KR20040105369A - Apparatus for testing audio in a mobile phone - Google Patents

Abstract

PURPOSE: An audio test device of a mobile terminal is provided to receive a delivered voice signal again to compare the voice signal with a loop fed back voice signal, and to decide whether the two signals are identical, thereby simply and exactly testing each function of a speaker, a microphone, an earphone, and a hands-free unit. CONSTITUTION: A memory(22) stores a test frequency for testing audio performance. A DSP(21) outputs a switching selection signal and a test mode signal, compares levels of a loop back test frequency and the stored test frequency, and decides a test state. An ABB(Analog Base Band) processor(23) converts the received test frequency into an analog signal to output the analog signal, and converts into a digital signal to output the digital signal to the DSP(21). A path selector(24) supplies a transceiving path and a loop back path of the analog signal.

Description

Audio test device for mobile terminal {APPARATUS FOR TESTING AUDIO IN A MOBILE PHONE}

The present invention relates to an audio test apparatus for a mobile terminal, and more particularly, to an audio test apparatus for a mobile terminal that enables simple and accurate testing of functions of a speaker, a microphone, an earphone, and a handsfree for audio in mass production of a mobile terminal. .

In general, during a phone call using a mobile terminal, the user listens to the other party's voice or transmits his / her own voice to the other party through the audio unit in charge of audio.

The audio unit tests whether there is an error in the microphone, the speaker, the earphone, the hands-free part of the voice processing unit during mass production of the mobile terminal, which will be described with reference to the accompanying drawings.

1 is an exemplary view showing an audio device of a general mobile terminal, and as shown therein, a digital signal processor (DSP) of the mobile terminal 11 is referred to as a digital signal processor (11). After detecting whether the kit is connected, the switch reads the data of the memory unit 12 according to the detection result and outputs the selection signal SEL.

As a result of the detection, if the plug of the earphone is connected to the jack of the mobile terminal, the digital signal processor 11 outputs the selection signal SEL to the first and second switches 12 and 13. As a result, the transmission / reception paths EAR_TX and HFK_TX (EAR_RX and HFK_RX) of the audio input / output AUX IN / OUT of the earphone or the handsfree kit are activated.

Accordingly, audio data is input / output through the analog base band processor (ABB) 13 and the serial port (ASDI, ASDO, ASFS) of the digital signal processor 11. The audio input and output paths (AUX IN / OUT) are enabled / disabled.

However, when the earphone or the hands-free kit is not connected, the selection signal SEL is not output from the digital signal processor 11, so that the first and second switches 14a and 14b are turned off, so that the speaker 15 and the speaker 15 are not connected. Voice is transmitted and received through the microphone 16.

Therefore, voice data is input / output through serial ports (VSDI, VSDO, VSFS) of the analog baseband processor 13 and the digital signal processor 11, and the voice input / output (VINNOR, VOUTNOR) is enabled / disabled. do.

When the speaker 15 and the microphone 16 of the mobile terminal are tested, the serial port (VSDO, VSFS) using the speaker 15 and the microphone 16 in a state where the earphone or the handsfree kit is not connected. The path may also be tested or measured by connecting equipment.

In addition, when the earphone is connected to the mobile terminal to test the earphone function, the digital signal processor 11 recognizes the connected earphone (EAR DETECT), and then accesses the control register of the analog baseband processor 13 to access the control register. The speaker 15 and the microphone 16 are disabled and the first and second switches 14a and 14b are activated.

The first and second switches 14a and 14b are switched to the transmission / reception path EAR_TX / RX of the earphone through the selection signal SEL to be connected to the path of the audio input / output AUX IN / OUT. You will test it by telephone.

On the other hand, in order to test the hands-free function, when the hands-free kit is connected, the digital signal processor 11 recognizes (HFK DETECT), and then the control register of the analog baseband processor 13 as in the case of testing the earphone function described above. By suppressing the speaker 15 and the microphone 16, the first and second switches 14a and 14b are switched to the transmit / receive path HFK_TX / RX of the hands-free kit through the selection signal SEL. do.

After that, the test is made through a telephone call.

However, the above-described conventional device must make a call while the corresponding device is connected in order to grant the functions of the microphone, the speaker, the earphone, and the hands-free.

