KR19990003372A - Audio output automatic test device and method - Google Patents

Abstract

The present invention relates to an automatic audio output test apparatus and method, and an audio signal output unit for outputting an audio signal, and a preprocessor for receiving and outputting an audio signal output from the audio signal output unit and performing preprocessing to test a level. And an audio output automatic test device including a display device for displaying a test result of the audio signal output from the microcomputer and a microcomputer for testing the output level after receiving the signal output from the preprocessor. After receiving the input signal, select the audio signal output line in turn to receive the signal converted from the analog signal output from each output line into a digital signal, and the audio that checks whether the level of the signal meets the criteria using the input digital signal value Output automatic test method It was a display.

The present invention has the effect of automatically testing the level of the audio output signal at the microcomputer, thereby increasing the accuracy of the audio output signal level test and enabling a quick test.

Description

Audio output automatic test device and method

The present invention relates to an apparatus and method for testing audio output, and more particularly, to an apparatus and method for automatically checking and testing the level of an audio output signal by a software method without a user visually checking the output signal level of the audio. It is about.

Generally, when testing the output signal level of audio, a device such as an oscilloscope can be used by a user to directly check the signal state, and the audio signal is displayed on a monitor after inputting the audio output signal to a device such as an oscilloscope. When the waveform of the user meets the criteria and meets the criteria, it is processed as a pass signal.

In the case of testing the output level of the audio signal using the oscilloscope as described above, there is a disadvantage in that accuracy is lowered and the test time takes a lot because the user directly checks the level of the signal.

The present invention has been made to solve the above problems, and has proposed an apparatus and method for automatically testing an output level of an audio signal.

That is, an audio signal output unit including a digital / analog converter and an amplifier and output an audio signal, and a switch unit and an analog / digital converter and a shift register are connected to an output terminal of the audio signal output unit. The preprocessor receives the audio signal output from the audio signal output unit and performs preprocessing to test the level, and the microcomputer is connected to the output terminal of the preprocessor and receives the signal output from the preprocessor to test and output the level. And a display device connected to the output terminal of the microcomputer and displaying a test result of the audio signal output from the microcomputer.

In addition, after receiving a test command from the microcomputer, the audio signal output line is sequentially selected to receive a signal obtained by converting the analog signal output from each output line into a digital signal, and the level of the signal is based on the input digital signal value. It provides a way to automatically test the audio output signal by checking whether it conforms to.

1 is a view showing the configuration of an automatic audio output test apparatus of the present invention;

2 is a flowchart showing a method for automatically testing an audio output of the present invention.

* Explanation of symbols for the main parts of the drawings

10: audio signal output part, 11: digital / analog converter, 12: amplifier, 20: preprocessor, 21: switch part, 22: analog / digital converter, 23: shift register, 30: microcomputer, 40: display device

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

EXAMPLE

1 is a view showing the configuration of an automatic audio output test apparatus of the present invention, which is connected to an audio signal output unit 10 for outputting an audio signal and an output terminal of the audio signal output unit 10, and outputs an audio signal output unit ( The pre-processing unit 20 receives the audio signal output from 10) and performs pre-processing to test the level and outputs the signal, and the signal output from the pre-processing unit 20 is connected to an output terminal of the pre-processing unit 20. And a display device 40 that is connected to an output terminal of the microcomputer 30 and displays an audio signal test result output from the microcomputer 30.

The audio signal output unit 10 is connected to a digital / analog converter 11 for receiving an audio signal output digitally, converting the analog signal into an analog signal, and outputting the digital signal to the digital / analog converter 11. And an amplifier 12 that receives the signal output from the analog converter 11 and amplifies and outputs the signal.

In the above, the preprocessor 20 is connected to the output terminal of the audio signal output unit 10 and the microcomputer 30 and the left and right sides of the audio signal output from the audio signal output unit 10 under the control of the microcomputer 30. A switch unit 21 for selecting and outputting a signal and an analog / digital converter 22 connected to an output terminal of the switch unit 21 and receiving an analog signal output from the switch unit 21, converting the signal into a digital signal, and outputting the digital signal. ) Is connected to the output terminal of the analog / digital converter 22 and the input terminal of the microcomputer 30 to receive and shift the parallel signal output from the analog / digital converter 22 to convert the serial data into the microcomputer 30. The shift register 23 is outputted.

