Audio test equipment and audio test system

Abstract

The utility model provides an audio test device and an audio test system, and relates to the technical field of electronic device detection, and the audio test device comprises an audio bus interface, an analog input interface, a codec and a digital signal processor. By integrating the audio bus interface and the analog input interface, the A2B signal acquisition and transmission device has the function of A2B signal transmission and acquisition and the characteristic of master-slave integration. Through the codec, an input external analog audio signal can be received, and through the digital signal processor, a function of carrying out audio testing on the connected first external equipment and second external equipment by using the input signal can be realized. The DSP can collect audio data and carry out unvarnished transmission, and an audio signal link is not affected. The audio test equipment can receive the external analog audio signal and the A2B signal at the same time, and realizes the simultaneous test of audio signals in different formats. As a complete multi-interface device, the audio test device can reduce the time delay of the whole test system.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic device detection technical field especially, relate to an audio frequency test equipment and audio frequency test system. BACKGROUND

[0002] With the development of various acoustic devices, people's requirements for audio quality are also getting higher and higher, so the industry related to acoustic devices has an increasing demand for audio testing. The development tools of automobile power amplifier products are not complete in the development and test, real vehicle troubleshooting and after-sales problem handling, the test equipment is various and not unified, the test function cannot be integrated, and the real vehicle after-sales troubleshooting is difficult. R&D test personnel need to configure various types of test tools to meet the growing demand, which will increase the R&D cost. Moreover, due to the different specifications of the test equipment, it is difficult to use in electromagnetic compatibility (EMC) / electromagnetic susceptibility (EMS) test environment. In addition, the product after-sales personnel in after-sales due to the hidden installation position of the vehicle audio equipment, it is difficult to disassemble, which leads to the difficulty in positioning the problem equipment, and the problem of reading error parameters occurs.

[0003] The existing audio test scheme is to use audio bus (A2B) transmission equipment, controller area network (CAN) bus transceiver, audio input detection equipment and other independent devices to test a signal alone, or to analyze by combining them. For single test function, it can meet the requirements, but it is not enough for simultaneous testing of analog / digital multi-channel multi-format signals. Moreover, since it is each independent device, it will lead to large delay of the whole test system. UTILITARY MODEL CONTENT

[0004] The utility model provides an audio test equipment and audio test system to solve the defects in the related art.

[0005] The utility model provides an audio test equipment, which comprises an audio bus interface, an analog input interface, a codec and a digital signal processor.

[0006] The audio bus interface is connected with the digital signal processor.

[0007] The analog input interface is connected with the digital signal processor through the codec.

[0008] The audio bus interface is used for transmitting an audio bus signal.

[0009] The analog input interface is configured to access an external analog audio signal.

[0010] The codec is configured to perform analog-to-digital conversion on the analog audio signal.

[0011] The digital signal processor is configured to perform audio signal pass-through and audio testing on a first external device connected to the audio bus interface and a second external device connected to the audio bus interface and the analog input interface.

[0012] According to the audio testing device provided by the utility model, further include: universal serial bus interface, controller area network bus interface and system level chip;

[0013] The system level chip is connected with the digital signal processor, the universal serial bus interface and the controller area network bus interface respectively.

[0014] The controller area network bus interface is configured to access a controller area network bus signal.

[0015] The universal serial bus interface is configured to connect a third external device, and the third external device comprises a host computer, and the host computer is configured to configure the audio testing device through the system level chip and analyze a signal received by the audio testing device.

[0016] The digital signal processor is further configured to send the controller area network bus signal to the second external device through the audio bus interface.

[0017] According to the audio testing device provided by the utility model, the third external device further comprises a Bluetooth module.

[0018] The Bluetooth module is configured to transmit an external audio signal.

[0019] According to the audio testing device provided by the utility model, the system level chip corresponds to a first cache and a memory, and the digital signal processor corresponds to a second cache.

[0020] According to the audio testing device provided by the utility model, further include: earphone interface, the earphone interface is connected with the codec, the earphone interface is configured to access earphone.

[0021] The codec is further configured to receive an internal digital audio signal output by the digital signal processor, perform digital-to-analog conversion on the internal digital audio signal, and obtain an internal analog audio signal.