In other words, to test the microphone and speaker functions, you need to hold a mobile terminal to make a call. For the earphone function, you must make a call while the earphone is connected. To test the hands-free function, you must connect a hands-free kit and make a call.

In mass production, this takes too much test time, and if the test is conducted intuitionally without connecting equipment, the test result is inaccurate.

Accordingly, the present invention has been made to solve the above problems, and for the function test of the speaker, microphone, earphone, hands-free, which are in charge of audio during mass production of the mobile terminal, the feedback of the transmitted audio signal is loop-feedback and transmitted again. The present invention relates to an audio test apparatus of a mobile terminal, which compares one voice signal and the loop-fed voice signal to determine whether they match within a predetermined error range and to test simply and accurately.

1 is an exemplary view showing an audio device of a general mobile terminal.

Figure 2 is an exemplary view showing the configuration of an audio test apparatus of the present invention mobile terminal.

3 is an exemplary view showing the configuration of a path selection unit in FIG.

*** Explanation of symbols for main parts of drawing ***

21: digital signal processor 22: memory

23: analog baseband processor 24: path selector

25: speaker 26: microphone

24a-24e: 1st-5th switches BUF1-BUF3: 1st-3rd buffers

According to an aspect of the present invention, there is provided a mobile terminal comprising: a memory unit configured to store a test frequency for testing audio performance; When the mobile terminal is tested, the test frequency is read and output, and a switching selection signal and a test mode signal are output according to whether an earphone or a hands-free kit is connected, and the test frequency inputted by loopback and the level of the test frequency stored in the memory unit are measured. A digital signal processor for comparing a test state according to whether or not the result is within a predetermined error range; The analog baseband converts the received test frequency into an analog signal of a predetermined level according to whether the earphone or hands-free kit is connected, receives the loopback input, converts the converted signal into a digital signal, and outputs the digital signal to the digital signal processor. A processing unit; And a path selector configured to be switched by the switching selection signal and a test mode signal to provide a transmission / reception path and a loopback path of the analog signal.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

2 is an exemplary view showing the configuration of an audio test apparatus of a mobile terminal according to the present invention. In the mobile terminal, as shown therein, a memory unit 22 for storing a test frequency for testing audio performance; During the mobile terminal test, the test frequency is read and output, and a switching frequency signal and a test mode signal are output according to the connection of an earphone or a hands-free kit and looped back to the test frequency and the test frequency stored in the memory unit 22. A digital signal processor 21 for comparing the level of the control unit and determining a test state according to whether the level is within a predetermined error range; Converting the received test frequency into an analog signal having a predetermined level according to whether the earphone or hands-free kit is connected, and outputting the converted signal to a digital signal by receiving a loopback input and converting the converted signal into a digital signal; An analog baseband processor 23; It is composed of a path selector 24 which is switched by the switching selection signal and the test mode signal to provide a transmission / reception path and a loopback path of the analog signal. The operation and operation of the present invention configured as described above will be described below.

First, the mobile terminal of the present invention does not output the test mode signal from the digital signal processor 21 in the normal state other than the audio test mode, so that the first to third buffers BUF1 to BUF3 are normally shown in FIG. 3. It operates to process the transmission and reception signals through the speaker 25, the microphone 26 and the hands-free kit and earphone through the same operation as in the prior art.

On the other hand, when the test mode is selected by the tester for testing the mobile terminal, the digital signal processor 21 reads the code of the test frequency stored in the memory 22 and outputs the code to the analog baseband processor 23, the test mode. The test mode of the mobile terminal is activated by outputting a signal.

Thereafter, the analog baseband processor 23 converts the code of the test frequency into an analog signal and amplifies the signal to an analog signal so as to select a path through a path according to a function test of the earphone or hands-free or the speaker 25 and the microphone 26. Output to 24).

The test frequency signal through the above process is input to the path selector 24 which is switched by the output selection signal SEL of the digital signal processor 21 and the test mode signal. In the test mode, the path is looped back so that the analog baseband processor (23) and the digital signal processor 21, the voice signal is transmitted / received by the path selector 24 in the normal state other than the test mode.

