need the single assembly in the testing process, through the parameter of adjusting host computer 300 or audio analyzer 200, can realize the parameter dynamic adjustment in the testing process, can simplify the test procedure, help providing abundant and complete test result.
In some embodiments, as shown in fig. 2, the mounting site 113 is provided with a first interface 114 and a second interface 115, a first end of the first interface 114 is electrically connected to an output terminal of the encoder 410, a second end of the first interface 114 is electrically connected to the second sound card interface, a first end of the second interface 115 is electrically connected to an input terminal of the decoder 420, and a second end of the second interface 115 is electrically connected to the second sound card interface.
In practical implementation, the second end of the first interface 114 and the second end of the second interface 115 can be electrically connected to the second sound card interface through a digital audio transmission bus, so that during the testing process, only the audio codec chip 400 to be tested needs to be mounted to the mounting position 113 of the test fixture 110, and if the type of the audio codec chip 400 to be tested is changed, other types of digital audio transmission buses can also be changed.
As shown in fig. 3, in some embodiments, the first sound card interface may be a USB interface, that is, the sound card 120 is a USB sound card 120, and the sound card 120 is of a type that is convenient for connecting with a conventional general-purpose upper computer 300 and packaging multiple channels of data to the upper computer 300 (such as a computer).
Further, the sound card 120 may be a USB AISO interface protocol sound card.
It should be noted that the USB AISO interface protocol sound card is a USB sound card with an audio input/output interface, and the USB iso interface protocol sound card can control parameters of audio data acquisition, such as a sampling rate, a channel number, a sampling bit number, a gain, and the like; collecting multi-channel data on an audio bus in real time, and uploading the collected multi-channel audio data; and outputting the audio data to an audio bus in real time to provide the audio data for the coding and decoding chip.
In this embodiment, by using the USB AISO interface protocol sound card, since the transmission delay time of the USB AISO interface protocol sound card is less than 10ms, the real-time performance of information acquisition during testing can be improved. The ASIO interface is an interface protocol for audio transmission, can simultaneously transmit 32-channel input and 32-channel output audio, and is suitable for simultaneously testing performance parameters of each channel of a multi-channel codec chip.
In addition, the USB ASIO interface is a universal interface, and can be conveniently and quickly tested and can transmit multi-channel audio data when being applied to the testing device or the testing tool.
Through adopting USB AISO interface protocol sound card, this audio frequency coding and decoding chip testing arrangement 1000 or test fixture can provide abundant digital audio transmission bus, like general standard I2S audio bus interface, the TDM audio bus interface of transferable multichannel, but remote transmission's SPDIF audio bus interface, PCM audio bus interface in addition simultaneously, DSP audio bus interface, a SPI audio bus interface for audio transmission, realize that USB ASIO interface protocol sound card 120 is connected with different coding and decoding chips, convenience of customers tests.
In actual implementation, the USB AISO interface protocol sound card may include XMOS, FPGA, MCU, and other chips to perform data acquisition and transmission on audio data.
As shown in fig. 3, taking the USB AISO interface protocol sound card as an XMOS sound card as an example for description, the XMOS sound card includes a USB audio interface module 121, an audio control module 122, and an audio transceiving module 123, the XMOS sound card further includes two interfaces (a first sound card interface and a second sound card interface), the first sound card interface is a USB interface, the first sound card interface is electrically connected to the upper computer 300, and the first sound card interface is electrically connected to the audio codec chip 400 to be tested.
The USB audio interface module 121 is a firmware module in the sound card 120, and the USB audio interface module 121 includes a USB ASIO protocol, and can package and send multiple paths of data to the upper computer 300, such as a computer.
The Audio Control module 122(Audio Control) is a Control part inside the sound card 120, and the Audio Control module 122 of the internal Control part is configured to analyze Audio characteristics transmitted by the USB to Control characteristics of an Audio sampling rate, an Audio sampling bit number, an Audio acquisition channel number, Audio volume of each channel, and the like of digital Audio acquisition and output, and Control the Audio transceiver module 123 to transmit Audio data according to an instruction of the upper computer 300.
The Audio transceiver module 123(Audio) is configured to pack and send out the digital Audio signals transmitted from the Audio codec chip 400; the Audio transceiver module 123(Audio) is further configured to parse the data transmitted by the upper computer 300 into digital Audio signals, and transmit the digital Audio signals to the Audio codec chip 400.
