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Restoring Video Bitstream Integrity by Resolving Field Reversal and Mixed Pulldown Errors

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2 Author(s)
Elangovan, P. ; Center for Vision, Speech & Signal Process., Univ. of Surrey, Guildford, UK ; Harding, P.R.G.

The quality of the decoded video is affected by errors occurring at various stages of the production chain. In this paper, the errors occurring in the editing layer, due to the coexistence of different video standards in the broadcast market are addressed. The problems investigated are field reversal and mixed pulldown. Field reversal is caused when the interlaced video fields are not shown in the same order as they were captured. This results in a shaky video display, as the fields are not displayed in a chronological order. Whereas, mixed pulldown artefacts occur when the video frame-rate is up-sampled and down-sampled. These errors destroy the integrity of the bitstream and continue to corrupt the videos with which it is edited. The current solution is to visually inspect the video stream. This paper investigates these errors and describes a new technique that eliminates the visual inspection process and automatically restores the bitstream integrity. The methods are based on the principles of motion flow estimation and image correlation. The new algorithms were designed for real-time implementation and outperform existing techniques with superior performance in quality and speed.

Published in:

Broadcasting, IEEE Transactions on  (Volume:59 ,  Issue: 1 )

Date of Publication:

March 2013

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