An operation process of the path selector 24 according to the test mode and the normal state will be described in detail later.

First, in the non-test mode, all of the third to fifth switches 24c to 24e are connected to the contact ①, and both of the first to third buffers BUF1 to BUF3 operate to transfer the input signals as they are. It acts as a buffer.

In this case, the voice signal of the other party is transmitted to the speaker 25 through the third switch 24c connected to the contact ①, and the user's voice signal is transmitted to the contact ② through the microphone 26 and the first buffer BUF1. It is input to the analog baseband processor 23 via the connected third switch 24c.

That is, when the earphone is connected, the digital signal processing unit 11 recognizes this and outputs a switching selection signal for switching the first and second switches 24a and 24b to the contact point ②. The switches 24c to 24e are constantly connected to the contact ①.

In addition, when the hands-free kit is connected, the first and second switches 24a and 24b are all connected to the contact ① by the selection signal SEL, and the third to fifth switches 24c to 24e remain unchanged. Is connected to.

On the other hand, in the test mode, the first to third buffers BUF1 to BUF3 are blocked by the test mode signal, and all of the third to fifth switches 24c to 24e are connected to the contact ②.

Accordingly, in the case of the speaker 25 and the microphone 26 test, the test frequency signal of the analog baseband processor 23 is looped back through the contact ② of the third switch 24c to perform the analog baseband processor 23. Is entered.

In the case of the earphone function test, the first and second switches 24a and 24b are connected to the contact ② by the selection signal SEL, and the fifth switch 24e is connected to the contact ② by the test mode signal. The test frequency signal is looped back and input to the analog baseband processor 23.

In the hands-free function test, the first and second switches 24a and 24b are connected to the contact ① by the selection signal SEL, and the fourth switch 24d is connected to the contact ② by the test mode signal. The test frequency signal is looped back and input to the analog baseband processor 23.

The test frequency signal looped back to the analog baseband processor 23 through the above-described process is converted into a digital signal by the analog baseband processor 23 and converted into the digital signal by the digital signal processor 21. Fast fouier transform (FFT) is possible for the test frequency signal.

Thereafter, the digital signal processor 23 compares the energy level of the test frequency signal obtained through the FFT process with the energy level of the test frequency stored in the memory 22 to obtain an error, and the error falls within a certain error range. Test the audio of the mobile terminal according to whether or not.

The audio test apparatus of the mobile terminal of the present invention is not limited to the above-described embodiment, and may be variously modified and implemented within the range allowed by the technical idea of the present invention.

As described in detail above, the present invention does not need to test through a direct telephone call using an earphone or a handsfree kit to test an audio portion of a mobile terminal, thereby reducing test time. Therefore, there is an effect that mass production of the mobile terminal can be performed within the same time.

Claims (3)

In a mobile terminal, A memory unit for storing a test frequency for testing audio performance; When the mobile terminal is tested, the test frequency is read and output, and a switching selection signal and a test mode signal are output according to whether an earphone or a hands-free kit is connected, and the test frequency inputted by loopback and the level of the test frequency stored in the memory unit are measured. A digital signal processor for comparing a test state according to whether or not the result is within a predetermined error range; The analog baseband converts the received test frequency into an analog signal of a predetermined level according to whether the earphone or hands-free kit is connected, receives the loopback input, converts the converted signal into a digital signal, and outputs the digital signal to the digital signal processor. A processing unit; And a path selector configured to be switched by the switching selection signal and a test mode signal to provide a transmission / reception path and a loopback path of the analog signal. The audio test apparatus of claim 1, wherein the digital signal processing unit loops back the FFT signal of the input test frequency to determine an energy level. The apparatus of claim 1, wherein the path selector comprises: first and second switches configured to provide a transmission / reception path of a test frequency signal for an earphone or a handsfree by a switching selection signal; A third switch switched by the test mode signal to provide a loopback path of the test frequency signal to the speaker and the microphone; Fourth and fifth switches switched by the test mode signal to provide a loopback path of a test frequency signal for the earphone or handsfree; The audio test apparatus of the mobile terminal, characterized in that the buffer configured to block external reception noise to the earphone, hands-free and microphone by the test mode signal.