TWI390397B - Device and method for audio recording test - Google Patents

Description

Audio recording test device and method

The invention relates to an audio test and analysis technology, in particular to an audio recording test device and method.

At the dawn of the Vista operating device, audio products have grown by leaps and bounds. Among them, audio codec suppliers have improved their product quality, sampling frequency and sampling bit width are getting higher and higher: from 44khz/48khz in the AC97 era, to 96khz, and the current 192khz.

High-fidelity audio products are increasingly valued by customers. Stereo and full-range audio features are the requirements of Vista operating devices for personal computer (PC) sound effects. In order to ensure the audio playback effect of the computer, it is necessary to perform audio playback test on the computer. The traditional audio playback test method has a narrow coverage and does not implement full frequency domainization of all projects. For example, when testing signal-to-noise ratio and signal distortion, only 1khz signal variation is considered.

The process of the conventional audio recording test method includes: the test device generates an analog audio signal; the sound card of the tested client converts the analog audio signal into a digital audio signal that the client can recognize, that is, a file of the audio waveform ".wav" format. And storing the audio waveform ".wav" format file on the hard disk of the tested client; copying the audio waveform ".wav" format file from the tested client hard disk and converting it into a test device The identifiable ".aas" format waveform file is output to the test equipment and then tested and analyzed. The above method of audio recording test has been The process is extremely complicated, and the test takes more time. Because the digital audio conversion is more, the lossy compression is too much, the real-time analysis cannot be realized, and the test data is not true.

In view of the above, it is necessary to provide an audio recording test device capable of performing intact lossless analog audio recording test and real-time analysis of test results, the test data is accurate and true, and the test process is simple and the test speed is fast.

In view of the above, it is also necessary to provide an audio recording test method capable of performing a complete lossless analog audio recording test and real-time analysis of test results, the test data is accurate and true, and the test process is simple and the test speed is fast.

An audio recording test apparatus includes a host, a precision audio analyzer coupled to the host, and a tested client coupled to the precision audio analyzer. The host is equipped with a precision audio analyzer audio test program for controlling a precision audio analyzer to generate an analog audio signal of different frequencies and different signal amplitudes, and using the analog signal output of the precision audio analyzer An analog audio signal is output to the client under test; and a sound card is built in the tested client, the sound card is used to record the analog audio signal and convert the analog audio signal into a digital audio signal, the tested The client control electronic switch outputs the digital audio signal to a standard sound card for converting the digital audio signal into a standard digital audio signal, and outputting the standard digital audio signal to the precision audio analysis The digital signal input of the instrument is controlled by the audio test program installed on the host computer. The precision audio analyzer tests and analyzes the digital audio signal and produces test analysis results.

An audio recording test method for performing audio recording test on a client connected to the precision audio analyzer by using a host and a precision audio analyzer connected to the host, the method comprising the following steps: (a) the host transmits The precision audio analyzer audio test program installed therein controls the precision audio analyzer to generate analog audio signals of different frequencies and different signal amplitudes, and outputs the analog audio signals to the client through the analog signal output of the precision audio analyzer; b) the sound card built into the client records the analog audio signal and converts the analog audio signal into a digital audio signal; (c) the client controls the electronic switch to output the digital audio signal to a standard sound card, the standard sound effect The card converts the digital audio signal into a standard digital audio signal, and outputs the standard digital audio signal to a digital signal input of the precision audio analyzer; and (d) an audio test program installed on the host to control the precision audio analysis The instrument performs test analysis on the digital audio signal and generates test analysis results.

Compared with the prior art, the audio recording test device and method can perform intact lossless analog audio recording test and realize real-time analysis of test results, the test data is accurate and true, and the test process is simple, the test speed is fast, and Suitable for different operating systems.

FIG. 1 is a hardware structural diagram of a preferred embodiment of the audio recording test apparatus of the present invention. The device comprises a host 2, a display 1 connected to the host 2, a precision audio analyzer 3, a standard sound card 4 and a tested client 5. The host 2 is connected through a 3.5 mm connection. The terminal 8 is connected to a precision audio analyzer 3, and the host 2 is equipped with an audio test program that controls the precision audio analyzer 3 to perform audio test and analysis. The client 5 includes a built-in sound card 6 and an electronic switch 7. The client 5 has an analog audio signal input port 210 and a universal serial bus interface (USB interface) 211. The precision audio analyzer 3 has an analog signal output 埠 310 and a digital signal input 埠 311. The USB interface 211 of the client 5 is connected to the digital signal input port 311 of the precision audio analyzer 3 via a standard sound card 4.

