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Method for testing functions of audio codec of system on chip

An audio codec and system-on-chip technology, which is applied to the testing field of the audio codec function of the system-on-chip, can solve the problems of multiple labor costs and multiple testing times, and achieves the goal of reducing area, saving testing time, and reducing testing labor costs. Effect

Pending Publication Date: 2022-01-18
北京君正集成电路股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 2. Need more test components (input devices and output devices);
[0011] 3. Need more testing time;
[0012] 4. Need more labor cost

Method used

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  • Method for testing functions of audio codec of system on chip
  • Method for testing functions of audio codec of system on chip

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Experimental program
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Embodiment Construction

[0036] The following only takes mono audio differential transmission as an example. Such as figure 1 As shown, the present invention relates to a method for testing the function of a system-on-chip audio codec, said method comprising the following steps:

[0037] S1. Connect the differential output pin and input pin of the CODEC to the capacitor respectively;

[0038] S2. In the tape-out test process, a standard sample audio source is prepared in advance, and then output by the AO output pin after the DA conversion of the CODEC;

[0039] S3. After the capacitive circuit, the AI ​​input pin of the CODEC collects the signal and performs AD conversion inside the CODEC to generate a new sound file;

[0040] S4. Finally, analyze the newly generated digital sound file to obtain the signal-to-noise ratio and total harmonic distortion value of the relevant parameters of the sound signal, and judge whether the performance and function of the CODEC meet the design index according to t...

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PUM

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Abstract

The invention provides a method for testing a function of a audio codec of a system on chip. In the AUDIO CODEC testing process in the SOC, a LOOPBACK mode is adopted, the area of a testing circuit board is reduced, and the aim of judging the performance and the function of the CODEC is achieved without input and output equipment. In the testing process of an audio codec in the system on chip, recording and playback equipment are not externally connected, the system on chip is not placed in a special mute room or a mute device, a sample standard sound source is played by the CODEC in a LOOPBACK mode, then the sample standard sound source is collected by a differential input pin of the CODEC, and the performance and the function of the CODEC are judged according to relevant parameters of the quality of the collected sound.

Description

technical field [0001] The invention relates to the field of system testing, in particular to a method for testing audio codec functions of an on-chip system. Background technique [0002] At present, many chip manufacturers will integrate audio codec (AUDIO CODEC) devices inside the system on chip (SOC) according to market demand and product positioning, so as to achieve the purpose of enhancing the market competitiveness of products. AUDIO CODEC generally has the following functions: [0003] ① Perform D / A conversion on signals such as PCM, and convert digital audio signals into analog signals [0004] ② Perform A / D conversion on analog signals from input sources such as MIC and Linein, and convert the analog signals into digital signals that can be processed by the CPU [0005] ③Process the audio signal, such as volume control, power amplification, equalizer adjustment, etc. [0006] Each manufacturer may use single-ended signal or differential signal transmission acco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/22G06F11/26
CPCG06F11/2273G06F11/26G06F11/2205
Inventor 李燕飞
Owner 北京君正集成电路股份有限公司
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