Czasopismo | ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA | Rocznik 2014 - zeszyt 4

Adaptive acoustic crosstalk cancellation in mobile computer device

10.15199/ELE-2014-007

nr katalogowy: 83717
10.15199/ELE-2014-007

Recently one of the main paradigms in audio engineering is enhancement of spatial perception of sound. In that field, Virtual Acoustic Space (VAS) technique emerges. It is based on creating an illusion of 3D audio experience by exploiting the physical foundations of spatial hearing. The well-known Head- Related Transfer Functions (HRT Fs) are often used to that end [1]. While the creation of virtual sound sources is relatively easy to achieve using headphones, obtaining a VAS using loudspeakers remains a challenge. The task is particularly difficult in mobile conditions, while using a mobile computer as a playback device. We focus on investigating the practical possibility of creating a virtual sound experience using a typical mobile computer. The examined method relies on the acoustic crosstalk cancellation algorithm. The acoustic crosstalk cancellation algorithm (often denoted XTC ) is a known tool used to eliminate the signals transmitted from the left loudspeaker to the right ear (and vice versa) in freefield listening. The goal is to enable clear transmission of signals to the ipsilateral ears, thus providing a similar auditory experience to headphone listening. It is commonly referred to as binaural audio through loudspeakers (BAL) [2]. The benefit of such an effect is advanced control of the stereo image. Ideally, spatial cues encoded in HRT Fs can be used to create virtual sound sources outside the loudspeaker area. This leads to widening of the stereo image and an enhanced audio experience. Meanwhile, the BAL effect achieved with XTC algorithm is not perfect. The cancellation of signals transmitted to the contralateral ears is achieved only to a limited area - the sweet spot. Outside the sweet spot the crosstalk cancellation fails and perceived sound is degraded due to spectral coloration. Due to the physical constraints of the algorithm even a slight displacement of the head can deteriorate the XTC efficiency. In ou[...]

Jeśli masz wykupiony/przyznany dostęp - zaloguj się. Skorzystaj z naszych propozycji zakupu!

Publikacja


e-Publikacja (format pdf) - nr 56268 "ANALIZA WYCISKANIA PRĘTÓW..." licencja: Osobista Produkt cyfrowy	10.00 zł

Zeszyt


RUDY I METALE NIEŻELAZNE - e-zeszyt (pdf) 2010-12 licencja: Osobista Produkt cyfrowy	32.00 zł

Zeszyt

2014-4

Twój Koszyk

Publikacja

Zeszyt

Zeszyt

Czasopisma