Audio Conversion Characteristic Test Method for Intercom Systems
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Solution Overview
Problem
Existing audio test methods are ineffective for devices with non-standard interfaces or transfer protocols, particularly in building intercom systems, where the conversion device's timing is critical for accurate voice quality testing, and existing methods fail to assess audio conversion characteristics effectively.
Innovation Solution
An audio conversion characteristic test method involving a sending module, system network, and receiving module, where a test signal is sent after a first time delay, and the conversion time is calculated based on the time period for feedback information to be transmitted with a sound amplitude less than a preset value, determining conversion performance and optimizing the device if necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conversion device is turned on early, then the conversion operation can be completed, but the request sent by the sending module will be converted before it is completely received causing conversion errors
Solution Approach 1:
The patent applies preliminary action by measuring the audio conversion characteristic (conversion time) in advance before actual communication occurs. The system pre-determines the time required for conversion operations, allowing the conversion device to be activated at the precisely calculated moment when the receiving module finishes receiving the request, thus avoiding both premature conversion of incomplete data and delayed conversion that would miss the feedback information.
2Reliability
If the conversion device is turned on late, then the request conversion is accurate, but the beginning of the feedback information sent by the receiving module will not be sent to the sending module
Solution Approach 1:
The patent uses feedback by measuring the audio conversion characteristic through a round-trip test signal process. The system sends a test signal, receives the converted feedback signal, and uses the measured conversion time to determine the optimal activation moment for the conversion device during actual communication, ensuring both complete request conversion and timely feedback transmission.
Solution Approach 2:
The conversion time is measured in advance through preliminary testing, allowing the system to know exactly when to activate the conversion device without causing feedback information loss.
3Ease of operation
If standard audio test methods are used for devices with non-standard interfaces or transfer protocols, then the testing process is simple, but the test results are ineffective and cannot accurately assess voice quality
Solution Approach 1:
The patent creates a universal test method that works for both standard and non-standard audio devices. By using end-to-end full-range acoustic signals that can be converted by the conversion device, the system achieves a testing approach that is universally applicable across different interface types and protocols while maintaining accurate voice quality assessment through the measured conversion characteristics.
Data Source
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AI summary
The invention relates to the technical field of audio test, and provides an audio conversion device test method. After test signals generated by a first audio signal generator reach a receiving module after a first time delay, a second audio analyzer of the receiving module measures a first time period required for a sound amplitude of feedback information sent by the receiving module to the audio channel to be less than a first pre-set value, calculate a conversion time according to the first time period and the first time delay, and determine whether a conversion performance is good according to the conversion time. By implementing the technical scheme, the conversion performance of audio can be obtained effectively through test, and the audio signal loss problem caused by advance or delayed conversion of the conversion device is avoided effectively. The method is simple and easy to implement, is of high efficiency, and effectively improves the reliability of the whole system.