[0022] The earphone is configured to play the internal analog audio signal.

[0023] The audio test device further comprises a fiber transmission interface and a fiber receiving interface, the fiber transmission interface and the fiber receiving interface are connected with the digital signal processor respectively;

[0024] The fiber transmission interface is used for connecting an input fiber and receiving an input optical signal carrying an audio signal through the input fiber;

[0025] The fiber receiving interface is used for connecting an output fiber and transmitting an output optical signal carrying an audio signal through the output fiber.

[0026] The audio test device further comprises a fiber transmission interface and a fiber receiving interface, the fiber transmission interface and the fiber receiving interface are connected with the digital signal processor respectively;

[0027] The audio test device further comprises a fiber transmission interface and a fiber receiving interface, the fiber transmission interface and the fiber receiving interface are connected with the digital signal processor respectively;

[0028] The car machine is connected with the digital signal processor through the audio bus interface;

[0029] The input end of the power amplifier is connected with the digital signal processor through the audio bus interface;

[0030] The output end of the power amplifier is connected with the digital signal processor through the analog input interface.

[0031] The audio test device further comprises a power module, and the power module is used for supplying power for the audio test device.

[0032] The audio test device further comprises a power module, and the power module is used for supplying power for the audio test device.

[0033] The first external device is connected with the digital signal processor of the audio test device through the audio bus interface of the audio test device;

[0034] The second external device is connected with the digital signal processor through the audio bus interface and the analog input interface of the audio test device.

[0035] The audio test equipment and the audio test system provided by the utility model, audio test equipment includes: audio bus interface, analog input interface, codec and digital signal processor, through the integration audio bus interface and analog input interface, can have the function of A2B signal sending collection, have the characteristic of master-slave integration, and, the audio test equipment contains the codec, can receive the input external analog audio signal, through the digital signal processor can realize the function of using the input signal to audio test the connected first external device and second external device, DSP can collect audio data and transmit, will not have the influence to audio signal link, the audio test equipment can receive external analog audio signal and A2B signal simultaneously, realize the simultaneous test of different format audio signal, and, the audio test equipment as a complete multi-interface equipment, can reduce the delay of overall test system, and then improve the audio test efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical scheme in the utility model or related art, the following will briefly introduce the drawings needed to be used in the embodiment or related art description, obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor on the premise of these drawings.

[0037] Figure 1 It is the structural schematic diagram of the prior audio test system.

[0038] Figure 2 It is one of the structural schematic diagram of the audio test equipment provided by the utility model.

[0039] Figure 3 It is the connection schematic diagram between the audio test equipment and the car machine, power amplifier provided by the utility model.

[0040] Figure 4 It is the second structural schematic diagram of the audio test equipment provided by the utility model.

[0041] Figure 5 It is the structural schematic diagram of the audio test system provided by the utility model. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantage of the utility model more clear, the following will combine the drawings in the utility model, and the technical scheme in the utility model is clearly and completely described, obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiment, based on the embodiment in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the utility model.

[0043] Since the existing audio test scheme is to test one signal by independent equipment or to analyze by combination, it cannot realize simultaneous test and will cause large delay of the whole test system. Figure 1 As shown in the prior art, the car machine and the power amplifier (referred to as power amplifier) are directly connected through A2B, the A2B interface on the car machine is the sending end (A), and the A2B interface on the power amplifier is the receiving end (B). When performing audio test, the A2B needs to be destroyed, which increases the cost of audio test.

[0044] Based on this, the utility model embodiment provides an audio test device.

[0045] Figure 2 As shown in the structure diagram of the audio test device provided in the utility model embodiment, the audio test device comprises a first A2B interface 21, an analog input interface 22, a codec 23 and a digital signal processor (DSP) 24. Figure 2

[0046] The first A2B interface 21 is connected with the DSP 24.

[0047] The analog input interface 22 is connected with the DSP 24 through the codec 23.

[0048] The first A2B interface 21 is used for transmitting A2B signal.

[0049] The analog input interface 22 is used for inputting external analog audio signal.