The host 2 is configured to control the analog audio signal of the precision audio analyzer 3 to generate different frequencies and different signal amplitudes according to actual test requirements, and output the analog audio signal to the analog audio signal input of the client 5 through the analog signal output port 310.埠210.

The sound card 6 built in the client 5 is capable of recording an analog audio signal input from the analog audio signal input port 210 and converting the analog audio signal into a digital audio signal.

The client 5 is capable of controlling the electronic switch 7 therein to output the above-described digital audio signal to the USB interface 211 of the client 5 intact and output the digital audio signal from the USB interface 211 to the standard sound card 4.

The standard sound card 4 is used to convert the digital audio signal output from the USB interface 211 into a standard digital audio signal that the precision audio analyzer 3 can receive, and output the standard digital audio signal to the digital signal input of the precision audio analyzer 3.埠311.

The host 2 controls the precision audio analyzer through the audio test program therein. The digital audio signal input from the digital signal input 埠 311 is tested and analyzed. The parameters analyzed by the test include: Full Scale Input Voltage, Frequency Response, Total Harmonic Distortion and Noise (Total) Harmonic Distortion Plus Noise), Dynamic Range, Signal to Noise Ratio, Channel Separation, and Interchannel Phase Delay, and the results of the test analysis are Displayed in the display 1 connected to the host 2.

In the preferred embodiment, the client 5 includes a mini computer, a laptop computer, a desktop computer, a notebook computer, etc., and the client 5 does not have a digital audio signal output, and cannot be used for sound effects. The digital audio signal converted into the card 6 is directly output to the digital signal input port 311 of the precision audio analyzer 3.

In another preferred embodiment of the present invention, if the client 5 used has a digital audio signal output port 212, the digital audio signal output port 212 is directly connected to the digital signal input port 311 of the precision audio analyzer 3 so that The precision audio analyzer 3 directly receives the digital audio signal output by the client 5, referring to the hardware architecture diagram of another preferred embodiment of the audio recording test apparatus shown in FIG.

2 is a flow chart of the operation of the preferred embodiment of the audio recording test method of the present invention. First, the host 2 controls the precision audio analyzer 3 to generate analog audio signals of different frequencies and different signal amplitudes according to actual test requirements, and outputs the analog audio signals to the analog audio signal input port 210 of the client 5 through the analog signal output port 310. Medium (step S100).

The sound card 6 built in the client 5 records the analog audio signal input from the analog audio signal input port 210 and converts the analog audio signal into a digital audio signal (step S102).

The client 5 controls the electronic switch 7 therein to output the above-described digital audio signal to the USB interface 211 of the client 5 intact and output the digital audio signal from the USB interface 211 to the standard sound card 4 (step S104).

The standard sound card 4 converts the digital audio signal output from the USB interface 211 into a standard digital audio signal that the precision audio analyzer 3 can receive, and outputs the standard digital audio signal to the digital signal input 311 of the precision audio analyzer 3. (Step S106).

The host 2 controls the precision audio analyzer 3 through the audio test program therein to test and analyze the digital audio signal input from the digital signal input port 311. The parameters of the test analysis include: Full Scale Input Voltage, frequency Response Response, Total Harmonic Distortion Plus Noise, Dynamic Range, Signal to Noise Ratio, Channel Separation, and Phase Between Channels An Interchannel Phase Delay or the like is displayed, and the result of the test analysis is displayed on the display 1 connected to the host 2 (step S110).

In the preferred embodiment, the client 5 includes a mini computer, a laptop computer, a desktop computer, a notebook computer, etc., and the client 5 does not have a digital audio signal output, and cannot be used for sound effects. The digital audio signal converted into the card 6 is directly output to the digital signal input of the precision audio analyzer 3 埠311.

