This thesis presents a new algorithm for virtual sound source positioning for the purposes of
rendering acoustic components of headphone-based virtual reality. The one-channel positioning
method using Di erential Head-Related Transfer Function (DHRTF) is introduced.
The DHRTF method utilizes localization cues (time and intensity di erences) extracted
from HRTF pairs for particular positions. In contrast to the usual two-channel ltering by
a HRTF pair, only one channel is processed when the DHRTF algorithm is applied. This
results in one channel is being delayed and attenuated with respect to the other one, which
contains the unprocessed original sound. Therefore, the nal positioned sound has the
same time and level di erences as when ltered by the HRTF pair, however, with di erent
signals in each channel.
An introduction to the eld of virtual positioning and contemporary state-of-the-art
presents the rst chapter. The theoretical concept of the DHRTF positioning method is
presented and demonstrated with model examples in the second chapter. Speci c features,
performance, and e ciency of the DHRTF algorithm are examined and compared to the
attributes of other positioning methods (namely amplitude panning and HRTF ltering)
in the last chapter.
The highlights of the results delineate remarkably good spatial depth, reduction of
processing requirements, and low a ection of natural sound timbre. Possible applications of
the DHRTF method are in assistive systems for visually impaired, in computer games audio,
and in enhancing spatialization of musical or lm mixing on digital audio workstations.
en
dc.language.iso
en
en
dc.title
SOURCE LOCALIZATION BY VIRTUAL ACOUSTIC REALITY
en
dc.title.alternative
Di erential Head-Related Transfer Function as a One-Channel Positioning Method
en
dc.type
disertační práce
cze
dc.description.department
Katedra radioelektroniky
theses.degree.discipline
Akustika
theses.degree.grantor
České vysoké učení technické v Praze. Fakulta elektrotechnická. Katedra radioelektroniky.