Storage Device Performance Testing for DVR Reliability
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Solution Overview
Problem
The performance of storage devices used for DVR/PVR functions in consumer devices is often inadequate due to insufficient read-write operations, leading to malfunctions and misinterpretation of device defects, necessitating a method for evaluating storage device performance before use.
Innovation Solution
A binary read-write testing method that evaluates storage devices independently of file systems and formatting, determining performance profiles through mean, minimum, and maximum bit rates, and the number of simultaneous read-write operations, allowing classification for suitable video resolutions and recording capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If storage devices are used for DVR/PVR functions without prior performance testing, then the device can be immediately used for recording, but the performance may be insufficient leading to visible and audible artefacts and malfunctions
Solution Approach 1:
The patent implements preliminary performance testing of storage devices before they are used for DVR/PVR functions. The testing method evaluates read-write operations, determines performance profiles, and classifies devices according to their capability to handle specific video resolutions and recording classes. This preliminary assessment prevents performance-related malfunctions and artefacts before they occur during actual use.
2Measurement precision
If comprehensive performance testing is conducted on storage devices, then performance assessment accuracy is improved, but the testing time and complexity increase
Solution Approach 1:
The patent employs multiple testing parameters including mean bit rate, minimum bit rate, maximum bit rate, and number of simultaneous read-write operations to comprehensively assess storage device performance. By varying these parameters and evaluating performance under different conditions, the method achieves precise performance characterization without requiring excessively long test durations, as each parameter provides specific insight into device capability.
3Adaptability or versatility
If storage devices with insufficient performance are used, then device compatibility is maintained, but DVR/PVR functions are adversely affected with artefacts and glitches
Solution Approach 1:
The patent implements a feedback mechanism where performance test results are used to determine whether a storage device is suitable for specific DVR/PVR functions. The system provides feedback about the device's performance profile, indicating which video resolutions and recording classes the device can reliably support. This feedback enables users to make informed decisions about device compatibility and prevents using inadequate storage devices for functions they cannot perform reliably.
Data Source
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AI summary
Performance evaluation of a storage device, for example a storage device connected to a Set Top Box, for evaluating its suitability for supporting DVR/PVR functions such as recording a broadcast audio/video stream or time shifting a broadcast audio/video stream.