In another preferred embodiment of the present invention (such as the audio recording test apparatus shown in FIG. 3), if the client 5 used has a digital audio signal output port 212, then in the above step S104, the client 5 controls the The electronic switch 7 outputs the above-mentioned digital audio signal to the digital audio signal output port 212 of the client 5 intact, and outputs the digital audio signal directly to the digital signal input of the precision audio analyzer 3 through the digital audio signal output 埠212.埠 311, and then directly proceeds to step S110.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention and are not intended to be limiting, and the present invention will be described in detail with reference to the preferred embodiments. Modifications or equivalents are made without departing from the spirit and scope of the invention.

1‧‧‧ display

2‧‧‧Host

3‧‧‧Precision audio analyzer

4‧‧‧Standard sound card

5‧‧‧Client

6‧‧‧ sound card

7‧‧‧Electronic switch

210‧‧‧ analog audio signal input埠

211‧‧‧Common Serial Bus Interface

310‧‧‧ analog signal output埠

311‧‧‧Digital signal input埠

212‧‧‧Digital audio signal output埠

1 is a hardware architecture diagram of a preferred embodiment of an audio recording test apparatus of the present invention.

2 is a flow chart showing the operation of the preferred embodiment of the audio recording test method of the present invention.

3 is a hardware structural diagram of another preferred embodiment of the audio recording test apparatus of the present invention.

S100‧‧‧Host Control Precision Audio Analyzer produces analog audio signals and outputs the analog audio signals to the client

S102‧‧‧A built-in sound card in the client records the analog audio signal and converts the analog audio signal into a digital audio signal

S104‧‧‧The client controls the electronic switch to output the above digital audio signal intact to the standard sound card through the USB interface.

The S106‧‧‧ standard sound card converts the digital audio signal into a standard digital audio signal and outputs it to a precision audio analyzer

S108‧‧‧Host Control Precision Audio Analyzer Tests and analyzes the above digital audio signals and obtains test analysis results

Claims (8)

An audio recording test device, comprising: a host, a precision audio analyzer connected to the host, and a tested client connected to the precision audio analyzer, wherein: the host is equipped with a precision audio analyzer audio test program, The audio test program is configured to control the analog audio signal generated by the precision audio analyzer to generate different frequencies and different signal amplitudes, and output the analog audio signal to the tested client through the analog signal output of the precision audio analyzer; and the A sound card is built in the test client, and the sound card is used for recording the analog audio signal and converting the analog audio signal into a digital audio signal, and the tested client controls the electronic switch to output the digital audio signal to a standard. a sound card for converting the digital audio signal into a standard digital audio signal, and outputting the standard digital audio signal to a digital signal input port of the precision audio analyzer, and then being installed by the host audio The test program controls the precision audio analyzer to measure the digital audio signal Analysis, and generate test results. The audio recording test apparatus of claim 1, wherein the apparatus further comprises display means connected to the host for displaying the result of the test analysis. The audio recording test apparatus of claim 1, wherein the digital signal input port of the precision audio analyzer is connected to the universal serial bus interface of the tested client through the standard sound card. The audio recording test apparatus of claim 1, wherein the analog signal output of the precision audio analyzer is directly connected to the analog audio signal input port of the tested client. An audio recording test method for performing audio recording test on a client connected to the precision audio analyzer by using a host and a precision audio analyzer connected to the host, the method comprising the following steps: installing the host through the host The precision audio analyzer audio test program controls the precision audio analyzer to generate analog audio signals of different frequencies and different signal amplitudes, and outputs the analog audio signals to the client through the analog signal output of the precision audio analyzer; built in the client The sound card records the analog audio signal and converts the analog audio signal into a digital audio signal; the client controls the electronic switch to output the digital audio signal to a standard sound card, and the standard sound card converts the digital audio signal into a standard digital audio signal, and output the standard digital audio signal to a digital signal input port of the precision audio analyzer; and an audio test program installed on the host computer controls the precision audio analyzer to test and analyze the digital audio signal, and generates Test the analysis results. The audio recording test method as described in claim 5, wherein the test analysis includes: full scale input voltage, frequency response, total harmonic distortion plus noise, dynamic range, signal to noise ratio, crosstalk And the phase delay between the channels. The audio recording test method of claim 5, wherein the digital signal input port of the precision audio analyzer is connected to the universal serial bus interface of the tested client through the standard sound card. The audio recording test method according to claim 5, wherein the analog signal output of the precision audio analyzer is directly connected to the analog audio signal input port of the tested client.