In the method of automatically testing an audio signal in the audio output automatic test apparatus as described above, as shown in FIG. 2, a control signal for commanding a test execution of an audio signal is checked to perform a general function. A first step S1; A second step (S2) of selecting an arbitrary audio signal output line when a control signal for commanding a test execution of the audio signal is input in the first step (S1); A third step S3 of receiving an audio signal of a line selected in the second step S2; A fourth step (S4) of performing a level checking process using the serial digital data input in the third step (S3); A fifth step (S5) of checking whether the test result in the fourth step (S4) satisfies a condition; A sixth step S6 of displaying the test result on the display device 40 and ending the test process if the test result does not meet the condition in the fifth step S5; A seventh step S7 of displaying the test result on the display device 40 when the test result meets a condition in the fifth step S5; After the seventh step S7, it is checked whether the audio signal output line subjected to the test is an audio signal output line of a line different from the line selected in the second step S2, and the line selected in the second step S2. If it is the audio signal output line of another line, the eighth step S8 of terminating the test process and the audio signal output line tested in the eighth step S8 are the same as the line selected in the second step S2. When the audio signal output line is selected from a line different from the line selected in the second step S2, the process of the ninth step S9 is repeated.

The automatic audio output test as described above is performed in the microcomputer 30. If the audio output line selected in the second step S2 is the right line, the audio output line is selected by selecting the left audio output line in the ninth step S9. Perform the test.

In the operation of the automatic audio output test device as described above, when a control signal for executing an audio output test is input to the microcomputer 30 which is the process of the first step S1, the microprocessor 30 switches the preprocessor 20. A control signal is applied to the unit 21 to perform an operation of the second step S2 of selecting an arbitrary audio output line.

If any audio output line is selected in the above, the signal output from the audio signal output unit 10 to the selected line is converted to analog and amplified and output through the switch unit 21 of the preprocessor 20. / Digital converter 22 is converted into a digital signal and output, and the signal output from the analog / digital converter 22 is input to the shift register 23 to be serial data to the microcomputer 30 is inputted The operation of step S3 is performed.

When the serial data is input to the microcomputer 30 as described above, the microcomputer 30 performs an operation of the fourth step S4 of checking the level of the audio output signal using the input data, so that the test result meets the condition. If not, a process of outputting a control signal to display the test result on the display device 40 and then terminating the test operation is performed in steps 5 and 6 (S5 and S6), and the display device 40 performs the microcomputer 30. The control signal output from) informs the user by displaying that the audio output does not meet the conditions.

In addition, when the test result meets the above condition, the microcomputer 30 outputs a control signal to display the test result on the display device 40, and the display device 40 controls the output from the microcomputer 30. The operations of the fifth and seventh steps S5 and S7 are performed by informing the user that the audio output satisfies the condition by the signal.

After the above operation, the entire audio output test process is terminated after the operations of steps 8 and 9 (S8 and S9) of repeating the above process by selecting another audio output line other than the audio output line selected above.

As described above, the present invention, in particular, by automatically testing the level of the audio output signal at the microcomputer, it is effective to increase the accuracy of the audio output signal level test and to enable a quick test.

Claims (3)

An audio signal output unit for outputting an audio signal, a preprocessor connected to an output terminal of the audio signal output unit, and receiving and outputting an audio signal output from the audio signal output unit to perform preprocessing to test a level; And a display device connected to an output terminal for receiving a signal output from a preprocessor and testing a level and outputting the signal, and a display device for connecting the output terminal of the microcomputer to display an audio signal test result output from the microcomputer. Audio output automatic test device. The digital signal processing apparatus of claim 1, wherein the preprocessor receives an analog signal connected to the audio signal output unit and an output terminal of the microcomputer and selects and outputs the left and right signals of the audio signal output from the audio signal output unit under the control of the microcomputer. Analog / digital converter converts and outputs the signal, and the parallel terminal output from the analog / digital converter connected to the output terminal of the analog / digital converter and the input of the microcomputer receives and shifts to convert it into serial data and output to the microcomputer Audio output automatic test device, characterized in that it comprises a register. After receiving the test command from the microcomputer, the audio signal output line is selected in turn, and the analog signal outputted from each output line is converted into a digital signal, and the level of the signal meets the standard using the input digital signal value. Automatic audio output test method.