Audio testing system and method
First Claim
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1. An audio testing method for testing an audio signal, the method comprising:
- providing a computer system having a sound card connected to an audio-emitting device;
receiving an audio signal from the audio-emitting device;
sampling the audio signal for obtaining sampling points;
storing the sampling points in a memory system of the computer system, wherein the sampling points are divided into a plurality of groups, the sampling points sampled in each continuous P milliseconds (ms) form one of the groups of sampling points, and P ranges between 3 and 10 ms;
processing each group of sampling points stored in the memory;
taking differences between amplitude values of each two adjacent sampling points via subtraction;
taking the absolute values of all the differences and adding up all of the absolute values;
determining if the sampling points has been processed for Q times, wherein Q ranges between 5-10;
taking maximum values and minimum values from the summations, namely Max and Min upon the condition that the computer system has processed sampling points for Q times;
processing the sampling points stored in the memory into P number of sampling regions again upon the condition that the computer system has not processed sampling points for Q times;
determining if the Max/Min is equal to S, wherein S may range between 20-30;
determining that the audio signal has been distorted upon the condition that the Max/Min is equal to or more than S; and
determining that the audio signal has been not distorted upon the condition that the Max/Min is less than S.
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Abstract
An audio testing system is configured for receiving an audio signal from an audio emitting device. The system samples the audio signal and obtains sampling points from the audio signal for determining if the audio signal has been distorted. A related method is also disclosed.
18 Citations
5 Claims
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1. An audio testing method for testing an audio signal, the method comprising:
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providing a computer system having a sound card connected to an audio-emitting device; receiving an audio signal from the audio-emitting device; sampling the audio signal for obtaining sampling points; storing the sampling points in a memory system of the computer system, wherein the sampling points are divided into a plurality of groups, the sampling points sampled in each continuous P milliseconds (ms) form one of the groups of sampling points, and P ranges between 3 and 10 ms; processing each group of sampling points stored in the memory; taking differences between amplitude values of each two adjacent sampling points via subtraction; taking the absolute values of all the differences and adding up all of the absolute values; determining if the sampling points has been processed for Q times, wherein Q ranges between 5-10; taking maximum values and minimum values from the summations, namely Max and Min upon the condition that the computer system has processed sampling points for Q times; processing the sampling points stored in the memory into P number of sampling regions again upon the condition that the computer system has not processed sampling points for Q times; determining if the Max/Min is equal to S, wherein S may range between 20-30; determining that the audio signal has been distorted upon the condition that the Max/Min is equal to or more than S; and determining that the audio signal has been not distorted upon the condition that the Max/Min is less than S. - View Dependent Claims (2, 3, 4, 5)
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Specification