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Video Synchronization With Bit-Rate Signals and Correntropy Function.
Igor Pereira1, Luiz F Silveira2, Luiz Gonçalves3
1Department of Computer Engineering and Automation, University of Rio Grande do Norte, Rio Grande do Norte 59078-970, Brazil. igorgad@dca.ufrn.br.
Sensors (Basel, Switzerland)
|September 5, 2017
Summary
We developed a new correntropy-based method for synchronizing video streams. This approach efficiently determines time offsets for online applications, matching state-of-the-art accuracy with significantly reduced computational cost.
Area of Science:
- Signal Processing
- Computer Vision
- Data Communications
Background:
- Video stream synchronization is crucial for multimedia applications.
- Current methods like zero-mean normalized cross-correlation (ZNCC) are computationally intensive, hindering real-time performance.
- Variable Bit-Rate (VBR) signals derived from transfer rates offer a basis for synchronization.
Purpose of the Study:
- To introduce a computationally efficient correntropy-based approach for video stream synchronization.
- To enable effective synchronization for online data streaming applications.
- To achieve synchronization accuracy comparable to existing methods with reduced complexity.
Main Methods:
- Utilizing correntropy for time offset calculation.
- Implementing a novel windowing strategy optimized for online processing.
- Extracting univariate variable bit-rate (VBR) signals from video stream transfer rates.
Main Results:
- The proposed method achieves synchronization scores equivalent to the state-of-the-art ZNCC approach (81% in time reference classification).
- Demonstrated significantly lower computational complexity compared to ZNCC.
- Enabled rapid offset determination suitable for real-time, online synchronization.
Conclusions:
- Correntropy-based synchronization offers a viable and efficient alternative for online video streams.
- The novel windowing strategy enhances applicability in real-time scenarios.
- This method provides a practical solution for high-accuracy, low-complexity video stream synchronization.
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