The main control chip of the sound card 120 may include an acquisition path module and a play path module.
The input end of the acquisition access module is electrically connected with the output end of the encoder 410, and the output end of the acquisition access module is electrically connected with the upper computer 300. The acquisition channel module is used for converting the digital audio signals encoded by the audio encoding and decoding chip 400 into USB data and transmitting the USB data to the upper computer 300. It should be noted that "acquiring" in the acquisition path module means that the module is used for acquiring the digital signal output by the encoder 410 of the audio codec chip 400.
The output end of the play path module is electrically connected to the input end of the decoder 420, and the input end of the play path module is electrically connected to the upper computer 300. The play access module is used for converting the USB data issued by the upper computer 300 into digital audio signals and transmitting the digital audio signals to the audio encoding and decoding chip 400. It should be noted that "playing" in the playing path module means that in the process of playing music, the upper computer 300 outputs a digital signal, and the digital signal is decoded into an analog signal by the decoder 420 of the audio codec chip 400 through the playing path module, and then drives the speaker to play, and certainly, in the embodiment of the present invention, the speaker is not connected behind the decoder 420.
The two channel modules can implement data transmission and data uploading of the sound card 120, so that the audio codec chip test tool 100 of the present application can simultaneously test the encoder 410 and the decoder 420 of the audio codec chip 400.
In some embodiments, as shown in fig. 1, the upper computer 300 includes: an audio analysis module 310 and a sound card control module 320.
The audio analysis module 310 can load a conventional audio analysis program, and the input end of the analyzer decoder 210 and the output end of the analyzer encoder 220 are electrically connected with the audio analysis module 310;
the first sound card interface is electrically connected to the audio analysis module 310 through a sound card control module 320, and the sound card control module 320 can be used as a driver of the sound card 120.
The audio analysis module 310 of the upper computer 300 may be installed with an audio analysis program, and the audio analysis module 310 may control the audio analyzer 200 and process input data. The audio analysis module 310 can process either offline data or online data.
The sound card control module 320 is loaded with a USB ASIO sound card 120 driver, the sound card 120 driver includes a sound card 120 control platform, and the sound card control module 320 can set and output the output audio parameters, thereby achieving the function of dynamically setting parameters.
In some embodiments, as shown in fig. 1, audio analyzer 200 comprises: an analyzer decoder 210 and an analyzer encoder 220.
The input end of the analyzer decoder 210 is electrically connected to the upper computer 300, the output end of the analyzer decoder 210 is electrically connected to the analog audio input interface 111, and the analyzer decoder 210 is a high-performance decoder whose decoding performance is much higher than that of the encoder 410 of the audio codec chip 400 to be tested.
The output end of the analyzer encoder 220 is electrically connected to the upper computer 300, the input end of the analyzer encoder 220 is electrically connected to the analog audio output interface 112, and the analyzer encoder 220 is a high-performance encoder, and the encoding performance of the high-performance encoder is far higher than that of the decoder 420 of the audio codec chip 400 to be tested.
By setting the audio analyzer 200 with the above structure, when testing the performance of the encoder 410 and the decoder 420 of the audio codec chip 400 to be tested, the transceiver signals of the upper computer 300 are both digital signals, and the signals input to the encoder 410 of the audio codec chip 400 to be tested are analog audio signals, and the signals input to the decoder 420 of the audio codec chip 400 to be tested are digital audio signals.
The audio analyzer 200 mainly works in cooperation with the audio analysis module 310, and the audio analyzer 200 may be configured to output corresponding analog audio through the audio analysis module 310, and may also collect and encode the audio output by the decoder 420, and output the audio to the audio analysis module 310 for processing. For example, the audio analyzer 200 may be an ap (audio precision) analyzer, and the model may be audioprecision.
By combining with a mature audio analyzer 200(AP audio analyzer 200), the performance test of the coding and decoding chip can more accurately and visually observe corresponding parameter images and more accurately judge the performance of the coding and decoding chip, so that a user can compare and select different audio coding and decoding chips 400 and select the audio coding and decoding chip 400 with better performance parameters.
In some embodiments, as shown in fig. 1, the audio codec chip testing apparatus 1000 includes: an encoding test loop 1001 and a decoding test loop 1002.