[0050] The codec 23 is used for analog-digital conversion of the external analog audio signal.

[0051] The DSP 24 is configured to perform audio signal transparent transmission and audio test on a first external device connected with the first A2B interface 21 and a second external device connected with the first A2B interface 21 and the analog input interface 22.

[0052] Specifically, in the utility model embodiment, the first A2B interface 21 is connected with the DSP 24 and is used for transmitting A2B signal, the first A2B interface 21 can comprise one or more, each first A2B interface 21 can comprise a sending end and a receiving end. A2B signal can be sent to the first type of external device connected with the first A2B interface 21 through the sending end, and the A2B signal sent by the first type of external device can be received through the receiving end. Here, the A2B signal refers to the signal transmitted by A2B, which is an audio signal.

[0053] ​The first external device can include a car head unit, and the second external device can include a power amplifier. The car head unit and the input end of the power amplifier can be connected to the audio test device through different first A2B interfaces 21.

[0054] The analog input interface 22 can include one or more, and each analog input interface 22 can be connected to the DSP 24 through a codec 23. Each analog input interface 22 is used to access an external analog audio signal. The output end OUT of the power amplifier can also be connected to the audio test device through the analog input interface 22. At this time, the external analog audio signal can be an analog audio signal output by the power amplifier. The external analog audio signal can be converted into a digital audio signal through the codec 23, and then the codec 23 can send the digital audio signal converted by the analog-to-digital conversion to the DSP 24.

[0055] As shown in FIG. 1, the audio test device provided in the embodiment of the utility model can be connected to the transmitting end of the A2B interface of the car head unit through the receiving end of a first A2B interface, and connected to the receiving end of the A2B interface of the power amplifier through the transmitting end of another first A2B interface. Figure 3

[0056] The DSP 24 can transmit and analyze the received signal to determine whether the first type of external device is abnormal. For example, the received digital audio signal can be analyzed to determine whether the output of the power amplifier connected to the analog input interface 22 is normal; the received A2B signal can also be analyzed to determine whether the performance of the car head unit and the power amplifier connected to the first A2B interface 21 is normal.

[0057] The audio test device provided in the embodiment of the utility model includes an audio bus interface, an analog input interface, a codec, and a digital signal processor. By integrating the audio bus interface and the analog input interface, the audio test device can have the function of A2B signal transmission and collection, and have the characteristics of master-slave integration. Moreover, the audio test device contains a codec, which can receive an input external analog audio signal. The digital signal processor can realize the function of audio testing of the connected first external device and second external device using the input signal. The DSP can collect audio data and transmit it without affecting the audio signal link. The audio test device can simultaneously receive external analog audio signals and A2B signals, and simultaneously test different formats of audio signals. When the audio bus interface and the analog input interface each include multiple, multi-channel signal testing can be realized. Therefore, the audio test device can realize multi-channel multi-format input and output signal testing. Moreover, as a complete multi-interface device, the audio test device can reduce the delay of the overall test system, thereby improving the audio test efficiency.

[0058] As shown in FIG. 1, the audio test device provided in the embodiment of the utility model can be connected to the transmitting end of the A2B interface of the car head unit through the receiving end of a first A2B interface, and connected to the receiving end of the A2B interface of the power amplifier through the transmitting end of another first A2B interface.​Figure 4 The audio test device provided in the embodiment of the utility model includes two A2B interfaces and four analog input interfaces, both of the two A2B interfaces are connected with the DSP, and all of the four analog input interfaces are connected with the DSP through the codec.

[0059] The two A2B interfaces are A2B interface 41 and A2B interface 42 respectively, the A2B interface 41 includes A2B41_A port and A2B41_B port, and the A2B interface 42 includes A2B42_A port and A2B42_B port.

[0060] The four analog input interfaces are analog input interface 1, analog input interface 2, analog input interface 3 and analog input interface 4 respectively.

[0061] On the basis of the above-mentioned embodiment, the audio test device provided in the embodiment of the utility model further includes: a universal serial bus (Universal Serial Bus, USB) interface, a CAN bus interface and a system on chip (System on Chip, SOC).

