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Motion compensated deinterlacer: analysis and implementation
2008 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In the early days of television as Cathode Ray Tube (CRT) screens became brighter, the level of flicker caused by progressive scanning became more noticeable. This is because the human visual system is sensitive to large-area flicker. Interlaced scanning was invented in 1932 as a redeem to this difficulty. In contrast to progressive scanning, where every line is drawn in sequence, interlaced scanning alternates lines of a frame in half a frame interval, called a field. The conversion process from interlace scan to progressive scan is called deinterlacing. In this thesis, two deinterlacing methods, which use motion information from the video sequence, were used in conjunction to obtain an improved result. Thus, the process of finding the true motion on the interlaced video sequence also had to be analyzed. The analysis was done on artificially generated test sequences, as well as true video sequences. The result was measured using the Mean Square Error between a progressive input sequence and the deinterlaced output sequence. This measurement was compared to a much simpler deinterlacing algorithm and showed large improvements, primarily in sense of aliasing. However, in some cases, the deinterlacer produced severe artifacts causing picture degradation.

Place, publisher, year, edition, pages
Keyword [en]
Technology, Signalbehandling, Videoteknik, Deinterlacer, Motion, compensation
Keyword [sv]
URN: urn:nbn:se:ltu:diva-44499ISRN: LTU-EX--08/126--SELocal ID: 24b1eb16-d2b8-4a1f-97fb-b1eb5d65469aOAI: diva2:1017778
Subject / course
Student thesis, at least 30 credits
Educational program
Arenaprogrammes (2002-2014)
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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