The bold arrow lines in fig. 1 represent the encoding test cycle 1001 and the bold arrow lines represent the decoding test cycle 1002.
The encoding test cycle 1001 includes the upper computer 300, the analyzer decoder 210, the analog audio input interface 111, and the sound card 120; the decode test cycle 1002 includes the upper computer 300, the sound card 120, the analog audio output interface 112, and the analyzer encoder 220.
After the audio codec chip 400 to be tested is loaded into the mounting location 113, the upper computer 300, the analyzer decoder 210, the analog audio input interface 111, the encoder 410, and the sound card 120 are sequentially connected end to form an encoding test cycle 1001, and the upper computer 300, the sound card 120, the decoder 420, the analog audio output interface 112, and the analyzer encoder 220 are sequentially connected end to form a decoding test cycle 1002.
In an embodiment where the main control chip of the sound card 120 includes an acquisition path module and a play path module, the encoding test cycle 1001 includes the acquisition path module electrically connected between the output end of the encoder 410 and the upper computer 300, and the decoding test cycle 1002 includes the play path module electrically connected between the upper computer 300 and the input end of the decoder 420.
After the audio codec chip 400 to be tested is loaded into the mounting location 113, the encoding test cycle 1001 is: the audio analysis module 310 of the upper computer 300, the analyzer decoder 210, the analog audio input interface 111, the encoder 410, the acquisition channel module of the sound card 120, the sound card control module 320 of the upper computer 300, and the audio analysis module 310 of the upper computer 300.
The encoder 410 of the audio codec chip 400 is tested: the audio analysis module 310 of the upper computer 300 controls the audio analyzer 200 to dynamically generate analog audio, and outputs the analog audio to the encoder 410 of the audio codec chip 400 through the analog audio input interface 111 for encoding. After the digital audio signal is encoded and output, the digital audio signal is collected and output to the sound card control module 320 of the upper computer 300 through the sound card 120 of the USB ASIO interface protocol. The data are packaged in the sound card control module 320 of the upper computer 300 and sent to the audio analysis module 310 of the upper computer 300 to analyze parameters such as audio Dynamic Range (DR), distortion (THD), Frequency Response Curve (FRC), bottom noise (N), sensitivity (S), signal-to-noise ratio (SNR) and the like in real time.
After the audio codec chip 400 to be tested is loaded into the mounting bit 113, the decoding test cycle 1002 is: the audio analysis module 310 of the upper computer 300, the sound card control module 320 of the upper computer 300, the playing channel module of the sound card 120, the decoder 420, the analog audio output interface 112, the analyzer encoder 220, and the audio analysis module 310 of the upper computer 300.
The decoder 420 of the audio codec chip 400 is tested: the audio analysis module 310 of the upper computer 300 generates digital audio to the sound card control module 320 of the upper computer 300, and then the sound card 120 using the USB ASIO interface protocol sends the received digital audio to the decoder 420 of the audio codec chip 400 for decoding, and decodes the digital audio into analog audio for output. The audio analyzer 200 receives the audio through the analog audio output interface 112, and then collects and encodes the audio into a digital audio signal to the audio analysis module 310 of the upper computer 300, and the audio analysis module 310 of the upper computer 300 analyzes parameters of the decoder 420, such as the frequency Dynamic Range (DR), the distortion factor (THD), the Frequency Response Curve (FRC), the noise floor (N), the sensitivity (S), and the signal-to-noise ratio (SNR).
Of course, since the encoding test loop 1001 and the decoding test loop 1002 are coupled at the upper computer 300, the upper computer 300 can be used as a coupling node of the encoding test loop 1001 and the decoding test loop 1002 to test the comprehensive performance of the audio encoding and decoding chip 400.
When the comprehensive performance of the audio codec chip 400 is tested by coupling two cycles, the data cycle is as follows: the audio analysis module 310 of the upper computer 300, the analyzer decoder 210, the analog audio input interface 111, the encoder 410, the acquisition channel module of the sound card 120, the sound card control module 320 of the upper computer 300, the audio analysis module 310 of the upper computer 300, the sound card control module 320 of the upper computer 300, the playing channel module of the sound card 120, the decoder 420, the analog audio output interface 112, the analyzer encoder 220, and the audio analysis module 310 of the upper computer 300.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled 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 present invention in its corresponding aspects.