[0062] The SOC is connected with the DSP, the USB interface and the CAN bus interface respectively;

[0063] The CAN bus interface is used for accessing the CAN bus signal;

[0064] The USB interface is used for connecting a third external device, and the third external device includes a host computer, and the host computer is configured to configure the audio test device through the SOC and analyze the signal received by the audio test device;

[0065] The DSP is further configured to send the CAN bus signal to the second external device through the A2B interface.

[0066] Specifically, the CAN bus signal can be the signal transmitted by the CAN bus connected with the car machine, and the DSP can be further configured to send the CAN bus signal to the power amplifier through the A2B interface to wake up, control and the like the power amplifier.

[0067] The audio test device can be connected with the host computer through the USB interface and can receive the configuration data of the host computer, and the SOC configures the audio test device through the configuration data. The host computer can also send an audio signal to the SOC, and the SOC transmits the audio signal to the power amplifier through the DSP via the A2B interface to test the performance of the power amplifier.

[0068] Meanwhile, the SOC can also transmit the signal received by the audio test device to the host computer, and the host computer analyzes the received signal to realize audio testing.

[0069] The audio test device in the embodiment of the utility model has USB interface and CAN bus interface simultaneously, can realize configuration through host computer, and can be used as transceiver of CAN bus, and can realize audio test without vehicle computer.

[0070] The existing audio test scheme has no expansion function port, and cannot directly match new requirements, so that new test equipment needs to be made again, prolonging the development time.

[0071] On the basis of the above embodiment, the second external device further comprises a Bluetooth module.

[0072] The Bluetooth module is used for transmitting external audio signals.

[0073] Specifically, the USB interface can also access the Bluetooth module, which can be used for transmitting external audio signals, and then the external audio signals can be tested in combination with the power amplifier. In addition, the USB interface can also access other devices, such as Ethernet devices, to realize function expansion.

[0074] On the basis of the above embodiment, as shown in Figure 4 The SOC corresponds to a first cache and a memory, stores the received signals through the first cache, and processes the received signals through the memory. The DSP corresponds to a second cache, and stores the received signals through the second cache.

[0075] On the basis of the above embodiment, the audio test device provided in the embodiment of the utility model further comprises: one or more earphone interfaces, each earphone interface is connected with a codec, and each earphone interface is used for accessing earphones. As shown in Figure 4 The audio test device can include two earphone interfaces, namely earphone interface 1 and earphone interface 2.

[0076] The codec is also used for receiving internal digital audio signals output by the DSP, and performing digital-to-analog conversion on the internal digital audio signals to obtain internal analog audio signals. The internal digital audio signals can be digital audio signals stored in the first cache in the DSP. The internal digital audio signals are converted by the codec and played through the earphones connected through the earphone interfaces, so that the earphones can be tested.

[0077] As shown in Figure 4 On the basis of the above embodiment, the audio test device provided in the embodiment of the utility model further comprises: a fiber sending interface and a fiber receiving interface, and the fiber sending interface and the fiber receiving interface are connected with the DSP respectively.

[0078] The optical fiber transmitting interface is used for connecting an input optical fiber and receiving an input optical signal carrying an audio signal through the input optical fiber.

[0079] The optical fiber receiving interface is used for connecting an output optical fiber and transmitting an output optical signal carrying an audio signal through the output optical fiber.

[0080] In the embodiment of the utility model, the audio test device is configured with the optical fiber transmitting interface and the optical fiber receiving port, can have the transmitting and receiving function of optical signal, and further can test the audio signal carried by the optical signal.

[0081] On the basis of the above embodiment, the analog audio signal is a differential analog audio signal.

[0082] On the basis of the above embodiment, as shown in the figure, Figure 3 The first external device includes a car machine, and the second external device includes a power amplifier;

[0083] The car machine is connected with the DSP through an A2B interface;

[0084] The input end of the power amplifier is connected with the DSP through the A2B interface;

[0085] The output end of the power amplifier is connected with the DSP through an analog input interface.

[0086] On the basis of the above embodiment, as shown in the figure, Figure 4 The audio test device further comprises a power module connected with the DSP and the SOC, and used for power supply.

