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Sensors 2017, 17(9), 2021;

Video Synchronization With Bit-Rate Signals and Correntropy Function

Department of Computer Engineering and Automation, University of Rio Grande do Norte, Rio Grande do Norte 59078-970, Brazil
Authors to whom correspondence should be addressed.
Received: 4 August 2017 / Revised: 25 August 2017 / Accepted: 30 August 2017 / Published: 4 September 2017
(This article belongs to the Special Issue Smart Communication Protocols and Algorithms for Sensor Networks)
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We propose an approach for the synchronization of video streams using correntropy. Essentially, the time offset is calculated on the basis of the instantaneous transfer rates of the video streams that are extracted in the form of a univariate signal known as variable bit-rate (VBR). The state-of-the-art approach uses a window segmentation strategy that is based on consensual zero-mean normalized cross-correlation (ZNCC). This strategy has an elevated computational complexity, making its application to synchronizing online data streaming difficult. Hence, our proposal uses a different window strategy that, together with the correntropy function, allows the synchronization to be performed for online applications. This provides equivalent synchronization scores with a rapid offset determination as the streams come into the system. The efficiency of our approach has been verified through experiments that demonstrate its viability with values that are as precise as those obtained by ZNCC. The proposed approach scored 81 % in time reference classification against the equivalent 81 % of the state-of-the-art approach, requiring much less computational power. View Full-Text
Keywords: correntropy; variable bit-rate; video synchronization correntropy; variable bit-rate; video synchronization

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Pereira, I.; Silveira, L.F.; Gonçalves, L. Video Synchronization With Bit-Rate Signals and Correntropy Function. Sensors 2017, 17, 2021.

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