Claims (10)
1. The utility model provides an audio frequency coding and decoding chip test fixture which characterized in that includes:
the test fixture is provided with an analog audio input interface, an analog audio output interface and a mounting position for mounting an audio coding and decoding chip to be tested, wherein the analog audio input interface and the analog audio output interface are used for being electrically connected with an audio analyzer, the analog audio input interface is used for being electrically connected with an input end of an encoder of the audio coding and decoding chip, and the analog audio output interface is used for being electrically connected with an output end of a decoder of the audio coding and decoding chip;
the sound card is provided with a first sound card interface electrically connected with an upper computer and a second sound card interface electrically connected with the output end of the encoder and the input end of the decoder.
2. The audio coding and decoding chip testing tool according to claim 1, wherein the mounting position is provided with a first interface and a second interface, a first end of the first interface is electrically connected with an output end of the encoder, a second end of the first interface is electrically connected with the second sound card interface, a first end of the second interface is electrically connected with an input end of the decoder, and a second end of the second interface is electrically connected with the second sound card interface.
3. The audio coding and decoding chip testing tool according to claim 1 or 2, wherein the first sound card interface is a USB interface.
4. The audio coding and decoding chip test tool of claim 3, wherein the sound card is a USB AISO interface protocol sound card.
5. The audio coding and decoding chip test tool according to claim 1 or 2, wherein the main control chip of the sound card comprises an acquisition access module and a play access module, an input end of the acquisition access module is electrically connected with an output end of the encoder, and an output end of the play access module is electrically connected with an input end of the decoder.
6. An audio codec chip testing apparatus, comprising:
the audio coding and decoding chip testing tool set forth in any one of claims 1-5;
the audio analyzer is electrically connected with the analog audio input interface and the analog audio output interface;
and the upper computer is electrically connected with the audio analyzer and the first sound card interface.
7. The audio codec chip testing apparatus of claim 6, wherein the audio analyzer comprises:
the input end of the analyzer decoder is electrically connected with the upper computer, and the output end of the analyzer decoder is electrically connected with the analog audio input interface;
the output end of the analyzer coder is electrically connected with the upper computer, and the input end of the analyzer coder is electrically connected with the analog audio output interface.
8. The audio codec chip testing apparatus of claim 7, comprising:
a coding test cycle comprising the upper computer, the analyzer decoder, the analog audio input interface, and the sound card;
and the decoding test cycle comprises the upper computer, the sound card, the analog audio output interface and the analyzer encoder.
9. The audio codec chip testing apparatus of claim 8,
the main control chip of the sound card comprises an acquisition channel module and a play channel module;
the encoding test cycle comprises an acquisition channel module electrically connected between the output end of the encoder and the upper computer, and the decoding test cycle comprises a play channel module electrically connected between the upper computer and the input end of the decoder.
10. The audio codec chip testing device according to any one of claims 7 to 9, wherein the upper computer includes:
the input end of the analyzer decoder and the output end of the analyzer encoder are electrically connected with the audio analysis module;
and the first sound card interface is electrically connected with the audio analysis module through the sound card control module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922058803.3U CN211128028U (en) | 2019-11-22 | 2019-11-22 | Audio coding and decoding chip test tool and audio coding and decoding chip test device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111823167A (en) * | 2020-08-10 | 2020-10-27 | 天津七一二通信广播股份有限公司 | New generation CIR automatic test fixture and implementation method thereof |
| CN115379209A (en) * | 2022-09-14 | 2022-11-22 | 北京睿芯高通量科技有限公司 | Automatic test system for video coder-decoder |
| CN115550101A (en) * | 2022-09-20 | 2022-12-30 | 中国第一汽车股份有限公司 | Automobile audio bus test system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111823167A (en) * | 2020-08-10 | 2020-10-27 | 天津七一二通信广播股份有限公司 | New generation CIR automatic test fixture and implementation method thereof |
| CN115379209A (en) * | 2022-09-14 | 2022-11-22 | 北京睿芯高通量科技有限公司 | Automatic test system for video coder-decoder |
| CN115550101A (en) * | 2022-09-20 | 2022-12-30 | 中国第一汽车股份有限公司 | Automobile audio bus test system |
| CN115550101B (en) * | 2022-09-20 | 2024-10-18 | 中国第一汽车股份有限公司 | Automobile audio bus test system |
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