[0087] On the basis of the above embodiment, as shown in the figure, Figure 5 The utility model embodiment further provides an audio test system, comprising: a first external device 51, a second external device 52 and the audio test device 53 provided in each of the above embodiments.

[0088] The first external device 51 is connected with the DSP through the A2B interface of the audio test device 53;

[0089] The second external device 52 is connected with the DSP through the A2B interface and the analog input interface.

[0090] The audio test system provided in the embodiment of the utility model can realize the audio test by directly connecting the audio test device between the first external device and the second external device without damaging the signal line, and avoids the cost problem caused by the destructive test.

[0091] The apparatus embodiments described above are merely illustrative, wherein the units described as separated components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Part or all of the modules can be selected to achieve the purpose of the embodiment scheme according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0092] Through the description of the above embodiments, those skilled in the art can clearly understand that the embodiments can be realized by means of software and the necessary general hardware platform, and of course can also be realized by hardware. Based on such understanding, the above technical solutions can be embodied in the form of software products, and the computer software products can be stored in a computer readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and include a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiments.

[0093] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An audio test device, characterized by, Comprising: an audio bus interface, an analog input interface, a codec, and a digital signal processor; the audio bus interface is connected with the digital signal processor; the analog input interface is connected with the digital signal processor through the codec; the audio bus interface is used for transmitting an audio bus signal; the analog input interface is used for accessing an external analog audio signal; the codec is used for analog-digital conversion of the analog audio signal; the digital signal processor is configured to perform audio signal transparent transmission and audio testing on a first external device connected with the audio bus interface and a second external device connected with the audio bus interface and the analog input interface.

2. The audio testing device of claim 1, wherein, Further comprising: a universal serial bus interface, a controller area network bus interface, and a system on chip; the system on chip is connected with the digital signal processor, the universal serial bus interface, and the controller area network bus interface respectively; the controller area network bus interface is used for accessing a controller area network bus signal; the universal serial bus interface is used for connecting a third external device, the third external device comprising a host computer, the host computer being configured to configure the audio testing device through the system on chip and analyze signals received by the audio testing device; the digital signal processor is further configured to send the controller area network bus signal to the second external device through the audio bus interface.

3. The audio test device of claim 2, wherein, The third external device further comprises a Bluetooth module; the Bluetooth module is used for transmitting an external audio signal.

4. The audio test device of claim 2, wherein, The system on chip corresponds to a first cache and a memory, and the digital signal processor corresponds to a second cache.

5. The audio testing device of claim 1, wherein, Further comprising: a headphone interface, the headphone interface being connected with the codec, and the headphone interface being used for accessing a headphone; the codec is further used for receiving an internal digital audio signal output by the digital signal processor, and performing digital-analog conversion on the internal digital audio signal to obtain an internal analog audio signal; the headphone is used for playing the internal analog audio signal.

6. The audio testing device of claim 1, wherein, Further comprising: a fiber sending interface and a fiber receiving interface, the fiber sending interface and the fiber receiving interface being connected with the digital signal processor respectively; the fiber sending interface is used for connecting an input fiber and receiving an input optical signal carrying an audio signal through the input fiber; the fiber receiving interface is used for connecting an output fiber and sending an output optical signal carrying an audio signal through the output fiber.

7. The audio testing device of any one of claims 1-6, wherein, The analog audio signal is a differential analog audio signal.

8. The audio testing device of any one of claims 1-6, wherein, The first external device comprises a car machine, and the second external device comprises a power amplifier; the car machine is connected with the digital signal processor through the audio bus interface; an input end of the power amplifier is connected with the digital signal processor through the audio bus interface; an output end of the power amplifier is connected with the digital signal processor through the analog input interface.

9. The audio testing device of any one of claims 1-6, wherein, Further comprising a power module, the power module being used for powering the audio testing device.

10. An audio test system, characterized by Comprising: a first external device, a second external device, and the audio testing device according to any one of claims 1-9. The first external device is connected with the digital signal processor of the audio test device through an audio bus interface of the audio test device; The second external device is connected with the digital signal processor through the audio bus interface and an analog input interface of the audio test device.

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