Audio Video Test System Processing Parameter Measurement
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Solution Overview
Problem
Existing test systems for mobile-radio devices require external devices and additional functionalities to measure processing parameters of audio/video data, leading to incomplete and inaccurate assessments of the devices' internal processing capabilities.
Innovation Solution
A test system comprising a test device with an audio/video unit, a mobile-radio unit, and an analysis unit that measures processing parameters directly within the mobile-radio device, excluding external influences, using statistical parameters and test data to determine processing rates and jitter without requiring external cameras or encoders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If external devices (camera) and additional functionalities (encoder, packer, protocol stack) are used to measure processing parameters, then the measurement can be performed, but the device complexity and processing time increase significantly
Solution Approach 1:
The patent extracts the measurement function from the test device by placing a detection unit inside the mobile-radio device under test. This allows the processing parameters to be measured directly at the source without requiring external cameras, encoders, or protocol stack functionalities in the test device, thereby reducing test device complexity while maintaining measurement capability
Solution Approach 2:
The patent introduces a detection unit as an intermediary component within the mobile-radio device that bridges the gap between the audio/video unit and the external test device. This intermediary directly captures processing parameters (timestamp, packet information) and transmits them to the analysis unit, eliminating the need for complex external measurement setups
2Measurement precision
If external devices and additional functionalities are used to measure processing parameters, then the measurement can be performed, but the processing time increases by up to 50%
Solution Approach 1:
The patent extracts the time-consuming encoding and packaging operations from the measurement path by placing the detection unit inside the mobile-radio device. The detection unit directly observes already-processed data and extracts timing information without requiring the test device to perform encoding or packaging, thereby eliminating the 50% processing time overhead
Solution Approach 2:
The patent implements preliminary action by having the detection unit capture timestamp information and packet metadata at the point of data generation within the mobile-radio device, before the data leaves the device. This preliminary capture of measurement data eliminates the need for subsequent external processing and analysis, reducing overall measurement time
3Reliability
If the measurement includes processing times outside the mobile-radio device, then the complete system performance can be assessed, but the actual processing rate of the mobile-radio device cannot be accurately determined
Solution Approach 1:
The patent segments the measurement into two distinct parts: (1) processing time within the mobile-radio device measured by the detection unit through timestamp comparison, and (2) transmission time through the network measured separately. This segmentation allows accurate determination of the mobile-radio device's processing rate by isolating it from external processing times
Solution Approach 2:
The patent uses copying by having the detection unit create a copy of the timestamp and packet metadata at the point of data generation within the mobile-radio device. This copied information is then transmitted to the analysis unit without requiring external encoding or processing, enabling accurate measurement of the device's processing rate while maintaining system performance assessment
Data Source
AI summary
The test system according to the invention for determining processing parameters of audio and/or video data in a mobile-radio device with a test device (10) comprising an audio/video unit (11) which stores the audio/video data and outputs them as audio and/or video data-packets. Moreover, the test device (10) comprises a mobile-radio unit (12), which is connected to the audio/video unit (11), whereas the mobile-radio unit (12) is embodied for the transmission of the audio and/or video data via a mobile-radio interface (17) to a mobile-radio device (30) under test; a detection unit (13), which is connected to the mobile-radio device (30) under test and is embodied in order to detect audio and/or video data; and an analysis unit (14), which is connected to an analysis interface (15) between the audio/video unit (11) and the mobile-radio unit (12) and to the detection unit (13).