Information Technology Reference
In-Depth Information
Video Quality Analysis for Concert Video
Mashup Generation
Prarthana Shrestha
1
,HansWeda
2
, Mauro Barbieri
2
,andPeterH.N.deWith
1
1
Eindhoven University of Technology
Den Dolech 2, 5600MB, Eindhoven, The Netherlands
{P.Shrestha,P.H.N.de.With}@TUE.nl
2
Philips Research Europe
High Tech Campus 34, 5656AE, Eindhoven, The Netherlands
{Hans.Weda,Mauro.Barbieri}@Philips.com
Abstract.
Videos recorded by the audience in a concert provide natural
and lively views from different angles. However, such recordings are gen-
erally incomplete and suffer from low signal quality due to poor lighting
conditions and use of hand-held cameras. It is our objective to create an
enriched video stream by combining high-quality segments from multi-
ple recordings, called
mashup
. In this paper, we describe techniques for
quality measurements of video, such as blockiness, blurriness, shakiness
and brightness. These measured values are merged into an overall qual-
ity metric that is applied to select high-quality segments in generating
mashups. We compare our mashups, generated using the quality met-
ric for segment selection, with manually and randomly created mashups.
The results of a subjective evaluation show that the perceived qualities
of our mashups and the manual mashups are comparable, while they are
both significantly higher than the random mashups.
Keywords:
no-reference video quality, multiple camera, synchroniza-
tion, blockiness, blurriness, shakiness, brightness.
1
Introduction
It has become a common practice that audiences at musical concerts record
videos using camcorders, mobile phones, digital-still cameras, etc. Consequently,
several recordings are made simultaneously of the same event. An obvious exam-
ple is found in YouTube, where the search phrase “nothing else matters london
metallica 2009” returns 18 recordings from different users (search date 08-08-
2009). We call a set of such recordings captured in an event around the same
time a
multiple-camera recording
.
In professional video productions, a multiple-camera recording is used to com-
pose an enriched video by synchronizing the recordings in a common time-line
and then selecting the most desirable segments from them. It is our objective
